Average Weather in Arlington Massachusetts, United States
In Arlington, the summers are warm, the winters are freezing and wet, and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 20°F to 82°F and is rarely below 6°F or above 91°F.
Based on the tourism score, the best time of year to visit Arlington for warm-weather activities is from mid June to mid September.
The warm season lasts for 3.3 months, from June 4 to September 15, with an average daily high temperature above 73°F. The hottest day of the year is July 21, with an average high of 82°F and low of 65°F.
The cold season lasts for 3.4 months, from December 3 to March 14, with an average daily high temperature below 45°F. The coldest day of the year is January 29, with an average low of 20°F and high of 35°F.
Average High and Low Temperature
Average Hourly Temperature
Odessa, Ukraine (4,662 miles away); Nizhneye Kazanishche, Russia (5,424 miles); and Shiojiri, Japan (6,717 miles) are the far-away foreign places with temperatures most similar to Arlington (view comparison).
In Arlington, 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 Arlington begins around June 26 and lasts for 4.2 months, ending around November 2. On September 6, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 64% of the time, and overcast or mostly cloudy 36% of the time.
The cloudier part of the year begins around November 2 and lasts for 7.8 months, ending around June 26. On February 28, the cloudiest day of the year, the sky is overcast or mostly cloudy 54% of the time, and clear, mostly clear, or partly cloudy 46% of the time.
Cloud Cover Categories
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Arlington varies throughout the year.
The wetter season lasts 9.2 months, from March 19 to December 24, with a greater than 28% chance of a given day being a wet day. The chance of a wet day peaks at 34% on May 29.
The drier season lasts 2.8 months, from December 24 to March 19. The smallest chance of a wet day is 23% on January 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 34% on May 29.
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. Arlington experiences significant seasonal variation in monthly rainfall.
Rain falls throughout the year in Arlington. The most rain falls during the 31 days centered around October 22, with an average total accumulation of 3.9 inches.
The least rain falls around January 24, with an average total accumulation of 1.9 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. Arlington experiences significant seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 5.2 months, from November 6 to April 14, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around January 27, with an average total liquid-equivalent accumulation of 1.1 inches.
The snowless period of the year lasts for 6.8 months, from April 14 to November 6. The least snow falls around July 28, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in Arlington varies significantly over the course of the year. In 2018, the shortest day is December 21, with 9 hours, 4 minutes of daylight; the longest day is June 21, with 15 hours, 18 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:06 AM on June 14, and the latest sunrise is 2 hours, 14 minutes later at 7:20 AM on November 3. The earliest sunset is at 4:11 PM on December 8, and the latest sunset is 4 hours, 14 minutes later at 8:25 PM on June 27.
Daylight saving time (DST) is observed in Arlington 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
Arlington experiences significant seasonal variation in the perceived humidity.
The muggier period of the year lasts for 3.4 months, from June 10 to September 21, during which time the comfort level is muggy, oppressive, or miserable at least 10% of the time. The muggiest day of the year is July 30, with muggy conditions 40% of the time.
The least muggy day of the year is December 18, when muggy conditions are essentially unheard of.
Humidity Comfort Levels
The average hourly wind speed in Arlington experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 5.8 months, from October 28 to April 22, with average wind speeds of more than 6.4 miles per hour. The windiest day of the year is February 20, with an average hourly wind speed of 8.4 miles per hour.
The calmer time of year lasts for 6.2 months, from April 22 to October 28. The calmest day of the year is July 31, with an average hourly wind speed of 4.4 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Arlington is from the west throughout the year.
Arlington 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 3.0 months, from June 25 to September 26, with an average temperature above 60°F. The day of the year with the warmest water is August 5, with an average temperature of 66°F.
The time of year with cooler water lasts for 3.8 months, from December 28 to April 22, with an average temperature below 44°F. The day of the year with the coolest water is March 2, with an average temperature of 38°F.
Average Water Temperature
Best Time of Year to Visit
To characterize how pleasant the weather is in Arlington 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 Arlington for general outdoor tourist activities is from mid June to mid September, with a peak score in the last 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 Arlington 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 Arlington typically lasts for 6.5 months (199 days), from around April 10 to around October 27, rarely starting before March 23 or after April 27, and rarely ending before October 7 or after November 14.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in Arlington should appear around April 23, only rarely appearing before April 7 or after May 4.
Growing Degree Days
The brighter period of the year lasts for 3.5 months, from May 6 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 3.2 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 Arlington are 42.415 deg latitude, -71.156 deg longitude, and 82 ft elevation.
The topography within 2 miles of Arlington contains only modest variations in elevation, with a maximum elevation change of 367 feet and an average elevation above sea level of 95 feet. Within 10 miles also contains only modest variations in elevation (453 feet). Within 50 miles contains only modest variations in elevation (2,264 feet).
The area within 2 miles of Arlington is covered by artificial surfaces (90%), within 10 miles by artificial surfaces (76%) and trees (15%), and within 50 miles by trees (45%) and water (28%).
This report illustrates the typical weather in Arlington, 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 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Arlington.
For each station, the records are corrected for the elevation difference between that station and Arlington 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 Arlington is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Arlington and a given station.
The stations contributing to this reconstruction are: Lawrence G Hanscom Field (40%, 12 kilometers, northwest); Logan International Airport (35%, 13 kilometers, southeast); East Milton (12%, 23 kilometers, south); and Beverly Municipal Airport (13%, 27 kilometers, northeast).
Time zones for aiports and weather stations are provided by AskGeo.com .