Frost Advisory
Ends in 1 h 14 min
When
Until 9 AM EDT this morning.
Where
In Delaware, Kent and New Castle Counties. In Maryland, Caroline, Kent MD, Queen Annes, and Talbot Counties.
Issued for this forecast zone · National Weather Service Mount Holly NJ
What, impacts and precautionsHide details
What
Temperatures as low as 34 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: New Castle; Kent; Kent; Queen Anne's; Talbot; Caroline
See it on weather.gov (opens in a new tab)

Observed 6:55 AM EDT at KDOV

Hartly, DE weather

Clear and 39°4°.

Forecasts agree

Now 39°4°

Clear · Feels like 34°1°

Feels like: 34°1°; Wind chill from 8 mph13 km/h wind · air 39°4°
Wind: 8 mph13 km/h; From the north. Up to 8 mph13 km/h through 7 PM
Dew point: 38°3°; Comfortable
Humidity: 93%; Air 39°4°, dew point 38°3° · fog or dew likely
UV index: 0Low; Moderate 12–3 PM · peak 4
Air quality: 38Good; Main pollutant: PM2.5 (fine particles)
Pressure: 30.49 inHg1033 hPa; Rising slowly · +0.04 inHg+1.3 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

10°5° cooler than this time yesterday (49°10° then, 39°4° now)

Good hours for

Above 50°10° today by 10 AM
High 62°17° today at 4 PM
Below 50°10° tonight after 8 PM
Drops 12°7° tomorrow night 6–9 PM (60°16° → 48°9°)

