September weather forecastPrairie City, OR
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Prairie City, Oregon, with an average temperature varying between 71.2°F (21.8°C) and 44.2°F (6.8°C).Temperature
The average high-temperature decreases in September, shifting from a moderately hot 81°F (27.2°C) in August to an agreeable 71.2°F (21.8°C). A considerable shift from the daytime highs is observed in Prairie City during September nights, with an average low of 44.2°F (6.8°C).Humidity
In September, the average relative humidity is 51%.Rainfall
In Prairie City, in September, it is raining for 6.6 days, with typically 0.55" (14mm) of accumulated precipitation. Throughout the year, in Prairie City, there are 127.7 rainfall days, and 17.09" (434mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, September through December. September is the first month it typically snows in Prairie City. Throughout September, in the average 0.2 snowfall days, it receives 0.08" (2mm) of snow. In Prairie City, during the entire year, snow falls for 62.5 days and aggregates up to 39.17" (995mm) of snow.Daylight
The average length of the day in September is 12h and 30min.On the first day of the month, sunrise is at 6:18 am and sunset at 7:30 pm. On the last day of September, sunrise is at 6:52 am and sunset at 6:36 pm PDT.
Sunshine
In September, the average sunshine is 10.7h.UV index
The average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The UV index of 3 during September leads to these advisories:
Ensure safety - Imperative it is to shield skin and eyes from damage. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Prairie City, OR
- Average high temperature in September: 71.2°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is December (33.4°F).
- Average low temperature in September: 44.2°F
The month with the highest average low temperature is August (49.6°F).
The coldest month (with the lowest average low temperature) is December (19.6°F).
Average pressure in September
Prairie City, OR
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.22"Hg).
The month with the lowest atmospheric pressure is August (29.93"Hg).
Average wind speed in September
Prairie City, OR
- Average wind speed in September: 5mph
The windiest month (with the highest average wind speed) is April (6.2mph).
The calmest months (with the lowest average wind speed) are August and September (5mph).
Average humidity in September
Prairie City, OR
- Average humidity in September: 51%
The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is August (42%).
Average rainfall in September
Prairie City, OR
- Average rainfall in September: 0.55"
The wettest month (with the highest rainfall) is February (2.28").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in September
Prairie City, OR
- Average rainfall days in September: 6.6 days
The month with the highest number of rainy days is March (17.3 days).
The month with the least rainy days is August (3.3 days).
Average snowfall in September
Prairie City, OR
- Average snowfall in September: 0.08"
The month with the highest snowfall is February (10.31").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Prairie City, OR
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is December (14.5 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Prairie City, OR
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 10h and 42min
The month with the most sunshine is August (Average sunshine: 12h and 6min).
The months with the least sunshine are January and February (Average sunshine: 5h and 12min).
Average sunshine days in September
Prairie City, OR
- Average sunshine days in September: 21.8 days
The month with the most sunshine days is July (24.9 days).
The month with the least sunshine days is February (9 days).
Average UV index in September
Prairie 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, March, October, November and December (UV index 2).
Average cloud cover in September
Prairie City, OR
- Average cloud cover in September: 17
The month with the most cloud cover is February (Cloud cover 49).
The months with the least cloud cover are July and August (Cloud cover 9).
Average visibility in September
Prairie City, OR
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February and December (4mi).
