Frost Advisory
Ends in 46 min
When
Until 9 AM EDT this morning.
Where
Portions of central, northern, and southern New Jersey and southeast Pennsylvania.
Issued for this forecast zone · National Weather Service Mount Holly NJ
What, impacts and precautionsHide details
What
Temperatures as low as 32 will result in frost formation.
Impacts
Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.
Precautionary actions
Take steps now to protect tender plants from the cold.
Areas: Middlesex; Western Monmouth; Mercer; Salem; Gloucester; Camden; Northwestern Burlington; Ocean; Cumberland; Atlantic; Southeastern Burlington; Delaware; Philadelphia; Eastern Chester; Eastern Montgomery; Lower Bucks
See it on weather.gov (opens in a new tab)

Observed 7:50 AM EDT at KSMQ

Dunellen, NJ weather

Sunny and 30°−1°.

Forecasts agree

Now 30°−1°

Sunny

Wind: Calm; Light through 8 PM
Dew point: 28°−2°; Dry, static shocks likely
Humidity: 93%; Air 30°−1°, dew point 28°−2° · frost likely
UV index: 0Low; Moderate 12–3 PM · peak 3
Air quality: 64Moderate; 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 9 PM
Low 36°2° tomorrow at 6 AM

This morningUp to 53°12° by 11 AM · Partly cloudy
This afternoonUp to 63°17° by 4 PM · Clear
TonightDown to 38°3° by 3 AM · Clear
Tomorrow morningUp to 57°14° by 11 AM · Clear
Tomorrow afternoonUp to 66°19° by 4 PM · Clear
Tomorrow nightDown to 40°4° by 4 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	37°3° (likely 33°1° to 41°5°)	37°3°	0%	1 mph2 km/h from N, gusts 5 mph7 km/h	85%	33%	0
Sat 9a	Sunny	41°5° (likely 40°4° to 45°7°)	41°5°	0%	1 mph2 km/h from N, gusts 4 mph7 km/h	79%	34%	0
Sat 10a	Sunny	48°9° (likely 48°9° to 51°11°)	48°9°	0%	1 mph2 km/h from N, gusts 5 mph7 km/h	63%	39%	1
Sat 11a	Sunny	53°12° (likely 53°12° to 55°13°)	53°12°	0%	0 mph0 km/h, gusts 4 mph6 km/h	52%	39%	2
Sat 12p	Partly sunny	56°13° (likely 56°13° to 58°14°)	56°13°	0%	0 mph0 km/h, gusts 2 mph3 km/h	45%	33%	3
Sat 1p	Sunny	58°14° (likely 58°14° to 61°16°)	58°14°	0%	0 mph0 km/h, gusts 3 mph4 km/h	40%	22%	3
