March Weather in Ocean City Maryland, United States

Daily high temperatures increase by 6°F, from 49°F to 56°F, rarely falling below 38°F or exceeding 67°F.

Daily low temperatures increase by 7°F, from 34°F to 41°F, rarely falling below 23°F or exceeding 51°F.

For reference, on July 21, the hottest day of the year, temperatures in Ocean City typically range from 71°F to 84°F, while on January 29, the coldest day of the year, they range from 29°F to 44°F.

The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on March. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Tsukawaki, Japan (7,218 miles away) and Uenohara, Japan (6,887 miles) are the far-away foreign places with temperatures most similar to Ocean City (view comparison).

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The month of March in Ocean City experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 48% throughout the month.

The clearest day of the month is March 30, with clear, mostly clear, or partly cloudy conditions 53% of the time.

For reference, on January 5, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 51%, while on October 12, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 64%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Ocean City, the chance of a wet day over the course of March is essentially constant, remaining around 29% throughout.

For reference, the year's highest daily chance of a wet day is 40% on August 7, and its lowest chance is 21% on October 20.

Over the course of March in Ocean City, the chance of a day with only rain increases from 25% to 29%, the chance of a day with mixed snow and rain decreases from 3% to 1%, and the chance of a day with only snow remains an essentially constant 1% throughout.

Rainfall

To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during March in Ocean City is gradually increasing, starting the month at 3.2 inches, when it rarely exceeds 5.6 inches or falls below 1.2 inches, and ending the month at 3.7 inches, when it rarely exceeds 6.3 inches or falls below 1.4 inches.

The highest average 31-day accumulation is 3.7 inches on March 28.

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day snowfall during March in Ocean City is decreasing, starting the month at 1.9 inches, when it rarely exceeds 6.9 inches or falls below -0.0 inches, and ending the month at 0.2 inches, when it rarely exceeds 1.0 inches or falls below -0.0 inches.

Over the course of March in Ocean City, the length of the day is rapidly increasing. From the start to the end of the month, the length of the day increases by 1 hour, 15 minutes, implying an average daily increase of 2 minutes, 29 seconds, and weekly increase of 17 minutes, 25 seconds.

The shortest day of the month is March 1, with 11 hours, 22 minutes of daylight and the longest day is March 31, with 12 hours, 37 minutes of daylight.

The earliest sunrise of the month in Ocean City is 6:21 AM on March 8 and the latest sunrise is 58 minutes later at 7:20 AM on March 9.

The earliest sunset is 5:53 PM on March 1 and the latest sunset is 1 hour, 29 minutes later at 7:22 PM on March 31.

Daylight saving time (DST) starts at 3:00 AM on March 9, 2025, shifting sunrise and sunset to be an hour later.

For reference, on June 21, the longest day of the year, the Sun rises at 5:37 AM and sets 14 hours, 50 minutes later, at 8:27 PM, while on December 21, the shortest day of the year, it rises at 7:13 AM and sets 9 hours, 30 minutes later, at 4:43 PM.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

The figure below presents a compact representation of key lunar data for March 2025. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The chance that a given day will be muggy in Ocean City is essentially constant during March, remaining around 0% throughout.

For reference, on August 2, the muggiest day of the year, there are muggy conditions 81% of the time, while on February 9, the least muggy day of the year, there are muggy conditions 0% of the time.

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Ocean City is gradually decreasing during March, decreasing from 14.6 miles per hour to 13.7 miles per hour over the course of the month.

For reference, on January 13, the windiest day of the year, the daily average wind speed is 15.3 miles per hour, while on July 26, the calmest day of the year, the daily average wind speed is 9.3 miles per hour.

The wind direction in Ocean City during March is predominantly out of the north from March 1 to March 30 and the south from March 30 to March 31.

Ocean City is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average surface water temperature in Ocean City is increasing during March, rising by 4°F, from 41°F to 45°F, over the course of the month.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season in Ocean City typically lasts for 7.4 months (225 days), from around March 31 to around November 12, rarely starting before March 15 or after April 18, and rarely ending before October 25 or after November 30.

The month of March in Ocean City is more likely than not fully outside of the growing season, with the chance that a given day is in the growing season rapidly increasing from 0% to 49% over the course of the month.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

The average accumulated growing degree days in Ocean City are gradually increasing during March, increasing by 51°F, from 35°F to 87°F, over the course of the month.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy in Ocean City is increasing during March, rising by 1.3 kWh, from 3.8 kWh to 5.1 kWh, over the course of the month.