September weather forecastBlue River, OR
September
Weather in September
The first month of the autumn, September, is also an agreeable month in Blue River, Oregon, with an average temperature fluctuating between 72.3°F (22.4°C) and 47.3°F (8.5°C).Temperature
Blue River in September undergoes a slight reduction in the average high-temperature, shifting from August's moderately hot 79.5°F (26.4°C) to a pleasant 72.3°F (22.4°C). Blue River experiences a significant downturn from peak daytime temperatures throughout September, with the average low-temperature dipping to a chilly 47.3°F (8.5°C).Humidity
In September, the average relative humidity is 71%.Rainfall
In Blue River, during September, the rain falls for 9 days and regularly aggregates up to 1.61" (41mm) of precipitation. In Blue River, during the entire year, the rain falls for 167.6 days and collects up to 36.54" (928mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 29min.On the first day of September, sunrise is at 6:33 am and sunset at 7:44 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 6:51 pm PDT.
Sunshine
In Blue River, the average sunshine in September is 9.5h.UV index
In Blue River, Oregon, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: The maximum daily UV index, 3 in September, converts into the following recommendations:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Blue River, OR
- Average high temperature in September: 72.3°F
The warmest month (with the highest average high temperature) is August (79.5°F).
The month with the lowest average high temperature is December (44.4°F).
- Average low temperature in September: 47.3°F
The month with the highest average low temperature is August (49.8°F).
The coldest month (with the lowest average low temperature) is December (32.9°F).
Average pressure in September
Blue River, 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
Blue River, OR
- Average wind speed in September: 3.9mph
The windiest month (with the highest average wind speed) is January (5.1mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in September
Blue River, OR
- Average humidity in September: 71%
The months with the highest relative humidity are February, March and December (86%).
The month with the lowest relative humidity is August (66%).
Average rainfall in September
Blue River, OR
- Average rainfall in September: 1.61"
The wettest month (with the highest rainfall) is December (5.47").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in September
Blue River, OR
- Average rainfall days in September: 9 days
The month with the highest number of rainy days is March (21.1 days).
The month with the least rainy days is July (4.1 days).
Average snowfall in September
Blue River, OR
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.7").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Blue River, OR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.4 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
Blue River, 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: 8h and 54min).
- Average sunshine in September: 9h and 30min
The month with the most sunshine is August (Average sunshine: 11h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 6min).
Average sunshine days in September
Blue River, OR
- Average sunshine days in September: 19.3 days
The month with the most sunshine days is July (25.7 days).
The month with the least sunshine days is February (8.4 days).
Average UV index in September
Blue River, OR
- Average UV index in September: 3
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is November (UV index 1).
Average cloud cover in September
Blue River, OR
- Average cloud cover in September: 30
The months with the most cloud cover are February and March (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 19).
Average visibility in September
Blue River, OR
- Average visibility in September: 5mi
The month with the highest visibility is August (6mi).
The months with the lowest visibility are February and April (4mi).
