San Juan, TX weather
Today, hourly and 7-day forecast, sunrise and sunset, and the normal climate month by month
Weather in San Juan now
Loading the National Weather Service forecast…
San Juan weather by the hour
San Juan weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of San Juan.
This week in San Juan
Sunrise, sunset and moon in San Juan
What is the weather usually like in San Juan?
Köppen climate classification, calculated from the 1991–2020 normals
- Augustwarmest month · 99°F average high
- Januarycoldest month · 45°F average low
- 22.5 inprecipitation per year · 571 mm
- 0.1 insnowfall per year · 0 cm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit San Juan: February–March and November–December, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station RIO GRANDE CITY, TX US (USC00417622), adjusted for the elevation of San Juan.
San Juan weather month by month
Sunrise and sunset in San Juan through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:23 AM | 6:06 PM | 10 h 42 min |
| February | 7:10 AM | 6:29 PM | 11 h 19 min |
| March | 7:43 AM | 7:45 PM | 12 h 2 min |
| April | 7:10 AM | 8:00 PM | 12 h 50 min |
| May | 6:47 AM | 8:16 PM | 13 h 29 min |
| June | 6:41 AM | 8:31 PM | 13 h 49 min |
| July | 6:51 AM | 8:32 PM | 13 h 40 min |
| August | 7:06 AM | 8:13 PM | 13 h 6 min |
| September | 7:20 AM | 7:41 PM | 12 h 20 min |
| October | 7:33 AM | 7:08 PM | 11 h 34 min |
| November | 6:53 AM | 5:47 PM | 10 h 53 min |
| December | 7:14 AM | 5:47 PM | 10 h 32 min |
Times for the 15th of each month, local time (America/Chicago).
What is the weather like in San Juan?
San Juan has a hot semi-arid climate. The warmest month is August, with an average high of 99°F (37°C), and the coldest is January, with average lows of 45°F (7°C).
It gets about 22.5 inches (571 mm) of precipitation a year. The wettest month is September and the driest is January.
The best time to visit San Juan is February–March and November–December. The live forecast on this page comes from the National Weather Service and the climate averages from NOAA’s 1991–2020 U.S. Climate Normals.
More about San Juan
Weather in towns near San Juan
Questions about the weather in San Juan
What is the hottest month in San Juan?
August, with an average high of 99°F (37°C).
What is the coldest month in San Juan?
January, with an average low of 45°F (7°C).
How much does it rain in San Juan?
About 22.5 inches (571 mm) a year; the wettest month is September.
Does it snow in San Juan?
Rarely: less than an inch in an average year.
When is the best time to visit San Juan?
February–March and November–December, when temperatures are most pleasant and rainy days are fewer.
What climate does San Juan have?
Hot semi-arid (Köppen BSh).
What is the weather like in San Juan in November?
Highs average 79°F and lows 54°F, with about 1.1 inches of precipitation.
What time is sunrise in San Juan?
Around 6:53 AM in mid-November, and sunset around 5:47 PM. Today’s exact times are shown above.
Where does this San Juan weather forecast come from?
From the National Weather Service (NOAA), the official U.S. weather agency, for the exact coordinates of San Juan.
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