September weather forecastPerryville, MD
September
Weather in September
September, the first month of the autumn in Perryville, is still a warm month, with an average temperature varying between 76.5°F (24.7°C) and 59.7°F (15.4°C).Temperature
September brings a minor shift in the average high-temperature, adjusting from 82.8°F (28.2°C) in August to a still moderately hot 76.5°F (24.7°C). Perryville observes an average low-temperature of 59.7°F (15.4°C) during September nights.Humidity
The average relative humidity in September is 78%.Rainfall
The month with the least rainfall is September, when the rain falls for 11.8 days and typically collects 1.97" (50mm) of precipitation.Snowfall
June through October are months without snowfall.Daylight
In Perryville, 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 7:34 pm. On the last day of September, sunrise is at 7:00 am and sunset at 6:47 pm EDT.
Sunshine
The average sunshine in September in Perryville is 9.1h.UV index
In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The daily high UV index of 5 in September translates into this advice:
Exercise prevention - Precautions against solar damage are endorsed. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Perryville, 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 (37.8°F).
- Average low temperature in September: 59.7°F
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).
Average pressure in September
Perryville, 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
Perryville, MD
- Average wind speed in September: 6mph
The windiest months (with the highest average wind speed) are February and March (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in September
Perryville, MD
- Average humidity in September: 78%
The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is April (74%).
Average rainfall in September
Perryville, MD
- Average rainfall in September: 1.97"
The wettest month (with the highest rainfall) is August (3.43").
The driest month (with the least rainfall) is September (1.97").
Average rainfall days in September
Perryville, MD
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is November (8.7 days).
Average snowfall in September
Perryville, MD
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.4").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Perryville, MD
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (5.3 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Perryville, 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 6min
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
Perryville, MD
- Average sunshine days in September: 16.8 days
The month with the most sunshine days is November (19.8 days).
The month with the least sunshine days is May (11.3 days).
Average UV index in September
Perryville, 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
Perryville, MD
- Average cloud cover in September: 36
The months with the most cloud cover are February, March and May (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in September
Perryville, MD
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
