Average Weather in Gloucester Massachusetts, United States
In Gloucester, the summers are warm; the winters are very cold, wet, and windy; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 23°F to 79°F and is rarely below 10°F or above 88°F.
Based on the tourism score, the best time of year to visit Gloucester for warm-weather activities is from late June to mid September.
The warm season lasts for 3.2 months, from June 8 to September 15, with an average daily high temperature above 71°F. The hottest day of the year is July 21, with an average high of 79°F and low of 64°F.
The cold season lasts for 3.4 months, from December 4 to March 18, with an average daily high temperature below 45°F. The coldest day of the year is January 30, with an average low of 23°F and high of 37°F.
Average High and Low Temperature
Average Hourly Temperature
Krasnokamenka, Ukraine (4,851 miles away); Çaykara, Turkey (5,252 miles); and Sergokala, Russia (5,430 miles) are the far-away foreign places with temperatures most similar to Gloucester (view comparison).
In Gloucester, the average percentage of the sky covered by clouds experiences mild seasonal variation over the course of the year.
The clearer part of the year in Gloucester begins around June 27 and lasts for 4.4 months, ending around November 7. On September 6, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 63% of the time, and overcast or mostly cloudy 37% of the time.
The cloudier part of the year begins around November 7 and lasts for 7.6 months, ending around June 27. On May 24, the cloudiest day of the year, the sky is overcast or mostly cloudy 56% of the time, and clear, mostly clear, or partly cloudy 44% of the time.
Cloud Cover Categories
Gloucester does not experience significant seasonal variation in the frequency of wet days (i.e., those with greater than 0.04 inches of liquid or liquid-equivalent precipitation). The frequency ranges from 24% to 32%, with an average value of 29%.
Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 32% on May 24.
Daily Chance of Precipitation
To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Gloucester experiences some seasonal variation in monthly rainfall.
Rain falls throughout the year in Gloucester. The most rain falls during the 31 days centered around October 23, with an average total accumulation of 4.1 inches.
The least rain falls around January 24, with an average total accumulation of 2.3 inches.
Average Monthly Rainfall
As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Gloucester experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 4.9 months, from November 15 to April 11, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around February 5, with an average total liquid-equivalent accumulation of 0.9 inches.
The snowless period of the year lasts for 7.1 months, from April 11 to November 15. The least snow falls around July 21, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in Gloucester varies significantly over the course of the year. In 2018, the shortest day is December 21, with 9 hours, 3 minutes of daylight; the longest day is June 21, with 15 hours, 19 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:04 AM on June 15, and the latest sunrise is 2 hours, 15 minutes later at 7:18 AM on November 3. The earliest sunset is at 4:09 PM on December 9, and the latest sunset is 4 hours, 15 minutes later at 8:24 PM on June 27.
Daylight saving time (DST) is observed in Gloucester during 2018, starting in the spring on March 11, lasting 7.8 months, and ending in the fall on November 4.
Sunrise & Sunset with Twilight and Daylight Saving Time
Gloucester experiences significant seasonal variation in the perceived humidity.
The muggier period of the year lasts for 3.2 months, from June 15 to September 20, during which time the comfort level is muggy, oppressive, or miserable at least 10% of the time. The muggiest day of the year is August 2, with muggy conditions 38% of the time.
The least muggy day of the year is March 2, when muggy conditions are essentially unheard of.
Humidity Comfort Levels
The average hourly wind speed in Gloucester experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 6.0 months, from October 14 to April 15, with average wind speeds of more than 9.7 miles per hour. The windiest day of the year is January 31, with an average hourly wind speed of 12.9 miles per hour.
The calmer time of year lasts for 6.0 months, from April 15 to October 14. The calmest day of the year is July 31, with an average hourly wind speed of 6.4 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Gloucester varies throughout the year.
The wind is most often from the south for 2.3 months, from April 23 to July 2 and for 1.9 months, from July 25 to September 22, with a peak percentage of 37% on July 1. The wind is most often from the west for 3.3 weeks, from July 2 to July 25 and for 7.0 months, from September 22 to April 23, with a peak percentage of 39% on July 8.
Gloucester 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 water temperature experiences significant seasonal variation over the course of the year.
The time of year with warmer water lasts for 2.9 months, from June 27 to September 25, with an average temperature above 60°F. The day of the year with the warmest water is August 7, with an average temperature of 65°F.
The time of year with cooler water lasts for 4.0 months, from December 28 to April 26, with an average temperature below 44°F. The day of the year with the coolest water is March 8, with an average temperature of 39°F.
Average Water Temperature
Best Time of Year to Visit
To characterize how pleasant the weather is in Gloucester throughout the year, we compute two travel scores.
The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best time of year to visit Gloucester for general outdoor tourist activities is from late June to mid September, with a peak score in the third week of August.
The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Gloucester for hot-weather activities is from early July to mid August, with a peak score in the last week of July.
The growing season in Gloucester typically lasts for 7.0 months (213 days), from around April 8 to around November 7, rarely starting before March 22 or after April 24, and rarely ending before October 20 or after November 24.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in Gloucester should appear around May 2, only rarely appearing before April 15 or after May 14.
Growing Degree Days
The average daily incident shortwave solar energy experiences extreme seasonal variation over the course of the year.
The brighter period of the year lasts for 3.4 months, from May 8 to August 21, with an average daily incident shortwave energy per square meter above 5.8 kWh. The brightest day of the year is June 30, with an average of 6.8 kWh.
The darker period of the year lasts for 3.3 months, from November 3 to February 11, with an average daily incident shortwave energy per square meter below 2.6 kWh. The darkest day of the year is December 24, with an average of 1.6 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Gloucester are 42.616 deg latitude, -70.662 deg longitude, and 20 ft elevation.
The topography within 2 miles of Gloucester contains only modest variations in elevation, with a maximum elevation change of 203 feet and an average elevation above sea level of 46 feet. Within 10 miles also contains only modest variations in elevation (249 feet). Within 50 miles contains only modest variations in elevation (1,142 feet).
The area within 2 miles of Gloucester is covered by artificial surfaces (45%), water (25%), and trees (24%), within 10 miles by water (74%) and trees (13%), and within 50 miles by water (57%) and trees (23%).
This report illustrates the typical weather in Gloucester, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
There are 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Gloucester.
For each station, the records are corrected for the elevation difference between that station and Gloucester according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
The estimated value at Gloucester is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Gloucester and a given station.
Time zones for aiports and weather stations are provided by AskGeo.com .