Petersham, MA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Petersham, a community in Worcester County, Massachusetts.
Today
80°F
Sunny
Sunny, with a high near 80. West wind around 6 mph.
7-day forecast for Petersham
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 80°F | Sunny | 6 mph W | 0% |
| Tonight | 58°F | Partly Cloudy | 1 to 5 mph SW | 0% |
| Wednesday | 79°F | Partly Sunny | 0 to 6 mph W | 1% |
| Wednesday Night | 63°F | Partly Cloudy | 2 to 6 mph SW | 9% |
| Thursday | 82°F | Mostly Sunny then Chance Showers And Thunderstorms | 2 to 8 mph SW | 40% |
| Thursday Night | 68°F | Chance Showers And Thunderstorms | 3 to 7 mph SW | 54% |
| Friday | 84°F | Mostly Sunny then Chance Rain Showers | 5 to 8 mph SW | 26% |
| Friday Night | 66°F | Chance Rain Showers | 1 to 7 mph W | 34% |
| Saturday | 82°F | Partly Sunny then Chance Rain Showers | 2 to 7 mph W | 27% |
| Saturday Night | 65°F | Chance Rain Showers then Partly Cloudy | 1 to 5 mph SW | 36% |
| Sunday | 83°F | Mostly Sunny | 2 to 8 mph W | 12% |
| Sunday Night | 66°F | Slight Chance Rain Showers then Mostly Clear | 6 mph SW | 15% |
| Monday | 83°F | Sunny | 3 to 12 mph SW | 10% |
| Monday Night | 64°F | Mostly Clear | 6 to 9 mph W | 12% |
Forecast source: National Weather Service (api.weather.gov) for Petersham (42.491, -72.187). Updated through the day.
Growing snapshot for Petersham
Last spring frost
May 4
First fall frost
Oct 8
Growing season
157 days
Hardiness zone
6a
More local growing data for Petersham: nearby ZIP 01366 weather · frost dates · planting calendar · Massachusetts frost dates
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Climate data from the nearest NOAA station, Orange Muni Ap, Ma (7.8 mi from Petersham). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.