Freeze Watch
Starts in 13 h 25 min
When
From late tonight through Saturday morning.
Where
Lancaster and Lebanon Counties.
Issued for this forecast zone · National Weather Service State College PA
What, impacts and precautionsHide details
What
Sub-freezing temperatures as low as 30 possible.
Impacts
Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.
Precautionary actions
Those with agricultural interests should protect sensitive vegetation.
Areas: Lebanon; Lancaster
See it on weather.gov (opens in a new tab)

Observed 9:56 AM EDT at KMDT

Annville, PA weather

Mostly sunny and 54°12°.

Forecasts agree

Now 54°12°

Mostly sunny

Wind: 6 mph9 km/h; From the northeast. Up to 7 mph11 km/h through 10 PM
Dew point: 41°5°; Comfortable
UV index: 3Moderate; Moderate 11 AM–4 PM · peak 4
Pressure: 30.36 inHg1028 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

High 61°16° today at 2 PM
Below 50°10° tonight after 8 PM
Low 33°1° tonight at 4 AM
Above 50°10° tomorrow by 11 AM
Drops 12°7° tomorrow night 6–9 PM (58°14° → 46°8°)

This morningNear 54°12° · Clear
This afternoonUp to 61°16° by 2 PM · Clear
TonightDown to 33°1° by 4 AM · Partly cloudy
Tomorrow morningUp to 54°12° by 11 AM · Clear
Tomorrow afternoonUp to 62°17° by 4 PM · Clear
Tomorrow nightDown to 34°1° by 5 AM · Clear
Sunday morningUp to 39°4° by 9 AM · freezing, low 32°0° · Clear

