Average temperature in Sumner (WA)
The mean minimum and maximum temperatures over the year in Sumner (Washington State), the United States of America.
- The months of June, July, August and September have nice average temperatures.
- On average, the warmest month is August with 25°C.
- On average, the coolest month is December with 8°C.
- The average annual maximum temperature is 16°C.
- The average annual minimum temperature is 6°C.
Weather Forecasts for Sumner (WA)
partly cloudy and no rain
overcast and heavy rain
overcast and heavy rain