September weather forecast
Smithbrooke, MD

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Weather in September

The first month of the autumn, September, is still a warm month in Smithbrooke, Maryland, with an average temperature ranging between max 76.6°F (24.8°C) and min 65.1°F (18.4°C).

Temperature

In September, the average high-temperature marginally decreases from a warm 82.9°F (28.3°C) in August to a still moderately hot 76.6°F (24.8°C). Smithbrooke encounters an average low-temperature of 65.1°F (18.4°C) during September nights.

Humidity

The average relative humidity in September is 76%.

Rainfall

In Smithbrooke, in September, during 12.3 rainfall days, 1.06" (27mm) of precipitation is typically accumulated. Throughout the year, there are 132.3 rainfall days, and 15.83" (402mm) of precipitation is accumulated.

Snowfall

April through October are months without snowfall.

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

Sunshine

The average sunshine in September is 9.2h.

UV index

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: In September, a daily UV index of 5 turns into the following recommendations:
Take precautions - Protection against sun damage is advised. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Updated: Jul 11, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in September?

In Smithbrooke, 76.6°F (24.8°C) is the average high-temperature and 65.1°F (18.4°C) is the average low-temperature during September. The average heat index (a.k.a. 'felt air temperature', 'real feel'), which represents the influence of relative humidity on air temperature, in August is calculated to be 89.6°F (32°C).

What is the average humidity in September?

The average relative humidity in September is 76%.

How many days does it rain in September?

In Smithbrooke, in September, during 12.3 rainfall days, 1.06" (27mm) of precipitation is typically accumulated.

When it does not snow?

In Smithbrooke, snow does not fall in April through October.

What is the average length of the day in September in Smithbrooke?

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

When are sunrise and sunset in September in Smithbrooke?

On the first day of September, sunrise is at 6:36 am and sunset at 7:36 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 Smithbrooke have in September?

The average sunshine duration in September is 9.2h.

How high is the UV index in September?

In September, the average daily maximum UV index in Smithbrooke is 5. A UV Index reading of 3 to 5 represents 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
Smithbrooke, MD

Average temperature in September - Smithbrooke, MD
  • Average high temperature in September: 76.6°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (40.6°F).

  • Average low temperature in September: 65.1°F

The month with the highest average low temperature is July (71.6°F).
The coldest month (with the lowest average low temperature) is January (30.2°F).

Average pressure in September
Smithbrooke, MD

Average pressure in September - Smithbrooke, MD
  • Average pressure in September: 30.05"Hg

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in September
Smithbrooke, MD

Average wind speed in September - Smithbrooke, MD
  • Average wind speed in September: 7.7mph

The windiest months (with the highest average wind speed) are January and March (9.9mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).

Average humidity in September
Smithbrooke, MD

Average humidity in September - Smithbrooke, MD
  • Average humidity in September: 76%

The month with the highest relative humidity is May (79%).
The months with the lowest relative humidity are January and November (72%).

Average rainfall in September
Smithbrooke, MD

Average rainfall in September - Smithbrooke, MD
  • Average rainfall in September: 1.06"

The wettest month (with the highest rainfall) is August (2.4").
The driest month (with the least rainfall) is January (0.67").

Average rainfall days in September
Smithbrooke, MD

Average rainfall days in September - Smithbrooke, MD
  • Average rainfall days in September: 12.3 days

The month with the highest number of rainy days is July (15.3 days).
The month with the least rainy days is November (6.6 days).

Average snowfall in September
Smithbrooke, MD

Average snowfall in September - Smithbrooke, MD
  • Average snowfall in September: 0"

The month with the highest snowfall is January (0.75").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September
Smithbrooke, MD

Average snowfall days in September - Smithbrooke, MD
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (2.9 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
Smithbrooke, MD

Average daylight in September / Average sunshine in September - Smithbrooke, MD
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 48min).
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).

Average sunshine days in September
Smithbrooke, MD

Average sunshine days in September - Smithbrooke, MD
  • Average sunshine days in September: 16.3 days

The month with the most sunshine days is November (21.7 days).
The month with the least sunshine days is August (13.7 days).

Average UV index in September
Smithbrooke, MD

Average UV index in September - Smithbrooke, 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
Smithbrooke, MD

Average cloud cover in September - Smithbrooke, MD
  • Average cloud cover in September: 33

The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 27).

Average visibility in September
Smithbrooke, MD

Average visibility in September - Smithbrooke, 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).

Smithbrooke, Maryland, USA

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