September weather forecastDundalk, MD
September
Weather in September
September ushers in the onset of Autumn, with temperatures subtly dipping to a comfortable 76.8°F (24.9°C). A noticeable drop in rainfall to 0.24in makes this the driest month of the year in Dundalk. Golden hues begin to dominate the city landscape as leaves start their transformation. In this month, weather changes become more noticeable, with sunny days slowly giving way to cooler, shorter days. Despite the impending chill, residents enjoy a blend of summer’s residual warmth and autumn’s refreshing coolness.Temperature
September's onset brings a negligible change in high-temperatures, falling from a warm 82.9°F (28.3°C) in August to a still moderately hot 76.8°F (24.9°C). During the nights in September, Dundalk observes an average low-temperature of 62.4°F (16.9°C).Humidity
In Dundalk, the average relative humidity in September is 75%.Rainfall
The month with the least rainfall in Dundalk, Maryland, is September, when the rain falls for 6 days and typically collects 0.24" (6mm) of precipitation.Snowfall
April through October are months without snowfall in Dundalk.Ocean temperature
In Dundalk, Maryland, the average seawater temperature in September is 73.6°F (23.1°C).Note: Your comfort in 73.6°F (23.1°C) waters hinges on your relationship with the cold, today's sunny disposition, wind patterns, and the air's temperature. For context, Olympic swimmers are no strangers to waters of 77°F (25°C) to 82.4°F (28°C).
Daylight
In September, the average length of the day in Dundalk 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 6:49 pm EDT.
Sunshine
In September, the average sunshine is 9.2h.UV index
In Dundalk, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the average person.Note: In September, a daily UV index of 5 turns into the following recommendations:
Take necessary precautions - Suggestions to elude sunburn are provided. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Boost your sun resistance with garments that are densely woven yet spacious. Notice! The reflection of water and sand increases the UV radiation significantly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Dundalk, MD
- Average high temperature in September: 76.8°F
The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (38.8°F).
- Average low temperature in September: 62.4°F
The month with the highest average low temperature is July (70.3°F).
The coldest month (with the lowest average low temperature) is January (27.7°F).
Average pressure in September
Dundalk, 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
Dundalk, MD
- Average wind speed in September: 6.8mph
The windiest month (with the highest average wind speed) is March (9.4mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity in September
Dundalk, MD
- Average humidity in September: 75%
The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is April (72%).
Average rainfall in September
Dundalk, MD
- Average rainfall in September: 0.24"
The wettest month (with the highest rainfall) is August (1.06").
The driest month (with the least rainfall) is September (0.24").
Average rainfall days in September
Dundalk, MD
- Average rainfall days in September: 6 days
The month with the highest number of rainy days is July (10.3 days).
The month with the least rainy days is November (4.1 days).
Average snowfall in September
Dundalk, MD
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.31").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Dundalk, MD
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in September
Dundalk, MD
- Average sea temperature in September: 73.5°F
The best month for swimming (with the highest average sea temperature) is August (77.5°F).
The coldest month (with the lowest average sea temperature) is February (44.5°F).
Average daylight in September /
Average sunshine in September
Dundalk, 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 30min).
- Average sunshine in September: 9h and 12min
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
Dundalk, MD
- Average sunshine days in September: 21.5 days
The month with the most sunshine days is January (24.7 days).
The month with the least sunshine days is July (16.9 days).
Average UV index in September
Dundalk, 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
Dundalk, MD
- Average cloud cover in September: 34
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 29).
Average visibility in September
Dundalk, 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).
