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Weather & Climate
Cass County, Iowa, United States
Overview
Climate data and monthly weather averages for Cass County.
Key Metrics
Annual Avg
9.8°C
Summer Avg
23.2°C
Winter Avg
-4.6°C
Record High
41.8°C
Record Low
-34.6°C
Annual Precipitation
843.6 mm
Avg Humidity
74%
Summer Humidity
70%
Winter Humidity
83%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 12.5° | -5.9° | -34.6° | 19.8 | 83% | 63 | 63.5 |
| Feb | 19.1° | -4.3° | -25.8° | 25.2 | 81% | 86 | 58.9 |
| Mar | 27.9° | 3.1° | -24.1° | 43.4 | 75% | 120 | 58.4 |
| Apr | 30.6° | 10° | -8.8° | 82.5 | 70% | 146 | 64.3 |
| May | 35.1° | 16.1° | -1.7° | 122.8 | 72% | 176 | 57.5 |
| Jun | 38.6° | 21.9° | 5.6° | 123.3 | 73% | 190 | 50.5 |
| Jul | 41.8° | 24.5° | 9.8° | 85.6 | 69% | 200 | 37.9 |
| Aug | 40.3° | 23.1° | 7.2° | 112.5 | 69% | 173 | 40.3 |
| Sep | 37.4° | 18.6° | 2.1° | 84.9 | 69% | 137 | 47.7 |
| Oct | 30.9° | 10.4° | -6.2° | 70.7 | 71% | 99 | 58.2 |
| Nov | 24.8° | 3.3° | -14.9° | 36 | 76% | 66 | 58.6 |
| Dec | 17.7° | -3.5° | -24.9° | 36.9 | 84% | 53 | 68.7 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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