September weather forecastMountain Lake Park, MD
September
Weather in September
The first month of the autumn, September, is also an agreeable month in Mountain Lake Park, Maryland, with an average temperature fluctuating between 52.2°F (11.2°C) and 72.3°F (22.4°C).Temperature
Mountain Lake Park, Maryland, experiences a moderate temperature shift at the start of September, with average high-temperatures adjusting a bit from a warm 77.7°F (25.4°C) in August to an agreeable 72.3°F (22.4°C). In Mountain Lake Park, an average nighttime temperature of 52.2°F (11.2°C) is expected during September.Humidity
The average relative humidity in September is 81%.Rainfall
In Mountain Lake Park, Maryland, in September, during 16.8 rainfall days, 2.28" (58mm) of precipitation is typically accumulated. In Mountain Lake Park, during the entire year, the rain falls for 185.9 days and collects up to 35.16" (893mm) of precipitation.Snowfall
In Mountain Lake Park, snow does not fall in June through September.Daylight
In Mountain Lake Park, the average length of the day in September is 12h and 26min.On the first day of September, sunrise is at 6:46 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 7:01 pm EDT.
Sunshine
The average sunshine in September is 8.3h.UV index
In Mountain Lake Park, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the average person.Note: During September, 4 as the daily maximum UV index converts into the following advice:
Make use of precautions - Shielding skin and eyes from injury is a requirement. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Mountain Lake Park, MD
- Average high temperature in September: 72.3°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in September: 52.2°F
The month with the highest average low temperature is July (58.5°F).
The coldest month (with the lowest average low temperature) is January (19.6°F).
Average pressure in September
Mountain Lake Park, 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 (29.96"Hg).
Average wind speed in September
Mountain Lake Park, MD
- Average wind speed in September: 5.2mph
The windiest months (with the highest average wind speed) are January and February (8.9mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in September
Mountain Lake Park, MD
- Average humidity in September: 81%
The month with the highest relative humidity is February (86%).
The month with the lowest relative humidity is July (78%).
Average rainfall in September
Mountain Lake Park, MD
- Average rainfall in September: 2.28"
The wettest month (with the highest rainfall) is May (3.9").
The driest month (with the least rainfall) is November (2.24").
Average rainfall days in September
Mountain Lake Park, MD
- Average rainfall days in September: 16.8 days
The month with the highest number of rainy days is May (22.3 days).
The month with the least rainy days is February (9.3 days).
Average snowfall in September
Mountain Lake Park, MD
- Average snowfall in September: 0"
The month with the highest snowfall is February (7.6").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Mountain Lake Park, MD
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (15.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Mountain Lake Park, MD
- Average daylight in September: 12h and 24min
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 24min).
- Average sunshine in September: 8h and 18min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in September
Mountain Lake Park, MD
- Average sunshine days in September: 10.5 days
The month with the most sunshine days is November (14.5 days).
The month with the least sunshine days is May (6.9 days).
Average UV index in September
Mountain Lake Park, MD
- Average UV index in September: 4
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Mountain Lake Park, MD
- Average cloud cover in September: 44
The month with the most cloud cover is January (Cloud cover 66).
The months with the least cloud cover are July and August (Cloud cover 40).
Average visibility in September
Mountain Lake Park, MD
- Average visibility in September: 4mi
The months with the highest visibility are March, April, May, June, July, August, October, November and December (5mi).
The months with the lowest visibility are January, February and September (4mi).
