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
South River Heights experiences a moderate temperature shift at the start of September, with average high-temperatures adjusting a bit from 83.3°F (28.5°C) in August to a still moderately hot 77°F (25°C). During the month of September, an average temperature of 64.6°F (18.1°C) is noted during the nights in South River Heights, Maryland.Humidity
The average relative humidity in September in South River Heights, Maryland, is 75%.Rainfall
In South River Heights, in September, during 10.5 rainfall days, 0.63" (16mm) of precipitation is typically accumulated. Throughout the year, there are 120.4 rainfall days, and 10.47" (266mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall in South River Heights.Daylight
In September, the average length of the day is 12h and 26min.On the first day of September, sunrise is at 6:35 am and sunset at 7:36 pm. On the last day of the month, sunrise is at 7:01 am and sunset at 6:50 pm EDT.
Sunshine
In September, the average sunshine in South River Heights is 9.2h.UV index
In South River Heights, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: A typical high UV index of 5 in September suggests the following recommendations:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Frequently asked questions
What is the usual temperature for South River Heights in September?
What is the average humidity in September in South River Heights?
How much does it rain in South River Heights in September?
When it does not snow in South River Heights?
What is the average length of the day in September in South River Heights?
When are sunrise and sunset in September in South River Heights?
How many hours of sunshine does South River Heights have in September?
How high is the UV index in September in South River Heights?
Average temperature in September
South River Heights, MD
- Average high temperature in September: 77°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (40.3°F).
- Average low temperature in September: 64.6°F
The month with the highest average low temperature is July (72°F).
The coldest month (with the lowest average low temperature) is January (29.8°F).
Average pressure in September
South River Heights, MD
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
South River Heights, MD
- Average wind speed in September: 7.6mph
The windiest month (with the highest average wind speed) is January (10mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).
Average humidity in September
South River Heights, MD
- Average humidity in September: 75%
The month with the highest relative humidity is May (78%).
The months with the lowest relative humidity are January, March, April and November (72%).
Average rainfall in September
South River Heights, MD
- Average rainfall in September: 0.63"
The wettest month (with the highest rainfall) is August (1.69").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in September
South River Heights, MD
- Average rainfall days in September: 10.5 days
The months with the highest number of rainy days are July and August (14.3 days).
The month with the least rainy days is November (5.3 days).
Average snowfall in September
South River Heights, MD
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.67").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
South River Heights, MD
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.5 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
South River Heights, 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 48min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).
Average sunshine days in September
South River Heights, MD
- Average sunshine days in September: 17.4 days
The month with the most sunshine days is November (23.4 days).
The month with the least sunshine days is August (13.8 days).
Average UV index in September
South River Heights, 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 and December (UV index 2).
Average cloud cover in September
South River Heights, MD
- Average cloud cover in September: 33
The months with the most cloud cover are February and March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in September
South River Heights, 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).
South River Heights, Maryland, USA
Weather forecast for your location
2. Allow the app to use your location
