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
September brings a slight decrease in the average high-temperature, shifting from a warm 74.5°F (23.6°C) in August to a comfortable 67.6°F (19.8°C). During the month of September, Porterfield's nighttime temperature lowers to an average of 54.1°F (12.3°C).Humidity
In Porterfield, the average relative humidity in September is 79%.Rainfall
In Porterfield, in September, during 12.1 rainfall days, 2.09" (53mm) of precipitation is typically accumulated. In Porterfield, Wisconsin, during the entire year, the rain falls for 129.7 days and collects up to 25.04" (636mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 31min.On the first day of September in Porterfield, sunrise is at 6:13 am and sunset at 7:27 pm. On the last day of the month, sunrise is at 6:48 am and sunset at 6:32 pm CDT.
Sunshine
In Porterfield, the average sunshine in September is 8.8h.UV index
In Porterfield, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The maximum UV index of 4 during September translates into these guidelines:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Porterfield in September?
What is the average humidity in September in Porterfield?
How much does it rain in Porterfield in September?
When it does not snow in Porterfield?
Does it snow in Porterfield in September?
How many hours of daylight does Porterfield have in September?
What time are sunrise and sunset in September in Porterfield?
How long on average sun shines in September in Porterfield?
What is the UV index reading in September in Porterfield?
Average temperature in September
Porterfield, WI
- Average high temperature in September: 67.6°F
The warmest month (with the highest average high temperature) is August (74.5°F).
The month with the lowest average high temperature is January (23.5°F).
- Average low temperature in September: 54.1°F
The months with the highest average low temperature are July and August (59.9°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).
Average pressure in September
Porterfield, WI
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Porterfield, WI
- Average wind speed in September: 8.9mph
The windiest months (with the highest average wind speed) are November and December (10.9mph).
The calmest month (with the lowest average wind speed) is July (7.6mph).
Average humidity in September
Porterfield, WI
- Average humidity in September: 79%
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are April and November (76%).
Average rainfall in September
Porterfield, WI
- Average rainfall in September: 2.09"
The wettest months (with the highest rainfall) are May, June and October (2.8").
The driest month (with the least rainfall) is January (1.06").
Average rainfall days in September
Porterfield, WI
- Average rainfall days in September: 12.1 days
The month with the highest number of rainy days is May (15.5 days).
The month with the least rainy days is February (4.1 days).
Average snowfall in September
Porterfield, WI
- Average snowfall in September: 0"
The month with the highest snowfall is February (5.39").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Porterfield, WI
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (12.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Porterfield, 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 5min
The months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 3h and 18min).
Average sunshine days in September
Porterfield, WI
- Average sunshine days in September: 15.9 days
The month with the most sunshine days is November (16.6 days).
The month with the least sunshine days is April (12.4 days).
Average UV index in September
Porterfield, WI
- 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 and December (UV index 1).
Average cloud cover in September
Porterfield, WI
- Average cloud cover in September: 32
The month with the most cloud cover is February (Cloud cover 65).
The months with the least cloud cover are July and August (Cloud cover 30).
Average visibility in September
Porterfield, WI
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Porterfield, Wisconsin, USA
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