September weather forecast
College Heights, MD

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Weather in September

September, the first month of the autumn in College Heights, is still a warm month, with an average temperature ranging between min 62.2°F (16.8°C) and max 78.1°F (25.6°C).

Temperature

A subtle shift in College Heights's weather is observed as August turns into September, with the average high temperature reducing from 85.1°F (29.5°C) to a still moderately hot 78.1°F (25.6°C). College Heights experiences a consistent average temperature of 62.2°F (16.8°C) throughout the nights in September.

Humidity

The average relative humidity in September is 74%.

Rainfall

In College Heights, Maryland, in September, during 12.3 rainfall days, 2.09" (53mm) of precipitation is typically accumulated. In College Heights, during the entire year, the rain falls for 157.9 days and collects up to 31.14" (791mm) of precipitation.

Snowfall

In College Heights, snow does not fall in May through November.

Daylight

The average length of the day in September is 12h and 26min.
On the first day of September in College Heights, sunrise is at 6:37 am and sunset at 7:37 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 6:51 pm EDT.

Sunshine

The average sunshine in September is 9.1h.

UV index

In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the average person.
Note: In September, the maximum UV index of 5 suggests this advice:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.

Frequently asked questions

What is the average September temperature?

September temperatures vary between a high-temperature of 78.1°F (25.6°C) and a low-temperature of 62.2°F (16.8°C). The average heat index (a.k.a. 'real feel', 'feels like'), which combines air temperature and relative humidity, in August is evaluated at 93.2°F (34°C).

What is the average humidity in September?

In College Heights, the average relative humidity in September is 74%.

How many days does it rain in September?

In College Heights, in September, it is raining for 12.3 days, with typically 2.09" (53mm) of accumulated precipitation.

When it does not snow?

In College Heights, snow does not fall in May through November.

What is the average length of the day in September?

In College Heights, the average day length in September is 12h and 26min.

When are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:37 am and sunset at 7:37 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 6:51 pm EDT.

How long on average sun shines in September?

In September, the average sunshine duration is 9.1h.

What is the UV index reading in September in College Heights?

In College Heights, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes 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
College Heights, MD

Average temperature in September - College Heights, MD
  • Average high temperature in September: 78.1°F

The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (39.9°F).

  • Average low temperature in September: 62.2°F

The month with the highest average low temperature is July (70°F).
The coldest month (with the lowest average low temperature) is January (27.7°F).

Average pressure in September
College Heights, MD

Average pressure in September - College Heights, 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
College Heights, MD

Average wind speed in September - College Heights, MD
  • Average wind speed in September: 6.1mph

The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

Average humidity in September
College Heights, MD

Average humidity in September - College Heights, MD
  • Average humidity in September: 74%

The months with the highest relative humidity are May, October and December (76%).
The months with the lowest relative humidity are April and July (71%).

Average rainfall in September
College Heights, MD

Average rainfall in September - College Heights, MD
  • Average rainfall in September: 2.09"

The wettest month (with the highest rainfall) is August (3.58").
The driest month (with the least rainfall) is January (2.01").

Average rainfall days in September
College Heights, MD

Average rainfall days in September - College Heights, MD
  • Average rainfall days in September: 12.3 days

The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is November (9 days).

Average snowfall in September
College Heights, MD

Average snowfall in September - College Heights, MD
  • Average snowfall in September: 0"

The month with the highest snowfall is January (2.6").
The months with the least snowfall are May, June, July, August, September, October and November (0").

Average snowfall days in September
College Heights, MD

Average snowfall days in September - College Heights, MD
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (4.1 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
College Heights, MD

Average daylight in September / Average sunshine in September - College Heights, 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 54min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).

Average sunshine days in September
College Heights, MD

Average sunshine days in September - College Heights, MD
  • Average sunshine days in September: 15.6 days

The month with the most sunshine days is November (19.1 days).
The month with the least sunshine days is May (11.8 days).

Average UV index in September
College Heights, MD

Average UV index in September - College Heights, 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 and December (UV index 2).

Average cloud cover in September
College Heights, MD

Average cloud cover in September - College Heights, 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 29).

Average visibility in September
College Heights, MD

Average visibility in September - College Heights, 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).

College Heights, Maryland, USA

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