Freeze Warning
Starts in 1 h 22 min
When
From 10 PM this evening to 9 AM EDT Sunday.
Where
Mercer, Western Monmouth, Middlesex, Atlantic, Cumberland, Northwestern Burlington, Ocean, and Southeastern Burlington Counties.
Issued for this forecast zone · National Weather Service Mount Holly NJ
What, impacts and precautionsHide details
What
Sub-freezing temperatures as low as 30 degrees and widespread frost expected.
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: Middlesex; Western Monmouth; Mercer; Northwestern Burlington; Ocean; Cumberland; Atlantic; Southeastern Burlington
See it on weather.gov (opens in a new tab)

Observed 8:15 PM EDT at KTTN

Windsor, NJ weather

Freeze Warning. 48°9° and clear now.

Forecasts agree

Now 48°9°

Clear

Wind: Calm; Light through 8 AM
Dew point: 34°1°; Dry, static shocks likely
UV tomorrow: 4Moderate; Moderate 11 AM–4 PM · peak 4
Air quality: 33Good; Ozone · tomorrow moderate
Pressure: 30.54 inHg1034 hPa; Rising slowly · +0.03 inHg+0.9 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

About the same as this time yesterday (48°9° then, 49°9° now)

Good hours for

Below freezing tonight 5–8 AM (low 31°−1°)
Above 50°10° tomorrow by 10 AM
High 66°19° tomorrow at 3 PM
Drops 12°7° tomorrow night 6–9 PM (59°15° → 47°8°)
Below 50°10° tomorrow night after 8 PM

