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Current weather in Petersham is clear sky.

Where can I find the hourly weather forecast for Petersham?

This page shows hourly weather forecast for Petersham, including temperature, wind, precipitation, humidity and cloud cover.

Is the weather forecast for Petersham updated regularly?

Weather data for Petersham is updated regularly with the latest available observations and forecasts.

Now · 6:03 PM

Petersham Weather & Hourly Forecast

United States · Massachusetts · 01366

70°F

Sunny

Feels like: 67°F

💧 Humidity 49% 🌡 Pressure 30.09 inHg 💨 Wind 7 mph 👁 Visibility 32.4 mi ☁ Clouds 1% ☀️ UV index 0.4 · Low 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Petersham

Today

7:00 PM

Partly cloudy

65° 💧 None 💨 6 mph H 60%30.12 inHg

10:00 PM

Partly cloudy night

60° 💧 None 💨 3 mph H 74%30.15 inHg

Tomorrow

1:00 AM

Mostly cloudy night

58° 💧 None 💨 2 mph H 78%30.18 inHg

4:00 AM

Overcast night

58° 💧 None 💨 3 mph H 82%30.15 inHg

7:00 AM

Sunny

57° 💧 None 💨 5 mph H 84%30.21 inHg

10:00 AM

Mostly sunny

69° 💧 None 💨 6 mph H 61%30.21 inHg

1:00 PM

Sunny

76° 💧 None 💨 5 mph H 44%30.18 inHg

4:00 PM

Mostly cloudy

76° 💧 None 💨 6 mph H 47%30.18 inHg

7:00 PM

Overcast

69° 💧 0.000 in 💨 3 mph H 72%30.18 inHg

10:00 PM

Overcast night

65° 💧 None 💨 1 mph H 77%30.21 inHg

Wednesday

1:00 AM

Overcast night

63° 💧 None 💨 1 mph H 83%30.21 inHg

4:00 AM

Overcast night

60° 💧 None 💨 3 mph H 95%30.21 inHg

7:00 AM

Overcast

62° 💧 None 💨 4 mph H 93%30.21 inHg

10:00 AM

Mostly cloudy

70° 💧 None 💨 4 mph H 73%30.18 inHg

1:00 PM

Overcast

76° 💧 None 💨 9 mph H 63%30.12 inHg

4:00 PM

Overcast

75° 💧 None 💨 8 mph H 72%30.03 inHg

Today

7:00 PM

Partly cloudy

65° 💧 None 💨 6 mph H 60%30.12 inHg

8:00 PM

Mostly cloudy night

62° 💧 None 💨 5 mph H 67%30.12 inHg

9:00 PM

Partly cloudy night

61° 💧 None 💨 4 mph H 71%30.15 inHg

10:00 PM

Partly cloudy night

60° 💧 None 💨 3 mph H 74%30.15 inHg

11:00 PM

Partly cloudy night

59° 💧 None 💨 4 mph H 75%30.18 inHg

Tomorrow

12:00 AM

Partly cloudy night

58° 💧 None 💨 3 mph H 76%30.18 inHg

1:00 AM

Mostly cloudy night

58° 💧 None 💨 2 mph H 78%30.18 inHg

2:00 AM

Overcast night

57° 💧 None 💨 2 mph H 81%30.18 inHg

3:00 AM

Mostly cloudy night

57° 💧 None 💨 3 mph H 82%30.15 inHg

4:00 AM

Overcast night

58° 💧 None 💨 3 mph H 82%30.15 inHg

5:00 AM

Mostly cloudy night

57° 💧 None 💨 4 mph H 83%30.18 inHg

6:00 AM

Mostly clear night

