Petersham, MA Weather & Growing Conditions
Today
81°F
Sunny
Sunny, with a high near 81. West wind around 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 81°F | Sunny | 6 mph W | 0% |
| Tonight | 59°F | Partly Cloudy | 0 to 5 mph SW | 0% |
| Wednesday | 80°F | Partly Sunny | 0 to 6 mph SW | 1% |
| Wednesday Night | 64°F | Partly Cloudy | 2 to 6 mph SW | 10% |
| Thursday | 83°F | Mostly Sunny then Chance Showers And Thunderstorms | 2 to 8 mph SW | 40% |
| Thursday Night | 69°F | Chance Showers And Thunderstorms | 7 mph SW | 54% |
| Friday | 85°F | Mostly Sunny then Chance Rain Showers | 3 to 8 mph SW | 27% |
| Friday Night | 67°F | Chance Showers And Thunderstorms | 1 to 6 mph W | 36% |
| Saturday | 83°F | Partly Sunny then Chance Rain Showers | 2 to 7 mph W | 27% |
| Saturday Night | 66°F | Chance Rain Showers then Partly Cloudy | 1 to 5 mph SW | 36% |
| Sunday | 84°F | Mostly Sunny | 2 to 8 mph SW | 12% |
| Sunday Night | 66°F | Slight Chance Rain Showers then Mostly Clear | 2 to 6 mph SW | 15% |
| Monday | 85°F | Sunny | 2 to 10 mph SW | 11% |
| Monday Night | 65°F | Partly Cloudy | 6 to 9 mph W | 13% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Petersham, MA
Last spring frost
May 4
First fall frost
Oct 8
Growing season
157 days
Hardiness zone
5b
Explore more for Petersham, MA: full frost dates · planting calendar · Massachusetts frost dates
Climate data from the nearest NOAA station, Orange Muni Ap, Ma (7.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.