Observed 10:45 PM EDT at KFIT

Groton, MA weather

Clear and 36°2°.

Mostly agree

Now 36°2°

Clear

Wind: 3 mph5 km/h; From the north-northwest. Light through 11 AM
Dew point: 30°−1°; Dry, static shocks likely
UV tomorrow: 4Moderate; Moderate 11 AM–4 PM · peak 4
Air quality: 48Good; Main pollutant: PM2.5 (fine particles)
Pressure: 30.53 inHg1034 hPa; Steady over the last 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

Hard freeze tonight 2–9 AM (low 27°−3°)
Above 50°10° tomorrow by 10 AM
High 67°19° tomorrow at 2 PM
Drops 13°7° tomorrow night 6–9 PM (56°13° → 43°6°)
Below 50°10° tomorrow night after 8 PM

TonightDown to 28°−2° by 5 AM · freezing, low 28°−2° · Clear
Tomorrow morningUp to 57°14° by 11 AM · freezing, low 27°−3° · Clear
Tomorrow afternoonUp to 67°19° by 2 PM · Clear
Tomorrow nightDown to 33°1° by 4 AM · Clear
Monday morningUp to 59°15° by 11 AM · freezing, low 32°0° · Partly cloudy
Monday afternoonUp to 69°21° by 3 PM · Clear
Monday nightDown to 52°11° by 10 PM · Partly cloudy

