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
As September arrives, Walnut Grove's weather displays a minor decrease in high-temperatures, transitioning from August's warm 78.8°F (26°C) to an agreeable 72.5°F (22.5°C). Walnut Grove throughout September, experiences an average nighttime temperature of 53.2°F (11.8°C).Humidity
In September, the average relative humidity is 71%.Rainfall
In Walnut Grove, in September, during 10.5 rainfall days, 1.65" (42mm) of precipitation is typically accumulated. In Walnut Grove, during the entire year, the rain falls for 110.5 days and collects up to 18.23" (463mm) of precipitation.Snowfall
In Walnut Grove, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 30min.On the first day of the month, sunrise is at 6:45 am and sunset at 7:57 pm. On the last day of September, in Walnut Grove, Minnesota, sunrise is at 7:19 am and sunset at 7:03 pm CDT.
Sunshine
The average sunshine in September is 9.2h.UV index
In Walnut Grove, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard 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:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. To protect against the Sun's most potent rays, avoid direct exposure around midday. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Walnut Grove have in September?
When is the sunrise / sunset in September in Walnut Grove?
How many hours of sunshine does Walnut Grove have in September?
How high is the UV index in September?
Average temperature in September
Walnut Grove, MN
- Average high temperature in September: 72.5°F
The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (20.8°F).
- Average low temperature in September: 53.2°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (7.7°F).
Average pressure in September
Walnut Grove, MN
- Average pressure in September: 29.99"Hg
The months with the highest atmospheric pressure are January and February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Walnut Grove, MN
- Average wind speed in September: 9.3mph
The windiest months (with the highest average wind speed) are February and April (10.9mph).
The calmest month (with the lowest average wind speed) is July (7.8mph).
Average humidity in September
Walnut Grove, MN
- Average humidity in September: 71%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is October (67%).
Average rainfall in September
Walnut Grove, MN
- Average rainfall in September: 1.65"
The wettest month (with the highest rainfall) is June (2.72").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days in September
Walnut Grove, MN
- Average rainfall days in September: 10.5 days
The month with the highest number of rainy days is June (16.7 days).
The month with the least rainy days is February (1.7 days).
Average snowfall in September
Walnut Grove, MN
- Average snowfall in September: 0"
The month with the highest snowfall is February (5.16").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Walnut Grove, MN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (11.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Walnut Grove, MN
- 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: 9h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in September
Walnut Grove, MN
- Average sunshine days in September: 18 days
The month with the most sunshine days is November (20 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in September
Walnut Grove, MN
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February and November (UV index 1).
Average cloud cover in September
Walnut Grove, MN
- Average cloud cover in September: 29
The month with the most cloud cover is January (Cloud cover 59).
The months with the least cloud cover are July, August and September (Cloud cover 29).
Average visibility in September
Walnut Grove, MN
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Walnut Grove, Minnesota, USA
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