Freeze Warning
Ends in 45 min
When
Until 9 AM EDT this morning.
Where
In New Jersey, Morris, Somerset, and Hunterdon Counties. In Pennsylvania, Berks, Lehigh, Upper Bucks, Western Chester, and Western Montgomery Counties.
Issued for this forecast zone · National Weather Service Mount Holly NJ
What, impacts and precautionsHide details
What
Sub-freezing temperatures as low as 31.
Impacts
Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.
Precautionary actions
Take steps now to protect tender plants from the cold.
Areas: Morris; Hunterdon; Somerset; Berks; Lehigh; Western Chester; Western Montgomery; Upper Bucks
See it on weather.gov (opens in a new tab)

Observed 7:50 AM EDT at KSMQ

Griggstown, NJ weather

Freeze Warning. 30°−1° and sunny now.

Forecasts agree

Now 30°−1°

Sunny

Wind: Calm; Light through 8 PM
Dew point: 28°−2°; Dry · up to 37°3° by 11 AM (comfortable)
Humidity: 93%; Air 30°−1°, dew point 28°−2° · frost likely
UV index: 0Low; Moderate 11 AM–4 PM · peak 4
Air quality: 51Moderate; Main pollutant: PM2.5 (fine particles)
Pressure: 30.53 inHg1034 hPa; Rising slowly · +0.03 inHg+1.0 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

Above 50°10° today by 11 AM
High 63°17° today at 4 PM
Below 50°10° tonight after 8 PM

This morningUp to 52°11° by 11 AM · Partly cloudy
This afternoonUp to 63°17° by 4 PM · Clear
TonightDown to 34°1° by 4 AM · Clear
Tomorrow morningUp to 57°14° by 11 AM · Clear
Tomorrow afternoonUp to 66°19° by 4 PM · Clear
Tomorrow nightDown to 36°2° by 5 AM · Clear

