September weather forecastMarietta, MN
September
Weather in September
September, the first month of the autumn in Marietta, is still a pleasant month, with an average temperature ranging between max 73°F (22.8°C) and min 52.7°F (11.5°C).Temperature
September witnesses a gentle descent in average high-temperature, descending from August's moderately hot 80.6°F (27°C) to an agreeable 73°F (22.8°C). Marietta, during September nights, observes an average temperature of 52.7°F (11.5°C).Humidity
The average relative humidity in September is 68%.Rainfall
In Marietta, during September, the rain falls for 8.5 days and regularly aggregates up to 1.57" (40mm) of precipitation. In Marietta, during the entire year, the rain falls for 99.9 days and collects up to 19.65" (499mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September is 12h and 31min.On the first day of September, sunrise is at 6:48 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 7:07 pm CDT.
Sunshine
In Marietta, the average sunshine in September is 9h.UV index
In Marietta, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the average person.Note: A maximum high UV index of 4 in September translates into the following recommendations:
Guard yourself - Avoiding sunburn is suggested. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Marietta, MN
- Average high temperature in September: 73°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (20.3°F).
- Average low temperature in September: 52.7°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (6.3°F).
Average pressure in September
Marietta, MN
- Average pressure in September: 29.98"Hg
The months with the highest atmospheric pressure are January and February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in September
Marietta, MN
- Average wind speed in September: 8.9mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is July (7.6mph).
Average humidity in September
Marietta, MN
- Average humidity in September: 68%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is October (66%).
Average rainfall in September
Marietta, MN
- Average rainfall in September: 1.57"
The wettest month (with the highest rainfall) is July (3.35").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days in September
Marietta, MN
- Average rainfall days in September: 8.5 days
The month with the highest number of rainy days is June (15.9 days).
The month with the least rainy days is February (1.3 days).
Average snowfall in September
Marietta, MN
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.53").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Marietta, MN
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and December (10.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Marietta, MN
- 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 0min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in September
Marietta, MN
- Average sunshine days in September: 19.4 days
The month with the most sunshine days is November (21.4 days).
The month with the least sunshine days is June (12.6 days).
Average UV index in September
Marietta, MN
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and November (UV index 1).
Average cloud cover in September
Marietta, MN
- Average cloud cover in September: 29
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in September
Marietta, MN
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
