March Weather in Homer Alaska, United States

Daily high temperatures increase by 5°F, from 35°F to 40°F, rarely falling below 24°F or exceeding 46°F.

Daily low temperatures increase by 5°F, from 24°F to 28°F, rarely falling below 9°F or exceeding 36°F.

For reference, on July 30, the hottest day of the year, temperatures in Homer typically range from 50°F to 61°F, while on January 17, the coldest day of the year, they range from 21°F to 31°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.

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The month of March in Homer experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 57% throughout the month. The lowest chance of overcast or mostly cloudy conditions is 55% on March 29.

The clearest day of the month is March 29, with clear, mostly clear, or partly cloudy conditions 45% of the time.

For reference, on December 18, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 66%, while on November 4, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 45%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Homer, the chance of a wet day over the course of March is gradually decreasing, starting the month at 34% and ending it at 31%.

For reference, the year's highest daily chance of a wet day is 46% on September 28, and its lowest chance is 25% on June 25.

Over the course of March in Homer, the chance of a day with only rain increases from 21% to 25%, the chance of a day with mixed snow and rain decreases from 7% to 4%, and the chance of a day with only snow decreases from 6% to 2%.

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 Homer is essentially constant, remaining about 2.1 inches throughout, and rarely exceeding 4.3 inches or falling below 0.3 inches.

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 Homer is decreasing, starting the month at 4.8 inches, when it rarely exceeds 10.3 inches or falls below 0.5 inches, and ending the month at 2.5 inches, when it rarely exceeds 6.1 inches.

Over the course of March in Homer, the length of the day is very rapidly increasing. From the start to the end of the month, the length of the day increases by 2 hours, 42 minutes, implying an average daily increase of 5 minutes, 24 seconds, and weekly increase of 37 minutes, 45 seconds.

The shortest day of the month is March 1, with 10 hours, 34 minutes of daylight and the longest day is March 31, with 13 hours, 15 minutes of daylight.

The latest sunrise of the month in Homer is 8:38 AM on March 9 and the earliest sunrise is 1 hour, 6 minutes earlier at 7:33 AM on March 31.

The earliest sunset is 6:35 PM on March 1 and the latest sunset is 2 hours, 13 minutes later at 8:48 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 4:46 AM and sets 18 hours, 44 minutes later, at 11:30 PM, while on December 21, the shortest day of the year, it rises at 10:05 AM and sets 5 hours, 59 minutes later, at 4:04 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 Homer is essentially constant during March, remaining around 0% throughout.

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 Homer is decreasing during March, decreasing from 13.8 miles per hour to 12.1 miles per hour over the course of the month.

For reference, on January 8, the windiest day of the year, the daily average wind speed is 14.8 miles per hour, while on June 27, the calmest day of the year, the daily average wind speed is 7.4 miles per hour.

The wind direction in Homer during March is predominantly out of the north from March 1 to March 29 and the east from March 29 to March 31.

Homer 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 Homer is essentially constant during March, remaining around 38°F throughout.

The lowest average surface water temperature during March is 38°F on March 8.

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 Homer typically lasts for 4.6 months (142 days), from around May 9 to around September 28, rarely starting before April 17 or after May 27, and rarely ending before September 11 or after October 14.

The month of March in Homer 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 Homer are essentially constant during March, remaining around 0°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 Homer is increasing during March, rising by 1.5 kWh, from 1.6 kWh to 3.1 kWh, over the course of the month.