Waltham, Massachusetts Weather:
Wednesday, September 23, 2026
Cloudy Weather
Day 63°
Night 46°
Precipitation 25 %
Wind 16 mph
UV Index (0 - 11+) 1
Weather Forecast History
Last Year's Weather on This Day (September 23, 2025)
Partly Sunny with Showers

Day

79°

Night

63°

Wind

8 mph

UV Index

40

Precipitation

55 %