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 8a	Sunny	33°1° (likely 28°−2° to 40°4°)	33°1°	0%	0 mph0 km/h, gusts 5 mph7 km/h	92%	32%	0
Sat 9a	Sunny	39°4° (likely 37°3° to 44°7°)	39°4°	0%	0 mph0 km/h, gusts 4 mph7 km/h	85%	34%	1
Sat 10a	Sunny	48°9° (likely 46°8° to 50°10°)	48°9°	0%	0 mph0 km/h, gusts 6 mph9 km/h	63%	37%	2
Sat 11a	Sunny	52°11° (likely 51°11° to 55°13°)	52°11°	0%	0 mph0 km/h, gusts 4 mph6 km/h	56%	38%	3
Sat 12p	Sunny	56°13° (likely 55°13° to 58°14°)	56°13°	0%	0 mph0 km/h, gusts 3 mph4 km/h	47%	29%	4
Sat 1p	Sunny	59°15° (likely 58°14° to 60°16°)	59°15°	0%	0 mph0 km/h, gusts 2 mph3 km/h	40%	19%	4
Sat 2p	Mostly sunny	61°16° (likely 59°15° to 61°16°)	61°16°	0%	0 mph0 km/h, gusts 2 mph4 km/h	36%	19%	4
Sat 3p	Mostly sunny	62°17° (likely 60°16° to 62°17°)	62°17°	0%	0 mph0 km/h, gusts 2 mph4 km/h	35%	15%	3
Sat 4p	Mostly sunny	63°17° (likely 60°16° to 63°17°)	63°17°	0%	0 mph0 km/h, gusts 2 mph4 km/h	32%	7%	2
Sat 5p	Sunny	61°16° (likely 59°15° to 61°16°)	61°16°	0%	0 mph0 km/h, gusts 2 mph3 km/h	35%	7%	1
Sat 6p	Clear	58°14° (likely 54°12° to 58°14°)	58°14°	0%	0 mph0 km/h, gusts 3 mph4 km/h	44%	0%	0
Sat 7p	Clear	53°12° (likely 50°10° to 53°12°)	53°12°	0%	0 mph0 km/h, gusts 4 mph6 km/h	54%	0%	0
Sat 8p	Clear	48°9° (likely 47°8° to 51°11°)	48°9°	0%	0 mph0 km/h, gusts 4 mph6 km/h	63%	0%	0
Sat 9p	Clear	45°7° (likely 44°7° to 49°9°)	45°7°	0%	0 mph0 km/h, gusts 4 mph6 km/h	70%	6%	0
Sat 10p	Clear	43°6° (likely 42°6° to 48°9°)	43°6°	0%	0 mph0 km/h, gusts 5 mph7 km/h	73%	2%	0
Sat 11p	Clear	40°4° (likely 40°4° to 46°8°)	40°4°	0%	0 mph0 km/h, gusts 4 mph7 km/h	79%	3%	0
Sun 12a	Clear	39°4° (likely 39°4° to 45°7°)	39°4°	0%	0 mph0 km/h, gusts 4 mph6 km/h	82%	6%	0
Sun 1a	Clear	38°3° (likely 38°3° to 43°6°)	38°3°	0%	0 mph0 km/h, gusts 5 mph9 km/h	85%	0%	0
Sun 2a	Clear	37°3° (likely 37°3° to 42°6°)	37°3°	0%	0 mph0 km/h, gusts 5 mph7 km/h	89%	0%	0
Sun 3a	Clear	35°2° (likely 35°2° to 41°5°)	35°2°	0%	0 mph0 km/h, gusts 4 mph6 km/h	92%	0%	0
Sun 4a	Clear	34°1° (likely 34°1° to 40°4°)	34°1°	0%	0 mph0 km/h, gusts 4 mph7 km/h	92%	0%	0
Sun 5a	Clear	34°1° (likely 34°1° to 40°4°)	34°1°	0%	0 mph0 km/h, gusts 4 mph7 km/h	92%	0%	0
Sun 6a	Clear	33°1° (likely 33°1° to 39°4°)	33°1°	0%	0 mph0 km/h, gusts 4 mph7 km/h	92%	1%	0
Sun 7a	Sunny	33°1° (likely 32°0° to 39°4°)	33°1°	0%	0 mph0 km/h, gusts 4 mph7 km/h	92%	11%	0
Sun 8a	Sunny	34°1° (likely 31°−1° to 39°4°)	34°1°	0%	0 mph0 km/h, gusts 5 mph8 km/h	92%	12%	0
Sun 9a	Sunny	41°5° (likely 36°2° to 44°7°)	41°5°	0%	0 mph0 km/h, gusts 5 mph8 km/h	82%	0%	1
Sun 10a	Sunny	51°11° (likely 48°9° to 51°11°)	51°11°	0%	0 mph0 km/h, gusts 6 mph9 km/h	61%	0%	2
Sun 11a	Sunny	57°14° (likely 55°13° to 58°14°)	57°14°	0%	0 mph0 km/h, gusts 6 mph10 km/h	49%	0%	3
Sun 12p	Sunny	60°16° (likely 58°14° to 61°16°)	60°16°	0%	0 mph0 km/h, gusts 6 mph9 km/h	42%	0%	4
Sun 1p	Sunny	64°18° (likely 61°16° to 64°18°)	64°18°	0%	0 mph0 km/h, gusts 5 mph9 km/h	35%	0%	4
Sun 2p	Sunny	65°18° (likely 62°17° to 65°18°)	65°18°	0%	0 mph0 km/h, gusts 5 mph8 km/h	33%	0%	4
Sun 3p	Sunny	65°18° (likely 63°17° to 66°19°)	65°18°	0%	0 mph0 km/h, gusts 5 mph8 km/h	33%	0%	3
Sun 4p	Sunny	66°19° (likely 63°17° to 66°19°)	66°19°	0%	0 mph0 km/h, gusts 6 mph9 km/h	32%	0%	2
Sun 5p	Sunny	65°18° (likely 61°16° to 65°18°)	65°18°	0%	0 mph0 km/h, gusts 5 mph8 km/h	34%	0%	1
Sun 6p	Clear	60°16° (likely 56°13° to 60°16°)	60°16°	0%	0 mph0 km/h, gusts 4 mph6 km/h	44%	0%	0
Sun 7p	Clear	55°13° (likely 51°11° to 55°13°)	55°13°	0%	0 mph0 km/h, gusts 6 mph9 km/h	55%	0%	0
Sun 8p	Clear	49°9° (likely 48°9° to 53°12°)	49°9°	0%	0 mph0 km/h, gusts 6 mph10 km/h	68%	0%	0
Sun 9p	Clear	46°8° (likely 46°8° to 51°11°)	46°8°	0%	0 mph0 km/h, gusts 6 mph10 km/h	76%	0%	0
Sun 10p	Clear	44°7° (likely 44°7° to 48°9°)	44°7°	0%	0 mph0 km/h, gusts 6 mph9 km/h	79%	0%	0
Sun 11p	Clear	42°6° (likely 42°6° to 47°8°)	42°6°	0%	0 mph0 km/h, gusts 5 mph9 km/h	82%	0%	0
Mon 12a	Clear	41°5° (likely 40°4° to 46°8°)	41°5°	0%	0 mph0 km/h, gusts 5 mph9 km/h	85%	0%	0
Mon 1a	Clear	40°4° (likely 37°3° to 45°7°)	40°4°	0%	0 mph0 km/h, gusts 6 mph10 km/h	89%	0%	0
Mon 2a	Clear	39°4° (likely 36°2° to 45°7°)	39°4°	0%	0 mph0 km/h, gusts 6 mph10 km/h	92%	0%	0
Mon 3a	Clear	38°3° (likely 34°1° to 45°7°)	38°3°	0%	0 mph0 km/h, gusts 6 mph9 km/h	92%	0%	0
Mon 4a	Clear	37°3° (likely 33°1° to 44°7°)	37°3°	0%	0 mph0 km/h, gusts 6 mph10 km/h	92%	1%	0
Mon 5a	Clear	36°2° (likely 31°−1° to 44°7°)	36°2°	0%	0 mph0 km/h, gusts 6 mph10 km/h	92%	1%	0
Mon 6a	Clear	35°2° (likely 30°−1° to 43°6°)	35°2°	0%	0 mph0 km/h, gusts 6 mph9 km/h	92%	1%	0
Mon 7a	Mostly sunny	35°2° (likely 32°0° to 43°6°)	35°2°	0%	0 mph0 km/h, gusts 5 mph8 km/h	92%	8%	0