This morningUp to 54°12° by 11 AM · Clear
This afternoonUp to 62°17° by 4 PM · Clear
TonightDown to 40°4° by 3 AM · Clear
Tomorrow morningUp to 57°14° by 11 AM · Clear
Tomorrow afternoonUp to 65°18° by 4 PM · Clear
Tomorrow nightDown to 39°4° 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 7a	Sunny	35°2° (likely 35°2° to 40°4°)	32°0°	0%	5 mph8 km/h from N, gusts 9 mph15 km/h	92%	8%	0
Sat 8a	Sunny	37°3° (likely 37°3° to 41°5°)	34°1°	0%	5 mph8 km/h from N, gusts 8 mph13 km/h	92%	10%	0
Sat 9a	Sunny	42°6° (likely 42°6° to 46°8°)	40°4°	0%	5 mph8 km/h from NE, gusts 8 mph12 km/h	89%	16%	0
Sat 10a	Sunny	50°10° (likely 49°9° to 52°11°)	49°9°	0%	5 mph8 km/h from NE, gusts 9 mph15 km/h	71%	12%	1
Sat 11a	Sunny	54°12° (likely 53°12° to 57°14°)	54°12°	0%	5 mph8 km/h from NE, gusts 9 mph14 km/h	59%	1%	2
Sat 12p	Sunny	56°13° (likely 56°13° to 60°16°)	56°13°	0%	5 mph8 km/h from E, gusts 9 mph14 km/h	53%	4%	3
Sat 1p	Sunny	59°15° (likely 58°14° to 61°16°)	59°15°	0%	5 mph8 km/h from E, gusts 7 mph12 km/h	47%	6%	4
Sat 2p	Sunny	61°16° (likely 60°16° to 62°17°)	61°16°	0%	5 mph8 km/h from E, gusts 7 mph11 km/h	44%	8%	3
Sat 3p	Sunny	61°16° (likely 60°16° to 62°17°)	61°16°	0%	5 mph8 km/h from E, gusts 6 mph10 km/h	42%	8%	2
Sat 4p	Sunny	62°17° (likely 60°16° to 62°17°)	62°17°	0%	5 mph8 km/h from E, gusts 6 mph10 km/h	41%	2%	1
Sat 5p	Sunny	60°16° (likely 59°15° to 60°16°)	60°16°	0%	5 mph8 km/h from E, gusts 6 mph10 km/h	44%	8%	0
Sat 6p	Clear	58°14° (likely 55°13° to 58°14°)	58°14°	0%	0 mph0 km/h, gusts 5 mph8 km/h	53%	5%	0
Sat 7p	Clear	52°11° (likely 50°10° to 52°11°)	52°11°	0%	0 mph0 km/h, gusts 5 mph8 km/h	69%	0%	0
Sat 8p	Clear	47°8° (likely 47°8° to 50°10°)	47°8°	0%	0 mph0 km/h, gusts 4 mph6 km/h	86%	0%	0
Sat 9p	Clear	46°8° (likely 46°8° to 49°9°)	46°8°	0%	0 mph0 km/h, gusts 3 mph5 km/h	86%	0%	0
Sat 10p	Clear	44°7° (likely 44°7° to 48°9°)	44°7°	0%	0 mph0 km/h, gusts 3 mph5 km/h	89%	0%	0
Sat 11p	Clear	43°6° (likely 43°6° to 47°8°)	43°6°	0%	0 mph0 km/h, gusts 3 mph5 km/h	93%	0%	0
Sun 12a	Clear	43°6° (likely 43°6° to 46°8°)	43°6°	0%	0 mph0 km/h, gusts 4 mph7 km/h	93%	0%	0
Sun 1a	Clear	42°6° (likely 42°6° to 46°8°)	42°6°	0%	0 mph0 km/h, gusts 4 mph7 km/h	93%	0%	0
Sun 2a	Clear	42°6° (likely 42°6° to 45°7°)	42°6°	0%	0 mph0 km/h, gusts 4 mph6 km/h	93%	0%	0
Sun 3a	Clear	40°4° (likely 40°4° to 45°7°)	40°4°	0%	0 mph0 km/h, gusts 5 mph8 km/h	92%	1%	0
Sun 4a	Clear	40°4° (likely 39°4° to 44°7°)	40°4°	0%	0 mph0 km/h, gusts 5 mph9 km/h	92%	2%	0
Sun 5a	Clear	40°4° (likely 38°3° to 43°6°)	40°4°	0%	0 mph0 km/h, gusts 7 mph11 km/h	92%	2%	0
Sun 6a	Clear	38°3° (likely 38°3° to 43°6°)	38°3°	0%	0 mph0 km/h, gusts 7 mph12 km/h	92%	3%	0
Sun 7a	Sunny	39°4° (likely 37°3° to 42°6°)	39°4°	0%	0 mph0 km/h, gusts 8 mph12 km/h	92%	4%	0
Sun 8a	Sunny	40°4° (likely 39°4° to 41°5°)	40°4°	0%	0 mph0 km/h, gusts 7 mph11 km/h	92%	6%	0
Sun 9a	Sunny	45°7° (likely 45°7° to 47°8°)	45°7°	0%	0 mph0 km/h, gusts 7 mph11 km/h	86%	2%	1
Sun 10a	Sunny	53°12° (likely 52°11° to 54°12°)	53°12°	0%	0 mph0 km/h, gusts 8 mph12 km/h	69%	2%	2
Sun 11a	Sunny	57°14° (likely 56°13° to 59°15°)	57°14°	0%	5 mph8 km/h from NE, gusts 7 mph11 km/h	57%	4%	3
Sun 12p	Sunny	60°16° (likely 59°15° to 62°17°)	60°16°	0%	5 mph8 km/h from NE, gusts 6 mph9 km/h	49%	3%	4
Sun 1p	Sunny	63°17° (likely 60°16° to 63°17°)	63°17°	0%	0 mph0 km/h, gusts 6 mph9 km/h	41%	2%	4
Sun 2p	Sunny	64°18° (likely 62°17° to 64°18°)	64°18°	0%	0 mph0 km/h, gusts 5 mph8 km/h	40%	2%	4
Sun 3p	Sunny	64°18° (likely 62°17° to 65°18°)	64°18°	0%	0 mph0 km/h, gusts 5 mph7 km/h	40%	2%	4
Sun 4p	Sunny	65°18° (likely 63°17° to 65°18°)	65°18°	0%	0 mph0 km/h, gusts 5 mph7 km/h	38%	3%	3
Sun 5p	Sunny	63°17° (likely 62°17° to 63°17°)	63°17°	0%	0 mph0 km/h, gusts 4 mph6 km/h	44%	4%	1
Sun 6p	Clear	60°16° (likely 57°14° to 60°16°)	60°16°	0%	0 mph0 km/h, gusts 3 mph4 km/h	51%	0%	0
Sun 7p	Clear	54°12° (likely 52°11° to 54°12°)	54°12°	0%	0 mph0 km/h, gusts 5 mph8 km/h	64%	0%	0
Sun 8p	Clear	48°9° (likely 48°9° to 51°11°)	48°9°	0%	0 mph0 km/h, gusts 4 mph7 km/h	83%	0%	0
Sun 9p	Clear	46°8° (likely 46°8° to 49°9°)	46°8°	0%	0 mph0 km/h, gusts 3 mph5 km/h	86%	0%	0
Sun 10p	Clear	44°7° (likely 44°7° to 48°9°)	44°7°	0%	0 mph0 km/h, gusts 5 mph7 km/h	89%	0%	0
Sun 11p	Clear	43°6° (likely 43°6° to 47°8°)	43°6°	0%	0 mph0 km/h, gusts 5 mph8 km/h	89%	0%	0
Mon 12a	Clear	42°6° (likely 41°5° to 46°8°)	42°6°	0%	0 mph0 km/h, gusts 6 mph9 km/h	93%	1%	0
Mon 1a	Clear	41°5° (likely 40°4° to 45°7°)	41°5°	0%	0 mph0 km/h, gusts 6 mph9 km/h	92%	1%	0
Mon 2a	Clear	41°5° (likely 38°3° to 45°7°)	41°5°	0%	0 mph0 km/h, gusts 5 mph9 km/h	92%	2%	0
Mon 3a	Clear	40°4° (likely 37°3° to 46°8°)	40°4°	0%	0 mph0 km/h, gusts 4 mph6 km/h	92%	0%	0
Mon 4a	Clear	40°4° (likely 37°3° to 46°8°)	40°4°	0%	0 mph0 km/h, gusts 3 mph5 km/h	92%	0%	0
Mon 5a	Clear	39°4° (likely 37°3° to 46°8°)	39°4°	0%	0 mph0 km/h, gusts 3 mph5 km/h	92%	2%	0
Mon 6a	Mostly clear	38°3° (likely 36°2° to 46°8°)	38°3°	0%	0 mph0 km/h, gusts 3 mph5 km/h	92%	10%	0

