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
Start of September brings a slight shift in the average high-temperature, dipping a bit from August's moderately hot 75.4°F (24.1°C) to an agreeable 68.4°F (20.2°C). The average low-temperature in Dorchester during September nights is a chilly 49.1°F (9.5°C).Humidity
In Dorchester, Wisconsin, the average relative humidity in September is 81%.Rainfall
In September, the rain falls for 9.3 days. Throughout September, 0.87" (22mm) of precipitation is accumulated. Throughout the year, in Dorchester, there are 102.5 rainfall days, and 11.18" (284mm) of precipitation is accumulated.Snowfall
In Dorchester, snow does not fall in June through September.Daylight
In September, the average length of the day in Dorchester is 12h and 31min.On the first day of the month, sunrise is at 6:24 am and sunset at 7:37 pm. On the last day of September, sunrise is at 6:59 am and sunset at 6:43 pm CDT.
Sunshine
The average sunshine in September in Dorchester is 8.2h.UV index
The average daily maximum UV index in September in Dorchester is 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: In September, the maximum UV index of 3 suggests this advice:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Dorchester in September?
What is the average humidity in September in Dorchester?
How many days does it rain in September in Dorchester?
When it does not snow in Dorchester?
Does it snow in Dorchester in September?
How many hours of daylight does Dorchester have in September?
What time are sunrise and sunset in September in Dorchester?
How long on average sun shines in September in Dorchester?
How high is the UV index in September in Dorchester?
Average temperature in September
Dorchester, WI
- Average high temperature in September: 68.4°F
The warmest month (with the highest average high temperature) is July (76.8°F).
The month with the lowest average high temperature is January (18.9°F).
- Average low temperature in September: 49.1°F
The month with the highest average low temperature is July (58.5°F).
The coldest month (with the lowest average low temperature) is January (6.4°F).
Average pressure in September
Dorchester, WI
- Average pressure in September: 30.01"Hg
The months with the highest atmospheric pressure are January and February (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Dorchester, WI
- Average wind speed in September: 7.9mph
The windiest month (with the highest average wind speed) is April (9.6mph).
The calmest month (with the lowest average wind speed) is August (7mph).
Average humidity in September
Dorchester, WI
- Average humidity in September: 81%
The months with the highest relative humidity are January and February (92%).
The months with the lowest relative humidity are April and May (78%).
Average rainfall in September
Dorchester, WI
- Average rainfall in September: 0.87"
The wettest month (with the highest rainfall) is June (1.61").
The driest month (with the least rainfall) is January (0.35").
Average rainfall days in September
Dorchester, WI
- Average rainfall days in September: 9.3 days
The month with the highest number of rainy days is May (14.8 days).
The month with the least rainy days is January (1.5 days).
Average snowfall in September
Dorchester, WI
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.52").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Dorchester, WI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Dorchester, WI
- Average daylight in September: 12h and 3min
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: 8h and 1min
The month with the most sunshine is July (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 2h and 42min).
Average sunshine days in September
Dorchester, WI
- Average sunshine days in September: 18.8 days
The month with the most sunshine days is January (20.1 days).
The month with the least sunshine days is June (12.4 days).
Average UV index in September
Dorchester, WI
- Average UV index in September: 3
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
Dorchester, WI
- Average cloud cover in September: 40
The month with the most cloud cover is January (Cloud cover 74).
The months with the least cloud cover are July and August (Cloud cover 37).
Average visibility in September
Dorchester, WI
- Average visibility in September: 5mi
The months with the highest visibility are April, May, June, October and November (6mi).
The months with the lowest visibility are January, February, March, July, August, September and December (5mi).
Dorchester, Wisconsin, USA
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