Best MonthJanuary
TExplore Score8.5 / 10
Best TimeBest overall: February; strong alternatives: November and January.
Best SeasonWinter
Ideal TripWeekend
The strongest overall windows for San Juan are February, November and January. February leads this dataset's balance of weather, rain, comfort, crowds, value and seasonal appeal. Travelers with different priorities should compare the full month table before booking.
San Juan is a small town in Texas’s South Texas Plains tourism region. It is most useful for travelers comparing sightseeing, history, road trip, scenic across the year. This guide evaluates every month with one consistent framework covering temperature, precipitation, humidity, daylight, comfort, outdoor suitability, expected demand, relative cost and traveler fit. Climate values use the nearest complete NOAA 1991–2020 monthly-normal station, RIO GRANDE CITY, located approximately 8.6 miles from the destination reference point. Scores help compare months; they do not replace a short-range forecast or current operating notices.
TExplore Score8.5Great
Compare all 12 months for San Juan using climate normals, crowds, value, comfort and traveler-fit scores.
January Scores
The strongest month at a glance.
Weather9.5Excellent
Rain8.4Great
Crowds7.0Good
Value8.4Great
Comfort10.0Excellent
Outdoors9.5Excellent
Seasonal Appeal8.1Great
Cost$$Moderate
Best Time For
Best WeatherJanuary9.5 / 10
Least RainFebruary8.5 / 10
Lowest CrowdsAugust7.6 / 10
Best ValueJanuary8.4 / 10
FamiliesJanuary9.9 / 10
CouplesJanuary9.8 / 10
SoloJanuary9.3 / 10
RomanticJanuary9.6 / 10
RelaxingJanuary9.6 / 10
OutdoorsJanuary9.5 / 10
SightseeingJanuary10.0 / 10
How Long Should You Stay?
1 DayGreat
Half DayLess Ideal
2 DaysGreat
Day TripLess Ideal
3 DaysFair
WeekendExcellent
4–5 DaysLess Ideal
1 Week+Less Ideal
10 Days+Less Ideal
Sweet Spot: Weekend
Choose a Month
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San Juan in January
8.5 / 10 Great
January in San Juan is typically mild to warm, with an average high near 70.7°F and low near 45.2°F at the selected NOAA reference station. The normal monthly rainfall is about 0.78 inches across 5.8 measurable-rain days, so visitors should expect limited rain interruption. Light crowds and $$ – moderate conditions shape the overall trade-off. The month is strongest for sightseeing, families, couples, especially when the plan emphasizes sightseeing, history, road trip. Use the scores as a consistent comparison tool and check short-range forecasts and official access alerts before departure.
Weather9.5
Rain8.4
Crowds7.0
Value8.4
Comfort10.0
Outdoors9.5
Seasonal Appeal8.1
Cost$$
Month at a Glance
- Average High
- 70.70°F
- Average Low
- 45.20°F
- Rainfall
- 0.78 in
- Rainy Days
- 5.80
- Humidity
- 68.30%
- Daylight
- 10.60 hr
- Crowds
- Light crowds
- Cost
- $$ – Moderate
All 12 Months
Compare the full year. On phones, every month becomes its own easy-to-read card.
| Month | Overall | Weather | Rain | Crowds | Cost | Best For |
|---|---|---|---|---|---|---|
| January | 8.5 | 9.5 | 8.4 | Moderate | $$ | Sightseeing, Families, Couples |
| February | 8.5 | 9.5 | 8.5 | Moderate | $$ | Sightseeing, Families, Couples |
| March | 8.3 | 9.5 | 8.3 | Busy | $$ | Sightseeing, Families, Couples |
| April | 8.3 | 9.1 | 8.5 | Moderate | $$ | Sightseeing, Families, Couples |
| May | 7.5 | 7.6 | 7.1 | Moderate | $$ | Sightseeing, Families, Couples |
| June | 7.0 | 6.6 | 7.3 | Moderate | $$ | Sightseeing, Families, Couples |
| July | 7.0 | 6.6 | 7.8 | Moderate | $$ | Sightseeing, Families, Couples |
| August | 7.4 | 6.6 | 8.3 | Moderate | $$ | Sightseeing, Families, Couples |
| September | 6.9 | 6.8 | 4.9 | Moderate | $$ | Sightseeing, Families, Couples |
| October | 8.1 | 8.8 | 7.4 | Moderate | $$ | Sightseeing, Families, Couples |
| November | 8.5 | 9.5 | 8.3 | Moderate | $$ | Sightseeing, Families, Couples |
| December | 8.2 | 9.5 | 8.3 | Busy | $$ | Sightseeing, Families, Couples |
Best to Worst Months
- 1January8.5
- 2February8.5
- 3November8.5
- 4April8.3
- 5March8.3
- 6December8.2
- 7October8.1
- 8May7.5
- 9August7.4
- 10July7.0
- 11June7.0
- 12September6.9
GreatJanuary · February · November · April · March · December · October
GoodMay · August · July
FairJune · September
Season Overview
Spring
8.0 / 10April is the strongest month in this season, based on the same overall scoring formula.