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Fri 10a	Sunny	52°11° (likely 52°11° to 54°12°)	52°11°	0%	6 mph10 km/h from NE, gusts 10 mph17 km/h	63%	9%	2
Fri 11a	Sunny	55°13° (likely 55°13° to 56°13°)	55°13°	0%	7 mph11 km/h from NE, gusts 14 mph22 km/h	55%	3%	3
Fri 12p	Sunny	57°14° (likely 57°14° to 58°14°)	57°14°	0%	7 mph11 km/h from NE, gusts 13 mph21 km/h	49%	6%	4
Fri 1p	Sunny	59°15° (likely 58°14° to 59°15°)	59°15°	0%	6 mph10 km/h from NE, gusts 11 mph18 km/h	44%	6%	4
Fri 2p	Sunny	61°16° (likely 59°15° to 61°16°)	61°16°	0%	5 mph8 km/h from NE, gusts 10 mph16 km/h	38%	4%	4
Fri 3p	Sunny	61°16° (likely 59°15° to 61°16°)	61°16°	0%	5 mph8 km/h from NE, gusts 9 mph15 km/h	36%	4%	3
Fri 4p	Sunny	61°16° (likely 59°15° to 61°16°)	61°16°	0%	5 mph8 km/h from E, gusts 9 mph14 km/h	36%	7%	2
Fri 5p	Mostly sunny	60°16° (likely 58°14° to 60°16°)	60°16°	0%	3 mph5 km/h from E, gusts 9 mph14 km/h	37%	25%	1
Fri 6p	Mostly clear	55°13° (likely 54°12° to 56°13°)	55°13°	0%	2 mph3 km/h from E, gusts 7 mph12 km/h	47%	49%	0
Fri 7p	Mostly clear	51°11° (likely 51°11° to 51°11°)	51°11°	0%	1 mph2 km/h from E, gusts 6 mph10 km/h	56%	54%	0
Fri 8p	Partly cloudy	47°8° (likely 47°8° to 49°9°)	47°8°	0%	1 mph2 km/h from E, gusts 6 mph10 km/h	68%	69%	0
Fri 9p	Cloudy	44°7° (likely 44°7° to 47°8°)	44°7°	0%	1 mph2 km/h from E, gusts 5 mph8 km/h	76%	68%	0
Fri 10p	Cloudy	42°6° (likely 42°6° to 46°8°)	42°6°	0%	1 mph2 km/h from E, gusts 5 mph8 km/h	82%	64%	0
Fri 11p	Clear	40°4° (likely 40°4° to 44°7°)	40°4°	0%	1 mph2 km/h from E, gusts 5 mph9 km/h	89%	42%	0
Sat 12a	Clear	38°3° (likely 38°3° to 43°6°)	38°3°	0%	1 mph2 km/h from E, gusts 5 mph7 km/h	96%	41%	0
Sat 1a	Clear	36°2° (likely 36°2° to 42°6°)	36°2°	0%	1 mph2 km/h from E, gusts 4 mph6 km/h	100%	36%	0
Sat 2a	Clear	35°2° (likely 35°2° to 41°5°)	35°2°	0%	1 mph2 km/h from NE, gusts 4 mph7 km/h	100%	41%	0
Sat 3a	Clear	35°2° (likely 35°2° to 40°4°)	35°2°	0%	1 mph2 km/h from NE, gusts 4 mph6 km/h	96%	43%	0
Sat 4a	Clear	33°1° (likely 33°1° to 39°4°)	33°1°	0%	1 mph2 km/h from NE, gusts 4 mph6 km/h	100%	10%	0
Sat 5a	Clear	35°2° (likely 35°2° to 39°4°)	35°2°	0%	1 mph2 km/h from NE, gusts 4 mph6 km/h	92%	9%	0
Sat 6a	Mostly clear	35°2° (likely 35°2° to 38°3°)	35°2°	0%	1 mph2 km/h from NE, gusts 4 mph6 km/h	89%	9%	0
Sat 7a	Sunny	35°2° (likely 35°2° to 37°3°)	35°2°	0%	1 mph2 km/h from NE, gusts 3 mph5 km/h	89%	13%	0
Sat 8a	Sunny	36°2° (likely 36°2° to 37°3°)	36°2°	0%	1 mph2 km/h from NE, gusts 3 mph6 km/h	92%	10%	0
Sat 9a	Sunny	43°6° (likely 39°4° to 43°6°)	43°6°	0%	1 mph2 km/h from NE, gusts 4 mph7 km/h	82%	9%	1
Sat 10a	Sunny	49°9° (likely 47°8° to 49°9°)	49°9°	0%	0 mph0 km/h, gusts 4 mph6 km/h	68%	2%	2
Sat 11a	Sunny	54°12° (likely 52°11° to 54°12°)	54°12°	0%	0 mph0 km/h, gusts 6 mph10 km/h	59%	1%	3
Sat 12p	Sunny	57°14° (likely 55°13° to 57°14°)	57°14°	0%	1 mph2 km/h from SE, gusts 6 mph9 km/h	53%	2%	4
Sat 1p	Sunny	60°16° (likely 57°14° to 60°16°)	60°16°	0%	2 mph3 km/h from SE, gusts 6 mph9 km/h	47%	2%	4
Sat 2p	Sunny	60°16° (likely 58°14° to 60°16°)	60°16°	0%	2 mph3 km/h from S, gusts 6 mph10 km/h	46%	1%	4
Sat 3p	Sunny	61°16° (likely 59°15° to 61°16°)	61°16°	0%	2 mph3 km/h from S, gusts 5 mph8 km/h	42%	2%	3
Sat 4p	Sunny	62°17° (likely 59°15° to 62°17°)	62°17°	0%	1 mph2 km/h from SE, gusts 5 mph8 km/h	39%	10%	2
Sat 5p	Sunny	60°16° (likely 58°14° to 60°16°)	60°16°	0%	2 mph3 km/h from SE, gusts 5 mph8 km/h	44%	1%	1
Sat 6p	Clear	58°14° (likely 53°12° to 58°14°)	58°14°	0%	1 mph2 km/h from SE, gusts 5 mph8 km/h	49%	0%	0
Sat 7p	Clear	53°12° (likely 50°10° to 53°12°)	53°12°	0%	1 mph2 km/h from E, gusts 4 mph7 km/h	59%	0%	0
Sat 8p	Clear	46°8° (likely 46°8° to 50°10°)	46°8°	0%	0 mph0 km/h, gusts 6 mph10 km/h	76%	0%	0
Sat 9p	Clear	43°6° (likely 43°6° to 48°9°)	43°6°	0%	0 mph0 km/h, gusts 6 mph10 km/h	82%	0%	0
Sat 10p	Clear	41°5° (likely 41°5° to 46°8°)	41°5°	0%	0 mph0 km/h, gusts 6 mph9 km/h	85%	0%	0
Sat 11p	Clear	39°4° (likely 39°4° to 45°7°)	39°4°	0%	0 mph0 km/h, gusts 5 mph7 km/h	92%	0%	0
Sun 12a	Clear	38°3° (likely 38°3° to 43°6°)	38°3°	0%	0 mph0 km/h, gusts 4 mph6 km/h	96%	0%	0
Sun 1a	Clear	37°3° (likely 37°3° to 42°6°)	37°3°	0%	0 mph0 km/h, gusts 2 mph4 km/h	96%	0%	0
Sun 2a	Clear	36°2° (likely 36°2° to 41°5°)	36°2°	0%	0 mph0 km/h, gusts 2 mph3 km/h	100%	0%	0
Sun 3a	Clear	35°2° (likely 34°1° to 40°4°)	35°2°	0%	0 mph0 km/h, gusts 2 mph3 km/h	100%	0%	0
Sun 4a	Clear	35°2° (likely 33°1° to 39°4°)	35°2°	0%	0 mph0 km/h, gusts 3 mph4 km/h	96%	0%	0
Sun 5a	Clear	34°1° (likely 32°0° to 38°3°)	34°1°	0%	0 mph0 km/h, gusts 3 mph4 km/h	100%	0%	0
Sun 6a	Clear	33°1° (likely 31°−1° to 37°3°)	33°1°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	1%	0
Sun 7a	Sunny	32°0° (likely 31°−1° to 37°3°)	32°0°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	1%	0
Sun 8a	Sunny	33°1° (likely 30°−1° to 38°3°)	33°1°	0%	0 mph0 km/h, gusts 2 mph3 km/h	100%	0%	0
Sun 9a	Sunny	39°4° (likely 32°0° to 45°7°)	39°4°	0%	0 mph0 km/h, gusts 1 mph1 km/h	96%	2%	1

