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 subtly correlates with a reduction in the average high-temperature, down from a warm 79.5°F (26.4°C) in August to an agreeable 72.3°F (22.4°C). A notable decrease from the day's highest temperature marks September in Blue River, culminating in an average low of 47.3°F (8.5°C).Humidity
The average relative humidity in September in Blue River, Oregon, is 71%.Rainfall
In Blue River, in September, it is raining for 9 days, with typically 1.61" (41mm) of accumulated 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
In Blue River, 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 the month, sunrise is at 6:33 am and sunset at 7:44 pm. On the last day of September, sunrise is at 7:06 am and sunset at 6:51 pm PDT.
Sunshine
The average sunshine in September is 9.5h.UV index
In September, the average daily maximum UV index in Blue River is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for average individuals.Note: A daily high UV index of 3 in September leads to these guidelines:
Heed the precautions - Suggestions to avoid sunburn are made. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Frequently asked questions
What are the temperatures in Blue River in September?
What is the average humidity in September in Blue River?
How many days does it rain in September in Blue River?
When it does not snow in Blue River?
What is the average length of the day in September in Blue River?
When are sunrise and sunset in September in Blue River?
How many hours of sunshine does Blue River have in September?
What is the UV index intensity in September in Blue River?
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 3min
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 3min
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).
Blue River, Oregon, USA
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