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
In September, the average high-temperature marginally decreases from a moderately hot 77.5°F (25.3°C) in August to a pleasant 71.2°F (21.8°C). Blue Mounds's average low-temperature for the month of September records at a cool 51.8°F (11°C).Humidity
In September, the average relative humidity is 81%.Rainfall
In Blue Mounds, during September, the rain falls for 11.8 days and regularly aggregates up to 2.36" (60mm) of precipitation. In Blue Mounds, during the entire year, the rain falls for 128 days and collects up to 22.68" (576mm) of precipitation.Snowfall
In Blue Mounds, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 29min.On the first day of September, sunrise is at 6:24 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 6:41 pm CDT.
Sunshine
The average sunshine in September is 8.5h.UV index
In September, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum UV index, 3 during September, leads to the following recommendations:
Act with care - The need to guard against sun damage is communicated. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Frequently asked questions
What are September temperatures in Blue Mounds?
What is the average humidity in September in Blue Mounds?
How many days does it rain in September in Blue Mounds?
When it does not snow in Blue Mounds?
Does it snow in Blue Mounds in September?
How many hours of daylight does Blue Mounds have in September?
What time are sunrise and sunset in September in Blue Mounds?
How long on average sun shines in September in Blue Mounds?
What is the UV index reading in September in Blue Mounds?
Average temperature in September
Blue Mounds, WI
- Average high temperature in September: 71.2°F
The warmest month (with the highest average high temperature) is July (78.6°F).
The month with the lowest average high temperature is January (23.5°F).
- Average low temperature in September: 51.8°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (10.9°F).
Average pressure in September
Blue Mounds, WI
- Average pressure in September: 30.03"Hg
The months with the highest atmospheric pressure are January and February (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Blue Mounds, WI
- Average wind speed in September: 7.5mph
The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in September
Blue Mounds, WI
- Average humidity in September: 81%
The month with the highest relative humidity is January (89%).
The months with the lowest relative humidity are April, October and November (78%).
Average rainfall in September
Blue Mounds, WI
- Average rainfall in September: 2.36"
The wettest month (with the highest rainfall) is June (3.35").
The driest month (with the least rainfall) is January (0.79").
Average rainfall days in September
Blue Mounds, WI
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is June (17.7 days).
The month with the least rainy days is February (3.1 days).
Average snowfall in September
Blue Mounds, WI
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.25").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Blue Mounds, WI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Blue Mounds, WI
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 8h and 3min
The month with the most sunshine is July (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days in September
Blue Mounds, WI
- Average sunshine days in September: 16.7 days
The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is June (9.8 days).
Average UV index in September
Blue Mounds, 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, November and December (UV index 1).
Average cloud cover in September
Blue Mounds, WI
- Average cloud cover in September: 36
The month with the most cloud cover is January (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in September
Blue Mounds, WI
- Average visibility in September: 5mi
The months with the highest visibility are March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, February, July, August and September (5mi).
Blue Mounds, Wisconsin, USA
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