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 to September brings a decrease in the average high-temperature, falling from a tropical 86.7°F (30.4°C) in August to a moderately hot 75.9°F (24.4°C). A sharp divergence from daytime highs is noted during the month of September, with the average nighttime temperature settling at a cool 54.1°F (12.3°C).Humidity
The average relative humidity in September in Wapato is 46%.Rainfall
In September, in Wapato, the rain falls for 3.9 days. Throughout September, 0.24" (6mm) of precipitation is accumulated. Throughout the year, there are 78.5 rainfall days, and 5.16" (131mm) of precipitation is accumulated.Snowfall
Months with snowfall in Wapato, Washington, are January through March, September, November and 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. Throughout the year, there are 12.8 snowfall days, and 5.35" (136mm) of snow is accumulated.Daylight
In September, the average length of the day in Wapato is 12h and 32min.On the first day of September, sunrise is at 6:22 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 6:42 pm PDT.
Sunshine
The average sunshine in September in Wapato is 11.2h.UV index
In September, the average daily maximum UV index in Wapato, Washington, is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the ordinary person.Note: In September, the maximum UV index of 4 transforms into these recommendations:
Undertake protective steps - Recommendations to avoid sunburn are issued. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Wapato in September?
What is the average humidity in September in Wapato?
How much does it rain in Wapato in September?
When does it start to snow in Wapato?
How many hours of daylight does Wapato have in September?
When is the sunrise / sunset in September in Wapato?
How many hours of sunshine does Wapato have in September?
What is the UV index reading in September in Wapato?
Average temperature in September
Wapato, WA
- Average high temperature in September: 75.9°F
The warmest month (with the highest average high temperature) is July (86.9°F).
The month with the lowest average high temperature is December (37°F).
- Average low temperature in September: 54.1°F
The month with the highest average low temperature is August (61.2°F).
The coldest month (with the lowest average low temperature) is December (25.7°F).
Average pressure in September
Wapato, WA
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is August (29.93"Hg).
Average wind speed in September
Wapato, WA
- Average wind speed in September: 6.1mph
The windiest months (with the highest average wind speed) are April and June (7.1mph).
The calmest month (with the lowest average wind speed) is December (4.6mph).
Average humidity in September
Wapato, WA
- Average humidity in September: 46%
The month with the highest relative humidity is January (81%).
The months with the lowest relative humidity are July and August (38%).
Average rainfall in September
Wapato, WA
- Average rainfall in September: 0.24"
The wettest month (with the highest rainfall) is January (0.83").
The driest month (with the least rainfall) is July (0.08").
Average rainfall days in September
Wapato, WA
- Average rainfall days in September: 3.9 days
The month with the highest number of rainy days is March (9.8 days).
The month with the least rainy days is July (2.1 days).
Average snowfall in September
Wapato, WA
- Average snowfall in September: 0.04"
The month with the highest snowfall is February (1.73").
The months with the least snowfall are April, May, June, July, August and October (0").
Average snowfall days in September
Wapato, WA
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (3.9 days).
The months with the least snowfall days are April, May, June, July, August and October (0 days).
Average daylight in September /
Average sunshine in September
Wapato, WA
- Average daylight in September: 12h and 3min
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 42min).
- Average sunshine in September: 11h and 1min
The months with the most sunshine are July and August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 36min).
Average sunshine days in September
Wapato, WA
- Average sunshine days in September: 23.5 days
The month with the most sunshine days is July (27.3 days).
The month with the least sunshine days is February (17.9 days).
Average UV index in September
Wapato, 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
Wapato, WA
- Average cloud cover in September: 14
The month with the most cloud cover is January (Cloud cover 40).
The month with the least cloud cover is July (Cloud cover 8).
Average visibility in September
Wapato, WA
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Wapato, Washington, USA
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