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 11p	Clear	37°3° (likely 37°3° to 40°4°)	37°3°	0%	2 mph3 km/h from W, gusts 5 mph7 km/h	79%	0%	0
Sun 12a	Clear	36°2° (likely 36°2° to 38°3°)	36°2°	0%	2 mph3 km/h from W, gusts 3 mph6 km/h	79%	0%	0
Sun 1a	Clear	34°1° (likely 34°1° to 38°3°)	34°1°	0%	2 mph3 km/h from W, gusts 4 mph7 km/h	89%	0%	0
Sun 2a	Clear	32°0° (likely 32°0° to 38°3°)	29°−2°	0%	3 mph5 km/h from W, gusts 5 mph9 km/h	96%	0%	0
Sun 3a	Clear	30°−1° (likely 30°−1° to 38°3°)	26°−3°	0%	3 mph5 km/h from W, gusts 6 mph9 km/h	100%	0%	0
Sun 4a	Clear	29°−2° (likely 29°−2° to 38°3°)	29°−2°	0%	2 mph3 km/h from W, gusts 5 mph8 km/h	100%	0%	0
Sun 5a	Clear	28°−2° (likely 28°−2° to 39°4°)	28°−2°	0%	2 mph3 km/h from W, gusts 5 mph8 km/h	100%	0%	0
Sun 6a	Clear	27°−3° (likely 27°−3° to 37°3°)	27°−3°	0%	2 mph3 km/h from W, gusts 5 mph8 km/h	100%	0%	0
Sun 7a	Sunny	28°−2° (likely 28°−2° to 37°3°)	28°−2°	0%	2 mph3 km/h from W, gusts 4 mph6 km/h	100%	5%	0
Sun 8a	Sunny	30°−1° (likely 30°−1° to 38°3°)	30°−1°	0%	1 mph2 km/h from W, gusts 3 mph6 km/h	96%	10%	0
Sun 9a	Sunny	39°4° (likely 39°4° to 43°6°)	39°4°	0%	1 mph2 km/h from W, gusts 4 mph6 km/h	73%	0%	1
Sun 10a	Sunny	50°10° (likely 50°10° to 53°12°)	50°10°	0%	1 mph2 km/h from W, gusts 3 mph5 km/h	52%	0%	2
Sun 11a	Sunny	57°14° (likely 55°13° to 60°16°)	57°14°	0%	1 mph2 km/h from W, gusts 3 mph5 km/h	43%	0%	3
Sun 12p	Sunny	62°17° (likely 60°16° to 63°17°)	62°17°	0%	2 mph3 km/h from SW, gusts 5 mph7 km/h	36%	0%	4
Sun 1p	Sunny	64°18° (likely 62°17° to 65°18°)	64°18°	0%	3 mph5 km/h from SW, gusts 7 mph11 km/h	33%	0%	4
Sun 2p	Sunny	67°19° (likely 65°18° to 67°19°)	67°19°	0%	5 mph8 km/h from SW, gusts 8 mph12 km/h	29%	0%	4
Sun 3p	Sunny	67°19° (likely 65°18° to 67°19°)	67°19°	0%	5 mph8 km/h from SW, gusts 9 mph14 km/h	29%	0%	3
Sun 4p	Sunny	66°19° (likely 63°17° to 66°19°)	66°19°	0%	5 mph8 km/h from SW, gusts 9 mph15 km/h	32%	0%	2
Sun 5p	Sunny	62°17° (likely 59°15° to 63°17°)	62°17°	0%	3 mph5 km/h from SW, gusts 9 mph15 km/h	38%	0%	1
Sun 6p	Clear	56°13° (likely 52°11° to 56°13°)	56°13°	0%	3 mph5 km/h from SW, gusts 9 mph14 km/h	47%	0%	0
Sun 7p	Clear	51°11° (likely 47°8° to 53°12°)	51°11°	0%	3 mph5 km/h from SW, gusts 9 mph14 km/h	54%	0%	0
Sun 8p	Clear	43°6° (likely 43°6° to 49°9°)	43°6°	0%	2 mph3 km/h from SW, gusts 8 mph13 km/h	73%	0%	0
Sun 9p	Clear	41°5° (likely 41°5° to 47°8°)	41°5°	0%	2 mph3 km/h from SW, gusts 9 mph14 km/h	79%	0%	0
Sun 10p	Clear	38°3° (likely 38°3° to 46°8°)	38°3°	0%	2 mph3 km/h from SW, gusts 8 mph13 km/h	89%	0%	0
Sun 11p	Clear	37°3° (likely 37°3° to 45°7°)	37°3°	0%	2 mph3 km/h from SW, gusts 8 mph13 km/h	96%	0%	0
Mon 12a	Clear	36°2° (likely 36°2° to 44°7°)	36°2°	0%	2 mph3 km/h from SW, gusts 8 mph13 km/h	96%	0%	0
Mon 1a	Clear	36°2° (likely 36°2° to 43°6°)	36°2°	0%	2 mph3 km/h from SW, gusts 8 mph13 km/h	96%	0%	0
Mon 2a	Clear	35°2° (likely 35°2° to 43°6°)	35°2°	0%	2 mph3 km/h from W, gusts 9 mph14 km/h	100%	0%	0
Mon 3a	Clear	35°2° (likely 35°2° to 42°6°)	35°2°	0%	2 mph3 km/h from W, gusts 9 mph14 km/h	92%	3%	0
Mon 4a	Mostly clear	33°1° (likely 33°1° to 42°6°)	33°1°	0%	2 mph3 km/h from W, gusts 9 mph14 km/h	100%	10%	0
Mon 5a	Clear	33°1° (likely 33°1° to 42°6°)	33°1°	0%	2 mph3 km/h from W, gusts 8 mph14 km/h	100%	3%	0
Mon 6a	Clear	33°1° (likely 33°1° to 41°5°)	33°1°	0%	2 mph3 km/h from W, gusts 8 mph12 km/h	100%	14%	0
Mon 7a	Sunny	32°0° (likely 32°0° to 41°5°)	32°0°	0%	2 mph3 km/h from W, gusts 7 mph11 km/h	100%	3%	0
Mon 8a	Sunny	34°1° (likely 34°1° to 43°6°)	34°1°	0%	2 mph3 km/h from W, gusts 7 mph11 km/h	100%	24%	0
Mon 9a	Sunny	43°6° (likely 43°6° to 48°9°)	41°5°	0%	3 mph5 km/h from W, gusts 7 mph10 km/h	79%	18%	1
Mon 10a	Mostly sunny	53°12° (likely 53°12° to 57°14°)	53°12°	0%	3 mph5 km/h from W, gusts 8 mph13 km/h	69%	52%	2
Mon 11a	Mostly sunny	59°15° (likely 59°15° to 62°17°)	59°15°	0%	3 mph5 km/h from W, gusts 13 mph20 km/h	57%	53%	3
Mon 12p	Mostly sunny	64°18° (likely 61°16° to 65°18°)	64°18°	0%	5 mph8 km/h from W, gusts 14 mph23 km/h	50%	25%	4
Mon 1p	Sunny	67°19° (likely 65°18° to 68°20°)	67°19°	0%	6 mph10 km/h from W, gusts 15 mph24 km/h	47%	4%	4
Mon 2p	Sunny	68°20° (likely 67°19° to 69°21°)	68°20°	0%	6 mph10 km/h from W, gusts 16 mph25 km/h	45%	7%	4
Mon 3p	Sunny	69°21° (likely 67°19° to 70°21°)	69°21°	0%	6 mph10 km/h from W, gusts 15 mph24 km/h	45%	15%	3
Mon 4p	Sunny	69°21° (likely 66°19° to 69°21°)	69°21°	0%	5 mph8 km/h from W, gusts 15 mph24 km/h	47%	15%	2
Mon 5p	Sunny	67°19° (likely 64°18° to 67°19°)	67°19°	0%	3 mph5 km/h from W, gusts 12 mph19 km/h	52%	24%	1
Mon 6p	Clear	65°18° (likely 59°15° to 65°18°)	65°18°	0%	3 mph5 km/h from W, gusts 10 mph16 km/h	56%	21%	0
Mon 7p	Mostly clear	61°16° (likely 56°13° to 61°16°)	61°16°	0%	3 mph5 km/h from W, gusts 10 mph16 km/h	65%	25%	0
Mon 8p	Mostly clear	57°14° (likely 54°12° to 57°14°)	57°14°	0%	3 mph5 km/h from W, gusts 8 mph13 km/h	75%	52%	0
Mon 9p	Mostly clear	54°12° (likely 52°11° to 56°13°)	54°12°	0%	3 mph5 km/h from NW, gusts 8 mph13 km/h	80%	37%	0
Mon 10p	Mostly clear	52°11° (likely 52°11° to 55°13°)	52°11°	0%	3 mph5 km/h from NW, gusts 10 mph16 km/h	83%	21%	0

