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
Transitioning from August to September involves a subtle drop in average high-temperatures, descending from a moderately hot 76.6°F (24.8°C) to an agreeable 70.2°F (21.2°C). Nighttime temperature in Spring Valley lowers to an average of 50.9°F (10.5°C) in September.Humidity
In September, the average relative humidity is 79%.Rainfall
In Spring Valley, in September, it is raining for 12.3 days, with typically 2.2" (56mm) of accumulated precipitation. Throughout the year, there are 128.4 rainfall days, and 25" (635mm) of precipitation is accumulated.Snowfall
In Spring Valley, snow does not fall in June through September.Daylight
In September, the average length of the day in Spring Valley is 12h and 31min.On the first day of September in Spring Valley, Wisconsin, sunrise is at 6:32 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 6:50 pm CDT.
Sunshine
In September, the average sunshine in Spring Valley is 8.6h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: The UV index of 4 in September translates into these instructions:
Undertake precautions - Obligation exists to protect against skin and eye damage. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Spring Valley?
What is the average humidity in September in Spring Valley?
How much does it rain in Spring Valley in September?
When it does not snow in Spring Valley?
Does it snow in Spring Valley in September?
What is the average length of the day in September in Spring Valley?
What time are sunrise and sunset in September in Spring Valley?
How long on average sun shines in September in Spring Valley?
How high is the UV index in September in Spring Valley?
Average temperature in September
Spring Valley, WI
- Average high temperature in September: 70.2°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (19.2°F).
- Average low temperature in September: 50.9°F
The month with the highest average low temperature is July (61°F).
The coldest month (with the lowest average low temperature) is January (6.1°F).
Average pressure in September
Spring Valley, WI
- Average pressure in September: 30"Hg
The months with the highest atmospheric pressure are January and February (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Spring Valley, WI
- Average wind speed in September: 7.6mph
The windiest month (with the highest average wind speed) is April (9.4mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).
Average humidity in September
Spring Valley, WI
- Average humidity in September: 79%
The month with the highest relative humidity is January (91%).
The months with the lowest relative humidity are April and October (76%).
Average rainfall in September
Spring Valley, WI
- Average rainfall in September: 2.2"
The wettest month (with the highest rainfall) is June (4.37").
The driest month (with the least rainfall) is January (0.75").
Average rainfall days in September
Spring Valley, WI
- Average rainfall days in September: 12.3 days
The month with the highest number of rainy days is June (17.8 days).
The month with the least rainy days is January (2.7 days).
Average snowfall in September
Spring Valley, WI
- Average snowfall in September: 0"
The month with the highest snowfall is February (6.18").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Spring Valley, WI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Spring Valley, WI
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in September
Spring Valley, WI
- Average sunshine days in September: 15.7 days
The month with the most sunshine days is December (17.2 days).
The month with the least sunshine days is June (10.5 days).
Average UV index in September
Spring Valley, WI
- Average UV index in September: 4
The month with the highest UV index is 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
Spring Valley, WI
- Average cloud cover in September: 36
The month with the most cloud cover is January (Cloud cover 68).
The months with the least cloud cover are July and August (Cloud cover 33).
Average visibility in September
Spring Valley, WI
- Average visibility in September: 5mi
The months with the highest visibility are April, May, June, July, October and November (6mi).
The month with the lowest visibility is January (4mi).
Spring Valley, Wisconsin, USA
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