Waltham, Massachusetts, United States Climate

Weather: 0.63°C/33.13°F, Wind SW at 0 km/h, 83% Humidity, 0% Chance of rain

United States
(Photo by Andrea Davis on Unsplash)
Contents

Waltham Climate Summary

Located at an elevation of None meters (0 feet) above sea level, Waltham has a Humid continental, no dry season, hot summer climate (Classification: Dfa). The district’s yearly temperature is 12.57ºC (54.63ºF) and it is -0.07% lower than United States’s averages. Waltham typically receives about 18.56 millimeters (0.73 inches) of precipitation and has 34.91 rainy days (9.56% of the time) annually.

CountryUnited States
CityMassachusetts
Longitude-71.2356113
Latitude42.3764852
Attitude/ElevationNonem (0ft)
Local timeFriday 10:49
Annual high temperature15.45ºC (59.81ºF)
Annual low temperature7.57ºC (45.63ºF)
Average annual precip.18.56mm (0.73in)
Warmest monthJuly (30.54ºC / 86.97ºF)
Coldest MonthJanuary (-4.32ºC / 24.22ºF)
Wettest MonthAugust (24.53mm / 0.97in)
Driest MonthSeptember (11.56mm / 0.46in)
Number of days with rainfall (≥ 1.0 mm)34.91 days (9.56%)
Days with no rain330.09000000000003 days (90.44%)
Humidity68.04%

Climate Waltham: Weather By Month

MonthJanFebMarAprMayJunJulAugSepNovOctDecYear
Record high °C (°F)17.0(62.6)21.0(69.8)18.0(64.4)23.0(73.4)32.0(89.6)35.0(95.0)40.0(104.0)37.0(98.6)35.0(95.0)29.0(84.2)23.0(73.4)17.0(62.6)40.0(104.0)
Average high °C (°F)2.28(36.1)4.52(40.14)6.88(44.38)12.02(53.64)20.02(68.04)25.76(78.37)30.54(86.97)28.76(83.77)24.3(75.74)16.61(61.9)9.24(48.63)4.42(39.96)15.45(59.81)
Daily mean °C (°F)-0.19(31.66)1.96(35.53)4.24(39.63)9.3(48.74)16.77(62.19)22.49(72.48)27.12(80.82)25.55(77.99)20.94(69.69)13.76(56.77)6.72(44.1)2.17(35.91)12.57(54.63)
Average low °C (°F)-4.32(24.22)-2.2(28.04)-0.06(31.89)4.29(39.72)10.55(50.99)15.89(60.6)20.57(69.03)19.85(67.73)15.79(60.42)9.37(48.87)2.54(36.57)-1.45(29.39)7.57(45.63)
Record low °C (°F)-20.0(-4.0)-16.0(3.2)-12.0(10.4)-2.0(28.4)2.0(35.6)9.0(48.2)17.0(62.6)12.0(53.6)8.0(46.4)-4.0(24.8)-11.0(12.2)-12.0(10.4)-20.0(-4.0)
Average precipitation mm (inches)15.53(0.61)15.74(0.62)17.42(0.69)21.91(0.86)13.63(0.54)17.82(0.7)21.08(0.83)24.53(0.97)11.56(0.46)20.17(0.79)19.1(0.75)24.25(0.95)18.56(0.73)
Average precipitation days (≥ 1.0 mm)2.183.02.913.363.553.093.643.02.02.822.912.452.91
Average relative humidity (%)67.8568.8169.2765.6365.6965.1365.5867.1868.071.2669.8172.368.04
Mean monthly sunshine hours6.818.598.7910.1612.5413.1413.4812.5410.387.986.626.789.82

Climate Graph

The chart below shows the mean monthly temperature and precipitation of Waltham in recent years.

Waltham

Waltham Temperature by Month

July
27.12°C | 80.82°F
August
25.55°C | 77.99°F
June
22.49°C | 72.48°F
September
20.94°C | 69.69°F
May
16.77°C | 62.19°F
October
13.76°C | 56.77°F
April
9.3°C | 48.74°F
November
6.72°C | 44.1°F
March
4.24°C | 39.63°F
December
2.17°C | 35.91°F
February
1.96°C | 35.53°F
January
-0.19°C | 31.66°F