Sat 2p	Partly sunny	61°16° (likely 60°16° to 62°17°)	61°16°	0%	0 mph0 km/h, gusts 3 mph4 km/h	36%	21%	3
Sat 3p	Mostly sunny	62°17° (likely 61°16° to 63°17°)	62°17°	0%	0 mph0 km/h, gusts 3 mph5 km/h	33%	17%	2
Sat 4p	Sunny	63°17° (likely 61°16° to 63°17°)	63°17°	0%	0 mph0 km/h, gusts 3 mph5 km/h	32%	6%	1
Sat 5p	Sunny	61°16° (likely 60°16° to 61°16°)	61°16°	0%	1 mph2 km/h from SW, gusts 4 mph6 km/h	35%	2%	0
Sat 6p	Clear	58°14° (likely 55°13° to 58°14°)	58°14°	0%	0 mph0 km/h, gusts 5 mph7 km/h	42%	0%	0
Sat 7p	Clear	54°12° (likely 51°11° to 54°12°)	54°12°	0%	0 mph0 km/h, gusts 4 mph6 km/h	50%	0%	0
Sat 8p	Clear	50°10° (likely 48°9° to 52°11°)	50°10°	0%	0 mph0 km/h, gusts 3 mph5 km/h	58%	0%	0
Sat 9p	Clear	48°9° (likely 47°8° to 50°10°)	48°9°	0%	0 mph0 km/h, gusts 3 mph6 km/h	63%	0%	0
Sat 10p	Clear	46°8° (likely 45°7° to 48°9°)	46°8°	0%	0 mph0 km/h, gusts 4 mph6 km/h	63%	2%	0
Sat 11p	Clear	44°7° (likely 43°6° to 47°8°)	44°7°	0%	0 mph0 km/h, gusts 4 mph7 km/h	65%	6%	0
Sun 12a	Clear	43°6° (likely 42°6° to 45°7°)	43°6°	0%	0 mph0 km/h, gusts 4 mph7 km/h	67%	2%	0
Sun 1a	Clear	41°5° (likely 41°5° to 44°7°)	41°5°	0%	0 mph0 km/h, gusts 6 mph10 km/h	73%	0%	0
Sun 2a	Clear	40°4° (likely 40°4° to 43°6°)	40°4°	0%	0 mph0 km/h, gusts 5 mph9 km/h	76%	0%	0
Sun 3a	Clear	38°3° (likely 38°3° to 42°6°)	38°3°	0%	0 mph0 km/h, gusts 5 mph8 km/h	82%	0%	0
Sun 4a	Clear	38°3° (likely 38°3° to 41°5°)	38°3°	0%	1 mph2 km/h from NW, gusts 5 mph8 km/h	82%	0%	0
Sun 5a	Clear	38°3° (likely 37°3° to 40°4°)	38°3°	0%	1 mph2 km/h from NW, gusts 4 mph7 km/h	79%	0%	0
Sun 6a	Clear	36°2° (likely 36°2° to 40°4°)	36°2°	0%	0 mph0 km/h, gusts 4 mph7 km/h	85%	0%	0
Sun 7a	Sunny	37°3° (likely 36°2° to 39°4°)	37°3°	0%	0 mph0 km/h, gusts 4 mph7 km/h	82%	0%	0
Sun 8a	Sunny	38°3° (likely 36°2° to 39°4°)	38°3°	0%	1 mph2 km/h from NW, gusts 4 mph7 km/h	82%	0%	0
Sun 9a	Sunny	43°6° (likely 40°4° to 44°7°)	43°6°	0%	0 mph0 km/h, gusts 3 mph5 km/h	76%	0%	1
Sun 10a	Sunny	52°11° (likely 50°10° to 52°11°)	52°11°	0%	0 mph0 km/h, gusts 5 mph8 km/h	59%	0%	2
Sun 11a	Sunny	57°14° (likely 56°13° to 58°14°)	57°14°	0%	0 mph0 km/h, gusts 5 mph8 km/h	49%	0%	3
