Winchester Weather Forecast
- 68
- 87
Rain Showers
- 59
- 83
Mostly Sunny
- 65
- 85
Partly Sunny
- 69
- 85
Rain Showers
- 67
- 87
Rain Showers Likely
- 65
- 86
Partly Sunny
Today 18 Jul Southeast Middlesex
Partly sunny. Patchy smoke. Showers likely with a slight chance of Thunderstorms in the afternoon. Some Thunderstorms may produce heavy rainfall in the afternoon. Highs in the upper 80s. Temperature falling into the upper 70s in the afternoon. Southwest Winds 15 to 20 Mph. Gusts up to 25 Mph, increasing to 35 Mph in the afternoon. Chance of rain 70 percent.
Tonight 18 Jul Southeast Middlesex
Showers with a chance of Thunderstorms in the Evening, then Showers likely after midnight. Some Thunderstorms may produce heavy rainfall in the evening. Locally heavy rainfall possible in the evening. Humid with Lows in the upper 60s. Southwest Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain 90 percent.
Winchester Temperature Statistics
July Temperature
Laurence G Hanscom Field Airport (8.1 miles)
Lowest 12 July, 2026
57 °FAverage July
76.5 °FHighest 2 July, 2026
98.1 °F
Climate (2021–2026)
Laurence G Hanscom Field Airport (8.1 miles)
Average Low 2021–2026
41.3 °FAverage 2021–2026
51.7 °FAverage High 2021–2026
61.7 °F