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
September's arrival comes with a mild decrease in the average high-temperature, moving subtly from a warm 84.7°F (29.3°C) in August to a still moderately hot 77.4°F (25.2°C). September nights bring a significant cooling from the heat of the day, with averages of 45°F (7.2°C).Humidity
In Selma, the average relative humidity in September is 67%.Rainfall
In September, the rain falls for 5.3 days. Throughout September, 0.59" (15mm) of precipitation is accumulated. Throughout the year, there are 135.3 rainfall days, and 23.54" (598mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
In Selma, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:40 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 6:56 pm PDT.
Sunshine
The average sunshine in September is 10.4h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: The daily maximum UV index of 4 in September interprets into the following advice:
Ensure safety - Recommendations to avert sunburn are presented. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
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 much does it rain in September?
When it does not snow?
How many hours of daylight does Selma have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Selma have in September?
How high is the UV index in September in Selma?
Average temperature in September
Selma, OR
- Average high temperature in September: 77.4°F
The warmest month (with the highest average high temperature) is August (84.7°F).
The month with the lowest average high temperature is December (46°F).
- Average low temperature in September: 45°F
The month with the highest average low temperature is August (49.1°F).
The coldest month (with the lowest average low temperature) is December (31.5°F).
Average pressure in September
Selma, OR
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is August (29.99"Hg).
Average wind speed in September
Selma, OR
- Average wind speed in September: 3.3mph
The windiest month (with the highest average wind speed) is March (4mph).
The calmest month (with the lowest average wind speed) is August (3.2mph).
Average humidity in September
Selma, OR
- Average humidity in September: 67%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (63%).
Average rainfall in September
Selma, OR
- Average rainfall in September: 0.59"
The wettest month (with the highest rainfall) is December (4.02").
The driest month (with the least rainfall) is July (0.12").
Average rainfall days in September
Selma, OR
- Average rainfall days in September: 5.3 days
The month with the highest number of rainy days is March (18.7 days).
The month with the least rainy days is August (2.5 days).
Average snowfall in September
Selma, OR
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.5").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Selma, OR
- 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
Selma, OR
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 10h and 2min
The months with the most sunshine are July and August (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 4h and 42min).
Average sunshine days in September
Selma, OR
- Average sunshine days in September: 23.9 days
The month with the most sunshine days is July (26.7 days).
The month with the least sunshine days is March (10.8 days).
Average UV index in September
Selma, OR
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Selma, OR
- Average cloud cover in September: 23
The month with the most cloud cover is March (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in September
Selma, OR
- Average visibility in September: 5mi
The month with the highest visibility is August (6mi).
The months with the lowest visibility are January, February, March, April and December (4mi).
Selma, Oregon, USA
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