Summer
7.1 / 10August is the strongest month in this season, based on the same overall scoring formula.
Fall
7.8 / 10November is the strongest month in this season, based on the same overall scoring formula.
Winter
8.4 / 10January is the strongest month in this season, based on the same overall scoring formula.
Traveler Suitability
Families9.9 / 10
Couples9.8 / 10
Solo9.3 / 10
Romantic9.6 / 10
Relaxing9.6 / 10
Outdoors9.5 / 10
Sightseeing10.0 / 10
Cost Through the Year & Crowds Through the Year
CostJan$$Feb$$Mar$$Apr$$May$$Jun$$Jul$$Aug$$Sep$$Oct$$Nov$$Dec$$
CrowdsJanModerateFebModerateMarBusyAprModerateMayModerateJunModerateJulModerateAugModerateSepModerateOctModerateNovModerateDecBusy
January in San Juan
70.70° / 45.20°F 0.78 in Light crowds $$
January in San Juan is typically mild to warm, with an average high near 70.7°F and low near 45.2°F at the selected NOAA reference station. The normal monthly rainfall is about 0.78 inches across 5.8 measurable-rain days, so visitors should expect limited rain interruption. Light crowds and $$ – moderate conditions shape the overall trade-off. The month is strongest for sightseeing, families, couples, especially when the plan emphasizes sightseeing, history, road trip. Use the scores as a consistent comparison tool and check short-range forecasts and official access alerts before departure.
Why Visit
Choose January for sightseeing, history, road trip, a 9.5/10 weather score, and light crowds relative to this destination's busier periods.
Things to Know
Conditions can change quickly; confirm forecasts, operating hours and reservation requirements.
February in San Juan
76.30° / 49.80°F 0.95 in Light crowds $$
February in San Juan is typically mild to warm, with an average high near 76.3°F and low near 49.8°F at the selected NOAA reference station. The normal monthly rainfall is about 0.95 inches across 4.5 measurable-rain days, so visitors should expect limited rain interruption. Light crowds and $$ – moderate conditions shape the overall trade-off. The month is strongest for sightseeing, families, couples, especially when the plan emphasizes sightseeing, history, road trip. Use the scores as a consistent comparison tool and check short-range forecasts and official access alerts before departure.
Why Visit
Choose February for sightseeing, history, road trip, a 9.5/10 weather score, and light crowds relative to this destination's busier periods.
Things to Know
Conditions can change quickly; confirm forecasts, operating hours and reservation requirements.
March in San Juan
82.00° / 56.30°F 1.25 in Moderate crowds $$
March in San Juan is typically mild to warm, with an average high near 82.0°F and low near 56.3°F at the selected NOAA reference station. The normal monthly rainfall is about 1.25 inches across 4.7 measurable-rain days, so visitors should expect limited rain interruption. Moderate crowds and $$ – moderate conditions shape the overall trade-off. The month is strongest for sightseeing, families, couples, especially when the plan emphasizes sightseeing, history, road trip. Use the scores as a consistent comparison tool and check short-range forecasts and official access alerts before departure.
Why Visit
Choose March for sightseeing, history, road trip, a 9.5/10 weather score, and moderate crowds relative to this destination's busier periods.
Things to Know
Conditions can change quickly; confirm forecasts, operating hours and reservation requirements.