Historical Data

Summary
  • 2020
  • 2019
  • 2018
  • January
  • February
  • March
  • April
  • May
  • June
  • July
  • August
  • September
  • October
  • November
  • December
TemperatureMaxAverageMin
Max Temperature31.0°C (87.8°F)24.1°C (75.38°F)15.0°C (59.0°F)
Avg Temperature26.0°C (78.8°F)20.8°C (69.44°F)12.0°C (53.6°F)
Min Temperature21.0°C (69.8°F)15.9°C (60.62°F)8.0°C (46.4°F)
Dew PointMaxAverageMin
Dew Point21.0°C (69.8°F)11.8°C (53.24°F)-1.0°C (30.2°F)
PrecipitationMaxAverageMinSum
Precipitation6.2mm | 0.24in0.66mm | 0.03in0.0mm | 0in19.9mm | 0.78in
Snowdepth0.0mm | 0in0.0mm | 0in0.0mm | 0in0.0mm | 0in
WindMaxAverageMin
Wind17.0kmh | 10.56mph10.8kmh | 6.71mph6.0kmh | 3.73mph
Gust Wind28.0kmh | 17.4mph15.23kmh | 9.46mph10.0kmh | 6.21mph
Sea Level PressureMaxAverageMin
Sea Level Pressure6.2mb0.66mb0.0mb
Waltham

Daily Observations

TimeTemperatureDew PointHumidityWind SpeedPressurePrecipitation
September° C | ° F° C | ° F%Kph | MphHg | MbTotal (mm/in)
2020-09-0122 | 71.614 | 57.2709 | 5.5930.18 | 10220.3 | 0.01
2020-09-0221 | 69.818 | 64.48710 | 6.2129.97 | 10151.9 | 0.07
2020-09-0326 | 78.821 | 69.8849 | 5.5929.8 | 10096.2 | 0.24
2020-09-0426 | 78.814 | 57.25813 | 8.0829.8 | 10090.0 | 0.0
2020-09-0521 | 69.88 | 46.44812 | 7.4630.12 | 10200.0 | 0.0
2020-09-0623 | 73.410 | 50.0527 | 4.3530.18 | 10220.0 | 0.0
2020-09-0724 | 75.213 | 55.45813 | 8.0830.12 | 10200.0 | 0.0
2020-09-0826 | 78.817 | 62.6708 | 4.9730.15 | 10210.0 | 0.0
2020-09-0926 | 78.816 | 60.8647 | 4.3530.3 | 10260.0 | 0.0
2020-09-1022 | 71.620 | 68.0917 | 4.3530.21 | 10234.4 | 0.17
2020-09-1121 | 69.817 | 62.6809 | 5.5930.12 | 10200.1 | 0.0
2020-09-1219 | 66.210 | 50.0639 | 5.5930.27 | 10250.0 | 0.0
2020-09-1319 | 66.213 | 55.4708 | 4.9730.15 | 10210.0 | 0.0
2020-09-1422 | 71.612 | 53.66414 | 8.730.03 | 10170.0 | 0.0
2020-09-1518 | 64.45 | 41.0508 | 4.9730.27 | 10250.0 | 0.0
2020-09-1619 | 66.29 | 48.26116 | 9.9430.18 | 10220.0 | 0.0
2020-09-1722 | 71.614 | 57.26912 | 7.4630.0 | 10160.1 | 0.0
2020-09-1815 | 59.05 | 41.05213 | 8.0830.06 | 10180.3 | 0.01
2020-09-1914 | 57.21 | 33.84411 | 6.8430.27 | 10250.0 | 0.0
2020-09-2012 | 53.6-1 | 30.24412 | 7.4630.47 | 10320.0 | 0.0
2020-09-2114 | 57.21 | 33.84510 | 6.2130.5 | 10330.0 | 0.0
2020-09-2215 | 59.01 | 33.84213 | 8.0830.09 | 10190.0 | 0.0
2020-09-2320 | 68.08 | 46.45415 | 9.3229.74 | 10070.0 | 0.0
2020-09-2422 | 71.612 | 53.6639 | 5.5929.94 | 10140.0 | 0.0
2020-09-2523 | 73.413 | 55.4656 | 3.7330.03 | 10170.0 | 0.0
2020-09-2622 | 71.614 | 57.2709 | 5.5930.09 | 10190.0 | 0.0
2020-09-2723 | 73.417 | 62.67712 | 7.4630.0 | 10160.0 | 0.0
2020-09-2824 | 75.218 | 64.47614 | 8.729.94 | 10140.0 | 0.0
2020-09-2923 | 73.418 | 64.48012 | 7.4629.91 | 10130.8 | 0.03
2020-09-3020 | 68.016 | 60.87917 | 10.5629.68 | 10055.8 | 0.23

Waltham 3 Year Historical Weather Data

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