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
With the arrival of September, Boulder Junction notices a mild change in the average high-temperature, sliding from August's moderately hot 74.7°F (23.7°C) to a comfortable 66.9°F (19.4°C). In the month of September, the average temperature dips to a frosty 48.6°F (9.2°C) during the night.Humidity
In September, the average relative humidity is 80%.Rainfall
In September, in Boulder Junction, the rain falls for 14.2 days. Throughout September, 1.69" (43mm) of precipitation is accumulated. Throughout the year, there are 128.5 rainfall days, and 24.76" (629mm) of precipitation is accumulated.Snowfall
In Boulder Junction, Wisconsin, snow does not fall in June through September.Daylight
In Boulder Junction, the average length of the day in September is 12h and 32min.On the first day of the month, sunrise is at 6:20 am and sunset at 7:36 pm. On the last day of September, in Boulder Junction, Wisconsin, sunrise is at 6:56 am and sunset at 6:39 pm CDT.
Sunshine
The average sunshine in September in Boulder Junction is 7.9h.UV index
In September, the average daily maximum UV index in Boulder Junction is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum UV index of 3 during September translates into these guidelines:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Always opt for UVA and UVB-resistant sunglasses on radiant days. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Boulder Junction?
What is the average humidity in September in Boulder Junction?
How many days does it rain in September in Boulder Junction?
When it does not snow in Boulder Junction?
Does it snow in Boulder Junction in September?
What is the average length of the day in September in Boulder Junction?
When is the sunrise / sunset in September in Boulder Junction?
How long on average sun shines in September in Boulder Junction?
What is the UV index reading in September in Boulder Junction?
Average temperature in September
Boulder Junction, WI
- Average high temperature in September: 66.9°F
The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is January (18.5°F).
- Average low temperature in September: 48.6°F
The month with the highest average low temperature is July (56.3°F).
The coldest month (with the lowest average low temperature) is January (7.9°F).
Average pressure in September
Boulder Junction, WI
- Average pressure in September: 30.01"Hg
The months with the highest atmospheric pressure are February and March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Boulder Junction, WI
- Average wind speed in September: 7.5mph
The windiest month (with the highest average wind speed) is November (8.7mph).
The calmest month (with the lowest average wind speed) is August (6.8mph).
Average humidity in September
Boulder Junction, WI
- Average humidity in September: 80%
The months with the highest relative humidity are January and February (92%).
The month with the lowest relative humidity is May (71%).
Average rainfall in September
Boulder Junction, WI
- Average rainfall in September: 1.69"
The wettest month (with the highest rainfall) is May (2.95").
The driest month (with the least rainfall) is January (1.38").
Average rainfall days in September
Boulder Junction, WI
- Average rainfall days in September: 14.2 days
The month with the highest number of rainy days is June (15.8 days).
The month with the least rainy days is February (2.7 days).
Average snowfall in September
Boulder Junction, WI
- Average snowfall in September: 0"
The month with the highest snowfall is December (11.18").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Boulder Junction, WI
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (26.7 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Boulder Junction, WI
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 7h and 5min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 1h and 54min).
Average sunshine days in September
Boulder Junction, WI
- Average sunshine days in September: 13.4 days
The month with the most sunshine days is September (13.4 days).
The month with the least sunshine days is January (5 days).
Average UV index in September
Boulder Junction, 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, March, November and December (UV index 1).
Average cloud cover in September
Boulder Junction, WI
- Average cloud cover in September: 44
The month with the most cloud cover is January (Cloud cover 83).
The month with the least cloud cover is July (Cloud cover 37).
Average visibility in September
Boulder Junction, WI
- Average visibility in September: 5mi
The months with the highest visibility are May, June and July (6mi).
The months with the lowest visibility are January, February, March and December (4mi).
Boulder Junction, Wisconsin, USA
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