San Jacinto (CA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit San Jacinto.
Climate overview of San Jacinto
San Jacinto, California, United States of America, experiences significant temperature variation throughout the year. Summers bring daytime highs of 37°C (99°F) in August, while winters cool to 18°C (64°F) in December.
With just 247 mm (9.7 in) of annual rainfall, the city has a dry, desert-like climate.
San Jacinto Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in San Jacinto - and find the best time to visit.
Monthly Temperature in San Jacinto
Depending on the time of the year, temperatures range from very hot to pleasant in San Jacinto. Average daytime temperatures reach a very hot 37°C (99°F) in August. In December, the coolest month of the year, temperatures drop to a pleasant 18°C (64°F).
At night, temperatures range from around 18°C (64°F) in August to 5°C (41°F) in December.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in San Jacinto
San Jacinto has a dry climate with very low precipitation, averaging 247 mm (9.7 in) of rainfall annually. San Jacinto can be quite wet during December, receiving approximately 71 mm (2.8 in) of precipitation over 9 rainy days.
In contrast, during the driest month (June), you will experience much drier conditions, with 0.4 mm (0.02 in) of precipitation spread across 0 rainy days. For more details, please visit our San Jacinto Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit San Jacinto
Each month is rated for comfortable sightseeing weather — mild temperatures and low rainfall. Tap a month for its full averages; your ideal time may differ for a beach or winter trip (see below).
- Best overall: January, February, March, April, May, October and November
- Warmest weather: July and August
- Fewest rainy days: June, July, August and September
- Climate seasons: very little rainfall for most of the year, with very hot summers and pleasant winters
Frequently asked questions about the climate in San Jacinto
What is the best time to visit San Jacinto?
January, February, March, April, May, October and November typically offer the most optimal weather in San Jacinto. In contrast, July, August and September tend to have less optimal conditions. San Jacinto has very little rainfall for most of the year, with very hot summers and pleasant winters.
What temperatures can I expect in San Jacinto?
Daytime highs range from 18°C (64°F) in December to 37°C (99°F) in August. Nighttime lows range from 5°C (41°F) to 18°C (64°F). Temperatures vary considerably through the year.
How much rain does San Jacinto get?
Annual rainfall is around 247 mm (9.7 in). December is the wettest month with 71 mm (2.8 in), while June is the driest with 0.4 mm (0.02 in).
San Jacinto 3-Day Forecast
San Jacinto (CA) 3-Day Forecast
San Jacinto on the map
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