Discover the best time of year, based on historical climate, temperature, and precipitation.
The best weather in South Portland is from May, June, September. — consistent weather climate
🌦Humid
| Score | 11 | 14 | 14 | 28 | 79 | 80 | 73 | 79 | 82 | 61 | 29 | 10 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Climate | Polar | Polar | Cold | Cold | Mild | Humid | Humid | Humid | Humid | Cool & rainy | Cold | Cold |
| Temperature | -6–2°C | -7–3°C | -2–7°C | 3–11°C | 9–18°C | 15–23°C | 18–26°C | 17–25°C | 14–22°C | 8–16°C | 2–10°C | -3–5°C |
| Feels like | -11–-2°C | -12–-2°C | -6–4°C | -1–8°C | 6–17°C | 14–24°C | 19–29°C | 18–27°C | 13–22°C | 6–15°C | -2–7°C | -7–1°C |
| Precipitation | 109mm 11 days | 68mm 9 days | 115mm 10 days | 123mm 12 days | 79mm 7 days | 91mm 9 days | 137mm 11 days | 96mm 10 days | 95mm 7 days | 100mm 9 days | 87mm 7 days | 143mm 11 days |
| Sunshine | 5.3h ☀︎ 57% | 6.8h ☀︎ 64% | 8.0h ☀︎ 67% | 7.6h ☀︎ 56% | 10.7h ☀︎ 73% | 10.9h ☀︎ 71% | 10.8h ☀︎ 72% | 10.4h ☀︎ 75% | 9.4h ☀︎ 76% | 7.3h ☀︎ 67% | 7.0h ☀︎ 72% | 5.3h ☀︎ 59% |
| Wind | NW · 19 km/h | NW · 20 km/h | W · 21 km/h | NW · 20 km/h | SW · 18 km/h | SW · 17 km/h | SW · 15 km/h | SW · 15 km/h | W · 16 km/h | W · 16 km/h | W · 20 km/h | W · 19 km/h |
| Humidity (%) | 69% | 69% | 68% | 70% | 69% | 76% | 79% | 79% | 78% | 79% | 70% | 72% |
| Day length | 9.4h | 10.5h | 12.0h | 13.5h | 14.7h | 15.4h | 15.1h | 13.9h | 12.5h | 11.0h | 9.7h | 9.0h |