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
In Green Wood Knolls, entering September brings a subtle temperature decrement, reducing from August's warm 84.9°F (29.4°C) to a still moderately hot 78.1°F (25.6°C). Throughout September nights, Green Wood Knolls experiences a consistent temperature average of 60.8°F (16°C).Humidity
In Green Wood Knolls, Maryland, the average relative humidity in September is 74%.Rainfall
In Green Wood Knolls, in September, it is raining for 12.5 days, with typically 2.24" (57mm) of accumulated precipitation. Throughout the year, there are 160.9 rainfall days, and 32.99" (838mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
In Green Wood Knolls, the average length of the day in September is 12h and 26min.On the first day of September, sunrise is at 6:37 am and sunset at 7:38 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:52 pm EDT.
Sunshine
In Green Wood Knolls, Maryland, the average sunshine in September is 8.9h.UV index
The average daily maximum UV index in September in Green Wood Knolls is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the average person.Note: A maximum high daily UV index of 5 during September translates into the following directions:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Frequently asked questions
What is the usual temperature for Green Wood Knolls in September?
What is the average humidity in September in Green Wood Knolls?
How much does it rain in Green Wood Knolls in September?
When it does not snow in Green Wood Knolls?
How many hours of daylight does Green Wood Knolls have in September?
What time are sunrise and sunset in September in Green Wood Knolls?
How many hours of sunshine does Green Wood Knolls have in September?
What is the UV index reading in September in Green Wood Knolls?
Average temperature in September
Green Wood Knolls, MD
- Average high temperature in September: 78.1°F
The warmest month (with the highest average high temperature) is July (87.3°F).
The month with the lowest average high temperature is January (39°F).
- Average low temperature in September: 60.8°F
The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).
Average pressure in September
Green Wood Knolls, MD
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in September
Green Wood Knolls, MD
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in September
Green Wood Knolls, MD
- Average humidity in September: 74%
The months with the highest relative humidity are May, October and December (76%).
The month with the lowest relative humidity is July (70%).
Average rainfall in September
Green Wood Knolls, MD
- Average rainfall in September: 2.24"
The wettest month (with the highest rainfall) is August (4.13").
The driest month (with the least rainfall) is January (2.17").
Average rainfall days in September
Green Wood Knolls, MD
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is November (8.8 days).
Average snowfall in September
Green Wood Knolls, MD
- Average snowfall in September: 0"
The months with the highest snowfall are January and March (3.03").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Green Wood Knolls, MD
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (5.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Green Wood Knolls, MD
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 8h and 5min
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 0min).
Average sunshine days in September
Green Wood Knolls, MD
- Average sunshine days in September: 15.6 days
The month with the most sunshine days is November (19.4 days).
The months with the least sunshine days are May and July (11 days).
Average UV index in September
Green Wood Knolls, 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, November and December (UV index 2).
Average cloud cover in September
Green Wood Knolls, MD
- Average cloud cover in September: 37
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in September
Green Wood Knolls, MD
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
Green Wood Knolls, Maryland, USA
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