Discover the best time of year, based on historical climate, temperature, and precipitation.
The best weather in Grinnell is from June, August, September. — consistent weather climate
🌦Humid
| Score | 12 | 20 | 21 | 51 | 76 | 80 | 80 | 87 | 90 | 68 | 29 | 14 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Climate | Polar | Polar | Cold | Cold | Cool & rainy | Humid | Humid | Pleasant | Pleasant | Mild | Cold | Cold |
| Temperature | -9–-1°C | -8–2°C | 0–11°C | 5–16°C | 12–22°C | 18–28°C | 19–29°C | 19–28°C | 15–25°C | 8–18°C | 1–10°C | -4–4°C |
| Feels like | -15–-7°C | -14–-3°C | -5–6°C | 0–13°C | 9–21°C | 18–30°C | 20–31°C | 19–30°C | 14–25°C | 5–15°C | -3–6°C | -9–-1°C |
| Precipitation | 51mm 9 days | 24mm 5 days | 80mm 9 days | 79mm 8 days | 105mm 11 days | 106mm 8 days | 82mm 7 days | 58mm 5 days | 50mm 5 days | 92mm 6 days | 65mm 5 days | 48mm 7 days |
| Sunshine | 4.9h ☀︎ 51% | 8.0h ☀︎ 75% | 7.7h ☀︎ 64% | 9.2h ☀︎ 68% | 9.8h ☀︎ 67% | 12.3h ☀︎ 81% | 12.5h ☀︎ 84% | 11.8h ☀︎ 85% | 10.5h ☀︎ 84% | 8.5h ☀︎ 76% | 7.1h ☀︎ 72% | 5.4h ☀︎ 58% |
| Wind | NW · 24 km/h | W · 25 km/h | N · 26 km/h | W · 28 km/h | SE · 24 km/h | S · 21 km/h | SW · 18 km/h | S · 19 km/h | S · 20 km/h | W · 24 km/h | SW · 24 km/h | SW · 23 km/h |
| Humidity (%) | 81% | 69% | 65% | 61% | 65% | 65% | 73% | 71% | 66% | 61% | 67% | 72% |
| Day length | 9.5h | 10.6h | 12.0h | 13.4h | 14.6h | 15.2h | 14.8h | 13.8h | 12.5h | 11.1h | 9.8h | 9.2h |