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
September
Weather in September
Temperature
During the shift to September, Westover records a mild decrease in average high-temperature, moving from a moderately hot 82.8°F (28.2°C) in August to a still warm 77°F (25°C). An average low-temperature of 65.8°F (18.8°C) marks the nights throughout September.Humidity
In Westover, the average relative humidity in September is 78%.Rainfall
In September, the rain falls for 13.8 days. Throughout September, 2.2" (56mm) of precipitation is accumulated. In Westover, during the entire year, the rain falls for 158.2 days and collects up to 29.96" (761mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
The average length of the day in September is 12h and 25min.On the first day of September, sunrise is at 6:33 am and sunset at 7:32 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 6:46 pm EDT.
Sunshine
In September, the average sunshine is 9.5h.UV index
In September, the average daily maximum UV index in Westover is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: In September, the maximum UV index of 5 translates into these guidelines:
Ensure safety - Sun damage prevention is strongly urged. To guard against the harmful effects of the Sun, minimize exposure during midday. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
How many hours of daylight does Westover have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Westover have in September?
How high is the UV index in September?
Average temperature in September
Westover, MD
- Average high temperature in September: 77°F
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (42.1°F).
- Average low temperature in September: 65.8°F
The month with the highest average low temperature is July (72.3°F).
The coldest month (with the lowest average low temperature) is January (31.5°F).
Average pressure in September
Westover, MD
- 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
Westover, MD
- Average wind speed in September: 8.2mph
The windiest months (with the highest average wind speed) are January, February and March (10.4mph).
The calmest month (with the lowest average wind speed) is August (7mph).
Average humidity in September
Westover, MD
- Average humidity in September: 78%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is January (74%).
Average rainfall in September
Westover, MD
- Average rainfall in September: 2.2"
The wettest month (with the highest rainfall) is August (3.46").
The driest month (with the least rainfall) is January (1.93").
Average rainfall days in September
Westover, MD
- Average rainfall days in September: 13.8 days
The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is January (9.7 days).
Average snowfall in September
Westover, MD
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.34").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Westover, MD
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (3.1 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
Westover, MD
- 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 3min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The months with the least sunshine are February and December (Average sunshine: 5h and 18min).
Average sunshine days in September
Westover, MD
- Average sunshine days in September: 13.8 days
The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is August (9.8 days).
Average UV index in September
Westover, MD
- 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
Westover, MD
- Average cloud cover in September: 31
The month with the most cloud cover is March (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in September
Westover, MD
- 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).