Days ahead

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

Today, Oct 24. Mostly sunny. High 64°18°, low 32°0°. Typical 63°17° / 41°5°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 33°1°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 63°17°
  Dry
3. Evening
  6 PM–midnight
  Clear, 48°9°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 34°1°
  Dry
Official NWS forecast
Today: Areas of frost before 10am. Sunny, with a high near 64. North wind around 0 mph.
Tonight: Areas of frost after 10pm. Clear, with a low around 32. Northwest wind around 0 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
60°16°–64°18°
Low, likely
27°−3°–38°3°
Typical high / low
63°17° / 41°5°
Wind
7 mph12 km/h
UV peak
4
Tomorrow, Oct 25. Sunny. High 67°19°, low 34°1°. Typical 63°17° / 41°5°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 34°1°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 49°9°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 36°2°
  Dry
Official NWS forecast
Day: Areas of frost before 9am. Sunny, with a high near 67. Northwest wind around 0 mph.
Night: Clear, with a low around 34. West wind around 0 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
63°17°–67°19°
Low, likely
31°−1°–39°4°
Typical high / low
63°17° / 41°5°
Wind
7 mph10 km/h
UV peak
4
Monday, Oct 26. Sunny. High 70°21°, low 44°7°. Typical 63°17° / 40°4°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 39°4°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 54°12°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 49°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 70. West wind 0 to 5 mph.
Night: Clear, with a low around 44.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
67°19°–70°21°
Low, likely
31°−1°–44°7°
Typical high / low
63°17° / 40°4°
Wind
8 mph13 km/h, gusts 17 mph28 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 62°17°, low 35°2°. Typical 62°17° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 46°8°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 61°16°
  Dry
3. Evening
  6 PM–midnight
  Clear, 49°9°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 37°3°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 62.
Night: Mostly clear, with a low around 35.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
58°14°–64°18°
Low, likely
35°2°–48°9°
Typical high / low
62°17° / 40°4°
Wind
8 mph13 km/h, gusts 25 mph40 km/h
UV peak
4
Wednesday, Oct 28. Partly sunny. High 62°17°, low 40°4°. Typical 62°17° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 37°3°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 60°15°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 51°10°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 43°6°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 62.
Night: Partly cloudy, with a low around 40.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
58°14°–62°17°
Low, likely
30°−1°–41°5°
Typical high / low
62°17° / 40°4°
Wind
8 mph13 km/h
UV peak
3
Thursday, Oct 29. Partly sunny. High 68°20°, low 46°8°. Typical 62°17° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 42°6°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 55°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 47°8°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 68.
Night: Mostly clear, with a low around 46.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
64°18°–68°20°
Low, likely
39°4°–46°8°
Typical high / low
62°17° / 40°4°
Wind
8 mph12 km/h, gusts 31 mph49 km/h
UV peak
4
Friday, Oct 30. Mostly sunny. High 71°22°, low 44°7°. Typical 61°16° / 39°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 71°22°
  Dry
3. Evening
  6 PM–midnight
  Clear, 58°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 48°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 71.
Night: Mostly clear, with a low around 44.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
70°21°–73°23°
Low, likely
42°6°–49°9°
Typical high / low
61°16° / 39°4°
Wind
12 mph19 km/h, gusts 23 mph37 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 68°20°, low 48°9°. Typical 61°16° / 39°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 48°9°
  Dry
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°–73°23°
Low, likely
42°6°–53°12°
Typical high / low
61°16° / 39°4°
Wind
11 mph18 km/h, gusts 26 mph42 km/h
UV peak
3
Sunday, Nov 1. Cloudy. High 66°19°, low 48°9°. Typical 61°16° / 39°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Mostly sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 57°14°
  20% chance
4. Overnight
  midnight–6 AM
  Partly cloudy, 54°12°
  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
56°13°–71°22°
Low, likely
42°6°–52°11°
Typical high / low
61°16° / 39°4°
Wind
9 mph14 km/h, gusts 22 mph35 km/h
UV peak
4
Monday, Nov 2. Cloudy. High 66°19°, low 54°12°. Typical 60°16° / 38°3°. Rain 0.04 in1 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 56°13°
  30% chance
2. Afternoon
  noon–6 PM
  Cloudy, 67°20°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 59°15°
  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
53°12°–73°23°
Low, likely
46°8°–59°15°
Typical high / low
60°16° / 38°3°
Wind
10 mph16 km/h, gusts 17 mph28 km/h
UV peak
2