Days ahead

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

Today, Oct 24. Sunny. High 63°17°, low 38°3°. Typical 66°19° / 46°8°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 37°3°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 62°17°
  Dry
3. Evening
  6 PM–midnight
  Clear, 47°8°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 40°4°
  Dry
Official NWS forecast
Today: Patchy frost before 10am. Sunny, with a high near 63. Northeast wind around 5 mph.
Tonight: Patchy frost after 10pm. Clear, with a low around 38. Northeast wind around 0 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
60°16°–63°17°
Low, likely
36°2°–39°4°
Typical high / low
66°19° / 46°8°
Wind
7 mph11 km/h, gusts 13 mph21 km/h
UV peak
4
Tomorrow, Oct 25. Sunny. High 66°19°, low 37°3°. Typical 66°19° / 46°8°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 40°4°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 48°9°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 39°4°
  Dry
Official NWS forecast
Day: Patchy frost before 9am. Sunny, with a high near 66. Northeast wind 0 to 5 mph.
Night: Clear, with a low around 37. Northwest wind around 0 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
63°17°–66°19°
Low, likely
37°3°–41°5°
Typical high / low
66°19° / 46°8°
Wind
6 mph9 km/h, gusts 11 mph17 km/h
UV peak
4
Monday, Oct 26. Mostly sunny. High 68°20°, low 47°8°. Typical 65°18° / 46°8°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 41°5°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 67°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 54°12°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 50°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 68. West wind 0 to 5 mph.
Night: Mostly clear, with a low around 47.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
66°19°–68°20°
Low, likely
37°3°–47°8°
Typical high / low
65°18° / 46°8°
Wind
9 mph14 km/h, gusts 16 mph26 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 65°18°, low 42°6°. Typical 65°18° / 45°7°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 52°11°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 45°7°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 65.
Night: Mostly clear, with a low around 42.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
63°17°–66°19°
Low, likely
42°6°–50°10°
Typical high / low
65°18° / 45°7°
Wind
11 mph18 km/h, gusts 25 mph40 km/h
UV peak
4
Wednesday, Oct 28. Cloudy. High 63°17°, low 45°7°. Typical 65°18° / 45°7°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 45°7°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 62°17°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 53°12°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 47°8°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 63.
Night: Mostly cloudy, with a low around 45.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
61°16°–64°18°
Low, likely
41°5°–46°8°
Typical high / low
65°18° / 45°7°
Wind
10 mph16 km/h, gusts 17 mph28 km/h
UV peak
4
Thursday, Oct 29. Partly sunny. High 68°20°, low 49°9°. Typical 64°18° / 45°7°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Partly sunny, 47°8°
  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, 49°10°
  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 49.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
65°18°–68°20°
Low, likely
45°7°–49°9°
Typical high / low
64°18° / 45°7°
Wind
7 mph10 km/h, gusts 25 mph40 km/h
UV peak
4
Friday, Oct 30. Mostly sunny. High 71°22°, low 48°9°. Typical 64°18° / 44°7°. Dry. Forecasts 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, 59°15°
  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 71.
Night: Mostly clear, with a low around 48.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
71°22°–73°23°
Low, likely
46°8°–51°11°
Typical high / low
64°18° / 44°7°
Wind
12 mph19 km/h, gusts 21 mph34 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 70°21°, low 49°9°. Typical 64°18° / 44°7°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Mostly sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 69°21°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 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
60°16°–74°23°
Low, likely
47°8°–51°11°
Typical high / low
64°18° / 44°7°
Wind
15 mph24 km/h, gusts 25 mph40 km/h
UV peak
3
Sunday, Nov 1. Cloudy. High 69°21°, low 50°10°. Typical 63°17° / 44°7°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Mostly sunny, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 56°13°
  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°–72°22°
Low, likely
42°6°–54°12°
Typical high / low
63°17° / 44°7°
Wind
12 mph19 km/h, gusts 22 mph35 km/h
UV peak
3
Monday, Nov 2. Cloudy. High 68°20°, low 57°14°. Typical 63°17° / 43°6°. Rain 0.04 in1 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 59°15°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 69°21°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 59°15°
  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
57°14°–74°23°
Low, likely
51°11°–60°16°
Typical high / low
63°17° / 43°6°
Wind
11 mph17 km/h, gusts 25 mph40 km/h
UV peak
2

