TODAY FEB21
TEMPERATURE
HUMIDITY18
PRESSURE30.35
WIND COND.240 8.1
  • 4326Sat
  • 5230Sun
  • 5337Mon
  • 4837Tue40%40%
  • 4637Wed40%70%
daynightWeather update from Bedford, Hanscom Field at
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Waltham Average Temperature

In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
January19°F38°F27°F5.0"
February16°F37°F25°F4.6"
March24°F45°F34°F7.3"
April36°F60°F47°F9.2"
May45°F68°F56°F7.8"
June56°F81°F67°F3.2"
July61°F85°F72°F4.2"
August61°F86°F72°F4.0"
September53°F79°F65°F3.1"
October45°F65°F54°F9.5"
November31°F53°F41°F4.7"
December20°F38°F29°F5.5"

Did you know?

  • The highest monthly average temperature in Waltham for August is 72 degrees.
  • The lowest monthly average temperature in Waltham for February is 25 degrees.
  • The most monthly precipitation in Waltham occurs in October with 9.5 inches.
  • The air quality index in Waltham is 5% better than the national average.
  • The pollution index in Waltham is 49% worse than the national average.

Compare Waltham, MA Weather To Other Cities

Waltham air quality index & pollution index

In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
IndexWalthamMassachusettsNational
Air quality index474050
Pollution index7,556,32012,377,8395,066,862

Waltham air quality information

MeasurementTotal
Days measured365
Days with good air quality223
Days with moderate air quality137
Days w/ poor A.Q. for sensitive groups5
Days with unhealthy air quality

Waltham air quality information

PollutantTotal
Arsenic0.010%
Benzene0.070%
Carbon Tetrachloride0.040%
Lead0.010%
Mercury0.040%

Average monthly Waltham temperature with heat index

Waltham monthly precipitation with daily maximum

Waltham monthly snow depth with daily maximum

Waltham monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Hopkinton, MA2,7943824%
Cordaville, MA2,8473824%
Framingham, MA70,7433824%
Littleton Common, MA3,0023824%
Maynard, MA10,5263824%
Waltham, MA62,699476%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
South Jordan, UT62,751476%
Greenville, SC62,7764020%
Bethesda, MD62,608492%
Bowling Green, KY62,8243824%
Castro Valley, CA62,8254314%
Waltham, MA62,699476%
Source: The Waltham, MA weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.
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