Fairfield, California Climate Climate data for Fairfield, California

| Month_ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec_ | Year_ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average low °F (°C) | 37.6 , (3.1) | 41.1 , (5.1) | 43.3 , (6.3) | 45.8 , (7.7) | 50.3 , (10.2) | 54.0 , (12.2) | 56.0 , (13.3) | 56.0 , (13.3) | 54.5 , (12.5) | 49.8 , (9.9) | 42.7 , (5.9) | 37.9 , (3.3) | 47.4 , (8.6) |
| Record low °F (°C) | 18 , (−8) | 24 , (−4) | 20 , (−7) | 29 , (−2) | 35 , (2) | 31 , (−1) | 40 , (4) | 40 , (4) | 39 , (4) | 32 , (0) | 21 , (−6) | 15 , (−9) | 15 , (−9) |
| Precipitation inches (mm) | 4.77 , (121.2) | 4.04 , (102.6) | 3.09 , (78.5) | 1.39 , (35.3) | 0.55 , (14) | 0.17 , (4.3) | 0.02 , (0.5) | 0.06 , (1.5) | 0.24 , (6.1) | 1.30 , (33) | 2.75 , (69.9) | 4.30 , (109.2) | 22.68 , (576.1) |
| Avg. precipitation days (≥ 0.01 in) | 11 | 10 | 9 | 6 | 3 | 1 | 0 | 0 | 1 | 3 | 7 | 10 | 60 |