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 onset of September brings a small shift in high-temperatures, falling from a moderately hot 83.1°F (28.4°C) in August to a still warm 77.5°F (25.3°C). September nights experience a consistent temperature drop to a comfortable 64°F (17.8°C).Humidity
In September, the average relative humidity in Madison is 78%.Rainfall
The month with the least rainfall is September, when the rain falls for 9.5 days and typically collects 0.47" (12mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
The average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 6:34 am and sunset at 7:34 pm. On the last day of September, in Madison, sunrise is at 7:00 am and sunset at 6:48 pm EDT.
Sunshine
The average sunshine in September is 9.2h.UV index
The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: The UV index of 5 during September translates into the following guidance:
Heed the precautions - Suggestions to avoid sunburn are made. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Madison?
What is the average humidity in September?
What is the driest month?
How many days does it rain in September?
When it does not snow?
How many hours of daylight does Madison have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Madison have in September?
What is the UV index reading in September in Madison?
Average temperature in September
Madison, MD
- Average high temperature in September: 77.5°F
The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (41.2°F).
- Average low temperature in September: 64°F
The month with the highest average low temperature is July (71.6°F).
The coldest month (with the lowest average low temperature) is January (30.2°F).
Average pressure in September
Madison, MD
- Average pressure in September: 30.04"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
Madison, MD
- Average wind speed in September: 7.3mph
The windiest month (with the highest average wind speed) is February (10mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in September
Madison, MD
- Average humidity in September: 78%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is January (73%).
Average rainfall in September
Madison, MD
- Average rainfall in September: 0.47"
The wettest month (with the highest rainfall) is August (1.46").
The driest month (with the least rainfall) is September (0.47").
Average rainfall days in September
Madison, MD
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is August (11.6 days).
The months with the least rainy days are January and November (6.3 days).
Average snowfall in September
Madison, MD
- Average snowfall in September: 0"
The month with the highest snowfall is December (0.51").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Madison, MD
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (2.1 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
Madison, MD
- Average daylight in September: 12h and 2min
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 1min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The months with the least sunshine are February and December (Average sunshine: 5h and 12min).
Average sunshine days in September
Madison, MD
- Average sunshine days in September: 18.9 days
The month with the most sunshine days is November (22.2 days).
The month with the least sunshine days is August (16.8 days).
Average UV index in September
Madison, 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
Madison, MD
- Average cloud cover in September: 34
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in September
Madison, 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).
Madison, Maryland, USA
Weather forecast for your location
2. Allow the app to use your location