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
The onset of September entails a subtle temperature shift, as the average high-temperature eases from a warm 77.7°F (25.4°C) in August to an agreeable 72.3°F (22.4°C). In Janesville, the average temperature during the nights of September drops to a fresh 52.9°F (11.6°C).Humidity
The average relative humidity in September is 76%.Rainfall
In Janesville, during September, the rain falls for 11.6 days and regularly aggregates up to 2.05" (52mm) of precipitation. In Janesville, during the entire year, the rain falls for 124.8 days and collects up to 24.25" (616mm) of precipitation.Snowfall
In Janesville, snow does not fall in June through September.Daylight
In Janesville, the average length of the day in September is 12h and 30min.On the first day of September, sunrise is at 6:38 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 6:56 pm CDT.
Sunshine
The average sunshine in September in Janesville is 8.9h.UV index
In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: In September, the average maximum UV index of 4 translates into the following recommendations:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Boost your sun resistance with garments that are densely woven yet spacious.
Frequently asked questions
What is the usual temperature for Janesville in September?
What is the average humidity in September in Janesville?
How much does it rain in Janesville in September?
When it does not snow in Janesville?
Does it snow in Janesville in September?
How many hours of daylight does Janesville have in September?
When are sunrise and sunset in September in Janesville?
How many hours of sunshine does Janesville have in September?
How high is the UV index in September in Janesville?
Average temperature in September
Janesville, MN
- Average high temperature in September: 72.3°F
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (21.2°F).
- Average low temperature in September: 52.9°F
The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is January (7.7°F).
Average pressure in September
Janesville, MN
- Average pressure in September: 30"Hg
The months with the highest atmospheric pressure are January and February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Janesville, MN
- Average wind speed in September: 8.4mph
The windiest month (with the highest average wind speed) is April (10mph).
The calmest month (with the lowest average wind speed) is July (7.2mph).
Average humidity in September
Janesville, MN
- Average humidity in September: 76%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Janesville, MN
- Average rainfall in September: 2.05"
The wettest month (with the highest rainfall) is June (3.9").
The driest month (with the least rainfall) is January (0.75").
Average rainfall days in September
Janesville, MN
- Average rainfall days in September: 11.6 days
The month with the highest number of rainy days is June (17.5 days).
The month with the least rainy days is February (1.7 days).
Average snowfall in September
Janesville, MN
- Average snowfall in September: 0"
The month with the highest snowfall is February (6.26").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Janesville, MN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Janesville, MN
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in September
Janesville, MN
- Average sunshine days in September: 16.2 days
The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in September
Janesville, 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, February, November and December (UV index 1).
Average cloud cover in September
Janesville, MN
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Janesville, MN
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
Janesville, Minnesota, USA
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