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Weather & Climate
Onawa, Iowa, United States
Overview
Climate data and monthly weather averages for Onawa.
Key Metrics
Annual Avg
9.9°C
Summer Avg
23.7°C
Winter Avg
-4.6°C
Record High
43.9°C
Record Low
-32.2°C
Annual Precipitation
768.1 mm
Avg Humidity
72%
Summer Humidity
67%
Winter Humidity
81%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 13.8° | -5.8° | -32.2° | 17.7 | 82% | 62 | 65.5 |
| Feb | 20.4° | -4.2° | -25.5° | 22.1 | 78% | 87 | 60.8 |
| Mar | 30.6° | 3.1° | -23.8° | 41.9 | 73% | 119 | 62.1 |
| Apr | 32.5° | 10° | -9.3° | 79.2 | 68% | 149 | 75.7 |
| May | 35.7° | 16.2° | -3.8° | 111.3 | 69% | 179 | 57 |
| Jun | 41.1° | 22.3° | 6.9° | 114.9 | 70% | 194 | 54.4 |
| Jul | 43.9° | 25.2° | 10.2° | 76.6 | 65% | 206 | 40.2 |
| Aug | 41° | 23.6° | 7.7° | 101.1 | 65% | 174 | 45.2 |
| Sep | 38.3° | 18.9° | 2.4° | 82.5 | 66% | 134 | 49.3 |
| Oct | 33.1° | 10.4° | -8.4° | 58.9 | 69% | 98 | 60.1 |
| Nov | 25.3° | 3.2° | -14.2° | 30.6 | 74% | 66 | 60.2 |
| Dec | 14.8° | -3.7° | -26.5° | 31.3 | 82% | 51 | 67.4 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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