Petersham, MA Weather & Growing Conditions
Today
65°F
Mostly Sunny
Mostly sunny, with a high near 65. Northeast wind 2 to 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 65°F | Mostly Sunny | 2 to 6 mph NE | 0% |
| Tonight | 46°F | Partly Cloudy | 5 mph SE | 0% |
| Sunday | 58°F | Rain Showers | 5 to 8 mph SE | 87% |
| Sunday Night | 48°F | Rain Showers | 6 to 13 mph NE | 79% |
| Monday | 64°F | Partly Sunny | 8 to 13 mph N | 5% |
| Monday Night | 44°F | Mostly Cloudy | 6 to 9 mph N | 0% |
| Tuesday | 60°F | Partly Sunny | 9 mph NE | 2% |
| Tuesday Night | 43°F | Mostly Cloudy | 5 to 10 mph NE | 1% |
| Wednesday | 61°F | Partly Sunny | 10 to 16 mph NE | 3% |
| Wednesday Night | 43°F | Mostly Cloudy then Slight Chance Rain Showers | 8 to 15 mph NE | 20% |
| Thursday | 59°F | Chance Rain Showers | 15 mph NE | 32% |
| Thursday Night | 45°F | Chance Rain Showers | 14 to 18 mph NE | 34% |
| Friday | 61°F | Chance Rain Showers | 15 to 18 mph N | 34% |
| Friday Night | 46°F | Chance Rain Showers | 14 to 18 mph N | 31% |
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 Sep 19, 2026.