April in San Juan
88.60° / 62.70°F 1.02 in Light crowds $$
April in San Juan is typically warm to hot, with an average high near 88.6°F and low near 62.7°F at the selected NOAA reference station. The normal monthly rainfall is about 1.02 inches across 4.1 measurable-rain days, so visitors should expect limited rain interruption. Light crowds and $$ – moderate conditions shape the overall trade-off. The month is strongest for sightseeing, families, couples, especially when the plan emphasizes sightseeing, history, road trip. Use the scores as a consistent comparison tool and check short-range forecasts and official access alerts before departure.
Why Visit
Choose April for sightseeing, history, road trip, a 9.1/10 weather score, and light crowds relative to this destination's busier periods.
Things to Know
Conditions can change quickly; confirm forecasts, operating hours and reservation requirements.
May in San Juan
93.80° / 69.90°F 2.85 in Light crowds $$
May in San Juan is typically warm to hot, with an average high near 93.8°F and low near 69.9°F at the selected NOAA reference station. The normal monthly rainfall is about 2.85 inches across 4.5 measurable-rain days, so visitors should expect limited rain interruption. Light crowds and $$ – moderate conditions shape the overall trade-off. The month is strongest for sightseeing, families, couples, especially when the plan emphasizes sightseeing, history, road trip. Use the scores as a consistent comparison tool and check short-range forecasts and official access alerts before departure.
Why Visit
Choose May for sightseeing, history, road trip, a 7.6/10 weather score, and light crowds relative to this destination's busier periods.
Things to Know
Plan strenuous activity early, carry extra water and allow for intense afternoon heat.
June in San Juan
98.10° / 74.40°F 2.76 in Light crowds $$
June in San Juan is typically warm to hot, with an average high near 98.1°F and low near 74.4°F at the selected NOAA reference station. The normal monthly rainfall is about 2.76 inches across 4.0 measurable-rain days, so visitors should expect limited rain interruption. Light crowds and $$ – moderate conditions shape the overall trade-off. The month is strongest for sightseeing, families, couples, especially when the plan emphasizes sightseeing, history, road trip. Use the scores as a consistent comparison tool and check short-range forecasts and official access alerts before departure.
Why Visit
Choose June for sightseeing, history, road trip, a 6.6/10 weather score, and light crowds relative to this destination's busier periods.
Things to Know
Plan strenuous activity early, carry extra water and allow for intense afternoon heat.
July in San Juan
99.00° / 75.10°F 2.04 in Light crowds $$
July in San Juan is typically warm to hot, with an average high near 99.0°F and low near 75.1°F at the selected NOAA reference station. The normal monthly rainfall is about 2.04 inches across 3.8 measurable-rain days, so visitors should expect limited rain interruption. Light crowds and $$ – moderate conditions shape the overall trade-off. The month is strongest for sightseeing, families, couples, especially when the plan emphasizes sightseeing, history, road trip. Use the scores as a consistent comparison tool and check short-range forecasts and official access alerts before departure.
Why Visit
Choose July for sightseeing, history, road trip, a 6.6/10 weather score, and light crowds relative to this destination's busier periods.
Things to Know
Plan strenuous activity early, carry extra water and allow for intense afternoon heat.
August in San Juan
99.40° / 75.10°F 1.34 in Light crowds $$
August in San Juan is typically warm to hot, with an average high near 99.4°F and low near 75.1°F at the selected NOAA reference station. The normal monthly rainfall is about 1.34 inches across 3.9 measurable-rain days, so visitors should expect limited rain interruption. Light crowds and $$ – moderate conditions shape the overall trade-off. The month is strongest for sightseeing, families, couples, especially when the plan emphasizes sightseeing, history, road trip. Use the scores as a consistent comparison tool and check short-range forecasts and official access alerts before departure.
Why Visit
Choose August for sightseeing, history, road trip, a 6.6/10 weather score, and light crowds relative to this destination's busier periods.
Things to Know
Plan strenuous activity early, carry extra water and allow for intense afternoon heat.
September in San Juan
93.90° / 71.00°F 5.12 in Light crowds $$
September in San Juan is typically warm to hot, with an average high near 93.9°F and low near 71.0°F at the selected NOAA reference station. The normal monthly rainfall is about 5.12 inches across 7.6 measurable-rain days, so visitors should expect occasional rain. Light crowds and $$ – moderate conditions shape the overall trade-off. The month is strongest for sightseeing, families, couples, especially when the plan emphasizes sightseeing, history, road trip. Use the scores as a consistent comparison tool and check short-range forecasts and official access alerts before departure.