57° 💧 None 💨 5 mph H 83%30.18 inHg

7:00 AM

Sunny

57° 💧 None 💨 5 mph H 84%30.21 inHg

8:00 AM

Partly cloudy

62° 💧 None 💨 5 mph H 76%30.21 inHg

9:00 AM

Mostly sunny

66° 💧 None 💨 6 mph H 67%30.21 inHg

10:00 AM

Mostly sunny

69° 💧 None 💨 6 mph H 61%30.21 inHg

11:00 AM

Sunny

72° 💧 None 💨 5 mph H 54%30.21 inHg

12:00 PM

Mostly sunny

74° 💧 None 💨 5 mph H 47%30.18 inHg

1:00 PM

Sunny

76° 💧 None 💨 5 mph H 44%30.18 inHg

2:00 PM

Mostly cloudy

78° 💧 None 💨 6 mph H 43%30.15 inHg

3:00 PM

Overcast

77° 💧 None 💨 7 mph H 44%30.15 inHg

4:00 PM

Mostly cloudy

76° 💧 None 💨 6 mph H 47%30.18 inHg

5:00 PM

Mostly cloudy

75° 💧 None 💨 6 mph H 51%30.18 inHg

6:00 PM

Mostly cloudy

73° 💧 None 💨 3 mph H 65%30.18 inHg

7:00 PM

Overcast

69° 💧 0.000 in 💨 3 mph H 72%30.18 inHg

8:00 PM

Overcast night

67° 💧 None 💨 2 mph H 75%30.21 inHg

9:00 PM

Overcast night

66° 💧 None 💨 1 mph H 76%30.21 inHg

10:00 PM

Overcast night

65° 💧 None 💨 1 mph H 77%30.21 inHg

11:00 PM

Overcast night

65° 💧 None 💨 1 mph H 78%30.21 inHg

Wednesday

12:00 AM

Overcast night

64° 💧 None 💨 0 mph H 79%30.21 inHg

1:00 AM

Overcast night

63° 💧 None 💨 1 mph H 83%30.21 inHg

2:00 AM

Overcast night

62° 💧 None 💨 1 mph H 88%30.21 inHg

3:00 AM

Overcast night

61° 💧 None 💨 2 mph H 93%30.21 inHg

4:00 AM

Overcast night

60° 💧 None 💨 3 mph H 95%30.21 inHg

5:00 AM

Overcast night

61° 💧 None 💨 2 mph H 94%30.21 inHg

6:00 AM

Mostly cloudy night

61° 💧 None 💨 2 mph H 93%30.21 inHg

7:00 AM

Overcast

62° 💧 None 💨 4 mph H 93%30.21 inHg

8:00 AM

Overcast

64° 💧 None 💨 3 mph H 85%30.21 inHg

9:00 AM

Overcast

66° 💧 None 💨 3 mph H 80%30.21 inHg

10:00 AM

Mostly cloudy

70° 💧 None 💨 4 mph H 73%30.18 inHg

11:00 AM

Mostly cloudy

74° 💧 None 💨 6 mph H 63%30.18 inHg

12:00 PM

Overcast

76° 💧 None 💨 8 mph H 61%30.15 inHg

1:00 PM

Overcast

76° 💧 None 💨 9 mph H 63%30.12 inHg

2:00 PM

Mostly cloudy

74° 💧 None 💨 8 mph H 69%30.09 inHg

3:00 PM

Overcast

76° 💧 None 💨 9 mph H 69%30.06 inHg

4:00 PM

Overcast

75° 💧 None 💨 8 mph H 72%30.03 inHg

5:00 PM

Overcast

75° 💧 None 💨 10 mph H 72%30.03 inHg

6:00 PM

Partly cloudy

74° 💧 None 💨 10 mph H 75%30.00 inHg

7:00 PM

Mostly cloudy

72° 💧 None 💨 11 mph H 77%29.97 inHg

8:00 PM

Partly cloudy night

71° 💧 None 💨 12 mph H 77%29.97 inHg

9:00 PM

Mostly clear night

70° 💧 None 💨 12 mph H 76%29.97 inHg

10:00 PM

Mostly cloudy night

69° 💧 None 💨 12 mph H 79%29.94 inHg

11:00 PM

Mostly cloudy night

70° 💧 None 💨 14 mph H 80%29.91 inHg

Thursday

