Discover the best time of year, based on historical climate, temperature, and precipitation.
The best weather in Issaquah is from July, August, September. — consistent weather climate
🌥Mild
| Score | 6 | 12 | 28 | 40 | 67 | 72 | 94 | 92 | 83 | 59 | 8 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Climate | Cold | Cold | Cold | Cold | Cool & rainy | Mild | Pleasant | Pleasant | Mild | Cool & rainy | Cold | Cold |
| Temperature | 3–9°C | 2–9°C | 3–12°C | 4–15°C | 8–19°C | 11–22°C | 14–27°C | 14–27°C | 12–23°C | 8–17°C | 4–11°C | 3–8°C |
| Feels like | -1–6°C | -1–6°C | 0–9°C | 2–13°C | 6–18°C | 10–23°C | 14–28°C | 14–28°C | 11–23°C | 7–16°C | 1–8°C | -1–5°C |
| Precipitation | 252mm 25 days | 167mm 20 days | 132mm 19 days | 122mm 18 days | 111mm 16 days | 95mm 14 days | 18mm 5 days | 35mm 6 days | 97mm 10 days | 148mm 15 days | 252mm 21 days | 245mm 23 days |
| Sunshine | 2.5h ☀︎ 28% | 3.6h ☀︎ 35% | 5.7h ☀︎ 48% | 7.8h ☀︎ 57% | 8.1h ☀︎ 54% | 10.5h ☀︎ 66% | 12.5h ☀︎ 81% | 11.2h ☀︎ 79% | 9.2h ☀︎ 73% | 6.0h ☀︎ 56% | 3.5h ☀︎ 38% | 2.3h ☀︎ 26% |
| Wind | SE · 18 km/h | SE · 16 km/h | S · 14 km/h | S · 15 km/h | SW · 14 km/h | SW · 13 km/h | NW · 11 km/h | W · 12 km/h | SE · 12 km/h | SE · 13 km/h | SE · 16 km/h | SE · 17 km/h |
| Humidity (%) | 83% | 82% | 80% | 76% | 77% | 76% | 69% | 71% | 78% | 83% | 83% | 84% |
| Day length | 8.9h | 10.3h | 11.9h | 13.7h | 15.1h | 15.9h | 15.5h | 14.2h | 12.5h | 10.8h | 9.3h | 8.5h |