Sun 12p	Sunny	60°16° (likely 60°16° to 62°17°)	60°16°	0%	1 mph2 km/h from W, gusts 5 mph9 km/h	42%	0%	4
Sun 1p	Sunny	64°18° (likely 62°17° to 64°18°)	64°18°	0%	1 mph2 km/h from W, gusts 6 mph9 km/h	35%	0%	4
Sun 2p	Sunny	65°18° (likely 63°17° to 66°19°)	65°18°	0%	2 mph3 km/h from W, gusts 5 mph9 km/h	33%	0%	4
Sun 3p	Sunny	65°18° (likely 64°18° to 66°19°)	65°18°	0%	2 mph3 km/h from W, gusts 5 mph9 km/h	31%	0%	3
Sun 4p	Sunny	66°19° (likely 64°18° to 66°19°)	66°19°	0%	2 mph3 km/h from W, gusts 6 mph10 km/h	30%	0%	2
Sun 5p	Sunny	65°18° (likely 62°17° to 65°18°)	65°18°	0%	2 mph3 km/h from W, gusts 7 mph11 km/h	34%	0%	1
Sun 6p	Clear	61°16° (likely 56°13° to 61°16°)	61°16°	0%	1 mph2 km/h from W, gusts 5 mph8 km/h	42%	0%	0
Sun 7p	Clear	57°14° (likely 52°11° to 57°14°)	57°14°	0%	1 mph2 km/h from SW, gusts 5 mph8 km/h	51%	0%	0
Sun 8p	Clear	52°11° (likely 49°9° to 53°12°)	52°11°	0%	1 mph2 km/h from W, gusts 5 mph9 km/h	59%	0%	0
Sun 9p	Clear	49°9° (likely 47°8° to 51°11°)	49°9°	0%	0 mph0 km/h, gusts 5 mph9 km/h	68%	0%	0
Sun 10p	Clear	47°8° (likely 46°8° to 49°9°)	47°8°	0%	0 mph0 km/h, gusts 5 mph7 km/h	71%	0%	0
Sun 11p	Clear	45°7° (likely 44°7° to 47°8°)	45°7°	0%	0 mph0 km/h, gusts 6 mph9 km/h	73%	0%	0
Mon 12a	Clear	44°7° (likely 41°5° to 46°8°)	44°7°	0%	0 mph0 km/h, gusts 6 mph9 km/h	76%	0%	0
Mon 1a	Clear	43°6° (likely 40°4° to 46°8°)	43°6°	0%	1 mph2 km/h from W, gusts 7 mph11 km/h	79%	0%	0
Mon 2a	Clear	42°6° (likely 39°4° to 47°8°)	42°6°	0%	1 mph2 km/h from W, gusts 7 mph11 km/h	82%	0%	0
Mon 3a	Clear	41°5° (likely 39°4° to 50°10°)	41°5°	0%	1 mph2 km/h from W, gusts 6 mph10 km/h	85%	0%	0
Mon 4a	Clear	40°4° (likely 37°3° to 50°10°)	40°4°	0%	2 mph3 km/h from W, gusts 7 mph11 km/h	89%	1%	0
Mon 5a	Clear	40°4° (likely 36°2° to 49°9°)	40°4°	0%	2 mph3 km/h from W, gusts 7 mph11 km/h	89%	2%	0
Mon 6a	Clear	38°3° (likely 35°2° to 49°9°)	38°3°	0%	2 mph3 km/h from W, gusts 7 mph11 km/h	92%	2%	0
Mon 7a	Sunny	38°3° (likely 35°2° to 48°9°)	38°3°	0%	2 mph3 km/h from W, gusts 6 mph10 km/h	92%	11%	0

