September weather forecastMountain City, NV
September
Weather in September
September in Mountain City invokes the onset of fall, mildly lowering temperatures and reduced daylight hours. Visible signs of autumn emerge with the first 0.35" (9mm) of snowfall after the summer hiatus. The weather continues to be dry, and the reduction in daylight and sun hours is gradual. The shorter days and longer nights herald the impending arrival of winter. By the end of September, there is a sense of anticipation for the vivid autumn hues soon to adorn Mountain City.Temperature
Stepping into September, Mountain City observes a temperature decline, with the average high falling from August's moderately hot 79°F (26.1°C) to a pleasant 69.1°F (20.6°C). An average low-temperature of 48.2°F (9°C) marks the nights throughout September.Humidity
The average relative humidity in September in Mountain City is 37%.Rainfall
In Mountain City, in September, during 7.4 rainfall days, 0.67" (17mm) of precipitation is typically accumulated. In Mountain City, Nevada, during the entire year, the rain falls for 92.8 days and collects up to 15.2" (386mm) of precipitation.Snowfall
January through June, September through December are months with snowfall. September is the first month it typically snows in Mountain City. Throughout September, in the average 0.6 snowfall days, it receives 0.35" (9mm) of snow. Throughout the year, in Mountain City, there are 94.1 snowfall days, and 71.42" (1814mm) of snow is accumulated.Daylight
In Mountain City, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:10 am and sunset at 7:16 pm. On the last day of the month, sunrise is at 6:40 am and sunset at 6:26 pm PDT.
Sunshine
In September, the average sunshine is 10.2h.UV index
In Mountain City, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for average individuals.Note: The UV index of 4 during September translates into the following guidance:
Put precautions into practice - Protective measures against sun-induced damage are advised. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Mountain City, NV
- Average high temperature in September: 69.1°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is December (28.4°F).
- Average low temperature in September: 48.2°F
The month with the highest average low temperature is July (55.2°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).
Average pressure in September
Mountain City, NV
- Average pressure in September: 29.92"Hg
The month with the highest atmospheric pressure is January (30.26"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in September
Mountain City, NV
- Average wind speed in September: 6.5mph
The windiest month (with the highest average wind speed) is April (8.2mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in September
Mountain City, NV
- Average humidity in September: 37%
The months with the highest relative humidity are January and February (84%).
The month with the lowest relative humidity is August (31%).
Average rainfall in September
Mountain City, NV
- Average rainfall in September: 0.67"
The wettest month (with the highest rainfall) is December (2.05").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in September
Mountain City, NV
- Average rainfall days in September: 7.4 days
The month with the highest number of rainy days is May (12.3 days).
The month with the least rainy days is December (5 days).
Average snowfall in September
Mountain City, NV
- Average snowfall in September: 0.35"
The month with the highest snowfall is December (14.69").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Mountain City, NV
- Average snowfall days in September: 0.6 days
The month with the highest number of snowfall days is December (17.1 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Mountain City, NV
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 10h and 12min
The month with the most sunshine is August (Average sunshine: 12h and 6min).
The months with the least sunshine are January and February (Average sunshine: 5h and 24min).
Average sunshine days in September
Mountain City, NV
- Average sunshine days in September: 20.7 days
The month with the most sunshine days is August (22.4 days).
The month with the least sunshine days is April (11.4 days).
Average UV index in September
Mountain City, NV
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is November (UV index 1).
Average cloud cover in September
Mountain City, NV
- Average cloud cover in September: 14
The month with the most cloud cover is February (Cloud cover 46).
The months with the least cloud cover are July and August (Cloud cover 11).
Average visibility in September
Mountain City, NV
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
