September weather forecast
Bowmans Mill, MD

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Weather in September

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

Temperature

During the shift to September, Bowmans Mill records a mild decrease in average high-temperature, moving from a moderately hot 82.2°F (27.9°C) in August to a still warm 75.6°F (24.2°C). In September, Bowmans Mill records an average nighttime temperature of 55.8°F (13.2°C).

Humidity

In Bowmans Mill, the average relative humidity in September is 78%.

Rainfall

In Bowmans Mill, in September, during 14.2 rainfall days, 2.09" (53mm) of precipitation is typically accumulated. Throughout the year, in Bowmans Mill, there are 164.7 rainfall days, and 29.17" (741mm) of precipitation is accumulated.

Snowfall

In Bowmans Mill, snow does not fall in May through September.

Daylight

In Bowmans Mill, the average length of the day in September 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 September, the average sunshine is 8.8h.

UV index

In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: A maximum high UV index of 4 in September translates into the following recommendations:
Exercise prevention - Warding off sunburn is urged. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Updated: Aug 27, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are September temperatures?

The high-temperature, in September, in Bowmans Mill, is 75.6°F (24.2°C), while the low-temperature averages to 55.8°F (13.2°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which factors the actual air temperature with the relative humidity, in August is calculated to be 87.8°F (31°C).

What is the average humidity in September?

In Bowmans Mill, the average relative humidity in September is 78%.

How much does it rain in September?

In Bowmans Mill, in September, it is raining for 14.2 days, with typically 2.09" (53mm) of accumulated precipitation.

When it does not snow?

In Bowmans Mill, snow does not fall in May through September.

Does it snow in Bowmans Mill in September?

In Bowmans Mill, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September?

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

When is the sunrise / sunset in September?

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.

How many hours of sunshine does Bowmans Mill have in September?

In September, the average sunshine duration is 8.8h.

What is the UV index reading in September?

The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium hazard to health 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
Bowmans Mill, MD

Average temperature in September - Bowmans Mill, 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
Bowmans Mill, MD

Average pressure in September - Bowmans Mill, 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
Bowmans Mill, MD

Average wind speed in September - Bowmans Mill, 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
Bowmans Mill, MD

Average humidity in September - Bowmans Mill, 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
Bowmans Mill, MD

Average rainfall in September - Bowmans Mill, 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
Bowmans Mill, MD

Average rainfall days in September - Bowmans Mill, 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
Bowmans Mill, MD

Average snowfall in September - Bowmans Mill, 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
Bowmans Mill, MD

Average snowfall days in September - Bowmans Mill, 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
Bowmans Mill, MD

Average daylight in September / Average sunshine in September - Bowmans Mill, 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
Bowmans Mill, MD

Average sunshine days in September - Bowmans Mill, 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
Bowmans Mill, MD

Average UV index in September - Bowmans Mill, 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
Bowmans Mill, MD

Average cloud cover in September - Bowmans Mill, 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
Bowmans Mill, MD

Average visibility in September - Bowmans Mill, 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).

Bowmans Mill, Maryland, USA

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