September weather forecast
Green Hill Acres, MD

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Weather in September

September, the first month of the autumn in Green Hill Acres, is also a moderately hot month, with an average temperature varying between 55.8°F (13.2°C) and 75.6°F (24.2°C).

Temperature

The shift from August to September coincides with a small decrease in the average high-temperature, down to a still moderately hot 75.6°F (24.2°C) from a warm 82.2°F (27.9°C). During the nights in September, an average low-temperature of 55.8°F (13.2°C) is observed.

Humidity

The average relative humidity in September in Green Hill Acres is 78%.

Rainfall

In Green Hill Acres, in September, it is raining for 14.2 days, with typically 2.09" (53mm) of accumulated precipitation. Throughout the year, in Green Hill Acres, there are 164.7 rainfall days, and 29.17" (741mm) of precipitation is accumulated.

Snowfall

In Green Hill Acres, snow does not fall in May through September.

Daylight

In September, the average length of the day in Green Hill Acres is 12h and 26min.
On the first day of September, sunrise is at 6:39 am and sunset at 7:41 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 6:54 pm EDT.

Sunshine

In Green Hill Acres, the average sunshine in September is 8.8h.

UV index

In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for average individuals.
Note: The maximum daily UV index, 4 in September, converts into the following recommendations:
Undertake protective steps - Recommendations to avoid sunburn are issued. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
Updated: Jul 30, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Green Hill Acres in September?

In Green Hill Acres, in September, the average high-temperature is 75.6°F (24.2°C), and the average low-temperature is 55.8°F (13.2°C). The average heat index (a.k.a. 'real feel', 'feels like'), which combines air temperature and relative humidity, in August is evaluated at 87.8°F (31°C).

What is the average humidity in September?

The average relative humidity in September is 78%.

How many days does it rain in September?

In Green Hill Acres, during September, the rain falls for 14.2 days and regularly aggregates up to 2.09" (53mm) of precipitation.

When it does not snow?

In Green Hill Acres, snow does not fall in May through September.

Does it snow in September?

In Green Hill Acres, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Green Hill Acres have in September?

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

When is the sunrise / sunset in September?

In September, on the first day of the month, sunrise is at 6:39 am and sunset at 7:41 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 6:54 pm EDT.

How many hours of sunshine does Green Hill Acres have in September?

The average sunshine duration in September is 8.8h.

What is the UV index intensity in September?

In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium health risk 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
Green Hill Acres, MD

Average temperature in September - Green Hill Acres, MD
  • Average high temperature in September: 75.6°F

The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (36.1°F).

  • Average low temperature in September: 55.8°F

The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (22.8°F).

Average pressure in September
Green Hill Acres, MD

Average pressure in September - Green Hill Acres, MD
  • Average pressure in September: 30.06"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
Green Hill Acres, MD

Average wind speed in September - Green Hill Acres, MD
  • Average wind speed in September: 5mph

The windiest month (with the highest average wind speed) is January (7.7mph).
The calmest months (with the lowest average wind speed) are July and August (4.5mph).

Average humidity in September
Green Hill Acres, MD

Average humidity in September - Green Hill Acres, MD
  • Average humidity in September: 78%

The months with the highest relative humidity are May and October (79%).
The months with the lowest relative humidity are April and July (75%).

Average rainfall in September
Green Hill Acres, MD

Average rainfall in September - Green Hill Acres, MD
  • Average rainfall in September: 2.09"

The wettest month (with the highest rainfall) is May (3.11").
The driest month (with the least rainfall) is February (1.97").

Average rainfall days in September
Green Hill Acres, MD

Average rainfall days in September - Green Hill Acres, MD
  • Average rainfall days in September: 14.2 days

The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is January (8.8 days).

Average snowfall in September
Green Hill Acres, MD

Average snowfall in September - Green Hill Acres, MD
  • Average snowfall in September: 0"

The month with the highest snowfall is January (4.21").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in September
Green Hill Acres, MD

Average snowfall days in September - Green Hill Acres, MD
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Green Hill Acres, MD

Average daylight in September / Average sunshine in September - Green Hill Acres, 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 24min).

  • Average sunshine in September: 8h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

Average sunshine days in September
Green Hill Acres, MD

Average sunshine days in September - Green Hill Acres, MD
  • Average sunshine days in September: 13.9 days

The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is May (10.7 days).

Average UV index in September
Green Hill Acres, MD

Average UV index in September - Green Hill Acres, MD
  • Average UV index in September: 4

The months with the highest UV index are May, June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in September
Green Hill Acres, MD

Average cloud cover in September - Green Hill Acres, MD
  • Average cloud cover in September: 38

The months with the most cloud cover are January, February, March and December (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 31).

Average visibility in September
Green Hill Acres, MD

Average visibility in September - Green Hill Acres, MD
  • Average visibility in September: 5mi

The months with the highest visibility are April, June, July, August, November and December (6mi).
The months with the lowest visibility are January, February, March, May, September and October (5mi).

Green Hill Acres, Maryland, USA

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