Average annual temperature is 16.3 °C
Absolute maximum temperature: 43.0 °C
Absolute minimum temperature: -0.5 °C
Number of sunny days: 263 days
Number of rainy days: 102 days
Look at detailed online map of San Joaquin County
* Weather data for San Joaquin County United States is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 17.2 | 18.8 | 19.9 | 32.2 | 33.6 | 39.7 | 43.0 | 41.2 | 34.5 | 35.3 | 27.0 | 19.1 |
| Average daytime temperature (°C) | 13.7 | 13.9 | 15.0 | 22.4 | 25.8 | 30.3 | 37.1 | 36.4 | 30.1 | 27.0 | 19.9 | 15.8 |
| Average temperature (°C) | 8.8 | 7.8 | 9.7 | 14.5 | 17.4 | 20.6 | 26.2 | 26.2 | 21.7 | 19.0 | 12.9 | 10.4 |
| Average night temperature (°C) | 5.5 | 3.3 | 5.8 | 8.7 | 11.5 | 13.7 | 17.3 | 18.5 | 15.4 | 12.7 | 7.2 | 6.5 |
| Absolute minimum temperature (°C) | -0.5 | -0.3 | 1.2 | 2.6 | 7.7 | 10.9 | 11.9 | 13.8 | 13.0 | 5.4 | 1.4 | 1.1 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.9 | 10.8 | 12.0 | 13.2 | 14.2 | 14.7 | 14.5 | 13.6 | 12.4 | 11.2 | 10.1 | 9.6 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 5.6 | 7.3 | 7.5 | 11.5 | 11.6 | 13.0 | 13.4 | 12.3 | 10.9 | 9.7 | 8.2 | 6.0 |
| Precipitation (mm) | 222 | 88 | 224 | 4 | 27 | 0 | 0 | 9 | 19 | 5 | 44 | 117 |
| Sunny days | 12 | 16 | 9 | 25 | 23 | 29 | 31 | 28 | 26 | 26 | 22 | 16 |
| Rainy days | 19 | 12 | 22 | 5 | 8 | 1 | 0 | 3 | 4 | 5 | 8 | 15 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit San Joaquin County during the most sunny months:
The largest precipitation sum in San Joaquin County is at