September weather forecastGranite, WY
September
Weather in September
The first month of the autumn, September, is still a warm month in Granite, Wyoming, with an average temperature varying between 52.2°F (11.2°C) and 73.8°F (23.2°C).Temperature
September brings a minor shift in the average high-temperature, adjusting from 81.1°F (27.3°C) in August to a still moderately hot 73.8°F (23.2°C). During September, Granite reports a marked contrast from daily peak temperatures, with an average nighttime reading of 52.2°F (11.2°C).Humidity
The months with the lowest humidity are August and September, with an average relative humidity of 43%.Rainfall
In Granite, Wyoming, in September, during 8.2 rainfall days, 0.91" (23mm) of precipitation is typically accumulated. In Granite, during the entire year, the rain falls for 115.8 days and collects up to 14.61" (371mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 0.4 snowfall days, it receives 0.08" (2mm) of snow. In Granite, during the entire year, snow falls for 62.3 days and aggregates up to 30.59" (777mm) of snow.Daylight
In September, the average length of the day is 12h and 27min.On the first day of the month, sunrise is at 6:28 am and sunset at 7:32 pm. On the last day of September, sunrise is at 6:57 am and sunset at 6:43 pm MDT.
Sunshine
In September, the average sunshine is 10.6h.UV index
In Granite, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The daily maximum UV index of 4 in September interprets into the following advice:
Take precautions - Protection against sunburn is recommended. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. 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
Average temperature in September
Granite, WY
- Average high temperature in September: 73.8°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is December (34.7°F).
- Average low temperature in September: 52.2°F
The month with the highest average low temperature is July (59.9°F).
The coldest month (with the lowest average low temperature) is December (20.3°F).
Average pressure in September
Granite, WY
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Granite, WY
- Average wind speed in September: 9.8mph
The windiest month (with the highest average wind speed) is January (14.2mph).
The calmest month (with the lowest average wind speed) is August (8.7mph).
Average humidity in September
Granite, WY
- Average humidity in September: 43%
The month with the highest relative humidity is February (64%).
The months with the lowest relative humidity are August and September (43%).
Average rainfall in September
Granite, WY
- Average rainfall in September: 0.91"
The wettest month (with the highest rainfall) is May (2.95").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days in September
Granite, WY
- Average rainfall days in September: 8.2 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (4.7 days).
Average snowfall in September
Granite, WY
- Average snowfall in September: 0.08"
The month with the highest snowfall is March (6.06").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Granite, WY
- Average snowfall days in September: 0.4 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
Granite, WY
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 10h and 36min
The months with the most sunshine are July and August (Average sunshine: 11h and 36min).
The month with the least sunshine is February (Average sunshine: 6h and 30min).
Average sunshine days in September
Granite, WY
- Average sunshine days in September: 19.3 days
The month with the most sunshine days is January (20.7 days).
The month with the least sunshine days is April (9.3 days).
Average UV index in September
Granite, WY
- Average UV index in September: 4
The months with the highest UV index are 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
Granite, WY
- Average cloud cover in September: 18
The months with the most cloud cover are April and May (Cloud cover 32).
The month with the least cloud cover is September (Cloud cover 18).
Average visibility in September
Granite, 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).