TonightDown to 32°0° by 5 AM · freezing, low 32°0° · Clear
Tomorrow morningUp to 57°14° by 11 AM · freezing, low 31°−1° · Clear
Tomorrow afternoonUp to 66°19° by 3 PM · Clear
Tomorrow nightDown to 35°2° by 3 AM · Clear
Monday morningUp to 58°14° by 11 AM · Clear
Monday afternoonUp to 70°21° by 3 PM · 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 8p	Clear	45°7° (likely 45°7° to 51°11°)	45°7°	0%	0 mph0 km/h, gusts 5 mph8 km/h	65%	53%	0
Sat 9p	Clear	42°6° (likely 42°6° to 49°9°)	42°6°	0%	0 mph0 km/h, gusts 5 mph8 km/h	76%	26%	0
Sat 10p	Clear	40°4° (likely 40°4° to 47°8°)	40°4°	0%	0 mph0 km/h, gusts 7 mph12 km/h	82%	34%	0
Sat 11p	Clear	37°3° (likely 37°3° to 43°6°)	37°3°	0%	0 mph0 km/h, gusts 7 mph11 km/h	92%	8%	0
Sun 12a	Clear	36°2° (likely 36°2° to 42°6°)	36°2°	0%	0 mph0 km/h, gusts 7 mph11 km/h	96%	8%	0
Sun 1a	Clear	35°2° (likely 35°2° to 41°5°)	35°2°	0%	0 mph0 km/h, gusts 7 mph11 km/h	100%	2%	0
Sun 2a	Clear	34°1° (likely 34°1° to 41°5°)	34°1°	0%	0 mph0 km/h, gusts 5 mph8 km/h	100%	1%	0
Sun 3a	Clear	33°1° (likely 33°1° to 40°4°)	33°1°	0%	0 mph0 km/h, gusts 4 mph7 km/h	100%	1%	0
Sun 4a	Clear	33°1° (likely 33°1° to 40°4°)	33°1°	0%	0 mph0 km/h, gusts 3 mph6 km/h	100%	1%	0
Sun 5a	Clear	32°0° (likely 32°0° to 39°4°)	32°0°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	2%	0
Sun 6a	Clear	32°0° (likely 32°0° to 39°4°)	32°0°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	6%	0
Sun 7a	Sunny	31°−1° (likely 31°−1° to 38°3°)	31°−1°	0%	0 mph0 km/h, gusts 3 mph4 km/h	100%	15%	0
Sun 8a	Sunny	33°1° (likely 32°0° to 38°3°)	33°1°	0%	0 mph0 km/h, gusts 2 mph4 km/h	100%	15%	0
Sun 9a	Sunny	42°6° (likely 38°3° to 44°7°)	42°6°	0%	0 mph0 km/h, gusts 3 mph4 km/h	79%	10%	1
Sun 10a	Sunny	51°11° (likely 50°10° to 52°11°)	51°11°	0%	0 mph0 km/h, gusts 3 mph5 km/h	61%	0%	2
Sun 11a	Sunny	57°14° (likely 57°14° to 58°14°)	57°14°	0%	0 mph0 km/h, gusts 5 mph9 km/h	51%	0%	3
Sun 12p	Sunny	61°16° (likely 61°16° to 62°17°)	61°16°	0%	5 mph8 km/h from NW, gusts 7 mph12 km/h	42%	0%	4
Sun 1p	Sunny	63°17° (likely 63°17° to 65°18°)	63°17°	0%	5 mph8 km/h from W, gusts 8 mph13 km/h	38%	0%	4
Sun 2p	Sunny	65°18° (likely 64°18° to 66°19°)	65°18°	0%	5 mph8 km/h from W, gusts 7 mph11 km/h	35%	0%	4
Sun 3p	Sunny	66°19° (likely 64°18° to 66°19°)	66°19°	0%	0 mph0 km/h, gusts 6 mph9 km/h	34%	0%	3
Sun 4p	Sunny	66°19° (likely 64°18° to 66°19°)	66°19°	0%	0 mph0 km/h, gusts 6 mph10 km/h	34%	0%	2
Sun 5p	Sunny	64°18° (likely 62°17° to 64°18°)	64°18°	0%	0 mph0 km/h, gusts 6 mph10 km/h	38%	0%	1
Sun 6p	Clear	59°15° (likely 57°14° to 59°15°)	59°15°	0%	0 mph0 km/h, gusts 6 mph10 km/h	45%	0%	0
Sun 7p	Clear	53°12° (likely 53°12° to 55°13°)	53°12°	0%	0 mph0 km/h, gusts 5 mph9 km/h	59%	0%	0
Sun 8p	Clear	47°8° (likely 47°8° to 52°11°)	47°8°	0%	0 mph0 km/h, gusts 5 mph8 km/h	71%	0%	0
Sun 9p	Clear	43°6° (likely 43°6° to 51°11°)	43°6°	0%	0 mph0 km/h, gusts 7 mph12 km/h	82%	0%	0
Sun 10p	Clear	41°5° (likely 41°5° to 49°9°)	41°5°	0%	0 mph0 km/h, gusts 8 mph13 km/h	89%	0%	0
Sun 11p	Clear	39°4° (likely 39°4° to 47°8°)	39°4°	0%	0 mph0 km/h, gusts 6 mph10 km/h	96%	0%	0
Mon 12a	Clear	37°3° (likely 37°3° to 46°8°)	37°3°	0%	0 mph0 km/h, gusts 5 mph9 km/h	100%	0%	0
Mon 1a	Clear	36°2° (likely 36°2° to 45°7°)	36°2°	0%	0 mph0 km/h, gusts 6 mph9 km/h	100%	2%	0
Mon 2a	Clear	36°2° (likely 36°2° to 43°6°)	36°2°	0%	0 mph0 km/h, gusts 6 mph9 km/h	100%	2%	0
Mon 3a	Clear	35°2° (likely 35°2° to 43°6°)	35°2°	0%	0 mph0 km/h, gusts 6 mph9 km/h	100%	5%	0
Mon 4a	Clear	35°2° (likely 35°2° to 42°6°)	35°2°	0%	0 mph0 km/h, gusts 6 mph10 km/h	100%	5%	0
Mon 5a	Clear	35°2° (likely 35°2° to 42°6°)	35°2°	0%	0 mph0 km/h, gusts 7 mph11 km/h	100%	5%	0
Mon 6a	Clear	35°2° (likely 35°2° to 42°6°)	35°2°	0%	0 mph0 km/h, gusts 6 mph10 km/h	100%	4%	0
Mon 7a	Sunny	35°2° (likely 35°2° to 41°5°)	35°2°	0%	0 mph0 km/h, gusts 7 mph11 km/h	100%	5%	0
Mon 8a	Sunny	36°2° (likely 36°2° to 43°6°)	36°2°	0%	0 mph0 km/h, gusts 6 mph10 km/h	100%	8%	0
Mon 9a	Sunny	46°8° (likely 42°6° to 47°8°)	45°7°	0%	5 mph8 km/h from W, gusts 7 mph11 km/h	83%	1%	1
Mon 10a	Sunny	53°12° (likely 52°11° to 54°12°)	53°12°	0%	5 mph8 km/h from W, gusts 12 mph19 km/h	69%	6%	2
Mon 11a	Sunny	58°14° (likely 58°14° to 59°15°)	58°14°	0%	5 mph8 km/h from W, gusts 15 mph23 km/h	62%	9%	3
Mon 12p	Sunny	62°17° (likely 62°17° to 63°17°)	62°17°	0%	5 mph8 km/h from W, gusts 14 mph22 km/h	54%	8%	4
Mon 1p	Sunny	65°18° (likely 64°18° to 66°19°)	65°18°	0%	5 mph8 km/h from W, gusts 13 mph21 km/h	48%	2%	4
Mon 2p	Sunny	68°20° (likely 66°19° to 68°20°)	68°20°	0%	5 mph8 km/h from W, gusts 13 mph20 km/h	44%	3%	4
Mon 3p	Sunny	70°21° (likely 66°19° to 70°21°)	70°21°	0%	5 mph8 km/h from W, gusts 13 mph21 km/h	41%	1%	3
Mon 4p	Sunny	70°21° (likely 66°19° to 70°21°)	70°21°	0%	5 mph8 km/h from W, gusts 14 mph22 km/h	42%	0%	2
Mon 5p	Sunny	68°20° (likely 65°18° to 68°20°)	68°20°	0%	5 mph8 km/h from W, gusts 14 mph22 km/h	45%	0%	1
Mon 6p	Clear	64°18° (likely 59°15° to 64°18°)	64°18°	0%	5 mph8 km/h from W, gusts 8 mph12 km/h	54%	0%	0
Mon 7p	Clear	59°15° (likely 56°13° to 60°16°)	59°15°	0%	0 mph0 km/h, gusts 8 mph13 km/h	64%	1%	0

