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
The onset of September is marked by a minor decrease in temperature, transitioning from a moderately hot 79.3°F (26.3°C) in August to an agreeable 71.6°F (22°C). The significant decline in Columbia City's temperature, from day to night, averages of 48.7°F (9.3°C) in September.Humidity
In September, the average relative humidity is 75%.Rainfall
In Columbia City, in September, during 11.1 rainfall days, 1.69" (43mm) of precipitation is typically accumulated. In Columbia City, during the entire year, the rain falls for 180.2 days and collects up to 36.77" (934mm) of precipitation.Snowfall
April through October are months without snowfall in Columbia City.Daylight
In Columbia City, the average length of the day in September is 12h and 31min.On the first day of September in Columbia City, Oregon, sunrise is at 6:33 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 6:52 pm PDT.
Sunshine
In Columbia City, the average sunshine in September is 8.8h.UV index
In Columbia City, the average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the ordinary person.Note: The maximum UV index of 3 during September leads to these instructions:
Make use of precautions - Suggestions to resist sunburn are communicated. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Frequently asked questions
What is the average September temperature in Columbia City?
What is the average humidity in September in Columbia City?
How much does it rain in Columbia City in September?
When it does not snow in Columbia City?
What is the average length of the day in September in Columbia City?
When is the sunrise / sunset in September in Columbia City?
How long on average sun shines in September in Columbia City?
How high is the UV index in September in Columbia City?
Average temperature in September
Columbia City, OR
- Average high temperature in September: 71.6°F
The warmest month (with the highest average high temperature) is August (79.3°F).
The month with the lowest average high temperature is December (42.6°F).
- Average low temperature in September: 48.7°F
The month with the highest average low temperature is August (51.6°F).
The coldest month (with the lowest average low temperature) is December (32.9°F).
Average pressure in September
Columbia City, OR
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed in September
Columbia City, OR
- Average wind speed in September: 3.9mph
The windiest month (with the highest average wind speed) is January (4.9mph).
The calmest month (with the lowest average wind speed) is September (3.9mph).
Average humidity in September
Columbia City, OR
- Average humidity in September: 75%
The months with the highest relative humidity are February and November (87%).
The months with the lowest relative humidity are July and August (70%).
Average rainfall in September
Columbia City, OR
- Average rainfall in September: 1.69"
The wettest month (with the highest rainfall) is January (5.43").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in September
Columbia City, OR
- Average rainfall days in September: 11.1 days
The month with the highest number of rainy days is March (21 days).
The month with the least rainy days is July (5.2 days).
Average snowfall in September
Columbia City, OR
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.01").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Columbia City, OR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.9 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
Columbia City, OR
- 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: 8h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The months with the least sunshine are January and February (Average sunshine: 3h and 42min).
Average sunshine days in September
Columbia City, OR
- Average sunshine days in September: 17 days
The month with the most sunshine days is July (24.4 days).
The month with the least sunshine days is February (8.3 days).
Average UV index in September
Columbia City, OR
- Average UV index in September: 3
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
Columbia City, OR
- Average cloud cover in September: 38
The month with the most cloud cover is February (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in September
Columbia City, OR
- Average visibility in September: 5mi
The months with the highest visibility are May, June, July, August, September and October (5mi).
The months with the lowest visibility are January, February, March, April, November and December (4mi).
Columbia City, Oregon, USA
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