September weather forecast
Ocean City, MD

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The Ocean city in Maryland, with water on both sides of the city
The Ocean city in Maryland, with water on both sides of the city

Weather in September

September in Ocean City, Maryland, signals a fine mix of warm weather and a gentle pre-fall ambiance. During this month, the sea surface temperature sees a minor decline to 73.5°F (23.1°C). Festivities follow the residents of Ocean City from summer into fall, with the weather lending a congenial atmosphere for outdoor activities. However, the wind speed elevates slightly, creating a breezy charm about the city. This period marks the tail-end of the summer tourist influx and transitions smoothly into the calm before the winter.

Temperature

September notes an average high-temperature of a still warm 74.3°F (23.5°C), subtly differing from August's 79.3°F (26.3°C). In Ocean City, September is characterized by an average low-temperature of 69.4°F (20.8°C), indicating a minor drop from daytime highs.

Humidity

In September, the average relative humidity is 77%.

Rainfall

In Ocean City, Maryland, in September, during 13.3 rainfall days, 1.81" (46mm) of precipitation is typically accumulated. Throughout the year, there are 150.3 rainfall days, and 23.11" (587mm) of precipitation is accumulated.

Snowfall

In Ocean City, snow does not fall in April through October.

Ocean temperature

In September, the average ocean temperature is 73.6°F (23.1°C).
Note: Imagine a swim in 73.6°F (23.1°C) waters. How you'd feel depends on your cold sensitivity, the sun's rays, the caress of the wind, and the warmth enveloping you. Comparatively, Olympic swimmers train in waters between 77°F (25°C) and 82.4°F (28°C).

Daylight

In September, the average length of the day is 12h and 25min.
On the first day of the month, sunrise is at 6:30 am and sunset at 7:29 pm. On the last day of September, sunrise is at 6:55 am and sunset at 6:44 pm EDT.

Sunshine

In September, the average sunshine in Ocean City is 9.5h.

UV index

In Ocean City, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: In September, a regular UV index of 5 translates into these guidelines:
Ensure safety - Sun damage prevention is strongly urged. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Take note! Sand and water reflections strengthen the Sun's UV exposure.
Updated: Aug 31, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in September?

In Ocean City, in September, the average high-temperature is 74.3°F (23.5°C), and the average low-temperature is 69.4°F (20.8°C).

What is the average humidity in September?

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

How many days does it rain in September?

In Ocean City, in September, during 13.3 rainfall days, 1.81" (46mm) of precipitation is typically accumulated.

When it does not snow?

April through October are months without snowfall.

How warm is the water in September?

In Ocean City, 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 Ocean City?

The average day length in September is 12h and 25min.

When are sunrise and sunset in September?

On the first day of September in Ocean City, Maryland, sunrise is at 6:30 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:44 pm EDT.

How long on average sun shines in September?

In Ocean City, the average sunshine duration in September is 9.5h.

What is the UV index intensity in September?

In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate vulnerability 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
Ocean City, MD

Average temperature in September - Ocean City, MD
  • Average high temperature in September: 74.3°F

The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (42.4°F).

  • Average low temperature in September: 69.4°F

The month with the highest average low temperature is July (74.7°F).
The coldest month (with the lowest average low temperature) is January (34.2°F).

Average pressure in September
Ocean City, MD

Average pressure in September - Ocean City, MD
  • Average pressure in September: 30.04"Hg

The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in September
Ocean City, MD

Average wind speed in September - Ocean City, MD
  • Average wind speed in September: 11.5mph

The windiest month (with the highest average wind speed) is January (13.9mph).
The calmest month (with the lowest average wind speed) is August (9.4mph).

Average humidity in September
Ocean City, MD

Average humidity in September - Ocean City, MD
  • Average humidity in September: 77%

The month with the highest relative humidity is May (82%).
The months with the lowest relative humidity are January and November (74%).

Average rainfall in September
Ocean City, MD

Average rainfall in September - Ocean City, MD
  • Average rainfall in September: 1.81"

The wettest month (with the highest rainfall) is July (2.56").
The driest month (with the least rainfall) is January (1.46").

Average rainfall days in September
Ocean City, MD

Average rainfall days in September - Ocean City, MD
  • Average rainfall days in September: 13.3 days

The month with the highest number of rainy days is July (16.4 days).
The month with the least rainy days is January (8.9 days).

Average snowfall in September
Ocean City, MD

Average snowfall in September - Ocean City, MD
  • Average snowfall in September: 0"

The month with the highest snowfall is February (0.39").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September
Ocean City, MD

Average snowfall days in September - Ocean City, MD
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (2.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average sea temperature in September
Ocean City, MD

Average sea temperature in September - Ocean City, 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 (41.9°F).

Average daylight in September /
Average sunshine in September
Ocean City, MD

Average daylight in September / Average sunshine in September - Ocean City, 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 3min

The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 5h and 12min).

Average sunshine days in September
Ocean City, MD

Average sunshine days in September - Ocean City, MD
  • Average sunshine days in September: 13.8 days

The month with the most sunshine days is November (18 days).
The month with the least sunshine days is July (12.5 days).

Average UV index in September
Ocean City, MD

Average UV index in September - Ocean City, 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
Ocean City, MD

Average cloud cover in September - Ocean City, MD
  • Average cloud cover in September: 31

The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 25).

Average visibility in September
Ocean City, MD

Average visibility in September - Ocean City, 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).

Ocean City, Maryland, USA

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