Discover the best time of year, based on historical climate, temperature, and precipitation.
The best weather in Helena is from July, August, September. — consistent weather climate
🌥Mild
| Score | 15 | 14 | 22 | 31 | 63 | 87 | 95 | 95 | 89 | 44 | 23 | 14 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Climate | Polar | Polar | Cold | Cold | Cold | Mild | Pleasant | Pleasant | Mild | Cold | Cold | Polar |
| Temperature | -10–0°C | -11–0°C | -6–6°C | -1–12°C | 4–17°C | 9–23°C | 13–29°C | 13–28°C | 8–22°C | 1–13°C | -5–5°C | -9–0°C |
| Feels like | -15–-4°C | -16–-4°C | -10–2°C | -5–8°C | 1–15°C | 7–22°C | 11–27°C | 11–26°C | 5–19°C | -2–10°C | -10–1°C | -13–-4°C |
| Precipitation | 21mm 7 days | 28mm 10 days | 28mm 8 days | 44mm 10 days | 58mm 11 days | 51mm 7 days | 18mm 3 days | 20mm 3 days | 36mm 6 days | 38mm 8 days | 25mm 6 days | 26mm 8 days |
| Sunshine | 6.2h ☀︎ 68% | 6.6h ☀︎ 64% | 9.3h ☀︎ 78% | 10.1h ☀︎ 74% | 11.1h ☀︎ 74% | 12.8h ☀︎ 81% | 14.1h ☀︎ 92% | 12.4h ☀︎ 88% | 10.3h ☀︎ 82% | 8.3h ☀︎ 76% | 6.7h ☀︎ 71% | 5.3h ☀︎ 61% |
| Wind | SW · 13 km/h | SW · 15 km/h | SW · 15 km/h | W · 17 km/h | W · 16 km/h | W · 17 km/h | W · 16 km/h | W · 16 km/h | W · 16 km/h | SW · 15 km/h | SW · 14 km/h | SW · 13 km/h |
| Humidity (%) | 69% | 66% | 62% | 57% | 57% | 52% | 42% | 44% | 53% | 61% | 66% | 67% |
| Day length | 9.1h | 10.3h | 12.0h | 13.6h | 15.0h | 15.8h | 15.4h | 14.1h | 12.5h | 10.9h | 9.4h | 8.6h |