Fairfield, ID
Climate overview — based on NOAA 1991-2020 normals from FAIRFIELD RS, ID US.
Year-round temperatures (°F)
Climate summary
Fairfield has an annual average temperature of 42.1°F with about 14.6 inches of precipitation per year. The warmest month is July (average high 84.0°F), and the coldest is January (average low 9.2°F). January is typically the wettest month (2.11 in) and August the driest (0.35 in).
Best time to visit Fairfield
Full guide →Climate change signal
All-time records →45 of 366 (12.3%) 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.
| 1940s | 17 | |
| 1950s | 35 | |
| 1960s | 52 | |
| 1970s | 53 | |
| 1980s | 66 | |
| 1990s | 60 | |
| 2000s | 32 | |
| 2010s | 27 | |
| 2020s | 24 |
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 | 27.3°F | 9.2°F | 18.3°F | 2.11 in | — | — |
| February | 31.3°F | 11.7°F | 21.5°F | 1.50 in | — | — |
| March | 40.7°F | 20.6°F | 30.7°F | 1.61 in | — | — |
| April | 53.8°F | 30.1°F | 42.0°F | 1.11 in | — | — |
| May | 64.5°F | 38.1°F | 51.3°F | 1.60 in | — | — |
| June | 73.0°F | 43.3°F | 58.2°F | 0.85 in | — | — |
| July | 84.0°F | 50.1°F | 67.0°F | 0.38 in | — | — |
| August | 82.8°F | 48.3°F | 65.5°F | 0.35 in | — | — |
| September | 73.8°F | 39.5°F | 56.7°F | 0.70 in | — | — |
| October | 59.0°F | 30.1°F | 44.5°F | 0.97 in | — | — |
| November | 41.7°F | 20.3°F | 31.0°F | 1.39 in | — | — |
| December | 28.0°F | 10.0°F | 19.0°F | 1.98 in | — | — |
Climate twins of Fairfield
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).