September weather forecast
Glenmont Hills, MD

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Weather in September

September, the first month of the autumn in Glenmont Hills, is also a moderately hot month, with an average temperature ranging between min 60.8°F (16°C) and max 78.1°F (25.6°C).

Temperature

A subtle change in temperatures is noted as August gives way to September, with average highs reducing from a warm 84.9°F (29.4°C) to a still moderately hot 78.1°F (25.6°C). Glenmont Hills reports an average nighttime low-temperature of 60.8°F (16°C) in September.

Humidity

The average relative humidity in September is 74%.

Rainfall

In Glenmont Hills, in September, during 12.5 rainfall days, 2.24" (57mm) of precipitation is typically accumulated. In Glenmont Hills, during the entire year, the rain falls for 160.9 days and collects up to 32.99" (838mm) of precipitation.

Snowfall

May through October are months without snowfall in Glenmont Hills.

Daylight

In September, the average length of the day in Glenmont Hills, Maryland, 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 6:52 pm EDT.

Sunshine

The average sunshine in September is 8.9h.

UV index

In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: In September, a regular UV index of 5 translates into these guidelines:
Undertake protective steps - Preventing sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.

Frequently asked questions

What is the average September temperature?

During September, Glenmont Hills experiences an average high-temperature of 78.1°F (25.6°C) and a low-temperature of 60.8°F (16°C). In August, the average heat index (a.k.a. 'feels like', 'real feel'), which represents the influence of relative humidity on air temperature, is evaluated at 93.2°F (34°C).

What is the average humidity in September?

The average relative humidity in September is 74%.

How many days does it rain in September?

In Glenmont Hills, during September, the rain falls for 12.5 days and regularly aggregates up to 2.24" (57mm) of precipitation.

When it does not snow?

May through October are months without snowfall.

How many hours of daylight does Glenmont Hills have in September?

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

When are sunrise and sunset in September?

On the first day of September, sunrise is at 6:37 am and sunset at 7:38 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 6:52 pm EDT.

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

The average sunshine duration in September is 8.9h.

How high is the UV index in September?

In Glenmont Hills, 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 exposure to the Sun's 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
Glenmont Hills, MD

Average temperature in September - Glenmont Hills, 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: 60.8°F

The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).

Average pressure in September
Glenmont Hills, MD

Average pressure in September - Glenmont 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 (29.95"Hg).

Average wind speed in September
Glenmont Hills, MD

Average wind speed in September - Glenmont Hills, MD
  • Average wind speed in September: 5.7mph

The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).

Average humidity in September
Glenmont Hills, MD

Average humidity in September - Glenmont Hills, 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
Glenmont Hills, MD

Average rainfall in September - Glenmont Hills, MD
  • Average rainfall in September: 2.24"

The wettest month (with the highest rainfall) is August (4.13").
The driest month (with the least rainfall) is January (2.17").

Average rainfall days in September
Glenmont Hills, MD

Average rainfall days in September - Glenmont Hills, MD
  • Average rainfall days in September: 12.5 days

The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is November (8.8 days).

Average snowfall in September
Glenmont Hills, MD

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

The months with the highest snowfall are January and March (3.03").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
Glenmont Hills, MD

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

The months with the highest number of snowfall days are January and February (5.1 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
Glenmont Hills, MD

Average daylight in September / Average sunshine in September - Glenmont 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: 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
Glenmont Hills, MD

Average sunshine days in September - Glenmont Hills, MD
  • Average sunshine days in September: 15.6 days

The month with the most sunshine days is November (19.4 days).
The months with the least sunshine days are May and July (11 days).

Average UV index in September
Glenmont Hills, MD

Average UV index in September - Glenmont 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).

Average cloud cover in September
Glenmont Hills, MD

Average cloud cover in September - Glenmont Hills, MD
  • Average cloud cover in September: 37

The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 31).

Average visibility in September
Glenmont Hills, MD

Average visibility in September - Glenmont Hills, 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).

Glenmont Hills, Maryland, USA

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