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
The average high-temperature shows a slight dip in September, from August's warm 85.3°F (29.6°C) to a still moderately hot 78.1°F (25.6°C). Twin Brook Forest's temperature tends to fall to an average low of 61°F (16.1°C) during the nights of September.Humidity
In September, the average relative humidity is 74%.Rainfall
In September, the rain falls for 14.1 days. Throughout September, 2.4" (61mm) of precipitation is accumulated. Throughout the year, there are 156.8 rainfall days, and 30.98" (787mm) of precipitation is accumulated.Snowfall
In Twin Brook Forest, snow does not fall in May through October.Daylight
In Twin Brook Forest, Maryland, the average length of the day in September is 12h and 26min.On the first day of September in Twin Brook Forest, 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 September, the average sunshine is 8.8h.UV index
The average daily maximum UV index in September in Twin Brook Forest is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 5 in September translates into these instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Frequently asked questions
What is the temperature in September in Twin Brook Forest?
What is the average humidity in September in Twin Brook Forest?
How many days does it rain in September in Twin Brook Forest?
When it does not snow in Twin Brook Forest?
How many hours of daylight does Twin Brook Forest have in September?
What time are sunrise and sunset in September in Twin Brook Forest?
How many hours of sunshine does Twin Brook Forest have in September?
What is the UV index reading in September in Twin Brook Forest?
Average temperature in September
Twin Brook Forest, MD
- Average high temperature in September: 78.1°F
The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is January (39°F).
- Average low temperature in September: 61°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).
Average pressure in September
Twin Brook Forest, MD
- Average pressure in September: 30.06"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
Twin Brook Forest, MD
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is March (8mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in September
Twin Brook Forest, MD
- Average humidity in September: 74%
The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is July (70%).
Average rainfall in September
Twin Brook Forest, MD
- Average rainfall in September: 2.4"
The wettest month (with the highest rainfall) is August (3.9").
The driest month (with the least rainfall) is January (1.97").
Average rainfall days in September
Twin Brook Forest, MD
- Average rainfall days in September: 14.1 days
The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is November (9.2 days).
Average snowfall in September
Twin Brook Forest, MD
- Average snowfall in September: 0"
The month with the highest snowfall is March (3.03").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Twin Brook Forest, MD
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (5.3 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
Twin Brook Forest, 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 December (Average sunshine: 5h and 0min).
Average sunshine days in September
Twin Brook Forest, MD
- Average sunshine days in September: 14.7 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is July (12 days).
Average UV index in September
Twin Brook Forest, 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, February, November and December (UV index 2).
Average cloud cover in September
Twin Brook Forest, MD
- Average cloud cover in September: 37
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in September
Twin Brook Forest, 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).
Twin Brook Forest, Maryland, USA
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