September weather forecast
College Hills, MD

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Weather in September

September, the first month of the autumn in College Hills, is also a moderately hot month, with an average temperature fluctuating between 63.3°F (17.4°C) and 77.4°F (25.2°C).

Temperature

The commencement of September indicates a gentle shift in the average high-temperature, receding from August's moderately hot 83.7°F (28.7°C) to a still warm 77.4°F (25.2°C). Throughout the month of September, the average temperature dips to a refreshing 63.3°F (17.4°C) at night.

Humidity

In September, the average relative humidity is 75%.

Rainfall

September is the month with the least rainfall in College Hills. Rain falls for 11.8 days and accumulates 1.89" (48mm) of precipitation.

Snowfall

In College Hills, Maryland, snow does not fall in May through October.

Daylight

The average length of the day in September in College Hills is 12h and 26min.
On the first day of September, sunrise is at 6:36 am and sunset at 7:37 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 6:50 pm EDT.

Sunshine

In September, the average sunshine in College Hills is 9.2h.

UV index

In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for average individuals.
Note: A daily high UV index of 5 in September leads to these guidelines:
Guard yourself - An obligation to protect skin and eyes from harm exists. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
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Frequently asked questions

What is the temperature in September in College Hills?

The high-temperature, in September, in College Hills, is 77.4°F (25.2°C), while the low-temperature averages to 63.3°F (17.4°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which represents the influence of relative humidity on air temperature, in August is computed to be 91.4°F (33°C).

What is the average humidity in September in College Hills?

In September, the average relative humidity in College Hills is 75%.

What is the driest month in College Hills?

September is the month with the least rainfall in College Hills, Maryland. Rain falls for 11.8 days and accumulates 1.89" (48mm) of precipitation.

How much does it rain in College Hills in September?

In September, the rain falls for 11.8 days. Throughout September, 1.89" (48mm) of precipitation is accumulated.

When it does not snow in College Hills?

In College Hills, Maryland, snow does not fall in May through October.

What is the average length of the day in September in College Hills?

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

When is the sunrise / sunset in September in College Hills?

In September, on the first day of the month, sunrise is at 6:36 am and sunset at 7:37 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 6:50 pm EDT.

How many hours of sunshine does College Hills have in September?

In September, the average sunshine duration in College Hills is 9.2h.

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

In September, the average daily maximum UV index in College Hills, Maryland, is 5. A UV Index estimate of 3 to 5 represents a moderate health threat 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 Hills, MD

Average temperature in September - College Hills, MD
  • Average high temperature in September: 77.4°F

The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (39.6°F).

  • Average low temperature in September: 63.3°F

The month with the highest average low temperature is July (70.7°F).
The coldest month (with the lowest average low temperature) is January (28.4°F).

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Average pressure in September
College Hills, MD

Average pressure in September - College Hills, 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).

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Average wind speed in September
College Hills, MD

Average wind speed in September - College Hills, MD
  • Average wind speed in September: 7mph

The windiest month (with the highest average wind speed) is March (9.4mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).

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Average humidity in September
College Hills, MD

Average humidity in September - College Hills, 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%).

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Average rainfall in September
College Hills, MD

Average rainfall in September - College Hills, MD
  • Average rainfall in September: 1.89"

The wettest month (with the highest rainfall) is August (3.54").
The driest month (with the least rainfall) is September (1.89").

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Average rainfall days in September
College Hills, MD

Average rainfall days in September - College Hills, MD
  • Average rainfall days in September: 11.8 days

The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is November (9.4 days).

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Average snowfall in September
College Hills, MD

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

The month with the highest snowfall is January (2.05").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in September
College Hills, MD

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

The month with the highest number of snowfall days is January (4.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in September /
Average sunshine in September
College Hills, MD

Average daylight in September / Average sunshine in September - College Hills, 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 6min).

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Average sunshine days in September
College Hills, MD

Average sunshine days in September - College Hills, MD
  • Average sunshine days in September: 16.4 days

The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is May (10.8 days).

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Average UV index in September
College Hills, MD

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

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Average cloud cover in September
College Hills, MD

Average cloud cover in September - College Hills, MD
  • Average cloud cover in September: 34

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).

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Average visibility in September
College Hills, MD

Average visibility in September - College Hills, 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).

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College Hills, Maryland, USA

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