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 Glenn Dale, the beginning of September is marked by a marginally lowered average high-temperature, shifting from August's moderately hot 84.4°F (29.1°C) to a still warm 77.9°F (25.5°C). During September, Glenn Dale records a consistent average nighttime temperature of 62.8°F (17.1°C).Humidity
In Glenn Dale, the average relative humidity in September is 74%.Rainfall
In Glenn Dale, during September, the rain falls for 12.6 days and regularly aggregates up to 2.13" (54mm) of precipitation. In Glenn Dale, during the entire year, the rain falls for 156.7 days and collects up to 31.81" (808mm) of precipitation.Snowfall
In Glenn Dale, snow does not fall in May through October.Daylight
In Glenn Dale, the average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 6:36 am and sunset at 7:37 pm. On the last day of September, sunrise is at 7:02 am and sunset at 6:51 pm EDT.
Sunshine
The average sunshine in September in Glenn Dale is 9.1h.UV index
In September, the average daily maximum UV index in Glenn Dale is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: In September, a daily maximum UV index of 5 leads to the following instructions:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Frequently asked questions
What is the usual temperature for Glenn Dale in September?
What is the average humidity in September in Glenn Dale?
How many days does it rain in September in Glenn Dale?
When it does not snow in Glenn Dale?
What is the average length of the day in September in Glenn Dale?
What time are sunrise and sunset in September in Glenn Dale?
How many hours of sunshine does Glenn Dale have in September?
What is the UV index reading in September in Glenn Dale?
Average temperature in September
Glenn Dale, MD
- Average high temperature in September: 77.9°F
The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (39.7°F).
- Average low temperature in September: 62.8°F
The month with the highest average low temperature is July (69.8°F).
The coldest month (with the lowest average low temperature) is January (28°F).
Average pressure in September
Glenn Dale, 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 (29.94"Hg).
Average wind speed in September
Glenn Dale, MD
- Average wind speed in September: 6.4mph
The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.6mph).
Average humidity in September
Glenn Dale, MD
- Average humidity in September: 74%
The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is April (71%).
Average rainfall in September
Glenn Dale, MD
- Average rainfall in September: 2.13"
The wettest month (with the highest rainfall) is August (3.62").
The driest month (with the least rainfall) is January (2.05").
Average rainfall days in September
Glenn Dale, MD
- Average rainfall days in September: 12.6 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (8.9 days).
Average snowfall in September
Glenn Dale, MD
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.36").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Glenn Dale, MD
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4.3 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
Glenn Dale, 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: 9h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).
Average sunshine days in September
Glenn Dale, MD
- Average sunshine days in September: 16 days
The month with the most sunshine days is November (19 days).
The month with the least sunshine days is May (11.5 days).
Average UV index in September
Glenn Dale, 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
Glenn Dale, MD
- Average cloud cover in September: 35
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility in September
Glenn Dale, 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).
Glenn Dale, Maryland, USA
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