12:00 AM

Mostly cloudy night

69° 💧 None 💨 14 mph H 81%29.91 inHg

1:00 AM

Partly cloudy night

69° 💧 0.002 in 💨 13 mph H 84%29.88 inHg

2:00 AM

Mostly cloudy night

68° 💧 None 💨 14 mph H 85%29.88 inHg

3:00 AM

Mostly cloudy night

68° 💧 None 💨 13 mph H 84%29.85 inHg

4:00 AM

Mostly cloudy night

68° 💧 0.003 in 💨 12 mph H 81%29.83 inHg

5:00 AM

Light rain

67° 💧 0.029 in 💨 11 mph H 86%29.85 inHg

6:00 AM

Light rain

65° 💧 0.050 in 💨 11 mph H 95%29.85 inHg

7:00 AM

Overcast

65° 💧 0.002 in 💨 10 mph H 96%29.85 inHg

8:00 AM

Overcast

66° 💧 0.000 in 💨 8 mph H 95%29.85 inHg

11:00 AM

Partly cloudy

72° 💧 None 💨 7 mph H 86%29.85 inHg

2:00 PM

Overcast

80° 💧 None 💨 9 mph H 58%29.80 inHg

5:00 PM

Mostly cloudy

76° 💧 None 💨 7 mph H 65%29.77 inHg

8:00 PM

Overcast night

71° 💧 None 💨 6 mph H 76%29.77 inHg

11:00 PM

Light rain

68° 💧 None 💨 5 mph H 80%29.80 inHg

Friday

2:00 AM

Partly cloudy night

65° 💧 None 💨 7 mph H 86%29.80 inHg

5:00 AM

Mostly clear night

59° 💧 None 💨 6 mph H 94%29.85 inHg

8:00 AM

Sunny

61° 💧 None 💨 5 mph H 85%29.91 inHg

11:00 AM

Partly cloudy

67° 💧 None 💨 9 mph H 53%29.94 inHg

2:00 PM

Sunny

71° 💧 None 💨 9 mph H 44%29.91 inHg

5:00 PM

Sunny

70° 💧 None 💨 7 mph H 47%29.94 inHg

8:00 PM

Clear night

61° 💧 None 💨 3 mph H 72%30.00 inHg

11:00 PM

Clear night

58° 💧 None 💨 1 mph H 77%30.03 inHg

Saturday

2:00 AM

Clear night

54° 💧 None 💨 3 mph H 88%30.09 inHg

5:00 AM

Clear night

52° 💧 None 💨 2 mph H 97%30.12 inHg

8:00 AM

Sunny

57° 💧 None 💨 1 mph H 92%30.18 inHg

11:00 AM

Mostly sunny

67° 💧 None 💨 4 mph H 56%30.18 inHg

2:00 PM

Sunny

71° 💧 None 💨 6 mph H 48%30.12 inHg

5:00 PM

Sunny

71° 💧 None 💨 6 mph H 51%30.12 inHg

8:00 PM

Clear night

63° 💧 None 💨 8 mph H 82%30.15 inHg

11:00 PM

Clear night

60° 💧 None 💨 7 mph H 94%30.18 inHg

Sunday

2:00 AM

Mostly clear night

60° 💧 None 💨 7 mph H 98%30.15 inHg

5:00 AM

Mostly cloudy night

62° 💧 None 💨 8 mph H 93%30.15 inHg

8:00 AM

Light rain

64° 💧 None 💨 7 mph H 88%30.15 inHg

2:00 PM

Overcast

71° 💧 None 💨 10 mph H 71%30.12 inHg

8:00 PM

Clear night

67° 💧 None 💨 8 mph H 88%30.09 inHg

Monday

2:00 AM

Partly cloudy night

64° 💧 None 💨 4 mph H 99%30.12 inHg

8:00 AM

Overcast

63° 💧 None 💨 1 mph H 98%30.21 inHg

2:00 PM

Overcast

75° 💧 None 💨 2 mph H 52%30.18 inHg

8:00 PM

Mostly clear night

66° 💧 None 💨 0 mph H 89%30.21 inHg

Tuesday

2:00 AM

Mostly clear night

64° 💧 None 💨 6 mph H 99%30.24 inHg

8:00 AM

Overcast

