September weather forecastSaint Paul, IA
September
Weather in September
September, the first month of the autumn in Saint Paul, is still a warm month, with an average temperature varying between 57.4°F (14.1°C) and 77°F (25°C).Temperature
September's onset corresponds with a subtle shift in the average high-temperature, slightly moving from a moderately hot 82.6°F (28.1°C) in August to a still warm 77°F (25°C). Saint Paul experiences an average low-temperature of 57.4°F (14.1°C) in month of September.Humidity
In Saint Paul, the average relative humidity in September is 75%.Rainfall
In Saint Paul, in September, it is raining for 12 days, with typically 2.28" (58mm) of accumulated precipitation. Throughout the year, there are 145.2 rainfall days, and 28.98" (736mm) of precipitation is accumulated.Snowfall
In Saint Paul, snow does not fall in May through September.Daylight
In Saint Paul, the average length of the day in September is 12h and 27min.On the first day of the month, sunrise is at 6:33 am and sunset at 7:37 pm. On the last day of September, sunrise is at 7:02 am and sunset at 6:49 pm CDT.
Sunshine
In Saint Paul, the average sunshine in September is 9.5h.UV index
The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: In September, a daily UV index of 4 turns into the following recommendations:
Take precautions - Protection against sunburn is recommended. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Saint Paul, IA
- Average high temperature in September: 77°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (30.2°F).
- Average low temperature in September: 57.4°F
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).
Average pressure in September
Saint Paul, IA
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Saint Paul, IA
- Average wind speed in September: 7.7mph
The windiest month (with the highest average wind speed) is January (10.6mph).
The calmest month (with the lowest average wind speed) is July (6.7mph).
Average humidity in September
Saint Paul, IA
- Average humidity in September: 75%
The month with the highest relative humidity is July (82%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Saint Paul, IA
- Average rainfall in September: 2.28"
The wettest month (with the highest rainfall) is May (4.25").
The driest month (with the least rainfall) is December (1.38").
Average rainfall days in September
Saint Paul, IA
- Average rainfall days in September: 12 days
The month with the highest number of rainy days is May (19.2 days).
The month with the least rainy days is February (4.9 days).
Average snowfall in September
Saint Paul, IA
- Average snowfall in September: 0"
The month with the highest snowfall is January (4.41").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Saint Paul, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Saint Paul, IA
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 9h and 30min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in September
Saint Paul, IA
- Average sunshine days in September: 16.3 days
The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is May (9.2 days).
Average UV index in September
Saint Paul, IA
- Average UV index in September: 4
The months with the highest UV index are June, July and August (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, IA
- Average cloud cover in September: 29
The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are July, August and September (Cloud cover 29).
Average visibility in September
Saint Paul, IA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
