Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
Riverton's September weather features a mild decline in high-temperatures, reducing from a moderately hot 78.4°F (25.8°C) in August to an agreeable 69.3°F (20.7°C). The low-temperature average for Riverton during September stands at a chilly 49.1°F (9.5°C).Humidity
The average relative humidity in September is 74%.Rainfall
In Riverton, in September, during 10.1 rainfall days, 1.26" (32mm) of precipitation is typically accumulated. In Riverton, during the entire year, the rain falls for 108 days and collects up to 19.88" (505mm) of precipitation.Snowfall
In Riverton, snow does not fall in June through September.Daylight
In Riverton, the average length of the day in September is 12h and 32min.On the first day of the month, sunrise is at 6:37 am and sunset at 7:54 pm. On the last day of September, in Riverton, Minnesota, sunrise is at 7:14 am and sunset at 6:57 pm CDT.
Sunshine
The average sunshine in September in Riverton, Minnesota, is 8.3h.UV index
The average daily maximum UV index in September in Riverton, Minnesota, is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index of 4 during September translates into the following directions:
Put precautions into practice - Ensuring skin and eye safety is a necessity. It's recommended to limit sun exposure when its radiation is at its peak during midday. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Frequently asked questions
What are the temperatures in Riverton in September?
What is the average humidity in September in Riverton?
How much does it rain in Riverton in September?
When it does not snow in Riverton?
Does it snow in Riverton in September?
How many hours of daylight does Riverton have in September?
What time are sunrise and sunset in September in Riverton?
How long on average sun shines in September in Riverton?
How high is the UV index in September in Riverton?
Average temperature in September
Riverton, MN
- Average high temperature in September: 69.3°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (17.6°F).
- Average low temperature in September: 49.1°F
The month with the highest average low temperature is July (58.8°F).
The coldest month (with the lowest average low temperature) is January (3.6°F).
Average pressure in September
Riverton, MN
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Riverton, MN
- Average wind speed in September: 7.1mph
The windiest month (with the highest average wind speed) is April (7.5mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in September
Riverton, MN
- Average humidity in September: 74%
The month with the highest relative humidity is January (92%).
The month with the lowest relative humidity is May (70%).
Average rainfall in September
Riverton, MN
- Average rainfall in September: 1.26"
The wettest month (with the highest rainfall) is June (3.11").
The driest month (with the least rainfall) is January (0.71").
Average rainfall days in September
Riverton, MN
- Average rainfall days in September: 10.1 days
The month with the highest number of rainy days is June (15.3 days).
The months with the least rainy days are January and February (2.2 days).
Average snowfall in September
Riverton, MN
- Average snowfall in September: 0"
The month with the highest snowfall is December (8.58").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Riverton, MN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (20.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Riverton, MN
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).
Average sunshine days in September
Riverton, MN
- Average sunshine days in September: 17.6 days
The month with the most sunshine days is September (17.6 days).
The month with the least sunshine days is February (10.1 days).
Average UV index in September
Riverton, MN
- 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 1).
Average cloud cover in September
Riverton, MN
- Average cloud cover in September: 40
The month with the most cloud cover is January (Cloud cover 76).
The month with the least cloud cover is July (Cloud cover 35).
Average visibility in September
Riverton, MN
- Average visibility in September: 5mi
The months with the highest visibility are May, June and October (6mi).
The months with the lowest visibility are January, February, March and December (4mi).
Riverton, Minnesota, USA
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