Discover the best time of year, based on historical climate, temperature, and precipitation.
The best weather in Portsmouth is from May, August, September. — consistent weather climate
🌦Humid
| Score | 12 | 13 | 13 | 31 | 82 | 79 | 79 | 80 | 83 | 58 | 24 | 10 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Climate | Polar | Polar | Cold | Cold | Mild | Humid | Humid | Humid | Humid | Cool & rainy | Cold | Cold |
| Temperature | -6–2°C | -7–3°C | -3–6°C | 3–12°C | 9–19°C | 14–24°C | 18–27°C | 18–26°C | 14–23°C | 8–16°C | 2–10°C | -3–4°C |
| Feels like | -12–-3°C | -12–-1°C | -8–2°C | -1–9°C | 7–18°C | 14–24°C | 19–30°C | 19–28°C | 14–23°C | 6–15°C | -2–6°C | -8–0°C |
| Precipitation | 100mm 11 days | 87mm 10 days | 103mm 10 days | 113mm 11 days | 70mm 8 days | 90mm 10 days | 99mm 9 days | 96mm 8 days | 87mm 7 days | 118mm 10 days | 86mm 8 days | 125mm 11 days |
| Sunshine | 6.0h ☀︎ 63% | 6.9h ☀︎ 66% | 8.0h ☀︎ 67% | 8.0h ☀︎ 60% | 10.1h ☀︎ 68% | 11.3h ☀︎ 74% | 11.6h ☀︎ 77% | 11.0h ☀︎ 79% | 9.3h ☀︎ 75% | 7.4h ☀︎ 68% | 6.6h ☀︎ 68% | 5.6h ☀︎ 62% |
| Wind | W · 20 km/h | W · 20 km/h | W · 21 km/h | W · 20 km/h | S · 18 km/h | S · 17 km/h | SW · 15 km/h | SW · 15 km/h | SW · 16 km/h | W · 18 km/h | W · 19 km/h | W · 19 km/h |
| Humidity (%) | 69% | 70% | 68% | 70% | 71% | 74% | 76% | 77% | 78% | 78% | 74% | 75% |
| Day length | 9.4h | 10.5h | 12.0h | 13.4h | 14.7h | 15.3h | 15.0h | 13.9h | 12.5h | 11.0h | 9.7h | 9.1h |