Days ahead

Shaded: typical range for these dates (1991–2020)

Today, Oct 24. Partly sunny. High 61°16°, low 26°−3°. Typical 59°15° / 37°3°. Dry. Mostly agree.
1. Overnight
  midnight–6 AM
  Clear, 28°−2°
  Dry
Official NWS forecast
Tonight: Areas of frost after midnight. Clear, with a low around 26. West wind around 3 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
60°16°–63°17°
Low, likely
23°−5°–30°−1°
Typical high / low
59°15° / 37°3°
Wind
5 mph9 km/h
UV peak
4
Tomorrow, Oct 25. Sunny. High 68°20°, low 31°−1°. Typical 59°15° / 36°2°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 30°−1°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 67°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 43°6°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 33°1°
  Dry
Official NWS forecast
Day: Areas of frost before 9am. Sunny. High near 68, with temperatures falling to around 62 in the afternoon. West wind 1 to 5 mph.
Night: Patchy frost after midnight. Clear, with a low around 31. Southwest wind around 3 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
65°18°–68°20°
Low, likely
31°−1°–37°3°
Typical high / low
59°15° / 36°2°
Wind
7 mph10 km/h, gusts 12 mph19 km/h
UV peak
4
Monday, Oct 26. Mostly sunny. High 69°21°, low 38°3°. Typical 58°14° / 36°2°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 34°1°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 69°21°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 43°6°
  Dry
Official NWS forecast
Day: Areas of frost before 9am. Sunny, with a high near 69. West wind 2 to 6 mph.
Night: Mostly clear, with a low around 38. Northwest wind around 5 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
67°19°–70°21°
Low, likely
35°2°–41°5°
Typical high / low
58°14° / 36°2°
Wind
9 mph14 km/h, gusts 18 mph29 km/h
UV peak
4
Tuesday, Oct 27. Sunny. High 55°13°, low 26°−3°. Typical 58°14° / 36°2°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 41°5°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 52°11°
  Dry
3. Evening
  6 PM–midnight
  Clear, 39°4°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 29°−2°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 55. North wind 2 to 6 mph.
Night: Clear, with a low around 26. North wind around 2 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
52°11°–55°13°
Low, likely
26°−3°–37°3°
Typical high / low
58°14° / 36°2°
Wind
9 mph14 km/h, gusts 25 mph40 km/h
UV peak
4
Wednesday, Oct 28. Mostly sunny. High 55°13°, low 33°1°. Typical 58°14° / 35°2°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 29°−1°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 54°12°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 41°5°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 40°4°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 55. East wind around 2 mph.
Night: Mostly clear, with a low around 33. South wind around 2 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
52°11°–56°13°
Low, likely
23°−5°–33°1°
Typical high / low
58°14° / 35°2°
Wind
7 mph11 km/h, gusts 13 mph21 km/h
UV peak
4
Thursday, Oct 29. Mostly sunny. High 64°18°, low 46°8°. Typical 57°14° / 35°2°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 44°7°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 54°12°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 51°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 64. Southwest wind 2 to 8 mph.
Night: Mostly clear, with a low around 46. Southwest wind around 6 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
62°17°–68°20°
Low, likely
38°3°–46°8°
Typical high / low
57°14° / 35°2°
Wind
11 mph18 km/h, gusts 35 mph56 km/h
UV peak
4
Friday, Oct 30. Mostly sunny. High 68°20°, low 42°6°. Typical 57°14° / 35°2°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Partly sunny, 51°11°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 70°21°
  Dry
3. Evening
  6 PM–midnight
  Clear, 54°12°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 43°6°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 68. West wind around 6 mph.
Night: Mostly clear, with a low around 42. Northwest wind around 3 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
67°19°–74°23°
Low, likely
42°6°–51°11°
Typical high / low
57°14° / 35°2°
Wind
11 mph17 km/h, gusts 28 mph44 km/h
UV peak
3
Saturday, Oct 31. Partly sunny. High 65°18°, low 43°6°. Typical 56°13° / 35°2°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 43°6°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 50°10°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 45°7°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 65. North wind 1 to 5 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
57°14°–67°19°
Low, likely
40°4°–47°8°
Typical high / low
56°13° / 35°2°
Wind
6 mph10 km/h, gusts 16 mph26 km/h
UV peak
3
Sunday, Nov 1. Cloudy. High 65°18°, low 46°8°. Typical 56°13° / 34°1°. Rain 0.02 in0.5 mm, 20% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 58°14°
  30% chance
4. Overnight
  midnight–6 AM
  Drizzle, 59°15°
  30% chance · 0.02 in0.6 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
62°17°–69°21°
Low, likely
41°5°–48°9°
Typical high / low
56°13° / 34°1°
Wind
10 mph15 km/h, gusts 29 mph47 km/h
UV peak
3
Monday, Nov 2. Drizzle. High 66°19°, low 56°13°. Typical 56°13° / 34°1°. Rain 0.11 in2.8 mm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 60°16°
  30% chance · 0.05 in1.2 mm
2. Afternoon
  noon–6 PM
  Drizzle, 66°19°
  30% chance · 0.02 in0.6 mm
3. Evening
  6 PM–midnight
  Drizzle, 60°16°
  30% chance
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
60°16°–71°22°
Low, likely
51°11°–64°18°
Typical high / low
56°13° / 34°1°
Wind
14 mph23 km/h, gusts 37 mph59 km/h