Why Visit
Choose September for sightseeing, history, road trip, a 6.8/10 weather score, and light crowds relative to this destination's busier periods.
Things to Know
Plan strenuous activity early, carry extra water and allow for intense afternoon heat.
October in San Juan
88.40° / 63.40°F 2.46 in Light crowds $$
October in San Juan is typically warm to hot, with an average high near 88.4°F and low near 63.4°F at the selected NOAA reference station. The normal monthly rainfall is about 2.46 inches across 4.8 measurable-rain days, so visitors should expect limited rain interruption. Light crowds and $$ – moderate conditions shape the overall trade-off. The month is strongest for sightseeing, families, couples, especially when the plan emphasizes sightseeing, history, road trip. Use the scores as a consistent comparison tool and check short-range forecasts and official access alerts before departure.
Why Visit
Choose October for sightseeing, history, road trip, a 8.8/10 weather score, and light crowds relative to this destination's busier periods.
Things to Know
Conditions can change quickly; confirm forecasts, operating hours and reservation requirements.
November in San Juan
78.70° / 54.30°F 1.10 in Light crowds $$
November in San Juan is typically mild to warm, with an average high near 78.7°F and low near 54.3°F at the selected NOAA reference station. The normal monthly rainfall is about 1.10 inches across 4.9 measurable-rain days, so visitors should expect limited rain interruption. Light crowds and $$ – moderate conditions shape the overall trade-off. The month is strongest for sightseeing, families, couples, especially when the plan emphasizes sightseeing, history, road trip. Use the scores as a consistent comparison tool and check short-range forecasts and official access alerts before departure.
Why Visit
Choose November for sightseeing, history, road trip, a 9.5/10 weather score, and light crowds relative to this destination's busier periods.
Things to Know
Conditions can change quickly; confirm forecasts, operating hours and reservation requirements.
December in San Juan
71.90° / 46.60°F 0.80 in Moderate crowds $$
December in San Juan is typically mild to warm, with an average high near 71.9°F and low near 46.6°F at the selected NOAA reference station. The normal monthly rainfall is about 0.80 inches across 6.0 measurable-rain days, so visitors should expect limited rain interruption. Moderate crowds and $$ – moderate conditions shape the overall trade-off. The month is strongest for sightseeing, families, couples, especially when the plan emphasizes sightseeing, history, road trip. Use the scores as a consistent comparison tool and check short-range forecasts and official access alerts before departure.
Why Visit
Choose December for sightseeing, history, road trip, a 9.5/10 weather score, and moderate crowds relative to this destination's busier periods.
Things to Know
Conditions can change quickly; confirm forecasts, operating hours and reservation requirements.
Compare Months
Compare Destinations
Choose two or three destination-and-month combinations to compare weather, crowds, value, comfort and traveler fit side by side.
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Nearby Destinations
Mesquite 7.6$$$2 miles
Roma 8.5$$4 miles
Rio Grande City 8.5$$8 miles
Falcon State Park 8.6$17 miles
Bentsen-Rio Grande Valley State Park 8.7$38 miles
Zapata 8.5$$39 miles
How Scores Are Calculated
Data source: Catalog: https://www.traveltexas.com/cities-and-regions/texas-cities/ | Coordinates: 2025 U.S. Census Gazetteer GEOID 4865532 | Climate: NOAA 1991-2020 normals, USC00417622 https://www.ncei.noaa.gov/data/normals-monthly/1991-2020/access/USC00417622.csv, nearest complete station 8.6 mi | Humidity: NASA POWER 2001-2020 climatology https://power.larc.nasa.gov/api/temporal/climatology/point | Daylight: astronomical calculation at mid-month | Derived scores: TExploreVibe v2 documented methodology | Image: https://commons.wikimedia.org/wiki/File:TXMap-doton-SanJuan.PNG (CC BY-SA 3.0; The original uploader was Seth Ilys at English Wikipedia .) Last updated: 2026-08-11
Read the complete scoring methodology →