September weather forecast
South Laurel, MD

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Weather in September

The first month of the autumn, September, is still a warm month in South Laurel, Maryland, with an average temperature varying between 77.9°F (25.5°C) and 62.8°F (17.1°C).

Temperature

A mild shift in the average high-temperature occurs in September, reducing from 84.4°F (29.1°C) in August to a still moderately hot 77.9°F (25.5°C). In September, the temperature drops to an average of 62.8°F (17.1°C) at night.

Humidity

The average relative humidity in September is 74%.

Rainfall

In South Laurel, in September, it is raining for 12.6 days, with typically 2.13" (54mm) of accumulated precipitation. In South Laurel, during the entire year, the rain falls for 156.7 days and collects up to 31.81" (808mm) of precipitation.

Snowfall

May through October are months without snowfall.

Daylight

In South Laurel, the average length of the day in September 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, sunrise is at 7:03 am and sunset at 6:51 pm EDT.

Sunshine

In South Laurel, the average sunshine in September is 9.1h.

UV index

The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: In September, the maximum UV index of 5 suggests this advice:
Undertake precautions - Guarding against sun damage is counselled. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Updated: Aug 23, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are September temperatures in South Laurel?

In South Laurel, 77.9°F (25.5°C) is the average high-temperature and 62.8°F (17.1°C) is the average low-temperature during September. The average heat index (a.k.a. 'felt air temperature', 'feels like'), which represents the influence of relative humidity on air temperature, in August is appraised at 93.2°F (34°C).

What is the average humidity in September?

In September, the average relative humidity is 74%.

How many days does it rain in September?

In South Laurel, in September, it is raining for 12.6 days, with typically 2.13" (54mm) of accumulated precipitation.

When it does not snow?

May through October are months without snowfall.

How many hours of daylight does South Laurel have in September?

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

What time are sunrise and sunset in September?

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 7:03 am and sunset at 6:51 pm EDT.

How many hours of sunshine does South Laurel have in September?

The average sunshine duration in September is 9.1h.

What is the UV index reading in September?

In South Laurel, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium health risk from unsafe 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
South Laurel, MD

Average temperature in September - South Laurel, MD
  • Average high temperature in September: 77.9°F

The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (39.7°F).

  • Average low temperature in September: 62.8°F

The month with the highest average low temperature is July (69.8°F).
The coldest month (with the lowest average low temperature) is January (28°F).

Average pressure in September
South Laurel, MD

Average pressure in September - South Laurel, 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
South Laurel, MD

Average wind speed in September - South Laurel, MD
  • Average wind speed in September: 6.4mph

The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.6mph).

Average humidity in September
South Laurel, MD

Average humidity in September - South Laurel, MD
  • Average humidity in September: 74%

The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is April (71%).

Average rainfall in September
South Laurel, MD

Average rainfall in September - South Laurel, MD
  • Average rainfall in September: 2.13"

The wettest month (with the highest rainfall) is August (3.62").
The driest month (with the least rainfall) is January (2.05").

Average rainfall days in September
South Laurel, MD

Average rainfall days in September - South Laurel, MD
  • Average rainfall days in September: 12.6 days

The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (8.9 days).

Average snowfall in September
South Laurel, MD

Average snowfall in September - South Laurel, MD
  • Average snowfall in September: 0"

The month with the highest snowfall is January (2.36").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
South Laurel, MD

Average snowfall days in September - South Laurel, MD
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (4.3 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
South Laurel, MD

Average daylight in September / Average sunshine in September - South Laurel, 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
South Laurel, MD

Average sunshine days in September - South Laurel, MD
  • Average sunshine days in September: 16 days

The month with the most sunshine days is November (19 days).
The month with the least sunshine days is May (11.5 days).

Average UV index in September
South Laurel, MD

Average UV index in September - South Laurel, 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
South Laurel, MD

Average cloud cover in September - South Laurel, 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
South Laurel, MD

Average visibility in September - South Laurel, 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).

South Laurel, Maryland, USA

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