September weather forecast
Bowie, MD

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Weather in September

September in Bowie, Maryland, brings the welcome relief of fall. The city experiences a noticeable drop in temperatures, and the September heat seems to bearably linger around 77.9°F (25.5°C). The decrease in daylight hours signals the end of long summer days, giving way to shorter, cooler days. A steady decline in humidity, coupled with a reduction in rainfall, adds to the comfortable conditions. The city gradually transitions into a more soothing, calm atmosphere.

Temperature

The arrival of September correlates with a minor temperature reduction, down from August's 84.4°F (29.1°C) to a still moderately hot 77.9°F (25.5°C). Throughout September, an average nighttime temperature of 62.8°F (17.1°C) is experienced.

Humidity

The average relative humidity in September is 74%.

Rainfall

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

Snowfall

In Bowie, 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 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.

Sunshine

In Bowie, the average sunshine in September is 9.1h.

UV index

In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum daily UV index, 5 in September, converts into the following recommendations:
Undertake precautions - Guarding against sun damage is counselled. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Updated: Aug 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 77.9°F (25.5°C) and 62.8°F (17.1°C) respectively. The average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines relative humidity and air temperature, in August is estimated at 93.2°F (34°C).

What is the average humidity in September?

The average relative humidity in September is 74%.

How many days does it rain in September?

In Bowie, 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.

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

The average day length in September is 12h and 26min.

When are sunrise and sunset in September in Bowie?

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 7:02 am and sunset at 6:50 pm EDT.

How many hours of sunshine does Bowie have in September?

The average sunshine duration in September is 9.1h.

What is the UV index reading in September?

The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health threat from exposure to the Sun's 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
Bowie, MD

Average temperature in September - Bowie, 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
Bowie, MD

Average pressure in September - Bowie, 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
Bowie, MD

Average wind speed in September - Bowie, 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
Bowie, MD

Average humidity in September - Bowie, 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
Bowie, MD

Average rainfall in September - Bowie, 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
Bowie, MD

Average rainfall days in September - Bowie, 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
Bowie, MD

Average snowfall in September - Bowie, 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
Bowie, MD

Average snowfall days in September - Bowie, 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
Bowie, MD

Average daylight in September / Average sunshine in September - Bowie, 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
Bowie, MD

Average sunshine days in September - Bowie, 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
Bowie, MD

Average UV index in September - Bowie, 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
Bowie, MD

Average cloud cover in September - Bowie, 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
Bowie, MD

Average visibility in September - Bowie, 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).

Bowie, Maryland, USA

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