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 Waltman, entering September brings a temperature decrement, reducing from August's warm 82.6°F (28.1°C) to a still moderately hot 73.4°F (23°C). During the month of September, the temperature falls to an average of 52.3°F (11.3°C).Humidity
In Waltman, the average relative humidity in September is 38%.Rainfall
In Waltman, during September, the rain falls for 6.6 days and regularly aggregates up to 0.39" (10mm) of precipitation. Throughout the year, in Waltman, Wyoming, there are 81 rainfall days, and 8.98" (228mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.2 snowfall days, it receives 0.08" (2mm) of snow. In Waltman, during the entire year, snow falls for 62.6 days and aggregates up to 31.65" (804mm) of snow.Daylight
In September, the average length of the day is 12h and 29min.On the first day of September, sunrise is at 6:34 am and sunset at 7:42 pm. On the last day of the month, sunrise is at 7:05 am and sunset at 6:51 pm MDT.
Sunshine
In September, the average sunshine is 11h.UV index
The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the average person.Note: The daily maximum UV index of 4 in September interprets into the following advice:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Waltman in September?
What is the average humidity in September?
How much does it rain in September?
When does it start snowing?
How many hours of daylight does Waltman have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Waltman have in September?
What is the UV index intensity in September?
Average temperature in September
Waltman, WY
- Average high temperature in September: 73.4°F
The warmest month (with the highest average high temperature) is July (85.1°F).
The month with the lowest average high temperature is December (28.6°F).
- Average low temperature in September: 52.3°F
The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is December (15.1°F).
Average pressure in September
Waltman, WY
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Waltman, WY
- Average wind speed in September: 9.3mph
The windiest month (with the highest average wind speed) is January (11.9mph).
The calmest month (with the lowest average wind speed) is August (8.4mph).
Average humidity in September
Waltman, WY
- Average humidity in September: 38%
The month with the highest relative humidity is January (79%).
The month with the lowest relative humidity is August (36%).
Average rainfall in September
Waltman, WY
- Average rainfall in September: 0.39"
The wettest month (with the highest rainfall) is May (1.34").
The driest month (with the least rainfall) is August (0.35").
Average rainfall days in September
Waltman, WY
- Average rainfall days in September: 6.6 days
The month with the highest number of rainy days is May (10.9 days).
The month with the least rainy days is December (3.3 days).
Average snowfall in September
Waltman, WY
- Average snowfall in September: 0.08"
The month with the highest snowfall is March (5.55").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Waltman, WY
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is February (11.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Waltman, WY
- 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: 11h and 0min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is February (Average sunshine: 6h and 12min).
Average sunshine days in September
Waltman, WY
- Average sunshine days in September: 20.1 days
The month with the most sunshine days is August (20.3 days).
The month with the least sunshine days is April (13.6 days).
Average UV index in September
Waltman, WY
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in September
Waltman, WY
- Average cloud cover in September: 14
The month with the most cloud cover is February (Cloud cover 34).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility in September
Waltman, WY
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Waltman, Wyoming, USA
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