September weather forecastSwift, MN
September
Weather in September
The first month of the autumn, September, is still a refreshing month in Swift, Minnesota, with an average temperature ranging between max 63.9°F (17.7°C) and min 49.6°F (9.8°C).Temperature
Swift's progression into September involves a drop in the average high-temperature, receding from a pleasant 73°F (22.8°C) in August to an enjoyable 63.9°F (17.7°C). Swift's temperature in September lowers to a consistent average of 49.6°F (9.8°C) during the nights.Humidity
In September, the average relative humidity in Swift is 73%.Rainfall
In September, in Swift, the rain falls for 10.9 days. Throughout September, 2.13" (54mm) of precipitation is accumulated. Throughout the year, in Swift, there are 109 rainfall days, and 18.66" (474mm) of precipitation is accumulated.Snowfall
In Swift, Minnesota, snow does not fall in June through September.Daylight
In Swift, Minnesota, the average length of the day in September is 12h and 34min.On the first day of September, sunrise is at 6:38 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 7:01 pm CDT.
Sunshine
The average sunshine in September in Swift is 8.5h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: In September, the average maximum UV index of 4 translates into the following recommendations:
Ensure safety - Imperative it is to shield skin and eyes from damage. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Swift, MN
- Average high temperature in September: 63.9°F
The warmest months (with the highest average high temperature) are July and August (73°F).
The month with the lowest average high temperature is January (13.8°F).
- Average low temperature in September: 49.6°F
The month with the highest average low temperature is July (57.2°F).
The coldest month (with the lowest average low temperature) is January (1°F).
Average pressure in September
Swift, MN
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Swift, MN
- Average wind speed in September: 9.1mph
The windiest month (with the highest average wind speed) is November (9.7mph).
The calmest month (with the lowest average wind speed) is August (7.5mph).
Average humidity in September
Swift, MN
- Average humidity in September: 73%
The month with the highest relative humidity is February (94%).
The month with the lowest relative humidity is May (69%).
Average rainfall in September
Swift, MN
- Average rainfall in September: 2.13"
The wettest month (with the highest rainfall) is July (2.87").
The driest months (with the least rainfall) are January and February (0.67").
Average rainfall days in September
Swift, MN
- Average rainfall days in September: 10.9 days
The month with the highest number of rainy days is June (16.3 days).
The month with the least rainy days is January (1.5 days).
Average snowfall in September
Swift, MN
- Average snowfall in September: 0"
The month with the highest snowfall is January (4.96").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Swift, MN
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (20.2 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Swift, MN
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).
- Average sunshine in September: 8h 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: 1h and 54min).
Average sunshine days in September
Swift, MN
- Average sunshine days in September: 16.4 days
The month with the most sunshine days is August (16.9 days).
The months with the least sunshine days are March and June (11.6 days).
Average UV index in September
Swift, MN
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in September
Swift, MN
- Average cloud cover in September: 36
The month with the most cloud cover is January (Cloud cover 82).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in September
Swift, MN
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and March (4mi).
