September weather forecast and climate
Dundalk, MD

Weather in September

September, the first month of the autumn, in Dundalk, is still a warm month, with average temperature varying between 62.4°F (16.9°C) and 76.8°F (24.9°C).

Temperature

In Dundalk, Maryland, the average high-temperature in September slightly decreases, from a moderately hot 82.9°F (28.3°C) in August, to a still warm 76.8°F (24.9°C). In September, in Dundalk, the average low-temperature is 62.4°F (16.9°C).

Humidity

In September, the average relative humidity is 75%.

Rainfall

The month with the least rainfall is September when the rain falls for 6 days and typically collects 0.24" (6mm) of precipitation.

Snowfall

In Dundalk snow does not fall in April through October.

Ocean temperature

In September, the average ocean temperature is 73.6°F (23.1°C).
Note: For individuals prone to feeling cold, swimming in 73.4°F (23°C) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 73.6°F (23.1°C).

Daylight

In September, the average length of the day is 12.4h.

Sunshine

In Dundalk, the average sunshine in September is 9.2h.

UV index

The average daily maximum UV index in Dundalk is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to the UV radiation for the average person.
Note: The average daily UV index of 5 transform into the following instructions:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
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FAQ

What is the average humidity in September in Dundalk?

In Dundalk, Maryland, the average relative humidity in September is 75%.

What is the driest month in Dundalk?

September is the month with the least rainfall in Dundalk, Maryland. Rain falls for 6 days and accumulates 0.24" (6mm) of precipitation.

How much does it rain in Dundalk in September?

In September, the rain falls for 6 days. Throughout September, 0.24" (6mm) of precipitation is accumulated.

When it does not snow in Dundalk?

April through October are months without snowfall in Dundalk.

What is the water temperature in September in Dundalk?

In Dundalk, the average seawater temperature in September is 73.6°F (23.1°C). A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 73.6°F (23.1°C) water.

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

In September, the average length of the day is 12.4h.

How many hours of sunshine does Dundalk have in September?

The average sunshine in September in Dundalk is 9.2h.

How high is the UV index in September in Dundalk?

The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to the Sun's UV rays.

Average temperature in September
Dundalk, MD

Average temperature in September - Dundalk, MD
  • Average high temperature in September: 76.8°F

The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (38.8°F).

  • Average low temperature in September: 62.4°F

The month with the highest average low temperature is July (70.3°F).
The coldest month (with the lowest average low temperature) is January (27.7°F).

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Average pressure in September
Dundalk, MD

Average pressure in September - Dundalk, MD
  • Average pressure in September: 30.05"

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

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Average wind speed in September
Dundalk, MD

Average wind speed in September - Dundalk, MD
  • Average wind speed in September: 6.8mph

The windiest month (with the highest average wind speed) is March (9.4mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).

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Average humidity in September
Dundalk, MD

Average humidity in September - Dundalk, MD
  • Average humidity in September: 75%

The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is April (72%).

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Average rainfall in September
Dundalk, MD

Average rainfall in September - Dundalk, MD
  • Average rainfall in September: 0.24"

The wettest month (with the highest rainfall) is August (1.06").
The driest month (with the least rainfall) is September (0.24").

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Average rainfall days in September
Dundalk, MD

Average rainfall days in September - Dundalk, MD
  • Average rainfall days in September: 6 days

The month with the highest number of rainy days is July (10.3 days).
The month with the least rainy days is November (4.1 days).

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Average snowfall in September
Dundalk, MD

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

The month with the highest snowfall is January (0.31").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in September
Dundalk, MD

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

The month with the highest number of snowfall days is February (2.4 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average sea temperature in September
Dundalk, MD

Average sea temperature in September - Dundalk, MD
  • Average sea temperature in September: 73.5°F

The best month for swimming (with the highest average sea temperature) is August (77.5°F).
The coldest month (with the lowest average sea temperature) is February (44.5°F).

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Average daylight in September /
Average sunshine in September
Dundalk, MD

Average daylight in September / Average sunshine in September - Dundalk, MD
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in September: 9.2h

The month with the most sunshine is July (Average sunshine: 10.9h).
The month with the least sunshine is February (Average sunshine: 5h).

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Average sunshine days in September
Dundalk, MD

Average sunshine days in September - Dundalk, MD
  • Average sunshine days in September: 21.5 days

The month with the most sunshine days is January (24.7 days).
The month with the least sunshine days is July (16.9 days).

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Average UV index in September
Dundalk, MD

Average UV index in September - Dundalk, MD
  • Average UV index in September: 5

Months with the highest UV index are May, June, July and August (UV index 6).
Months with the lowest UV index are January, February and December (UV index 2).

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Average cloud cover in September
Dundalk, MD

Average cloud cover in September - Dundalk, MD
  • Average cloud cover in September: 34

Months with the most cloud cover are February and March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 29).

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Average visibility in September
Dundalk, MD

Average visibility in September - Dundalk, MD
  • Average visibility in September: 6mi

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

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