Days ahead

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

Today, Oct 24. Cloudy. High 62°17°, low 31°−1°. Typical 62°17° / 43°6°. Dry. Forecasts agree.
1. Evening
  6 PM–midnight
  Clear, 45°7°
  Dry
2. Overnight
  midnight–6 AM
  Clear, 32°0°
  Dry
Official NWS forecast
Tonight: Widespread frost after 10pm. Clear, with a low around 31. Southwest wind around 0 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
61°16°–62°17°
Low, likely
31°−1°–35°2°
Typical high / low
62°17° / 43°6°
Wind
6 mph9 km/h, gusts 11 mph18 km/h
UV peak
4
Tomorrow, Oct 25. Sunny. High 67°19°, low 35°2°. Typical 62°17° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 33°1°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 47°8°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 35°2°
  Dry
Official NWS forecast
Day: Widespread frost before 9am. Sunny, with a high near 67. West wind 0 to 5 mph.
Night: Patchy frost after 11pm. Clear, with a low around 35. West wind around 0 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
64°18°–67°19°
Low, likely
32°0°–37°3°
Typical high / low
62°17° / 42°6°
Wind
6 mph10 km/h, gusts 12 mph19 km/h
UV peak
4
Monday, Oct 26. Mostly sunny. High 70°21°, low 44°7°. Typical 62°17° / 42°6°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 36°2°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 70°21°
  Dry
3. Evening
  6 PM–midnight
  Clear, 55°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 50°10°
  Dry
Official NWS forecast
Day: Patchy frost before 9am. Sunny, with a high near 70. West wind 0 to 5 mph.
Night: Mostly clear, with a low around 44. Northwest wind 0 to 5 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
67°19°–70°21°
Low, likely
36°2°–44°7°
Typical high / low
62°17° / 42°6°
Wind
9 mph15 km/h, gusts 19 mph30 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 64°18°, low 38°3°. Typical 61°16° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 47°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 62°17°
  Dry
3. Evening
  6 PM–midnight
  Clear, 48°9°
  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 64.
Night: Mostly clear, with a low around 38.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
59°15°–64°18°
Low, likely
38°3°–47°8°
Typical high / low
61°16° / 42°6°
Wind
8 mph14 km/h, gusts 25 mph40 km/h
UV peak
4
Wednesday, Oct 28. Partly sunny. High 64°18°, low 42°6°. Typical 61°16° / 41°5°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 41°5°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 62°17°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 51°11°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 46°8°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 64.
Night: Partly cloudy, with a low around 42.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
60°16°–64°18°
Low, likely
36°2°–43°6°
Typical high / low
61°16° / 41°5°
Wind
8 mph14 km/h, gusts 14 mph23 km/h
UV peak
4
Thursday, Oct 29. Cloudy. High 70°21°, low 47°8°. Typical 61°16° / 41°5°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 46°8°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 50°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly 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
66°19°–70°21°
Low, likely
44°7°–47°8°
Typical high / low
61°16° / 41°5°
Wind
11 mph18 km/h, gusts 30 mph48 km/h
UV peak
4
Friday, Oct 30. Mostly sunny. High 73°23°, low 48°9°. Typical 60°16° / 41°5°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 49°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 73°23°
  Dry
3. Evening
  6 PM–midnight
  Clear, 60°16°
  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 73.
Night: Mostly clear, with a low around 48.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
72°22°–74°23°
Low, likely
45°7°–51°11°
Typical high / low
60°16° / 41°5°
Wind
9 mph15 km/h, gusts 15 mph25 km/h
UV peak
4
Saturday, Oct 31. Partly sunny. High 70°21°, low 47°8°. Typical 60°16° / 40°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 69°20°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 50°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 70.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
62°17°–73°23°
Low, likely
44°7°–51°11°
Typical high / low
60°16° / 40°4°
Wind
9 mph14 km/h, gusts 15 mph24 km/h
UV peak
4
Sunday, Nov 1. Cloudy. High 70°21°, low 50°10°. Typical 60°16° / 40°4°. Rain, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 51°11°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 70°21°
  20% chance
3. Evening
  6 PM–midnight
  Drizzle, 62°17°
  30% chance · 0.02 in0.5 mm
4. Overnight
  midnight–6 AM
  Drizzle, 61°16°
  30% chance · 0.14 in3.5 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
66°19°–73°23°
Low, likely
45°7°–53°12°
Typical high / low
60°16° / 40°4°
Wind
11 mph17 km/h, gusts 28 mph45 km/h
UV peak
3
Monday, Nov 2. Drizzle. High 70°21°, low 59°15°. Typical 59°15° / 40°4°. Rain 0.24 in6.1 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 63°17°
  30% chance · 0.13 in3.3 mm
2. Afternoon
  noon–6 PM
  Drizzle, 70°21°
  30% chance · 0.01 in0.3 mm
3. Evening
  6 PM–midnight
  Clear, 64°18°
  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
66°19°–77°25°
Low, likely
56°13°–66°19°
Typical high / low
59°15° / 40°4°
Wind
18 mph29 km/h, gusts 39 mph63 km/h
UV peak
2

