Fairfield, CA
Climate overview — based on NOAA 1991-2020 normals from FAIRFIELD, CA US.
Year-round temperatures (°F)
Climate summary
Fairfield has an annual average temperature of 61.7°F with about 24.5 inches of precipitation per year. The warmest month is July (average high 89.6°F), and the coldest is December (average low 40.1°F). December is typically the wettest month (5.40 in) and July the driest (0.00 in).
Best time to visit Fairfield
Full guide →Climate change signal
All-time records →56 of 366 (15.3%) of Fairfield's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.
| 1950s | 70 | |
| 1960s | 35 | |
| 1970s | 16 | |
| 1980s | 68 | |
| 1990s | 33 | |
| 2000s | 66 | |
| 2010s | 47 | |
| 2020s | 31 |
Bars: number of all-time daily heat records still standing that were set in each decade.
Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | 56.6°F | 40.4°F | 48.5°F | 4.68 in | — | 10 |
| February | 61.6°F | 42.9°F | 52.2°F | 4.97 in | — | 10 |
| March | 66.4°F | 45.4°F | 55.9°F | 3.31 in | — | 9 |
| April | 71.3°F | 47.9°F | 59.6°F | 1.47 in | — | 5 |
| May | 77.8°F | 52.2°F | 65.0°F | 0.74 in | — | 3 |
| June | 85.4°F | 56.1°F | 70.8°F | 0.19 in | — | 1 |
| July | 89.6°F | 57.9°F | 73.8°F | 0.00 in | — | 0 |
| August | 89.2°F | 58.0°F | 73.6°F | 0.03 in | — | 0 |
| September | 86.9°F | 56.6°F | 71.7°F | 0.08 in | — | 1 |
| October | 78.2°F | 52.3°F | 65.2°F | 1.11 in | — | 3 |
| November | 65.6°F | 45.2°F | 55.4°F | 2.55 in | — | 7 |
| December | 56.7°F | 40.1°F | 48.4°F | 5.40 in | — | 10 |
Climate twins of Fairfield
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).