Petersham, MA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Petersham, a community in Worcester County, Massachusetts.
Overnight
44°F
Mostly Cloudy
Mostly cloudy, with a low around 44. North wind around 6 mph.
7-day forecast for Petersham
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 44°F | Mostly Cloudy | 6 mph N | 0% |
| Saturday | 65°F | Mostly Sunny | 2 to 6 mph NE | 0% |
| Saturday Night | 43°F | Partly Cloudy | 3 mph SE | 0% |
| Sunday | 59°F | Rain Showers | 3 to 8 mph SE | 87% |
| Sunday Night | 50°F | Rain Showers | 3 to 8 mph NE | 80% |
| Monday | 62°F | Slight Chance Rain Showers then Partly Sunny | 7 to 10 mph N | 15% |
| Monday Night | 45°F | Partly Cloudy | 5 to 9 mph NE | 5% |
| Tuesday | 58°F | Partly Sunny | 10 mph NE | 7% |
| Tuesday Night | 44°F | Mostly Cloudy | 6 to 13 mph NE | 3% |
| Wednesday | 58°F | Partly Sunny | 13 to 16 mph NE | 7% |
| Wednesday Night | 44°F | Mostly Cloudy then Slight Chance Rain Showers | 8 to 13 mph NE | 21% |
| Thursday | 56°F | Chance Rain Showers | 14 mph NE | 27% |
| Thursday Night | 46°F | Chance Rain Showers | 9 to 13 mph NE | 32% |
| Friday | 62°F | Chance Rain Showers | 13 mph N | 31% |
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 Sep 19, 2026.