64° 💧 None 💨 6 mph H 94%30.30 inHg

2:00 PM

Overcast

73° 💧 None 💨 10 mph H 76%30.21 inHg

8:00 PM

Overcast night

69° 💧 None 💨 10 mph H 90%30.18 inHg

Wednesday

2:00 AM

Overcast night

69° 💧 None 💨 10 mph H 96%30.12 inHg

8:00 AM

Moderate rain

70° 💧 None 💨 9 mph H 99%30.12 inHg

2:00 PM

Moderate rain

66° 💧 None 💨 8 mph H 98%30.12 inHg

8:00 PM

Overcast night

64° 💧 None 💨 10 mph H 84%30.15 inHg

Thursday

2:00 AM

Partly cloudy night

58° 💧 None 💨 8 mph H 83%30.18 inHg

8:00 AM

Sunny

58° 💧 None 💨 6 mph H 79%30.27 inHg

2:00 PM

Mostly sunny

71° 💧 None 💨 5 mph H 44%30.24 inHg

8:00 PM

Mostly clear night

60° 💧 None 💨 6 mph H 67%30.24 inHg

Friday

2:00 AM

Mostly cloudy night

53° 💧 None 💨 3 mph H 89%30.21 inHg

8:00 AM

Overcast

57° 💧 None 💨 3 mph H 93%30.15 inHg

2:00 PM

Overcast

60° 💧 None 💨 7 mph H 87%30.03 inHg

8:00 PM

Mostly clear night

60° 💧 None 💨 7 mph H 86%29.91 inHg

Saturday

2:00 AM

Mostly clear night

59° 💧 None 💨 7 mph H 87%29.85 inHg

8:00 AM

Mostly sunny

55° 💧 None 💨 10 mph H 80%29.91 inHg

2:00 PM

Sunny

63° 💧 None 💨 11 mph H 47%29.91 inHg

8:00 PM

Mostly clear night

53° 💧 None 💨 6 mph H 62%30.00 inHg

Sunday

2:00 AM

Clear night

46° 💧 None 💨 3 mph H 85%30.06 inHg

8:00 AM

Sunny

47° 💧 None 💨 3 mph H 87%30.09 inHg

2:00 PM

Sunny

61° 💧 None 💨 5 mph H 46%30.03 inHg

8:00 PM

Clear night

54° 💧 None 💨 4 mph H 69%30.03 inHg

Monday

2:00 AM

Partly cloudy night

53° 💧 None 💨 5 mph H 88%30.03 inHg

8:00 AM

Partly cloudy

56° 💧 None 💨 3 mph H 87%30.03 inHg

2:00 PM

Light rain

68° 💧 None 💨 9 mph H 49%30.03 inHg

8:00 PM

Mostly clear night

57° 💧 None 💨 7 mph H 72%30.15 inHg

Tuesday

2:00 AM

Clear night

47° 💧 None 💨 6 mph H 81%30.27 inHg

8:00 AM

Sunny

49° 💧 None 💨 4 mph H 73%30.33 inHg

In Petersham and, more broadly, across the state of Massachusetts: As the afternoon winds down, clear skies will persist into the evening, providing a peaceful end to the day. Temperatures are expected to remain mild to warm, hovering between 63 and 78 degrees Fahrenheit. Light northwest winds will continue, generally around 5 to 7 mph, with occasional gusts reaching up to 15 mph. No precipitation is anticipated tonight, so dry conditions will prevail. It should be a comfortable evening with gentle breezes and pleasant temperatures, making it a good time to enjoy outdoor activities or relax indoors. Temperatures will gradually decrease as night progresses, but the weather will remain calm and clear through the evening hours.

