Petersham, MA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Petersham, a community in Worcester County, Massachusetts.
This Afternoon
66°F
Mostly Cloudy
Mostly cloudy. High near 66, with temperatures falling to around 59 in the afternoon. Southwest wind around 6 mph.
7-day forecast for Petersham
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 66°F | Mostly Cloudy | 6 mph SW | 9% |
| Tonight | 46°F | Partly Cloudy | 5 mph SW | 3% |
| Wednesday | 70°F | Mostly Sunny | 5 to 10 mph SW | 4% |
| Wednesday Night | 52°F | Partly Cloudy then Patchy Fog | 8 mph SW | 2% |
| Thursday | 66°F | Chance Light Rain | 8 to 13 mph SW | 46% |
| Thursday Night | 59°F | Light Rain Likely | 2 to 9 mph SW | 69% |
| Friday | 65°F | Light Rain | 5 mph S | 77% |
| Friday Night | 53°F | Rain | 5 mph NE | 78% |
| Saturday | 60°F | Light Rain Likely | 7 mph NW | 64% |
| Saturday Night | 41°F | Chance Light Rain | 6 mph NW | 41% |
| Sunday | 55°F | Slight Chance Light Rain then Mostly Sunny | 6 to 9 mph W | 24% |
| Sunday Night | 34°F | Partly Cloudy | 6 mph W | 9% |
| Monday | 53°F | Slight Chance Light Rain | 5 to 14 mph W | 22% |
| Monday Night | 33°F | Slight Chance Light Rain | 7 to 10 mph W | 21% |
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 Nov 3, 2026.