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Weather & Climate
Clear Lake, Iowa, United States
Overview
Climate data and monthly weather averages for Clear Lake.
Key Metrics
Annual Avg
8.1°C
Summer Avg
21.5°C
Winter Avg
-6.6°C
Record High
41°C
Record Low
-36.4°C
Annual Precipitation
935.5 mm
Avg Humidity
78%
Summer Humidity
76%
Winter Humidity
86%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 10.4° | -8.2° | -36.4° | 24.5 | 87% | 58 | 62.4 |
| Feb | 17.4° | -6.5° | -28.6° | 31.4 | 85% | 83 | 77.7 |
| Mar | 25.6° | 1.1° | -28.4° | 50.5 | 78% | 119 | 64 |
| Apr | 30.1° | 8.2° | -12.9° | 98.1 | 74% | 143 | 78.9 |
| May | 33.9° | 14.8° | -3.9° | 123.7 | 75% | 172 | 52.8 |
| Jun | 37.3° | 20.5° | 4.3° | 145.5 | 77% | 185 | 51.3 |
| Jul | 41° | 22.8° | 7.7° | 106.3 | 76% | 200 | 36.6 |
| Aug | 37.9° | 21.2° | 5.7° | 101.7 | 75% | 170 | 44.6 |
| Sep | 33.6° | 17.2° | 0.4° | 97.8 | 73% | 129 | 50.7 |
| Oct | 28.4° | 9° | -6.2° | 72.5 | 74% | 89 | 59.4 |
| Nov | 24.2° | 1.9° | -17.1° | 42.3 | 79% | 58 | 60.6 |
| Dec | 18.2° | -5.2° | -30.7° | 41.2 | 87% | 45 | 63.6 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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