September weather forecastAgnew, WA
September
Weather in September
September, the first month of the autumn in Agnew, is also an enjoyable month, with an average temperature ranging between max 62.6°F (17°C) and min 49.3°F (9.6°C).Temperature
The arrival of September corresponds with a light shift in temperature, down from a pleasant 68°F (20°C) in August to a refreshing 62.6°F (17°C). In the month of September, Agnew witnesses a consistent average low-temperature of 49.3°F (9.6°C).Humidity
The average relative humidity in September is 79%.Rainfall
In September, in Agnew, the rain falls for 12.9 days. Throughout September, 1.54" (39mm) of precipitation is accumulated. In Agnew, during the entire year, the rain falls for 174.1 days and collects up to 19.45" (494mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in September is 12h and 33min.On the first day of September in Agnew, sunrise is at 6:32 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 6:53 pm PDT.
Sunshine
The average sunshine in September in Agnew is 9.4h.UV index
May through September, with an average maximum UV index of 4, are months with the highest UV index in Agnew. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index of 4 during September translates into these guidelines:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. It's recommended to limit sun exposure when its radiation is at its peak during midday. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Agnew, WA
- Average high temperature in September: 62.6°F
The warmest month (with the highest average high temperature) is August (68°F).
The month with the lowest average high temperature is December (41.2°F).
- Average low temperature in September: 49.3°F
The month with the highest average low temperature is August (52.3°F).
The coldest month (with the lowest average low temperature) is February (34.3°F).
Average pressure in September
Agnew, WA
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.07"Hg).
The month with the lowest atmospheric pressure is March (30"Hg).
Average wind speed in September
Agnew, WA
- Average wind speed in September: 3.7mph
The windiest month (with the highest average wind speed) is November (5.9mph).
The calmest months (with the lowest average wind speed) are August and September (3.7mph).
Average humidity in September
Agnew, WA
- Average humidity in September: 79%
The months with the highest relative humidity are January and February (85%).
The months with the lowest relative humidity are July and August (75%).
Average rainfall in September
Agnew, WA
- Average rainfall in September: 1.54"
The wettest month (with the highest rainfall) is January (2.56").
The driest month (with the least rainfall) is July (0.59").
Average rainfall days in September
Agnew, WA
- Average rainfall days in September: 12.9 days
The month with the highest number of rainy days is March (19.8 days).
The month with the least rainy days is August (6.8 days).
Average snowfall in September
Agnew, WA
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.17").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Agnew, WA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Agnew, WA
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in September: 9h and 24min
The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in September
Agnew, WA
- Average sunshine days in September: 14.8 days
The month with the most sunshine days is August (21.4 days).
The month with the least sunshine days is March (8.9 days).
Average UV index in September
Agnew, WA
- Average UV index in September: 4
The months with the highest UV index are May, June, July, August and September (UV index 4).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Agnew, WA
- Average cloud cover in September: 30
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 21).
Average visibility in September
Agnew, WA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
