POSTVILLE, IA US
GHCN ID: USC00136766 · IA, US · 355.1 m elevation · Records 1893-2026 (133 years)
Primary station for Castalia, IA.
Monthly climate normals (1991-2020)
| Month | High | Low | Mean | Precip | Snow |
|---|---|---|---|---|---|
| January | 25.7°F | 7.4°F | 16.6°F | 1.12 in | 12.0 in |
| February | 29.9°F | 10.5°F | 20.2°F | 1.21 in | 10.4 in |
| March | 43.0°F | 22.4°F | 32.7°F | 2.09 in | 5.0 in |
| April | 57.5°F | 34.0°F | 45.8°F | 4.14 in | 1.6 in |
| May | 69.4°F | 46.9°F | 58.2°F | 4.99 in | — |
| June | 79.0°F | 57.8°F | 68.4°F | 5.88 in | — |
| July | 82.8°F | 60.9°F | 71.9°F | 4.52 in | — |
| August | 80.8°F | 58.2°F | 69.5°F | 4.36 in | — |
| September | 74.0°F | 49.2°F | 61.6°F | 3.96 in | — |
| October | 60.6°F | 37.0°F | 48.8°F | 3.00 in | 0.1 in |
| November | 44.7°F | 25.5°F | 35.1°F | 2.10 in | 2.7 in |
| December | 31.4°F | 14.0°F | 22.7°F | 1.57 in | 8.0 in |