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
The onset of September comes with a shift in the average high-temperature, falling from a moderately hot 82.6°F (28.1°C) in August to an agreeable 73.2°F (22.9°C). The temperature lowers to an average of 53.8°F (12.1°C) during September nights.Humidity
In Manderson, the average relative humidity in September is 36%.Rainfall
In Manderson, in September, it is raining for 6.6 days, with typically 0.71" (18mm) of accumulated precipitation. Throughout the year, there are 103.2 rainfall days, and 5.71" (145mm) of precipitation is accumulated.Snowfall
In Manderson, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 30min.On the first day of the month, sunrise is at 6:35 am and sunset at 7:47 pm. On the last day of September, sunrise is at 7:09 am and sunset at 6:53 pm MDT.
Sunshine
The average sunshine in September is 10.9h.UV index
In Manderson, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: In September, a daily UV index of 4 turns into the following recommendations:
Put precautions into practice - Protective measures against sun-induced damage are advised. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. To cut down UV radiation exposure by about half, sport a wide-brim hat. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Manderson in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Manderson have in September?
When are sunrise and sunset in September in Manderson?
How many hours of sunshine does Manderson have in September?
How high is the UV index in September?
Average temperature in September
Manderson, WY
- Average high temperature in September: 73.2°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 (28.8°F).
- Average low temperature in September: 53.8°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (13.8°F).
Average pressure in September
Manderson, WY
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Manderson, WY
- Average wind speed in September: 6.6mph
The windiest month (with the highest average wind speed) is April (8.3mph).
The calmest months (with the lowest average wind speed) are January and August (6mph).
Average humidity in September
Manderson, WY
- Average humidity in September: 36%
The month with the highest relative humidity is January (78%).
The months with the lowest relative humidity are July and August (33%).
Average rainfall in September
Manderson, WY
- Average rainfall in September: 0.71"
The wettest month (with the highest rainfall) is May (0.87").
The driest month (with the least rainfall) is December (0.2").
Average rainfall days in September
Manderson, WY
- Average rainfall days in September: 6.6 days
The month with the highest number of rainy days is May (12.6 days).
The month with the least rainy days is December (6.5 days).
Average snowfall in September
Manderson, WY
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.52").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Manderson, WY
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (9.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Manderson, WY
- 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: 10h and 5min
The months with the most sunshine are June, July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 6h and 42min).
Average sunshine days in September
Manderson, WY
- Average sunshine days in September: 18.5 days
The month with the most sunshine days is December (20.9 days).
The months with the least sunshine days are April and June (12.5 days).
Average UV index in September
Manderson, 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, November and December (UV index 2).
Average cloud cover in September
Manderson, WY
- Average cloud cover in September: 13
The month with the most cloud cover is February (Cloud cover 28).
The months with the least cloud cover are July and August (Cloud cover 12).
Average visibility in September
Manderson, 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).
Manderson, Wyoming, USA
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