10 days15 days30 days

The outlook

Today
Dry, high 62°, low 31°.
Tomorrow
Dry, high 67°, low 35°, warming up.
Monday
Dry, high 70°, low 44°, warming up.
Rest of week
Mostly dry, highs 64–73°.

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

Assunpink Creek at Trenton

9.0 mi

Below flood stage

Level: 2.9 ft
Flow: 68 cfs

Forecast peak 2.9 ft Sat 8 PM

Reading from Sat 6:15 PM · NWS gauge page

Delaware River at Trenton

11 mi

Below flood stage

Level: 8.6 ft
Flow: 4,290 cfs

Forecast peak 8.6 ft Sat 8 PM

Reading from Sat 6:15 PM · NWS gauge page

Delaware River at Washington Crossing

16 mi

Below flood stage

Level: -1.5 ft

Forecast peak -1.4 ft Sun 8 AM

Reading from Sat 7 PM · NWS gauge page

Assunpink Creek at Clarksville

5.0 mi

Below flood stage

Level: 3.9 ft
Flow: 23 cfs

Reading from Sat 7 PM · NWS gauge page

For your home

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

Heating this week

About 63% less heating than a typical week.

This week 35Typical 95

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 27
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 22 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 34°F).

Open the windows?

Sun, 12:00 PM–5:00 PM

Good stretch to open the windows.

Is this typical?

Trenton-Mercer Airport · official normals 1991–2020 · records 1865–2026

Oct 24, today vs a typical year

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

Last 7 days vs normal

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

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

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

Sun & moon

Sun

Daylight: 10 h 47 min; Losing 2 min 30 s a day; shortest Dec 21, 1 h 29 min less
Golden hour: 5:27–6:22 PM; Morning 7:01–7:56 AM
Blue hour: 6:22–6:33 PM; Morning 6:51–7:01 AM; first light 6:51 AM

Stars tonight? Fair

Mostly clear 11 PM–6:52 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

98% lit · growing

Today: sets 5:30 AM · rises 5:02 PM
Full moon: Oct 26
New moon: Nov 9

Looking northwest from Windsor. The highest point on the skyline is about 4,300 ft, 59 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

Windsor, NJ weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Assunpink Creek at Trenton

Delaware River at Trenton

Delaware River at Washington Crossing

Assunpink Creek at Clarksville

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