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
Mount Holly's September weather shows a modest shift in high-temperatures, falling from August's moderately hot 83.8°F (28.8°C) to a still warm 77.7°F (25.4°C). Mount Holly records an average low of 64.6°F (18.1°C) throughout the nights in September.Humidity
The average relative humidity in September is 76%.Rainfall
In Mount Holly, during September, the rain falls for 12.8 days and regularly aggregates up to 1.46" (37mm) of precipitation. Throughout the year, there are 146.1 rainfall days, and 17.83" (453mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 25min.On the first day of September in Mount Holly, sunrise is at 6:37 am and sunset at 7:36 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 6:50 pm EDT.
Sunshine
The average sunshine in September is 9.2h.UV index
The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index, 5 in September, converts into the following recommendations:
Prioritize safety - Recommendations to avert sunburn are shared. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Frequently asked questions
What are September temperatures in Mount Holly?
What is the average humidity in September in Mount Holly?
How much does it rain in Mount Holly in September?
When it does not snow in Mount Holly?
What is the average length of the day in September in Mount Holly?
What time are sunrise and sunset in September in Mount Holly?
How long on average sun shines in September in Mount Holly?
What is the UV index reading in September in Mount Holly?
Average temperature in September
Mount Holly, VA
- Average high temperature in September: 77.7°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (41.7°F).
- Average low temperature in September: 64.6°F
The month with the highest average low temperature is July (71.2°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).
Average pressure in September
Mount Holly, VA
- Average pressure in September: 30.04"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in September
Mount Holly, VA
- Average wind speed in September: 7.4mph
The windiest month (with the highest average wind speed) is March (9.3mph).
The calmest month (with the lowest average wind speed) is July (6.3mph).
Average humidity in September
Mount Holly, VA
- Average humidity in September: 76%
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is January (73%).
Average rainfall in September
Mount Holly, VA
- Average rainfall in September: 1.46"
The wettest month (with the highest rainfall) is August (2.52").
The driest months (with the least rainfall) are January and November (0.94").
Average rainfall days in September
Mount Holly, VA
- Average rainfall days in September: 12.8 days
The month with the highest number of rainy days is July (16.8 days).
The month with the least rainy days is November (7.9 days).
Average snowfall in September
Mount Holly, VA
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.83").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Mount Holly, VA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (2.8 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Mount Holly, VA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 12min).
Average sunshine days in September
Mount Holly, VA
- Average sunshine days in September: 14.9 days
The month with the most sunshine days is January (20.2 days).
The month with the least sunshine days is August (11.8 days).
Average UV index in September
Mount Holly, VA
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
Mount Holly, VA
- Average cloud cover in September: 34
The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in September
Mount Holly, VA
- 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).
Mount Holly, Virginia, USA
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