Weather in September
Temperature
September witnesses a gentle descent in average high-temperature, descending from August's warm 75.4°F (24.1°C) to a comfortable 67.3°F (19.6°C). Washington Island encounters a steady low-temperature average of 50.4°F (10.2°C) throughout the month of September.Rainfall
The wettest months in Washington Island, Wisconsin, are August and September, with an average 3.23" (82mm) of rainfall.Snowfall
In Washington Island, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 31min.On the first day of the month, sunrise is at 6:10 am and sunset at 7:24 pm. On the last day of September, in Washington Island, Wisconsin, sunrise is at 6:45 am and sunset at 6:29 pm CDT.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
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Average temperature in September
Washington Island, WI
- Average high temperature in September: 67.3°F
The warmest month (with the highest average high temperature) is July (76.3°F).
The month with the lowest average high temperature is January (25.9°F).
- Average low temperature in September: 50.4°F
The month with the highest average low temperature is August (57.2°F).
The coldest month (with the lowest average low temperature) is January (11.1°F).
Average rainfall in September
Washington Island, WI
- Average rainfall in September: 3.2"
The wettest months (with the highest rainfall) are June, August and September (3.2").
The driest month (with the least rainfall) is February (0.9").
Average rainfall days in September
Washington Island, WI
- Average rainfall days in September: 9.6 days
The month with the highest number of rainy days is September (9.6 days).
The month with the least rainy days is February (5.5 days).
Average snowfall in September
Washington Island, WI
- Average snowfall in September: 0"
The month with the highest snowfall is January (13.2").
The months with the least snowfall are June, July, August and September (0").
Average daylight in September
Washington Island, WI
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
Washington Island, Wisconsin, USA
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