Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The shift from August to September involves a decrease in the average high-temperature, from a warm 83.3°F (28.5°C) to an agreeable 72.5°F (22.5°C). An average low-temperature of 52.2°F (11.2°C) is observed during the September nights.Humidity
In Creston, the average relative humidity in September is 46%.Rainfall
In Creston, Washington, in September, it is raining for 7.6 days, with typically 0.59" (15mm) of accumulated precipitation. Throughout the year, in Creston, there are 127.9 rainfall days, and 15.71" (399mm) of precipitation is accumulated.Snowfall
Months with snowfall in Creston, Washington, are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. In Creston, during the entire year, snow falls for 65.1 days and aggregates up to 37.36" (949mm) of snow.Daylight
The average length of the day in September is 12h and 33min.On the first day of September in Creston, Washington, sunrise is at 6:13 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 6:34 pm PDT.
Sunshine
The average sunshine in September is 10.4h.UV index
In Creston, Washington, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: In September, a daily UV index of 4 turns into the following recommendations:
Exercise prevention - Warding off sunburn is urged. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Frequently asked questions
What is the usual temperature for Creston in September?
What is the average humidity in September in Creston?
How much does it rain in Creston in September?
When does it start to snow in Creston?
How many hours of daylight does Creston have in September?
When is the sunrise / sunset in September in Creston?
How long on average sun shines in September in Creston?
What is the UV index intensity in September in Creston?
Average temperature in September
Creston, WA
- Average high temperature in September: 72.5°F
The warmest months (with the highest average high temperature) are July and August (83.3°F).
The month with the lowest average high temperature is December (31.5°F).
- Average low temperature in September: 52.2°F
The month with the highest average low temperature is August (60.3°F).
The coldest month (with the lowest average low temperature) is December (21.9°F).
Average pressure in September
Creston, WA
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is August (29.9"Hg).
Average wind speed in September
Creston, WA
- Average wind speed in September: 6.9mph
The windiest months (with the highest average wind speed) are March and April (8.1mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in September
Creston, WA
- Average humidity in September: 46%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (37%).
Average rainfall in September
Creston, WA
- Average rainfall in September: 0.59"
The wettest month (with the highest rainfall) is March (1.97").
The driest months (with the least rainfall) are July and August (0.31").
Average rainfall days in September
Creston, WA
- Average rainfall days in September: 7.6 days
The month with the highest number of rainy days is March (16.3 days).
The month with the least rainy days is August (5.2 days).
Average snowfall in September
Creston, WA
- Average snowfall in September: 0.04"
The month with the highest snowfall is January (10").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Creston, WA
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is December (15.9 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Creston, 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).
- Average sunshine in September: 10h and 2min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 4h and 6min).
Average sunshine days in September
Creston, WA
- Average sunshine days in September: 20.9 days
The month with the most sunshine days is July (23.7 days).
The month with the least sunshine days is March (10.2 days).
Average UV index in September
Creston, 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, March, October, November and December (UV index 2).
Average cloud cover in September
Creston, WA
- Average cloud cover in September: 19
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is July (Cloud cover 12).
Average visibility in September
Creston, 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 month with the lowest visibility is January (4mi).
Creston, Washington, USA
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