September weather forecastAberdeen, MD
September
Weather in September
September signals the advent of fall in Aberdeen, as temperatures begin to taper off. The transition from the sweltering summer heat, with a high of 76.5°F (24.7°C), gives way to a more agreeable climate. The city gradually cools down, recreating the fall magic seen in colorful foliage. The transition from the heat of August to the cooler September days brings a fresh breath of air. A comfortable temperature and the promise of splendid fall colors make September a spectacular month.Temperature
Aberdeen's transition into September involves a gentle shift in temperature, receding from 82.8°F (28.2°C) in August to a still warm 76.5°F (24.7°C). During September, the temperature is averaged to a low of 60.3°F (15.7°C) at night.Humidity
In Aberdeen, the average relative humidity in September is 78%.Rainfall
In Aberdeen, in September, it is raining for 12.8 days, with typically 2.13" (54mm) of accumulated precipitation. Throughout the year, there are 153 rainfall days, and 30.39" (772mm) of precipitation is accumulated.Snowfall
In Aberdeen, snow does not fall in April, June through October.Daylight
The average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 6:33 am and sunset at 7:35 pm. On the last day of September, in Aberdeen, sunrise is at 7:00 am and sunset at 6:48 pm EDT.
Sunshine
In September, the average sunshine is 9h.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 unsafe exposure to UV radiation for average individuals.Note: During September, 5 as the daily maximum UV index converts into the following advice:
Undertake protective steps - Preventing sun damage is advised. To guard against the harmful effects of the Sun, minimize exposure during midday. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Aberdeen, MD
- Average high temperature in September: 76.5°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 (38.3°F).
- Average low temperature in September: 60.3°F
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (26.6°F).
Average pressure in September
Aberdeen, 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
Aberdeen, MD
- Average wind speed in September: 6.2mph
The windiest months (with the highest average wind speed) are February and March (9mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).
Average humidity in September
Aberdeen, MD
- Average humidity in September: 78%
The month with the highest relative humidity is May (79%).
The months with the lowest relative humidity are March, April and November (74%).
Average rainfall in September
Aberdeen, MD
- Average rainfall in September: 2.13"
The wettest month (with the highest rainfall) is August (4.09").
The driest month (with the least rainfall) is January (1.85").
Average rainfall days in September
Aberdeen, MD
- Average rainfall days in September: 12.8 days
The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is January (7.5 days).
Average snowfall in September
Aberdeen, MD
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.17").
The months with the least snowfall are April, June, July, August, September and October (0").
Average snowfall days in September
Aberdeen, MD
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4.2 days).
The months with the least snowfall days are April, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Aberdeen, 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: 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: 4h and 54min).
Average sunshine days in September
Aberdeen, MD
- Average sunshine days in September: 14.8 days
The month with the most sunshine days is November (20 days).
The month with the least sunshine days is May (10.9 days).
Average UV index in September
Aberdeen, 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, November and December (UV index 2).
Average cloud cover in September
Aberdeen, MD
- Average cloud cover in September: 36
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in September
Aberdeen, MD
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
