Snowfall Precipitation July High Low Annual Rainfall US Avg: Annual Snowfall US Avg: 25". Precipitation Days US Avg: Sunny Days US Avg: Select Map Options. Reviews for Massachusetts 72 Reviews. Massachusetts is home to some Read More. Agree Disagree Well over 50 colleges and universities within a mile radius so the entire region is always Rain falls throughout the year in Boston. The month with the most rain in Boston is October , with an average rainfall of 3.
The month with the least rain in Boston is January , with an average rainfall of 2. As with rainfall, we consider the snowfall accumulated over a sliding day period centered around each day of the year. Boston experiences significant seasonal variation in monthly snowfall. The snowy period of the year lasts for 5.
The month with the most snow in Boston is January , with an average snowfall of 8. The snowless period of the year lasts for 7. The least snow falls around August 4 , with an average total accumulation of 0. The length of the day in Boston varies significantly over the course of the year. In , the shortest day is December 21 , with 9 hours, 5 minutes of daylight; the longest day is June 20 , with 15 hours, 17 minutes of daylight. The earliest sunrise is at AM on June 15 , and the latest sunrise is 2 hours, 17 minutes later at AM on November 6.
The earliest sunset is at PM on December 8 , and the latest sunset is 4 hours, 14 minutes later at PM on June Daylight saving time DST is observed in Boston during , starting in the spring on March 14 , lasting 7.
The figure below presents a compact representation of key lunar data for 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. 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 muggier period of the year lasts for 3. The month with the most muggy days in Boston is July , with The least muggy day of the year is February 23 , when muggy conditions are essentially unheard of. 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 Boston experiences significant seasonal variation over the course of the year. The windier part of the year lasts for 5. The windiest month of the year in Boston is February , with an average hourly wind speed of 9.
The calmer time of year lasts for 6. The calmest month of the year in Boston is July , with an average hourly wind speed of 5. The predominant average hourly wind direction in Boston is from the west throughout the year.
Boston is located near a large body of water e. This section reports on the wide-area average surface temperature of that water. The average water temperature experiences significant seasonal variation over the course of the year.
The time of year with warmer water lasts for 3. The time of year with cooler water lasts for 3. To characterize how pleasant the weather is in Boston throughout the year, we compute two travel scores. Based on this score, the best time of year to visit Boston for general outdoor tourist activities is from late June to mid September , with a peak score in the last week of August. Based on this score, the best time of year to visit Boston for hot-weather activities is from early July to mid August , with a peak score in the last week of July.
For each hour between AM and PM of each day in the analysis period to , independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.
Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.
Our precipitation score , which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.
The growing season in Boston typically lasts for 7. 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.
Based on growing degree days alone, the first spring blooms in Boston should appear around April 23 , only rarely appearing before April 7 or after May 5. 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.
Spring is a welcomed season as temperatures start to rise and the growing season begins. But, don't forget a jacket and an umbrella, as the growing season also means moisture is in the air. Check out our list of Spring activities. Looking for something?
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