September weather forecast
Brunswick, MD

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Weather in September

September brings the onset of fall to Brunswick with a noticeable drop in temperature and a gentle shift in the climate. The weather stands out with the skies having the highest percentage of cloud cover throughout the year, around 37%. October continues to witness this cloud cover, making for scenic evening skies. With vibrant fall colors decorating the city, September holds its unique charm for locals and visitors alike.

Temperature

September ushers in a minor alteration in Brunswick's climate, with the average high-temperature moving from August's 83.8°F (28.8°C) to a still moderately hot 76.8°F (24.9°C). During September, Brunswick experiences a consistent low-temperature average of 57.2°F (14°C).

Humidity

In Brunswick, the average relative humidity in September is 77%.

Rainfall

In Brunswick, in September, during 13.8 rainfall days, 2.01" (51mm) of precipitation is typically accumulated. In Brunswick, during the entire year, the rain falls for 163.3 days and collects up to 29.84" (758mm) of precipitation.

Snowfall

In Brunswick, Maryland, snow does not fall in May through October.

Daylight

In Brunswick, 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 7:40 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 9h.

UV index

In Brunswick, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: A daily high UV index of 4 in September leads to these guidelines:
Make use of precautions - It is urged to ward off sun damage. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
Updated: Jun 17, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in September?

During September, Brunswick experiences an average high-temperature of 76.8°F (24.9°C) and a low-temperature of 57.2°F (14°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, in August is computed to be 91.4°F (33°C).

What is the average humidity in September in Brunswick?

The average relative humidity in September is 77%.

How many days does it rain in September?

In Brunswick, in September, it is raining for 13.8 days, with typically 2.01" (51mm) 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 Brunswick, the average day length in September is 12h and 26min.

When are sunrise and sunset in September?

On the first day of September, sunrise is at 6:39 am and sunset at 7:40 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 6:54 pm EDT.

How long on average sun shines in September?

In September, the average sunshine duration is 9h.

What is the UV index intensity in September?

In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate health threat 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
Brunswick, MD

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

  • Average low temperature in September: 57.2°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).

Average pressure in September
Brunswick, MD

Average pressure in September - Brunswick, 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
Brunswick, MD

Average wind speed in September - Brunswick, MD
  • Average wind speed in September: 5mph

The windiest month (with the highest average wind speed) is March (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).

Average humidity in September
Brunswick, MD

Average humidity in September - Brunswick, MD
  • Average humidity in September: 77%

The month with the highest relative humidity is October (79%).
The months with the lowest relative humidity are April and July (74%).

Average rainfall in September
Brunswick, MD

Average rainfall in September - Brunswick, MD
  • Average rainfall in September: 2.01"

The wettest month (with the highest rainfall) is May (3.35").
The driest month (with the least rainfall) is January (1.97").

Average rainfall days in September
Brunswick, MD

Average rainfall days in September - Brunswick, MD
  • Average rainfall days in September: 13.8 days

The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is January (9.1 days).

Average snowfall in September
Brunswick, MD

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

The month with the highest snowfall is January (3.62").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
Brunswick, MD

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

The month with the highest number of snowfall days is January (6.9 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
Brunswick, MD

Average daylight in September / Average sunshine in September - Brunswick, 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 0min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The months with the least sunshine are January and February (Average sunshine: 5h and 0min).

Average sunshine days in September
Brunswick, MD

Average sunshine days in September - Brunswick, MD
  • Average sunshine days in September: 14.4 days

The month with the most sunshine days is November (18.6 days).
The month with the least sunshine days is May (10.7 days).

Average UV index in September
Brunswick, MD

Average UV index in September - Brunswick, MD
  • Average UV index in September: 4

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
Brunswick, MD

Average cloud cover in September - Brunswick, MD
  • Average cloud cover in September: 37

The months with the most cloud cover are February and March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 31).

Average visibility in September
Brunswick, MD

Average visibility in September - Brunswick, MD
  • Average visibility in September: 5mi

The months with the highest visibility are February, March, April, June, July, August and November (6mi).
The months with the lowest visibility are January, May, September, October and December (5mi).

Brunswick, Maryland, USA

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