10 days15 days30 days

The outlook

Today
Dry, high 63°, low 38°.
Tomorrow
Dry, high 66°, low 37°, warming up.
Monday
Dry, high 68°, low 47°.
Rest of week
Mostly dry, highs 63–71°.

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

Murderkill River at Bowers Beach (IN MLLW)

19 mi

Below flood stage

Level: 5.4 ft

Forecast peak 7.0 ft Sat 8 AM, minor flooding

Reading from Sat 6:18 AM · NWS gauge page

Unicorn Branch near Millington

9.8 mi

Level: 1.7 ft

Reading from Sat 6 AM · NWS gauge page

St. Jones River at Dover

10 mi

Below flood stage

Level: 2.5 ft

Reading from Sat 6:15 AM · NWS gauge page

Cohansey River at Greenwich (IN MLLW)

24 mi

Below flood stage

Level: 4.7 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 55% less heating than a typical week.

This week 31Typical 69

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 26
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 17 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 38°F).

Open the windows?

Today, 2:00 PM–5:00 PM

Good stretch to open the windows.

Is this typical?

DOVER · official normals 1991–2020 · records 1893–2026

Oct 24, today vs a typical year

Today’s expected high is 3°2° colder than typical.

Last 7 days vs normal

On average 3°2° colder than normal (daily mean temperature).

−11°−6°SunOct 18
−6°−3°MonOct 19
−3°−2°TueOct 20
±0°WedOct 21
−1°ThuOct 22
+1°FriOct 23
—SatOct 24

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

Sun & moon

Sun

Daylight: 10 h 50 min; Losing 2 min 21 s a day; shortest Dec 21, 1 h 25 min less
Golden hour: 5:34–6:28 PM; Morning 7:05–7:59 AM
Blue hour: 6:28–6:38 PM; Morning 6:54–7:05 AM; first light 6:54 AM

Stars tonight? Fair

Clear 6:38 PM–6:55 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

96% lit · growing

Today: sets 5:34 AM · rises 5:07 PM
Full moon: Oct 26
New moon: Nov 9

Looking west from Hartly. The highest point on the skyline is about 5,700 ft, 47 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

Hartly, DE weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Murderkill River at Bowers Beach (IN MLLW)

Unicorn Branch near Millington

St. Jones River at Dover

Cohansey River at Greenwich (IN MLLW)

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