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
September signals a slight drop in average high-temperature, sliding from August's moderately hot 81.3°F (27.4°C) to a still warm 74.7°F (23.7°C). In September, the temperature sees a substantial plunge from daytime highs to a low average of 52.7°F (11.5°C).Humidity
The average relative humidity in September is 80%.Rainfall
September is the month with the least rainfall in Glen Lyn. Rain falls for 13.6 days and accumulates 1.34" (34mm) of precipitation.Snowfall
In Glen Lyn, Virginia, snow does not fall in June through September.Daylight
In Glen Lyn, the average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 6:54 am and sunset at 7:51 pm. On the last day of September, in Glen Lyn, sunrise is at 7:18 am and sunset at 7:07 pm EDT.
Sunshine
In Glen Lyn, the average sunshine in September is 8.2h.UV index
In Glen Lyn, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, a daily maximum UV index of 4 leads to the following instructions:
Exercise care. People with light skin might get burns in fewer than 30 minutes. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Enhance your sun protection with tightly woven, yet airy clothing.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Glen Lyn in September?
What is the average humidity in September in Glen Lyn?
What is the driest month in Glen Lyn?
How much does it rain in Glen Lyn in September?
When it does not snow in Glen Lyn?
Does it snow in Glen Lyn in September?
What is the average length of the day in September in Glen Lyn?
When is the sunrise / sunset in September in Glen Lyn?
How many hours of sunshine does Glen Lyn have in September?
How high is the UV index in September in Glen Lyn?
Average temperature in September
Glen Lyn, VA
- Average high temperature in September: 74.7°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (38.1°F).
- Average low temperature in September: 52.7°F
The month with the highest average low temperature is July (59.4°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in September
Glen Lyn, VA
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).
Average wind speed in September
Glen Lyn, VA
- Average wind speed in September: 4.4mph
The windiest months (with the highest average wind speed) are January and February (7.5mph).
The calmest month (with the lowest average wind speed) is August (4mph).
Average humidity in September
Glen Lyn, VA
- Average humidity in September: 80%
The months with the highest relative humidity are February and December (81%).
The months with the lowest relative humidity are June, July and November (77%).
Average rainfall in September
Glen Lyn, VA
- Average rainfall in September: 1.34"
The wettest month (with the highest rainfall) is May (2.8").
The driest month (with the least rainfall) is September (1.34").
Average rainfall days in September
Glen Lyn, VA
- Average rainfall days in September: 13.6 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is October (8.8 days).
Average snowfall in September
Glen Lyn, VA
- Average snowfall in September: 0"
The month with the highest snowfall is January (3.43").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Glen Lyn, VA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (7.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Glen Lyn, VA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 8h and 1min
The months with the most sunshine are June and July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in September
Glen Lyn, VA
- Average sunshine days in September: 13.9 days
The month with the most sunshine days is October (20.1 days).
The month with the least sunshine days is May (10.7 days).
Average UV index in September
Glen Lyn, VA
- Average UV index in September: 4
The months with the highest UV index are June 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
Glen Lyn, VA
- Average cloud cover in September: 44
The months with the most cloud cover are January and February (Cloud cover 56).
The months with the least cloud cover are June and July (Cloud cover 38).
Average visibility in September
Glen Lyn, VA
- Average visibility in September: 4mi
The months with the highest visibility are January, February, March, April, May, June, July, August, October, November and December (5mi).
The month with the lowest visibility is September (4mi).
Glen Lyn, Virginia, USA
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