Days ahead

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

Today, Oct 24. Partly sunny. High 64°18°, low 36°2°. Typical 63°17° / 41°5°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 37°3°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 63°17°
  Dry
3. Evening
  6 PM–midnight
  Clear, 50°10°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 38°3°
  Dry
Official NWS forecast
Today: Patchy frost before 10am. Mostly sunny. High near 64, with temperatures falling to around 61 in the afternoon. Northwest wind around 1 mph.
Tonight: Areas of frost after 10pm. Clear. Low around 36, with temperatures rising to around 38 overnight. Northwest wind around 1 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
61°16°–64°18°
Low, likely
33°1°–39°4°
Typical high / low
63°17° / 41°5°
Wind
5 mph9 km/h
UV peak
4
Tomorrow, Oct 25. Sunny. High 67°19°, low 38°3°. Typical 63°17° / 41°5°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 38°3°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 52°11°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 40°4°
  Dry
Official NWS forecast
Day: Areas of frost before 9am. Sunny. High near 67, with temperatures falling to around 65 in the afternoon. West wind around 2 mph.
Night: Clear. Low around 38, with temperatures rising to around 40 overnight. West wind around 2 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
64°18°–67°19°
Low, likely
36°2°–38°3°
Typical high / low
63°17° / 41°5°
Wind
6 mph9 km/h
UV peak
4
Monday, Oct 26. Sunny. High 70°21°, low 47°8°. Typical 63°17° / 40°4°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 41°5°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 69°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 52°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 70. West wind around 5 mph.
Night: Clear. Low around 47, with temperatures rising to around 49 overnight.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
68°20°–70°21°
Low, likely
36°2°–47°8°
Typical high / low
63°17° / 40°4°
Wind
8 mph12 km/h, gusts 17 mph28 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 62°17°, low 39°4°. Typical 62°17° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 49°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 61°16°
  Dry
3. Evening
  6 PM–midnight
  Clear, 51°11°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 41°5°
  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 39.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
58°14°–64°18°
Low, likely
39°4°–51°11°
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 61°16°, low 43°6°. Typical 62°17° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 41°5°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 59°15°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 52°11°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 45°7°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 61.
Night: Partly cloudy, with a low around 43.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
57°14°–62°17°
Low, likely
35°2°–45°7°
Typical high / low
62°17° / 40°4°
Wind
7 mph11 km/h, gusts 12 mph20 km/h
UV peak
3
Thursday, Oct 29. Partly sunny. High 68°20°, low 48°9°. Typical 62°17° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 45°7°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 49°9°
  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 48.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
64°18°–68°20°
Low, likely
41°5°–48°9°
Typical high / low
62°17° / 40°4°
Wind
8 mph13 km/h, gusts 31 mph49 km/h
UV peak
4
Friday, Oct 30. Mostly sunny. High 70°21°, low 47°8°. Typical 61°16° / 39°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 72°22°
  Dry
3. Evening
  6 PM–midnight
  Clear, 60°15°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 49°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 70.
Night: Mostly clear, with a low around 47.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
70°21°–74°23°
Low, likely
43°6°–50°10°
Typical high / low
61°16° / 39°4°
Wind
10 mph16 km/h, gusts 23 mph37 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 69°21°, low 49°9°. Typical 61°16° / 39°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 69°21°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 59°15°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 50°10°
  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
62°17°–74°23°
Low, likely
43°6°–53°12°
Typical high / low
61°16° / 39°4°
Wind
11 mph17 km/h, gusts 26 mph42 km/h
UV peak
4
Sunday, Nov 1. Cloudy. High 67°19°, low 49°9°. Typical 61°16° / 39°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 49°10°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 59°15°
  20% chance
4. Overnight
  midnight–6 AM
  Mostly clear, 55°13°
  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
57°14°–72°22°
Low, likely
46°8°–53°12°
Typical high / low
61°16° / 39°4°
Wind
8 mph13 km/h, gusts 22 mph35 km/h
UV peak
4
Monday, Nov 2. Cloudy. High 66°19°, low 55°13°. Typical 60°16° / 38°3°. Rain 0.05 in1.3 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 57°14°
  30% chance
2. Afternoon
  noon–6 PM
  Cloudy, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 60°16°
  20% 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
54°12°–73°23°
Low, likely
48°9°–59°15°
Typical high / low
60°16° / 38°3°
Wind
9 mph14 km/h, gusts 17 mph28 km/h
UV peak
2

10 days15 days30 days

The outlook

Today
Dry, high 64°, low 36°.
Tomorrow
Dry, high 67°, low 38°, warming up.
Monday
Dry, high 70°, low 47°, warming up.
Rest of week
Mostly dry, highs 61–70°.

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

Raritan River at Bound Brook

5.1 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

Raritan River at Manville

6.6 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

Passaic River near Millington

7.0 mi

Below flood stage

Level: 4.8 ft
Flow: 34 cfs

Forecast peak 4.8 ft Sat 8 AM

Reading from Sat 6:30 AM · NWS gauge page

Green Brook at Plainfield

0.9 mi

Below flood stage

Level: 0.9 ft

Reading from Sat 6:30 AM · NWS gauge page

For your home

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

Heating this week

About 68% less heating than a typical week.

This week 30Typical 97

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 23
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 11 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

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

Sun & moon

Sun

Daylight: 10 h 46 min; Losing 2 min 35 s a day; shortest Dec 21, 1 h 30 min less
Golden hour: 5:26–6:21 PM; Morning 7:01–7:56 AM
Blue hour: 6:21–6:32 PM; Morning 6:50–7:01 AM; first light 6:50 AM

Stars tonight? Fair

Clear 6:32 PM–6:52 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

96% lit · growing

Today: sets 5:29 AM · rises 5:01 PM
Full moon: Oct 26
New moon: Nov 9

Looking northwest from Dunellen. The highest point on the skyline is about 600 ft, 2 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

Frost Advisory

Dunellen, NJ weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Raritan River at Bound Brook

Raritan River at Manville

Passaic River near Millington

Green Brook at Plainfield

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