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 indicates a shift in the average high-temperature, from August's warm 79.9°F (26.6°C) to a pleasant 69.3°F (20.7°C). In September, the average low-temperature is a fresh 51.3°F (10.7°C).Humidity
In September, the average relative humidity in Walhalla is 62%.Rainfall
In Walhalla, during September, the rain falls for 9.6 days and regularly aggregates up to 1.65" (42mm) of precipitation. Throughout the year, in Walhalla, there are 101.7 rainfall days, and 14.96" (380mm) of precipitation is accumulated.Snowfall
Months with snowfall in Walhalla are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, there are 73.1 snowfall days, and 18.07" (459mm) of snow is accumulated.Daylight
The average length of the day in September is 12h and 34min.On the first day of the month, sunrise is at 6:49 am and sunset at 8:13 pm. On the last day of September, in Walhalla, sunrise is at 7:30 am and sunset at 7:11 pm CDT.
Sunshine
The average sunshine in September is 8.8h.UV index
In Walhalla, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: A daily maximum UV index of 4 in September translates into the following instructions:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Walhalla?
What is the average humidity in September in Walhalla?
How much does it rain in Walhalla in September?
When does it start to snow in Walhalla?
How many hours of daylight does Walhalla have in September?
What time are sunrise and sunset in September in Walhalla?
How many hours of sunshine does Walhalla have in September?
What is the UV index reading in September in Walhalla?
Average temperature in September
Walhalla, ND
- Average high temperature in September: 69.3°F
The warmest month (with the highest average high temperature) is August (79.9°F).
The month with the lowest average high temperature is January (14.2°F).
- Average low temperature in September: 51.3°F
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (0.9°F).
Average pressure in September
Walhalla, ND
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Walhalla, ND
- Average wind speed in September: 9.6mph
The windiest month (with the highest average wind speed) is October (10.4mph).
The calmest month (with the lowest average wind speed) is August (8.1mph).
Average humidity in September
Walhalla, ND
- Average humidity in September: 62%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is August (59%).
Average rainfall in September
Walhalla, ND
- Average rainfall in September: 1.65"
The wettest month (with the highest rainfall) is June (2.56").
The driest month (with the least rainfall) is February (0.51").
Average rainfall days in September
Walhalla, ND
- Average rainfall days in September: 9.6 days
The month with the highest number of rainy days is June (16.5 days).
The month with the least rainy days is February (2 days).
Average snowfall in September
Walhalla, ND
- Average snowfall in September: 0.04"
The month with the highest snowfall is December (3.43").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Walhalla, ND
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (14.4 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Walhalla, ND
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in September
Walhalla, ND
- Average sunshine days in September: 18.5 days
The month with the most sunshine days is August (19.2 days).
The month with the least sunshine days is June (10.3 days).
Average UV index in September
Walhalla, ND
- 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
Walhalla, ND
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 24).
Average visibility in September
Walhalla, ND
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
Walhalla, North Dakota, USA
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