January Weather in Edgartown Massachusetts, United States

Daily high temperatures decrease by 3°F, from 42°F to 38°F, rarely falling below 26°F or exceeding 53°F. The lowest daily average high temperature is 38°F on January 30.

Daily low temperatures decrease by 3°F, from 28°F to 25°F, rarely falling below 11°F or exceeding 41°F. The lowest daily average low temperature is 25°F on January 30.

For reference, on July 24, the hottest day of the year, temperatures in Edgartown typically range from 64°F to 78°F, while on January 30, the coldest day of the year, they range from 25°F to 38°F.

The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on January. 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.

Çaykara, Turkey (5,305 miles away) is the far-away foreign place with temperatures most similar to Edgartown (view comparison).

© OpenStreetMap contributors

Compare Edgartown to another city:

CompareMap

The month of January in Edgartown experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 52% throughout the month.

The clearest day of the month is January 31, with clear, mostly clear, or partly cloudy conditions 49% of the time.

For reference, on May 23, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 54%, while on September 5, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 63%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Edgartown, the chance of a wet day over the course of January is gradually decreasing, starting the month at 28% and ending it at 26%.

For reference, the year's highest daily chance of a wet day is 31% on December 10, and its lowest chance is 20% on July 3.

Over the course of January in Edgartown, the chance of a day with only rain decreases from 22% to 17%, the chance of a day with mixed snow and rain remains an essentially constant 5% throughout, and the chance of a day with only snow remains an essentially constant 2% 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 January in Edgartown is gradually decreasing, starting the month at 3.0 inches, when it rarely exceeds 4.9 inches or falls below 1.5 inches, and ending the month at 2.6 inches, when it rarely exceeds 4.6 inches or falls below 1.1 inches.

The lowest average 31-day accumulation is 2.6 inches on January 30.

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 January in Edgartown is increasing, starting the month at 2.6 inches, when it rarely exceeds 7.4 inches, and ending the month at 4.1 inches, when it rarely exceeds 10.8 inches or falls below 0.2 inches.

Over the course of January in Edgartown, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 47 minutes, implying an average daily increase of 1 minute, 34 seconds, and weekly increase of 10 minutes, 55 seconds.

The shortest day of the month is January 1, with 9 hours, 15 minutes of daylight and the longest day is January 31, with 10 hours, 2 minutes of daylight.

The latest sunrise of the month in Edgartown is 7:08 AM on January 5 and the earliest sunrise is 13 minutes earlier at 6:54 AM on January 31.

The earliest sunset is 4:22 PM on January 1 and the latest sunset is 34 minutes later at 4:56 PM on January 31.

Daylight saving time is observed in Edgartown during 2024, but it neither starts nor ends during January, so the entire month is in daylight saving time.

For reference, on June 20, the longest day of the year, the Sun rises at 5:08 AM and sets 15 hours, 10 minutes later, at 8:18 PM, while on December 21, the shortest day of the year, it rises at 7:05 AM and sets 9 hours, 11 minutes later, at 4:15 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 January 2024. 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 Edgartown is essentially constant during January, remaining around 0% throughout.

For reference, on August 1, the muggiest day of the year, there are muggy conditions 53% of the time, while on January 1, 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 Edgartown is essentially constant during January, remaining within 0.2 miles per hour of 17.7 miles per hour throughout.

For reference, on January 13, the windiest day of the year, the daily average wind speed is 17.8 miles per hour, while on July 24, the calmest day of the year, the daily average wind speed is 11.3 miles per hour.

The highest daily average wind speed during January is 17.8 miles per hour on January 13.

The hourly average wind direction in Edgartown throughout January is predominantly from the west, with a peak proportion of 47% on January 5.

Edgartown 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 Edgartown is decreasing during January, falling by 4°F, from 44°F to 40°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 Edgartown typically lasts for 6.6 months (200 days), from around April 19 to around November 5, rarely starting before March 28 or after May 10, and rarely ending before October 19 or after November 24.

The month of January in Edgartown is reliably fully outside of the growing season.

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 Edgartown are essentially constant during January, remaining within 1°F of 2°F throughout.

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 Edgartown is gradually increasing during January, rising by 0.6 kWh, from 1.7 kWh to 2.4 kWh, over the course of the month.