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City of Sumner, WASumner, WA 7-Day Weather Forecast
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Sumner Weather Forecast
Sumner, WA Weather Forecast Date: 236 AM PDT Thu Sep 03 2026
Weather forecast for Sumner, WA
Today Hi: 60°FHi: 16°C Lo: 46°F Lo: 8°C |
Today... Showers in the morning, then showers likely and a chance of thunderstorms in the afternoon. Rainfall amounts a tenth to a quarter of an inch possible, except higher amounts possible in thunderstorms. Highs in the upper 50s to mid 60s. South wind 10 to 15 mph Decreasing to 10 mph or less in the afternoon. |
| Fri Hi: 65°FHi: 18°C Lo: 50°F Lo: 10°C |
Friday... Mostly sunny. A slight chance of thunderstorms late in the afternoon. Highs in the 60s. Light wind. |
Sat Hi: 66°FHi: 19°C Lo: 51°F Lo: 11°C |
Saturday... Partly sunny. A slight chance of showers in the morning. Highs in the 60s to lower 70s. Light wind. |
Sun Hi: 73°FHi: 23°C Lo: 53°F Lo: 12°C |
Sunday... Mostly sunny. Highs in the lower to mid 70s. |
| Labor Day Hi: 73°FHi: 23°C Lo: 53°F Lo: 12°C |
Labor Day... Mostly sunny. Highs in the lower to mid 70s. |
Tue Hi: 73°FHi: 23°C Lo: 53°F Lo: 12°C |
Tuesday... Partly sunny. Highs in the lower to mid 70s. |
| Wed Hi: 75°FHi: 24°C |
Wednesday... Mostly sunny. Highs in the 70s. |
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