September weather forecast
Oak Forest, MD

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Weather in September

The first month of the autumn, September, is also a moderately hot month in Oak Forest, Maryland, with temperature in the range of an average high of 76.8°F (24.9°C) and an average low of 60.4°F (15.8°C).

Temperature

With September's onset, the weather reveals a slight temperature decrease, transitioning from 83.5°F (28.6°C) in August to a still warm 76.8°F (24.9°C). Throughout September, Oak Forest encounters an average temperature drop to a mild 60.4°F (15.8°C).

Humidity

In Oak Forest, the average relative humidity in September is 75%.

Rainfall

In Oak Forest, in September, it is raining for 13.1 days, with typically 2.17" (55mm) of accumulated precipitation. Throughout the year, in Oak Forest, there are 165.5 rainfall days, and 31.65" (804mm) of precipitation is accumulated.

Snowfall

In Oak Forest, snow does not fall in May through October.

Daylight

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

Sunshine

In September, the average sunshine is 9.1h.

UV index

In Oak Forest, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for average individuals.
Note: The maximum UV index of 5 during September leads to these instructions:
Take necessary precautions - Suggestions to elude sunburn are provided. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Updated: Jul 16, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in September?

The average high-temperature and low-temperature during September are 76.8°F (24.9°C) and 60.4°F (15.8°C) respectively. In August, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, is calculated to be 89.6°F (32°C).

What is the average humidity in September?

The average relative humidity in September is 75%.

How many days does it rain in September?

In Oak Forest, in September, it is raining for 13.1 days, with typically 2.17" (55mm) of accumulated precipitation.

When it does not snow?

In Oak Forest, snow does not fall in May through October.

How many hours of daylight does Oak Forest have in September?

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

What time are sunrise and sunset in September?

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.

How long on average sun shines in September?

In Oak Forest, the average sunshine duration in September is 9.1h.

What is the UV index reading in September?

In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium hazard to health from exposure to Sun's UV rays.
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
Oak Forest, MD

Average temperature in September - Oak Forest, MD
  • Average high temperature in September: 76.8°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 (38.1°F).

  • Average low temperature in September: 60.4°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
Oak Forest, MD

Average pressure in September - Oak Forest, 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
Oak Forest, MD

Average wind speed in September - Oak Forest, MD
  • Average wind speed in September: 6.2mph

The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

Average humidity in September
Oak Forest, MD

Average humidity in September - Oak Forest, MD
  • Average humidity in September: 75%

The months with the highest relative humidity are May and October (77%).
The month with the lowest relative humidity is July (71%).

Average rainfall in September
Oak Forest, MD

Average rainfall in September - Oak Forest, MD
  • Average rainfall in September: 2.17"

The wettest month (with the highest rainfall) is August (3.74").
The driest month (with the least rainfall) is January (2.05").

Average rainfall days in September
Oak Forest, MD

Average rainfall days in September - Oak Forest, MD
  • Average rainfall days in September: 13.1 days

The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is January (9.7 days).

Average snowfall in September
Oak Forest, MD

Average snowfall in September - Oak Forest, MD
  • Average snowfall in September: 0"

The month with the highest snowfall is January (2.4").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
Oak Forest, MD

Average snowfall days in September - Oak Forest, MD
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (4.9 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
Oak Forest, MD

Average daylight in September / Average sunshine in September - Oak Forest, 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
Oak Forest, MD

Average sunshine days in September - Oak Forest, MD
  • Average sunshine days in September: 14.5 days

The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is May (10.4 days).

Average UV index in September
Oak Forest, MD

Average UV index in September - Oak Forest, 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, November and December (UV index 2).

Average cloud cover in September
Oak Forest, MD

Average cloud cover in September - Oak Forest, MD
  • Average cloud cover in September: 35

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
Oak Forest, MD

Average visibility in September - Oak Forest, 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).

Oak Forest, Maryland, USA

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