Petersham, MA Weather Forecast & Alerts

Current conditions, 5-day forecast, and active NWS weather alerts for Petersham, MA.

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Current Conditions — Petersham, MA

KEENE/DILLANT (KEEN)

Cloudy

42.8 F
Humidity:76%
Wind Speed:S 8.1 mph
Barometer:30.13 in
Dewpoint:35.6 F
Visibility:10.00 mi
Precip:--
Heat Index:NA
Wind Chill:37.9 F
Apr 22 2026, 10:55 AM EDT
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5-Day Forecast — Petersham, MA

Wednesday

High 44 °F
Chance of Rain Showers
Wednesday
Night
Low 39 °F
Overcast
Thursday

High 57 °F
Mostly Cloudy
Thursday
Night
Low 33 °F
Partly Cloudy
Friday

High 55 °F
Partly Sunny
Friday
Night
Low 32 °F
Mostly Clear
Saturday

High 55 °F
Mostly Cloudy
Saturday
Night
Low 35 °F
Mostly Cloudy
Sunday

High 59 °F
Mostly Cloudy

Detailed Forecast — Petersham, MA

Wednesday
Chance of Rain Showers. High near 44°F. Wind 6 to 10 mph, with gusts as high as 21 mph.
Wednesday Night
Overcast. Low around 39°F. Wind 3 to 5 mph, with gusts as high as 9 mph.
Thursday
Mostly Cloudy. High near 57°F. Wind 6 to 14 mph, with gusts as high as 24 mph.
Thursday Night
Partly Cloudy. Low around 33°F. Wind 5 to 7 mph, with gusts as high as 15 mph.
Friday
Partly Sunny. High near 55°F. Wind 6 to 8 mph, with gusts as high as 15 mph.
Friday Night
Mostly Clear. Low around 32°F. Wind 3 to 6 mph, with gusts as high as 10 mph.
Saturday
Mostly Cloudy. High near 55°F. Wind 5 to 6 mph, with gusts as high as 10 mph.
Saturday Night
Mostly Cloudy. Low around 35°F. Wind 2 to 5 mph, with gusts as high as 9 mph.
Sunday
Mostly Cloudy. High near 59°F. Wind 2 to 7 mph, with gusts as high as 12 mph.
Sunday Night
Mostly Cloudy. Low around 37°F. Wind 3 to 6 mph, with gusts as high as 12 mph.
Monday
Mostly Cloudy. High near 59°F. Wind 3 to 8 mph, with gusts as high as 14 mph.
Monday Night
Slight Chance of Rain. Low around 39°F. Wind 5 to 7 mph, with gusts as high as 14 mph.
Tuesday
Chance of Rain Showers. High near 59°F. Wind 6 to 10 mph, with gusts as high as 18 mph.
MA Radar
Current Radar • MA
Day 1 Outlook • April 22, 2026

Observation History — Petersham, MA

Time Wind
(mph)		 Vis
(mi)		 Weather Precip (in) Temperature (F) Relative
Humidity		 Wind
Chill
(F)		 Heat
Index
(F)		 Pressure
Air Dwpt altimeter
(in)		 sea level
(mb)
10:55 AM EDT S 8.1 10.00 Cloudy -- 42.8 35.6 76% 37.9 NA 30.13 1020.3
10:50 AM EDT S 6.9 10.00 Cloudy -- 42.8 35.6 76% 38.5 NA 30.13 1020.3
10:45 AM EDT S 6.9 10.00 Cloudy -- 42.8 35.6 76% 38.5 NA 30.13 1020.3
10:35 AM EDT S 4.6 10.00 Cloudy -- 42.8 35.6 76% 40.1 NA 30.13 1020.3
10:20 AM EDT 8.1 10.00 Cloudy -- 41.0 35.6 81% 35.8 NA 30.13 1020.3
10:00 AM EDT S 5.7 10.00 Cloudy -- 41.0 35.6 81% 37.0 NA 30.13 1020.3
09:50 AM EDT S 8.1 10.00 Cloudy -- 41.0 33.8 75% 35.8 NA 30.13 1020.3
09:35 AM EDT S 8.1 10.00 Cloudy -- 41.0 33.8 75% 35.8 NA 30.13 1020.3
09:25 AM EDT S 8.1 10.00 Cloudy -- 39.2 33.8 81% 33.6 NA 30.13 1020.3
09:20 AM EDT S 8.1 10.00 Cloudy -- 39.2 33.8 81% 33.6 NA 30.13 1020.3
09:05 AM EDT 8.1 10.00 Cloudy -- 39.2 33.8 81% 33.6 NA 30.13 1020.3
09:00 AM EDT S 6.9 10.00 Cloudy -- 39.2 33.8 81% 34.2 NA 30.14 1020.7
08:50 AM EDT S 8.1 10.00 Cloudy -- 39.2 33.8 81% 33.6 NA 30.14 1020.7
08:40 AM EDT 6.9 10.00 Cloudy -- 39.2 33.8 81% 34.2 NA 30.14 1020.7
08:35 AM EDT S 6.9 10.00 Cloudy -- 39.2 33.8 81% 34.2 NA 30.14 1020.7
08:20 AM EDT S 5.7 10.00 Cloudy -- 39.2 33.8 81% 35.1 NA 30.15 1021.0
08:15 AM EDT 5.7 10.00 Cloudy -- 39.2 33.8 81% 35.1 NA 30.15 1021.0
08:10 AM EDT S 4.6 10.00 Cloudy -- 39.2 33.8 81% 35.8 NA 30.14 1020.7
08:00 AM EDT S 5.7 10.00 Cloudy -- 39.2 32.0 75% 35.1 NA 30.14 1020.7
07:50 AM EDT S 6.9 10.00 Cloudy -- 39.2 32.0 75% 34.2 NA 30.14 1020.7
07:45 AM EDT S 6.9 10.00 Cloudy -- 39.2 32.0 75% 34.2 NA 30.15 1021.0
07:41 AM EDT S 6.9 10.00 Cloudy -- 39.2 32.0 75% 34.2 NA 30.15 1021.0
07:35 AM EDT 4.6 10.00 Cloudy -- 39.2 32.0 75% 35.8 NA 30.15 1021.0
07:30 AM EDT S 8.1 10.00 Cloudy -- 37.4 33.8 87% 31.5 NA 30.15 1021.0

Regional Weather Observation

KEENE/DILLANT (KEEN)

Cloudy
42.8 F

ORANGE (KORE)

Cloudy
42.8 F

CHICOPEE/WESTOVE (KCEF)

Cloudy
43.9 F

WESTFIELD (KBAF)

Cloudy
42.8 F

FITCHBURG (KFIT)

Cloudy
42.8 F

WORCESTER (KORH)

Light Rain
39.2 F
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