Best year time to visit Waltham

General weather information about Waltham

Average annual temperature is 11.7 °C

Absolute maximum temperature: 37.2 °C

Absolute minimum temperature: -20.7 °C

Number of sunny days: 191 days

Number of rainy days: 158 days

Number of snow days: 16 days

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* Weather data for Waltham United States is based on climate observations for 2026 year

Waltham air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)11.814.321.425.931.633.534.937.233.928.419.714.7
Average daytime temperature (°C)3.26.18.917.623.829.028.928.825.217.610.27.0
Average temperature (°C)-0.90.53.310.317.222.323.322.919.812.74.93.1
Average night temperature (°C)-3.7-3.7-0.84.311.015.818.017.815.38.70.70.3
Absolute minimum temperature (°C)-20.7-18.4-12.3-2.01.58.913.811.29.1-2.3-10.6-8.2

Waltham monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)10.011.012.013.014.015.015.014.013.011.010.09.0
Daylight mean duration (h)9.610.611.913.314.515.114.813.812.511.19.99.2
Daylight minimum duration (h)9.010.011.012.013.014.014.013.011.010.09.09.0
Sunshine mean duration (h)3.57.66.89.410.812.412.210.78.97.27.24.4
Precipitation (mm)6370118859218201681191273066
Sunny days121615162119131612112317
Rainy days9101514101118151819613
Snow days1021000000111

Waltham - weather forecast by months

Waltham weather in januaryWaltham weather in februaryWaltham weather in marchWaltham weather in aprilWaltham weather in mayWaltham weather in juneWaltham weather in julyWaltham weather in augustWaltham weather in septemberWaltham weather in octoberWaltham weather in novemberWaltham weather in december

Best time to visit Waltham:

The best time to visit Waltham during the most sunny months:

  • May — 10.8(h)
  • June — 12.4(h)
  • July — 12.2(h)
  • August — 10.7(h)

The largest precipitation sum in Waltham is at

  • March — 118(mm)
  • July — 201(mm)
  • September — 119(mm)
  • October — 127(mm)

    • Weather forecast in the closest to Waltham admin centers

    Weather forecast in the closest towns to Waltham

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    Frequently asked questions

    When is the best time to visit Waltham?
    The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit Waltham.
    What is the weather like in Waltham?
    See average temperature, rainfall and daylight hours for Waltham by month in the table above.
    How many sunny days does Waltham have?
    The monthly weather statistics above show sunshine and rainfall patterns for Waltham throughout the year.