September weather forecast
Collison Corner, MD

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Weather in September

The first month of the autumn, September, is still a warm month in Collison Corner, Maryland, with an average temperature ranging between min 64.6°F (18.1°C) and max 77°F (25°C).

Temperature

September signals a slight drop in average high-temperature, sliding from August's warm 83.3°F (28.5°C) to a still moderately hot 77°F (25°C). During the September nights, an average temperature of 64.6°F (18.1°C) is observed.

Humidity

In Collison Corner, the average relative humidity in September is 75%.

Rainfall

In Collison Corner, in September, during 10.5 rainfall days, 0.63" (16mm) of precipitation is typically accumulated. In Collison Corner, during the entire year, the rain falls for 120.4 days and collects up to 10.47" (266mm) of precipitation.

Snowfall

April through October are months without snowfall.

Daylight

The average length of the day in September is 12h and 26min.
On the first day of the month, sunrise is at 6:35 am and sunset at 7:36 pm. On the last day of September, in Collison Corner, sunrise is at 7:01 am and sunset at 6:50 pm EDT.

Sunshine

In Collison Corner, the average sunshine in September is 9.2h.

UV index

In Collison Corner, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: A maximum daily UV index of 5 during September morphs into the following directions:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Updated: Jun 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average September temperature?

During September, Collison Corner experiences an average high-temperature of 77°F (25°C) and a low-temperature of 64.6°F (18.1°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which combines relative humidity and air temperature, in August is appraised at 89.6°F (32°C).

What is the average humidity in September?

In Collison Corner, the average relative humidity in September is 75%.

How many days does it rain in September?

In Collison Corner, in September, during 10.5 rainfall days, 0.63" (16mm) of precipitation is typically accumulated.

When it does not snow?

In Collison Corner, snow does not fall in April through October.

What is the average length of the day in September?

In Collison Corner, the average day length in September is 12h and 26min.

When are sunrise and sunset in September in Collison Corner?

In September, on the first day of the month, 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 6:50 pm EDT.

How long on average sun shines in September?

In September, the average sunshine duration is 9.2h.

What is the UV index reading in September?

The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium hazard to health from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Collison Corner, MD

Average temperature in September - Collison Corner, MD
  • Average high temperature in September: 77°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (40.3°F).

  • Average low temperature in September: 64.6°F

The month with the highest average low temperature is July (72°F).
The coldest month (with the lowest average low temperature) is January (29.8°F).

Average pressure in September
Collison Corner, MD

Average pressure in September - Collison Corner, 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
Collison Corner, MD

Average wind speed in September - Collison Corner, MD
  • Average wind speed in September: 7.6mph

The windiest month (with the highest average wind speed) is January (10mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).

Average humidity in September
Collison Corner, MD

Average humidity in September - Collison Corner, MD
  • Average humidity in September: 75%

The month with the highest relative humidity is May (78%).
The months with the lowest relative humidity are January, March, April and November (72%).

Average rainfall in September
Collison Corner, MD

Average rainfall in September - Collison Corner, MD
  • Average rainfall in September: 0.63"

The wettest month (with the highest rainfall) is August (1.69").
The driest month (with the least rainfall) is January (0.47").

Average rainfall days in September
Collison Corner, MD

Average rainfall days in September - Collison Corner, MD
  • Average rainfall days in September: 10.5 days

The months with the highest number of rainy days are July and August (14.3 days).
The month with the least rainy days is November (5.3 days).

Average snowfall in September
Collison Corner, MD

Average snowfall in September - Collison Corner, MD
  • Average snowfall in September: 0"

The month with the highest snowfall is January (0.67").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September
Collison Corner, MD

Average snowfall days in September - Collison Corner, MD
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (2.5 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
Collison Corner, MD

Average daylight in September / Average sunshine in September - Collison Corner, 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: 9h and 1min

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
Collison Corner, MD

Average sunshine days in September - Collison Corner, MD
  • Average sunshine days in September: 17.4 days

The month with the most sunshine days is November (23.4 days).
The month with the least sunshine days is August (13.8 days).

Average UV index in September
Collison Corner, MD

Average UV index in September - Collison Corner, 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
Collison Corner, MD

Average cloud cover in September - Collison Corner, MD
  • Average cloud cover in September: 33

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 28).

Average visibility in September
Collison Corner, MD

Average visibility in September - Collison Corner, 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).

Collison Corner, Maryland, USA

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