15-Day Weather Outlook for Petersham

TomorrowTomorrow

Mostly cloudy 78°/57° 💧 None 💨 7 mph

Wednesday, Sep 9Wed Sep 9

Overcast 76°/60° 💧 None 💨 11 mph

Thursday, Sep 10Thu Sep 10

Light rain 80°/65° 💧 0.099 in 💨 14 mph

Friday, Sep 11Fri Sep 11

Light rain 71°/59° 💧 0.026 in 💨 9 mph

Saturday, Sep 12Sat Sep 12

Mostly sunny 71°/52° 💧 None 💨 6 mph

Sunday, Sep 13Sun Sep 13

Light rain 71°/60° 💧 0.025 in 💨 10 mph

Monday, Sep 14Mon Sep 14

Partly cloudy 75°/63° 💧 None 💨 8 mph

Tuesday, Sep 15Tue Sep 15

Overcast 73°/64° 💧 0.006 in 💨 10 mph

Wednesday, Sep 16Wed Sep 16

Moderate rain 70°/66° 💧 0.437 in 💨 10 mph

Thursday, Sep 17Thu Sep 17

Overcast 71°/58° 💧 0.076 in 💨 10 mph

Friday, Sep 18Fri Sep 18

Overcast 60°/53° 💧 0.035 in 💨 7 mph

Saturday, Sep 19Sat Sep 19

Mostly sunny 63°/55° 💧 0.005 in 💨 11 mph

Sunday, Sep 20Sun Sep 20

Mostly sunny 61°/46° 💧 None 💨 6 mph

Monday, Sep 21Mon Sep 21

Light rain 68°/53° 💧 0.018 in 💨 9 mph

Tuesday, Sep 22Tue Sep 22

Mostly sunny 57°/47° 💧 0.002 in 💨 7 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Petersham

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Petersham

Hourly forecast · Updated every 2 hours

Good

Nearest forecast value 7:00 PM

PM2.5 Fine particles Good 1,9µg/m³

Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.

PM10 Particulate matter Good 2,6µg/m³

Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.

O₃ Ozone Good 56,5µg/m³

Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.

NO₂ Nitrogen dioxide Good 11,4µg/m³

A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.

Air quality is favorable for outdoor activities.

UV & HEALTH

UV, Sun & Health Outlook in Petersham

Maximum daily UV Today, tomorrow and the following day show the maximum UV index forecast for each day.

0–2 Low 3–5 Moderate 6–7 High 8–10 Very high 11+ Extreme

Today UV 6,1High 😊Good

Tomorrow UV 6,2High 🙂Fair

Wednesday UV 5,1Moderate 😷Poor

Thursday UV 6,9High 🙂Fair

Friday UV 5,9Moderate 🙂Fair

Saturday UV 6,0High —Unavailable

Sunday UV 6,0High —Unavailable

Hourly UV index today

7:00 PMUV 0,0

Today's weather health advice Open today's recommendations.

Strong UV exposure

Protect exposed skin with SPF 30+ sunscreen, wear sunglasses, and try to limit direct midday sun.

Good air quality

Air quality is good and outdoor activities can be enjoyed normally.

Comfortable temperature conditions

Temperatures should feel comfortable for most people, with no particular heat or cold precautions needed.

Good conditions for outdoor activities

Outdoor activities can generally be enjoyed normally, with sun protection adjusted to the UV level.

WIND OUTLOOK

Hourly Wind Forecast for Petersham

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · PETERSHAM, MASSACHUSETTS

Tonight's Stargazing & Shooting Stars

Good observing conditions. Best local viewing window: 11:00 PM–12:00 AM.

70/100Best-hour score

BEST TIME TONIGHT 11:00 PM–12:00 AM Astronomical darkness: 8:50 PM–4:43 AM

☁ Cloud cover 42% Real hourly forecast for the best viewing hour.

☾ Moonlight 15% Waning Crescent · Moon below the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 27° high at the best hour.

✦ Estimated visible meteors 0–2/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min41%

UPCOMING METEOR PERIODSStart, peak and end dates · weather should be checked closer to the peak.

SEP 5–SEP 21

September ε-PerseidsStart SEP 5 · Peak SEP 9 · End SEP 21 · ZHR 8 · 6% Moon at peak

ACTIVE NOW

SEP 20–NOV 20

Southern TauridsStart SEP 20 · Peak NOV 5 · End NOV 20 · ZHR 7 · 20% Moon at peak

UPCOMING

OCT 2–NOV 7

OrionidsStart OCT 2 · Peak OCT 21 · End NOV 7 · ZHR 20 · 77% Moon at peak

UPCOMING

OCT 20–DEC 10

Northern TauridsStart OCT 20 · Peak NOV 12 · End DEC 10 · ZHR 5 · 7% Moon at peak

UPCOMING

Experimental local observing estimate. Weather values come from the hourly forecast already used on this page. Moon position and astronomical darkness are calculated locally from time and coordinates. Meteor-shower ZHR describes ideal conditions and is not the number of meteors a person should expect to see locally.

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Forecast data for Petersham were last refreshed today at 6:03 PM. The current forecast period extends through 09/09/2026 at 4:00 PM. Weather, air-quality and UV-index data are provided through WEATHER-INFO.COM. Forecasts are produced automatically from the latest available data and are subject to periodic technical checks. This service is intended for general weather information.