10 days15 days30 days

The outlook

Today
Dry, high 61°, low 26°.
Tomorrow
Dry, high 68°, low 31°, warming up.
Monday
Dry, high 69°, low 38°.
Rest of week
Mostly dry, highs 55–68°.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (BOX) (opens in a new tab)

What changed since yesterday

No meaningful changes from yesterday’s forecast.

Radar

Radar data: NOAA MRMS, rendered by forecast.blue

Radar loads when scrolled into view

Full-screen radar

Rivers

NOAA river gauges within 25 mi

Nashua River at East Pepperell

3.9 mi

Below flood stage

Level: 1.5 ft
Flow: 250 cfs

Forecast peak 1.5 ft Sun 2 AM

Reading from Sat 9:45 PM · NWS gauge page

Squannacook River at West Groton

5.0 mi

Below flood stage

Level: 1.9 ft
Flow: 34 cfs

Forecast peak 1.9 ft Sun 2 AM

Reading from Sat 9 PM · NWS gauge page

North Nashua River at Fitchburg

12 mi

Below flood stage

Level: 2.6 ft
Flow: 48 cfs

Forecast peak 2.6 ft Sun 2 AM

Reading from Sat 9:30 PM · NWS gauge page

Merrimack River at Nashua

12 mi

Below flood stage

Level: 4.7 ft
Flow: 2,920 cfs

Forecast peak 4.6 ft Sun 2 AM

Reading from Sat 9:15 PM · NWS gauge page

For your home

What this week’s weather means for heating, cooling, pipes and fresh air.

Heating this week

About 72% less heating than a typical week.

This week 35Typical 127

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 24
h below 17°F: 0
h below 5°F: 0

47, 17 and 5°F are the test points heat pumps are rated at. About 18 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 30°F).

Open the windows?

Sun, 12:00 PM–5:00 PM

Good stretch to open the windows.

Is this typical?

LOWELL · official normals 1991–2020 · records 1885–2026

Oct 24, today vs a typical year

Today’s expected high is 2°1° warmer than typical.

Last 7 days vs normal

On average 0° colder than normal (daily mean temperature).

−6°−4°MonOct 19
−1°TueOct 20
+4°+2°WedOct 21
+3°+2°ThuOct 22
+4°+2°FriOct 23
−4°−2°SatOct 24
—SunOct 25

Groton weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 40 min; Losing 2 min 44 s a day; shortest Dec 21, 1 h 37 min less
Golden hour: 5:10–6:07 PM; Morning 6:52–7:49 AM
Blue hour: 6:07–6:18 PM; Morning 6:41–6:52 AM; first light 6:41 AM

Stars tonight? Fair

Clear 11:15 PM–6:42 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

98% lit · growing

Today: sets 5:19 AM · rises 4:47 PM
Full moon: Oct 26
New moon: Nov 9

Looking northwest from Groton. The highest point on the skyline is about 3,800 ft, 18 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

Groton, MA weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Nashua River at East Pepperell

Squannacook River at West Groton

North Nashua River at Fitchburg

Merrimack River at Nashua

For your home

Heating this week

Heat-pump hours, next 7 days

Comfort

Open the windows?

Is this typical?

Oct 24, today vs a typical year

Last 7 days vs normal

Sun & moon

Sun

Stars tonight? Fair

Moon