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 84.7°F (29.3°C) to a still warm 78.1°F (25.6°C). During September, the average low-temperature in Colesville is an enjoyable 61.7°F (16.5°C).Humidity
The average relative humidity in September is 74%.Rainfall
In Colesville, Maryland, during September, the rain falls for 13 days and regularly aggregates up to 2.32" (59mm) of precipitation. In Colesville, Maryland, during the entire year, the rain falls for 155.7 days and collects up to 31.42" (798mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
In September, the average length of the day in Colesville is 12h and 26min.On the first day of the month, sunrise is at 6:37 am and sunset at 7:38 pm. On the last day of September, sunrise is at 7:03 am and sunset at 6:51 pm EDT.
Sunshine
In September, the average sunshine is 8.9h.UV index
The average daily maximum UV index in September in Colesville 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 average person.Note: A typical high UV index of 5 in September suggests the following recommendations:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Frequently asked questions
What is the temperature in September in Colesville?
What is the average humidity in September in Colesville?
How many days does it rain in September in Colesville?
When it does not snow in Colesville?
How many hours of daylight does Colesville have in September?
What time are sunrise and sunset in September in Colesville?
How many hours of sunshine does Colesville have in September?
What is the UV index intensity in September in Colesville?
Average temperature in September
Colesville, MD
- Average high temperature in September: 78.1°F
The warmest month (with the highest average high temperature) is July (87.3°F).
The month with the lowest average high temperature is January (39°F).
- Average low temperature in September: 61.7°F
The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (26.8°F).
Average pressure in September
Colesville, MD
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Colesville, MD
- Average wind speed in September: 5.9mph
The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in September
Colesville, MD
- Average humidity in September: 74%
The months with the highest relative humidity are May, October and December (76%).
The month with the lowest relative humidity is July (70%).
Average rainfall in September
Colesville, MD
- Average rainfall in September: 2.32"
The wettest month (with the highest rainfall) is August (4.02").
The driest months (with the least rainfall) are January and February (2.01").
Average rainfall days in September
Colesville, MD
- Average rainfall days in September: 13 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is November (9 days).
Average snowfall in September
Colesville, MD
- Average snowfall in September: 0"
The month with the highest snowfall is March (2.95").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Colesville, MD
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (5.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Colesville, 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 30min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).
Average sunshine days in September
Colesville, MD
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is November (19.2 days).
The month with the least sunshine days is May (11.7 days).
Average UV index in September
Colesville, 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
Colesville, MD
- Average cloud cover in September: 37
The months with the most cloud cover are March and December (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in September
Colesville, 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).
Colesville, Maryland, USA
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