Weather in September
Temperature
September signifies a gentle decline in Allyn-Grapeview's average high-temperature, easing from a moderately hot 77°F (25°C) in August to an agreeable 70.9°F (21.6°C). Allyn-Grapeview anticipates a considerable cooling off from the daytime high to an average minimum temperature of 49.1°F (9.5°C) in September.Rainfall
In Allyn-Grapeview, in September, it is raining for 7 days, with typically 2.09" (53mm) of accumulated precipitation. In Allyn-Grapeview, during the entire year, the rain falls for 146 days and collects up to 52.17" (1325mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
The average length of the day in September is 12h and 32min.On the first day of the month, sunrise is at 6:31 am and sunset at 7:50 pm. On the last day of September, sunrise is at 7:10 am and sunset at 6:51 pm PDT.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
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Average temperature in September
Allyn-Grapeview, WA
- Average high temperature in September: 70.8°F
The warmest month (with the highest average high temperature) is July (77.1°F).
The month with the lowest average high temperature is January (44.4°F).
- Average low temperature in September: 49.1°F
The month with the highest average low temperature is August (52.6°F).
The coldest month (with the lowest average low temperature) is January (34.3°F).
Average rainfall in September
Allyn-Grapeview, WA
- Average rainfall in September: 2.1"
The wettest month (with the highest rainfall) is December (8.8").
The driest month (with the least rainfall) is July (0.8").
Average rainfall days in September
Allyn-Grapeview, WA
- Average rainfall days in September: 7 days
The month with the highest number of rainy days is December (19 days).
The month with the least rainy days is July (4 days).
Average snowfall in September
Allyn-Grapeview, WA
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.2").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average daylight in September
Allyn-Grapeview, WA
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
Allyn-Grapeview, Washington, USA
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