September weather forecastSaint Paul, OR
September
Weather in September
September, the first month of the autumn in Saint Paul, is also a moderately hot month, with an average temperature fluctuating between 51.6°F (10.9°C) and 74.3°F (23.5°C).Temperature
September implies a soft temperature shift, with average high-temperatures reducing from August's 82°F (27.8°C) to a still warm 74.3°F (23.5°C). In the face of high daytime temperatures, Saint Paul witnesses a consistent average nighttime low of 51.6°F (10.9°C) during September.Humidity
In September, the average relative humidity is 70%.Rainfall
In Saint Paul, in September, it is raining for 10.8 days, with typically 1.38" (35mm) of accumulated precipitation. In Saint Paul, during the entire year, the rain falls for 169.4 days and collects up to 27.36" (695mm) of precipitation.Snowfall
In Saint Paul, snow does not fall in April through October.Daylight
In Saint Paul, the average length of the day in September is 12h and 31min.On the first day of the month, sunrise is at 6:34 am and sunset at 7:48 pm. On the last day of September, sunrise is at 7:09 am and sunset at 6:53 pm PDT.
Sunshine
In Saint Paul, the average sunshine in September is 9.3h.UV index
In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the average person.Note: In September, the maximum UV index of 4 transforms into these recommendations:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. 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
Saint Paul, OR
- Average high temperature in September: 74.3°F
The warmest month (with the highest average high temperature) is August (82°F).
The month with the lowest average high temperature is December (44.1°F).
- Average low temperature in September: 51.6°F
The month with the highest average low temperature is August (55°F).
The coldest month (with the lowest average low temperature) is December (34.2°F).
Average pressure in September
Saint Paul, 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
Saint Paul, OR
- Average wind speed in September: 4.3mph
The windiest month (with the highest average wind speed) is March (5.3mph).
The calmest months (with the lowest average wind speed) are June and August (4.2mph).
Average humidity in September
Saint Paul, OR
- Average humidity in September: 70%
The months with the highest relative humidity are February and December (86%).
The month with the lowest relative humidity is August (64%).
Average rainfall in September
Saint Paul, OR
- Average rainfall in September: 1.38"
The wettest month (with the highest rainfall) is December (4.13").
The driest month (with the least rainfall) is August (0.31").
Average rainfall days in September
Saint Paul, OR
- Average rainfall days in September: 10.8 days
The month with the highest number of rainy days is March (19.8 days).
The month with the least rainy days is August (4.4 days).
Average snowfall in September
Saint Paul, OR
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.34").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Saint Paul, OR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Saint Paul, OR
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in September: 9h and 18min
The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 4h and 0min).
Average sunshine days in September
Saint Paul, OR
- Average sunshine days in September: 17.7 days
The month with the most sunshine days is July (25 days).
The month with the least sunshine days is February (8.8 days).
Average UV index in September
Saint Paul, OR
- Average UV index in September: 4
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
Saint Paul, OR
- Average cloud cover in September: 33
The month with the most cloud cover is February (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 22).
Average visibility in September
Saint Paul, OR
- Average visibility in September: 6mi
The months with the highest visibility are July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, May, June, October, November and December (5mi).
