September weather forecastCottage Grove, OR
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Cottage Grove, Oregon, with an average temperature varying between 73.6°F (23.1°C) and 46°F (7.8°C).Temperature
September brings a slight decrease in the average high-temperature, shifting from 80.1°F (26.7°C) in August to a still moderately hot 73.6°F (23.1°C). Cottage Grove experiences a dramatic descent in temperature during September, with the average nighttime reading settling at a frosty 46°F (7.8°C).Humidity
The average relative humidity in September in Cottage Grove is 74%.Rainfall
In Cottage Grove, in September, during 8.1 rainfall days, 1.38" (35mm) of precipitation is typically accumulated. In Cottage Grove, during the entire year, the rain falls for 157.8 days and collects up to 30.63" (778mm) of precipitation.Snowfall
In Cottage Grove, snow does not fall in May through October.Daylight
The average length of the day in September is 12h and 29min.On the first day of September, sunrise is at 6:36 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 6:54 pm PDT.
Sunshine
In Cottage Grove, the average sunshine in September is 9.3h.UV index
In September, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In September, a daily UV index of 3 turns into the following recommendations:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. To avoid the Sun's strongest rays, limit exposure around the mid-day period. 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
Average temperature in September
Cottage Grove, OR
- Average high temperature in September: 73.6°F
The warmest month (with the highest average high temperature) is August (80.1°F).
The month with the lowest average high temperature is December (45.9°F).
- Average low temperature in September: 46°F
The month with the highest average low temperature is August (48.7°F).
The coldest month (with the lowest average low temperature) is December (33.4°F).
Average pressure in September
Cottage Grove, OR
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in September
Cottage Grove, OR
- Average wind speed in September: 3.5mph
The windiest month (with the highest average wind speed) is January (4.5mph).
The calmest month (with the lowest average wind speed) is August (3.4mph).
Average humidity in September
Cottage Grove, OR
- Average humidity in September: 74%
The month with the highest relative humidity is February (87%).
The months with the lowest relative humidity are July and August (70%).
Average rainfall in September
Cottage Grove, OR
- Average rainfall in September: 1.38"
The wettest month (with the highest rainfall) is December (4.61").
The driest month (with the least rainfall) is July (0.2").
Average rainfall days in September
Cottage Grove, OR
- Average rainfall days in September: 8.1 days
The month with the highest number of rainy days is March (20.1 days).
The month with the least rainy days is August (3.6 days).
Average snowfall in September
Cottage Grove, OR
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.27").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Cottage Grove, 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
Cottage Grove, OR
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 9h and 18min
The month with the most sunshine is August (Average sunshine: 11h and 6min).
The months with the least sunshine are February and December (Average sunshine: 4h and 12min).
Average sunshine days in September
Cottage Grove, OR
- Average sunshine days in September: 20 days
The month with the most sunshine days is July (25.8 days).
The months with the least sunshine days are February and March (9.3 days).
Average UV index in September
Cottage Grove, OR
- Average UV index in September: 3
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Cottage Grove, OR
- Average cloud cover in September: 33
The month with the most cloud cover is March (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility in September
Cottage Grove, OR
- Average visibility in September: 5mi
The months with the highest visibility are July, August, September and October (5mi).
The months with the lowest visibility are January, February, March, April, May, June, November and December (4mi).
