September weather forecastColton, WA
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Colton, Washington, with an average temperature ranging between max 75.4°F (24.1°C) and min 52.7°F (11.5°C).Temperature
September shows a mild decline in the average high-temperature, falling from August's 85.6°F (29.8°C) to a still warm 75.4°F (24.1°C). Colton observes a dramatic plunge from daytime highs in September, settling at an average low-temperature of 52.7°F (11.5°C).Humidity
In September, the average relative humidity in Colton is 45%.Rainfall
In Colton, in September, during 5.1 rainfall days, 0.31" (8mm) of precipitation is typically accumulated. Throughout the year, in Colton, there are 116.2 rainfall days, and 8.23" (209mm) of precipitation is accumulated.Snowfall
In Colton, Washington, snow does not fall in April through September.Daylight
The average length of the day in September is 12h and 32min.On the first day of September, sunrise is at 6:09 am and sunset at 7:26 pm. On the last day of the month, sunrise is at 6:46 am and sunset at 6:29 pm PDT.
Sunshine
The average sunshine in September in Colton is 10.5h.UV index
In September, the average daily maximum UV index in Colton is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: In September, a daily UV index of 4 turns into the following recommendations:
Take necessary precautions - Protection from skin and eye injury is mandatory. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Colton, WA
- Average high temperature in September: 75.4°F
The warmest month (with the highest average high temperature) is August (85.6°F).
The month with the lowest average high temperature is December (36.5°F).
- Average low temperature in September: 52.7°F
The month with the highest average low temperature is August (59.4°F).
The coldest month (with the lowest average low temperature) is December (24.8°F).
Average pressure in September
Colton, WA
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.2"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed in September
Colton, WA
- Average wind speed in September: 4.5mph
The windiest month (with the highest average wind speed) is April (6mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).
Average humidity in September
Colton, WA
- Average humidity in September: 45%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is August (38%).
Average rainfall in September
Colton, WA
- Average rainfall in September: 0.31"
The wettest month (with the highest rainfall) is March (0.98").
The driest month (with the least rainfall) is August (0.24").
Average rainfall days in September
Colton, WA
- Average rainfall days in September: 5.1 days
The months with the highest number of rainy days are March and April (13.8 days).
The month with the least rainy days is August (4.5 days).
Average snowfall in September
Colton, WA
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.89").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days in September
Colton, WA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (4.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Colton, WA
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in September: 10h and 30min
The month with the most sunshine is August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 0min).
Average sunshine days in September
Colton, WA
- Average sunshine days in September: 23.1 days
The month with the most sunshine days is July (23.8 days).
The month with the least sunshine days is February (12.8 days).
Average UV index in September
Colton, WA
- Average UV index in September: 4
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Colton, WA
- Average cloud cover in September: 18
The month with the most cloud cover is February (Cloud cover 48).
The months with the least cloud cover are July and August (Cloud cover 12).
Average visibility in September
Colton, WA
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
