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
With September's arrival, Benton City sees a decrease in average high-temperatures, moving from a tropical 89.1°F (31.7°C) in August to a warm 78.3°F (25.7°C). Benton City observes an average low-temperature of 57°F (13.9°C) during September nights.Humidity
The average relative humidity in September is 43%.Rainfall
In Benton City, during September, the rain falls for 3.6 days and regularly aggregates up to 0.28" (7mm) of precipitation. Throughout the year, there are 94.1 rainfall days, and 6.89" (175mm) of precipitation is accumulated.Snowfall
January through March, September, November and December are months with snowfall in Benton City. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.16" (4mm) of snow. In Benton City, Washington, during the entire year, snow falls for 10.8 days and aggregates up to 5.39" (137mm) of snow.Daylight
The average length of the day in September is 12h and 31min.On the first day of September, sunrise is at 6:19 am and sunset at 7:35 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 6:39 pm PDT.
Sunshine
In September, the average sunshine in Benton City is 10.8h.UV index
In Benton City, 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 unsafe exposure to UV radiation for the average person.Note: In September, a regular UV index of 4 translates into these guidelines:
Ensure safety - Imperative it is to shield skin and eyes from damage. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
How many days does it rain in September?
When does it start to snow?
How many hours of daylight does Benton City have in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Benton City, WA
- Average high temperature in September: 78.3°F
The warmest month (with the highest average high temperature) is July (89.6°F).
The month with the lowest average high temperature is December (37.9°F).
- Average low temperature in September: 57°F
The month with the highest average low temperature is August (63.7°F).
The coldest month (with the lowest average low temperature) is December (27.5°F).
Average pressure in September
Benton City, WA
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.18"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed in September
Benton City, WA
- Average wind speed in September: 6.9mph
The windiest month (with the highest average wind speed) is April (8.6mph).
The calmest month (with the lowest average wind speed) is December (5.9mph).
Average humidity in September
Benton City, WA
- Average humidity in September: 43%
The month with the highest relative humidity is January (80%).
The months with the lowest relative humidity are July and August (36%).
Average rainfall in September
Benton City, WA
- Average rainfall in September: 0.28"
The wettest month (with the highest rainfall) is December (0.91").
The driest month (with the least rainfall) is July (0.2").
Average rainfall days in September
Benton City, WA
- Average rainfall days in September: 3.6 days
The month with the highest number of rainy days is March (11.8 days).
The month with the least rainy days is July (3.2 days).
Average snowfall in September
Benton City, WA
- Average snowfall in September: 0.16"
The month with the highest snowfall is February (2.17").
The months with the least snowfall are April, May, June, July, August and October (0").
Average snowfall days in September
Benton City, WA
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is December (3.3 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
Benton City, WA
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 10h and 5min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 12min).
Average sunshine days in September
Benton City, WA
- Average sunshine days in September: 24.6 days
The month with the most sunshine days is July (25.9 days).
The month with the least sunshine days is February (16.5 days).
Average UV index in September
Benton City, 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
Benton City, WA
- Average cloud cover in September: 16
The month with the most cloud cover is January (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility in September
Benton City, 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).
Benton City, Washington, USA
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