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Weather & Climate
Fairfield, Iowa, United States
Overview
Climate data and monthly weather averages for Fairfield.
Key Metrics
Annual Avg
10.6°C
Summer Avg
23.7°C
Winter Avg
-3.4°C
Record High
43.5°C
Record Low
-35.7°C
Annual Precipitation
928.8 mm
Avg Humidity
76%
Summer Humidity
72%
Winter Humidity
83%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 17.5° | -4.8° | -35.7° | 29.8 | 83% | 57 | 62.4 |
| Feb | 22.4° | -3.2° | -25.3° | 39.8 | 81% | 80 | 58.6 |
| Mar | 25.6° | 3.9° | -21.5° | 58.3 | 77% | 117 | 61.1 |
| Apr | 29.3° | 10.9° | -8.2° | 89.7 | 73% | 144 | 56.6 |
| May | 36.1° | 16.9° | -1° | 120 | 75% | 174 | 59 |
| Jun | 39.6° | 22.6° | 7.1° | 133.5 | 75% | 187 | 45.9 |
| Jul | 43.5° | 24.9° | 10° | 93.9 | 71% | 196 | 38.3 |
| Aug | 40.5° | 23.7° | 7.4° | 105.7 | 70% | 172 | 36.6 |
| Sep | 40.2° | 19.3° | 1.6° | 86.1 | 71% | 137 | 48.1 |
| Oct | 34.5° | 11.4° | -4.8° | 76.6 | 73% | 95 | 55.2 |
| Nov | 25.1° | 4.4° | -14.1° | 48.6 | 78% | 63 | 59.5 |
| Dec | 21.6° | -2.1° | -24.5° | 46.8 | 84% | 48 | 70.3 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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