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Weather & Climate
Postville, Iowa, United States
Overview
Climate data and monthly weather averages for Postville.
Key Metrics
Annual Avg
7.9°C
Summer Avg
21.3°C
Winter Avg
-6.8°C
Record High
40°C
Record Low
-36.2°C
Annual Precipitation
944.8 mm
Avg Humidity
79%
Summer Humidity
76%
Winter Humidity
87%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 9.7° | -8.4° | -36.2° | 27.3 | 88% | 56 | 57.7 |
| Feb | 18.4° | -6.8° | -29° | 31.9 | 86% | 81 | 78.2 |
| Mar | 25.3° | 0.8° | -28.4° | 50.5 | 80% | 119 | 65.7 |
| Apr | 28.4° | 7.9° | -12.5° | 97.2 | 75% | 138 | 73.2 |
| May | 32.9° | 14.4° | -3.7° | 118.7 | 76% | 170 | 53.1 |
| Jun | 37.1° | 20.2° | 4.5° | 147 | 78% | 182 | 48.9 |
| Jul | 40° | 22.6° | 8.1° | 106.6 | 76% | 194 | 37.4 |
| Aug | 37.8° | 21.2° | 5.5° | 102.3 | 74% | 166 | 39.8 |
| Sep | 34.1° | 17° | -0.2° | 98.7 | 74% | 127 | 50.3 |
| Oct | 28.9° | 8.9° | -5.4° | 73.8 | 76% | 86 | 59.2 |
| Nov | 22.6° | 1.8° | -16.4° | 46.2 | 81% | 56 | 57.4 |
| Dec | 18.8° | -5.3° | -32.3° | 44.6 | 88% | 42 | 60 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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