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Waltham, MA Weather Tomorrow

Stay one step ahead with tomorrow's weather in Waltham and a reliable 5 day forecast including precipitation potential, daytime and nighttime forecasts, temperature highs and lows in Fahrenheit and Celsius, sunrise and sunset times, cloud cover, wind chill, wind speed, and wind direction across the Waltham area and around Middlesex county, Massachusetts.
Updated: Thu Oct 8th 2026 3:30 AM EDT
Waltham, MA Weather – 10-8 – Sunny
71° / 54°
Sunny
Waltham may see a sunny day, with daytime highs of 71°F and overnight lows near 54°F. There's a very small chance of rainfall, only about 4%. Wind will be moderate, blowing around 14mph on average and gusts of 33.6mph at 5 AM. The humidity will be on the higher side, averaging about 62%, the maximum being 86% at 7 AM and 32% being its lowest at 2 PM. Barometric pressure is its highest of 29.94inHg at 11 PM, a lowest point of 29.76inHg at 6 AM with an avg 29.81inHg.
Waltham, MA Weather – 10-9 – Sunny
67° / 48°

Weather Tomorrow

Sunny
A sunny day is in the forecast for Waltham, with a high of 67°F and a low of 48°F. There's a very small chance of rainfall, only about 3%. Wind will be moderate, blowing around 15mph on average and gusts of 28mph at 12 AM. Humidity levels should be comfortable, sitting around 57% on average, the maximum being 76% at 7 AM and 35% being its lowest at 1 PM. Barometric pressure is its highest of 30.23inHg at 11 PM, a lowest point of 29.94inHg at 12 AM with an avg 30.06inHg.
Waltham, MA Weather – 10-10 – Sunny
65° / 45°
Sunny
Waltham could see a sunny day with daytime highs of 65°F and nighttime lows near 45°F. There's a very small chance of rainfall, only about 6%. Winds will be light at 8mph and gusts of 20.4mph at 12 AM. Humidity levels should be comfortable, sitting around 54% on average, the maximum being 75% at 7 AM and 31% being its lowest at 2 PM. Barometric pressure is its highest of 30.49inHg at 10 PM, a lowest point of 30.25inHg at 12 AM with an avg 30.39inHg.
Waltham, MA Weather – 10-11 – Overcast
73° / 48°
Overcast
In Waltham, skies will be overcast with highs near 73°F and lows around 48°F. There's a moderate 49% chance of rainfall with an estimated 0.03in. Wind will be moderate, blowing around 11mph on average and gusts of 23.3mph at 8 PM. The humidity will be on the higher side, averaging about 65%, the maximum being 88% at 11 PM and 44% being its lowest at 1 PM. Barometric pressure is its highest of 30.49inHg at 12 AM, a lowest point of 30.11inHg at 11 PM with an avg 30.33inHg.
Waltham, MA Weather – 10-12 – Mist
60° / 56°
Mist
Waltham could see mist with daytime highs of 60°F and nighttime lows near 56°F. The chance of rain is 95% with an estimated 0.71in. Winds will be light at 10mph and gusts of 21.8mph at 7 AM. High humidity with average of 97% is anticipated, the maximum being 99% at 6 AM and 95% being its lowest at 11 PM. Barometric pressure is its highest of 30.1inHg at 12 AM, a lowest point of 29.74inHg at 7 PM with an avg 29.84inHg.
Waltham, MA Weather – 10-13 – Mist
77° / 53°
Mist
Highs will reach 77°F with lows near 53°F in Waltham, where mist is. There might be light rainfall having a 19% chance with an estimated 0in. Wind will be moderate, blowing around 15mph on average and gusts of 32.3mph at 11 PM. High humidity with average of 81% is anticipated, the maximum being 98% at 5 AM and 45% being its lowest at 2 PM. Barometric pressure is its highest of 29.75inHg at 12 AM, a lowest point of 29.39inHg at 8 PM with an avg 29.57inHg.
Waltham, MA Weather Forecast - 10 Day Detailed

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