Historical weather data, all-time temperature records, and monthly climate averages for Winchester, MA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Winchester is a true coin flip for weather — there's nearly a 50% chance of rain, but snow is off the table. Historically, the day swings wide: it's hit 77° (1950) and bottomed out at 15° (1954), so the average high of 53° masks a lot of drama.
Winchester plays for keeps on the extremes — 102° in July 2010 and -20° in January 1957 is a 122-degree spread between the all-time high and low. A single September day in 1954 dumped 8.48 inches of rain, and December 1960 buried the town under 19.8 inches of snow in one storm.
Summer peaks in the third week of July with average highs around 84°, while mid-January bottoms out at a frigid 34°. If you're watching for wet weather, December is the riskiest month, with the wettest week of the year landing right in its middle. Spring and fall offer the most temperate conditions, with April and October averaging in the upper 50s to low 60s.