10 days15 days30 days

The outlook

Today
Dry, high 64°, low 32°.
Tomorrow
Dry, high 67°, low 34°, warming up.
Monday
Dry, high 70°, low 44°, warming up.
Rest of week
Mostly dry, highs 62–71°.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (PHI) (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

Millstone River at Blackwells Mills

2.7 mi

Below flood stage

Level: 1.9 ft
Flow: 160 cfs

Forecast peak 1.9 ft Sat 8 AM

Reading from Sat 6:15 AM · NWS gauge page

Raritan River at Manville

8.0 mi

Below flood stage

Level: 4.3 ft
Flow: 371 cfs

Forecast peak 4.2 ft Sat 8 AM

Reading from Sat 6:15 AM · NWS gauge page

Raritan River at Bound Brook

8.1 mi

Below flood stage

Level: 16.9 ft
Flow: 251 cfs

Forecast peak 16.9 ft Sat 8 AM

Reading from Sat 6:15 AM · NWS gauge page

Millstone River at Griggstown

1.0 mi

Below flood stage

Level: 3.5 ft

Reading from Sat 5:45 AM · NWS gauge page

For your home

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

Heating this week

About 65% less heating than a typical week.

This week 34Typical 97

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 25
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 20 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 28°F). Indoor air will run dry too — a humidifier keeping indoor relative humidity in the 30–50% range is more comfortable and cuts static shocks, without going so high it fogs cold windows.

Open the windows?

Today, 2:00 PM–5:00 PM

Good stretch to open the windows.

Is this typical?

New Brunswick 3 SE · official normals 1991–2020 · records 1893–2026

Oct 24, today vs a typical year

Today’s expected high is about typical for the date.

Last 7 days vs normal

On average 1° colder than normal (daily mean temperature).

−10°−6°SunOct 18
−5°−3°MonOct 19
+2°+1°TueOct 20
+5°+3°WedOct 21
±0°ThuOct 22
+4°+2°FriOct 23
—SatOct 24

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

Sun & moon

Sun

Daylight: 10 h 46 min; Losing 2 min 25 s a day; shortest Dec 21, 1 h 29 min less
Golden hour: 5:27–6:22 PM; Morning 7:02–7:57 AM
Blue hour: 6:22–6:33 PM; Morning 6:51–7:02 AM; first light 6:51 AM

Stars tonight? Fair

Clear 6:33 PM–6:52 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

96% lit · growing

Today: sets 5:30 AM · rises 5:01 PM
Full moon: Oct 26
New moon: Nov 9

Looking northwest from Griggstown. The highest point on the skyline is about 2,000 ft, 40 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

1 active weather alert

Freeze Warning

Griggstown, NJ weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Millstone River at Blackwells Mills

Raritan River at Manville

Raritan River at Bound Brook

Millstone River at Griggstown

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