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 arrival of September corresponds with a minor reduction in the average high-temperature, down from August's moderately hot 82.8°F (28.2°C) to a still warm 76.5°F (24.7°C). Perryman reports an average nighttime low-temperature of 60.3°F (15.7°C) in September.Humidity
In Perryman, the average relative humidity in September is 78%.Rainfall
In Perryman, 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
April, June through October are months without snowfall in Perryman.Daylight
In September, the average length of the day is 12h and 26min.On the first day of September, sunrise is at 6:33 am and sunset at 7:35 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 6:48 pm EDT.
Sunshine
In September, the average sunshine is 9h.UV index
In Perryman, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: In September, the maximum UV index of 5 suggests these recommendations:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Frequently asked questions
What are the temperatures in Perryman in September?
What is the average humidity in September in Perryman?
How much does it rain in Perryman in September?
When it does not snow in Perryman?
What is the average length of the day in September in Perryman?
What time are sunrise and sunset in September in Perryman?
How long on average sun shines in September in Perryman?
How high is the UV index in September in Perryman?
Average temperature in September
Perryman, 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
Perryman, 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
Perryman, 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
Perryman, 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
Perryman, 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
Perryman, 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
Perryman, 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
Perryman, 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
Perryman, MD
- Average daylight in September: 12h and 2min
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
Perryman, 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
Perryman, 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
Perryman, 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
Perryman, 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).
Perryman, Maryland, USA
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