September weather forecastSaint Leonard, MD
September
Weather in September
The first month of the autumn, September, is still a warm month in Saint Leonard, Maryland, with an average temperature varying between 64.4°F (18°C) and 77.5°F (25.3°C).Temperature
The advent of September brings a slight shift in average high-temperature, moving from a moderately hot 83.7°F (28.7°C) in August to a still warm 77.5°F (25.3°C). During September, Saint Leonard sees a mean low-temperature of 64.4°F (18°C).Humidity
In September, the average relative humidity is 77%.Rainfall
In Saint Leonard, during September, the rain falls for 13.9 days and regularly aggregates up to 2.68" (68mm) of precipitation. In Saint Leonard, during the entire year, the rain falls for 158.1 days and collects up to 33.07" (840mm) of precipitation.Snowfall
In Saint Leonard, snow does not fall in April through October.Daylight
In Saint Leonard, the average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 6:36 am and sunset at 7:35 pm. On the last day of September, sunrise is at 7:01 am and sunset at 6:49 pm EDT.
Sunshine
In September, the average sunshine is 9h.UV index
In Saint Leonard, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The maximum UV index, 5 during September, leads to the following recommendations:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Saint Leonard, MD
- Average high temperature in September: 77.5°F
The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is January (41.5°F).
- Average low temperature in September: 64.4°F
The month with the highest average low temperature is July (70.7°F).
The coldest month (with the lowest average low temperature) is January (30°F).
Average pressure in September
Saint Leonard, 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 (29.95"Hg).
Average wind speed in September
Saint Leonard, MD
- Average wind speed in September: 7.1mph
The windiest month (with the highest average wind speed) is March (9.2mph).
The calmest month (with the lowest average wind speed) is July (6.1mph).
Average humidity in September
Saint Leonard, MD
- Average humidity in September: 77%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is January (72%).
Average rainfall in September
Saint Leonard, MD
- Average rainfall in September: 2.68"
The wettest month (with the highest rainfall) is July (4.41").
The driest month (with the least rainfall) is January (1.81").
Average rainfall days in September
Saint Leonard, MD
- Average rainfall days in September: 13.9 days
The month with the highest number of rainy days is August (17.7 days).
The month with the least rainy days is November (8 days).
Average snowfall in September
Saint Leonard, MD
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.85").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Saint Leonard, MD
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (3.7 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Saint Leonard, MD
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 9h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).
Average sunshine days in September
Saint Leonard, MD
- Average sunshine days in September: 14.4 days
The month with the most sunshine days is November (20.4 days).
The month with the least sunshine days is August (11.3 days).
Average UV index in September
Saint Leonard, 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
Saint Leonard, 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
Saint Leonard, 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).
