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 entails a subtle temperature shift, as the average high-temperature eases from 84.4°F (29.1°C) in August to a still moderately hot 75.9°F (24.4°C). Manville reports a sharp reduction in temperature during September, averaging at a fresh 53.6°F (12°C) at night.Humidity
The average relative humidity in September is 41%.Rainfall
In Manville, during September, the rain falls for 7.3 days and regularly aggregates up to 0.63" (16mm) of precipitation. In Manville, during the entire year, the rain falls for 84.9 days and collects up to 9.76" (248mm) of precipitation.Snowfall
Months with snowfall in Manville, Wyoming, are January through May, September through December. September is the first month it typically snows in Manville. Throughout September, in the average 0.3 snowfall days, it receives 0.71" (18mm) of snow. In Manville, Wyoming, during the entire year, snow falls for 43 days and aggregates up to 18.27" (464mm) of snow.Daylight
The average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 6:24 am and sunset at 7:32 pm. On the last day of September, sunrise is at 6:55 am and sunset at 6:40 pm MDT.
Sunshine
The average sunshine in September is 10.7h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Guard yourself - An obligation to protect skin and eyes from harm exists. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Frequently asked questions
What are September temperatures in Manville?
What is the average humidity in September in Manville?
How much does it rain in Manville in September?
When does it start snowing in Manville?
What is the average length of the day in September in Manville?
What time are sunrise and sunset in September in Manville?
How long on average sun shines in September in Manville?
What is the UV index intensity in September in Manville?
Average temperature in September
Manville, WY
- Average high temperature in September: 75.9°F
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is December (33.8°F).
- Average low temperature in September: 53.6°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is December (19.2°F).
Average pressure in September
Manville, WY
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Manville, WY
- Average wind speed in September: 9.8mph
The windiest month (with the highest average wind speed) is April (11.6mph).
The calmest month (with the lowest average wind speed) is August (8.9mph).
Average humidity in September
Manville, WY
- Average humidity in September: 41%
The month with the highest relative humidity is February (70%).
The month with the lowest relative humidity is August (40%).
Average rainfall in September
Manville, WY
- Average rainfall in September: 0.63"
The wettest month (with the highest rainfall) is May (1.93").
The driest month (with the least rainfall) is January (0.31").
Average rainfall days in September
Manville, WY
- Average rainfall days in September: 7.3 days
The month with the highest number of rainy days is May (12.4 days).
The month with the least rainy days is February (2.8 days).
Average snowfall in September
Manville, WY
- Average snowfall in September: 0.71"
The month with the highest snowfall is November (2.8").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Manville, WY
- Average snowfall days in September: 0.3 days
The month with the highest number of snowfall days is February (8.4 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Manville, 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: 10h and 4min
The months with the most sunshine are July and August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 6h and 24min).
Average sunshine days in September
Manville, WY
- Average sunshine days in September: 20 days
The month with the most sunshine days is December (21.7 days).
The month with the least sunshine days is April (14.5 days).
Average UV index in September
Manville, 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, November and December (UV index 2).
Average cloud cover in September
Manville, WY
- Average cloud cover in September: 17
The month with the most cloud cover is February (Cloud cover 33).
The month with the least cloud cover is August (Cloud cover 15).
Average visibility in September
Manville, 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).
Manville, Wyoming, USA
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