Days ahead

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

Today, Oct 23. Sunny. High 62°17°, low 33°1°. Typical 62°17° / 41°5°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 55°13°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 61°16°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 47°8°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 33°1°
  Dry
Official NWS forecast
Today: Sunny, with a high near 62. Northeast wind 3 to 7 mph.
Tonight: Widespread frost after 1am. Mostly clear, with a low around 33. East wind around 2 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
59°15°–62°17°
Low, likely
33°1°–43°6°
Typical high / low
62°17° / 41°5°
Wind
10 mph15 km/h, gusts 18 mph29 km/h
UV peak
4
Tomorrow, Oct 24. Mostly sunny. High 62°17°, low 32°0°. Typical 61°16° / 41°5°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 36°2°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 62°17°
  Dry
3. Evening
  6 PM–midnight
  Clear, 46°8°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 34°1°
  Dry
Official NWS forecast
Day: Widespread frost before 9am. Sunny, with a high near 62. Southeast wind around 2 mph.
Night: Areas of frost after 1am. Clear, with a low around 32. East wind around 1 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
59°15°–62°17°
Low, likely
32°0°–37°3°
Typical high / low
61°16° / 41°5°
Wind
6 mph10 km/h, gusts 11 mph18 km/h
UV peak
4
Sunday, Oct 25. Sunny. High 64°18°, low 34°1°. Typical 61°16° / 41°5°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 33°1°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 61°16°
  Dry
3. Evening
  6 PM–midnight
  Clear, 48°9°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 37°3°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Areas of frost before 7am, then patchy frost and patchy fog between 7am and 9am. Sunny, with a high near 64. West wind 0 to 3 mph.
Night: Clear, with a low around 34.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
61°16°–64°18°
Low, likely
30°−1°–37°3°
Typical high / low
61°16° / 41°5°
Wind
6 mph9 km/h
UV peak
4
Monday, Oct 26. Sunny. High 69°21°, low 44°7°. Typical 60°16° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 37°3°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 54°12°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 47°8°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 69.
Night: Mostly clear, with a low around 44.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
65°18°–69°21°
Low, likely
32°0°–44°7°
Typical high / low
60°16° / 40°4°
Wind
9 mph14 km/h, gusts 17 mph27 km/h
UV peak
4
Tuesday, Oct 27. Cloudy. High 65°18°, low 39°4°. Typical 60°16° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 46°8°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 52°11°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 43°6°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 65.
Night: Partly cloudy, with a low around 39.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
61°16°–66°19°
Low, likely
39°4°–48°9°
Typical high / low
60°16° / 40°4°
Wind
8 mph13 km/h, gusts 16 mph26 km/h
UV peak
4
Wednesday, Oct 28. Mostly cloudy. High 61°16°, low 41°5°. Typical 60°16° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 43°6°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 60°15°
  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: Partly sunny, with a high near 61.
Night: Mostly cloudy, with a low around 41.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
58°14°–62°17°
Low, likely
38°3°–46°8°
Typical high / low
60°16° / 40°4°
Wind
10 mph16 km/h, gusts 16 mph26 km/h
UV peak
2
Thursday, Oct 29. Mostly cloudy. High 66°19°, low 43°6°. Typical 59°15° / 39°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 46°8°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Mostly 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: Partly sunny, with a high near 66.
Night: Partly cloudy, with a low around 43.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
63°17°–69°21°
Low, likely
41°5°–49°9°
Typical high / low
59°15° / 39°4°
Wind
11 mph17 km/h, gusts 25 mph40 km/h
UV peak
3
Friday, Oct 30. Cloudy. High 67°19°, low 47°8°. Typical 59°15° / 39°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 46°8°
  Dry
2. Afternoon
  noon–6 PM
  Mostly 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.
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°–70°21°
Low, likely
43°6°–49°9°
Typical high / low
59°15° / 39°4°
Wind
8 mph13 km/h, gusts 20 mph32 km/h
UV peak
4
Saturday, Oct 31. Sunny. High 59°15°, low 45°7°. Typical 58°14° / 39°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 57°14°
  Dry
3. Evening
  6 PM–midnight
  Clear, 48°9°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 40°5°
  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
54°12°–66°19°
Low, likely
37°3°–53°12°
Typical high / low
58°14° / 39°4°
Wind
10 mph16 km/h, gusts 24 mph39 km/h
UV peak
2
Sunday, Nov 1. Showers. High 61°16°, low 46°8°. Typical 58°14° / 38°3°. Rain 0.51 in13 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 40°4°
  20% chance · 0.1 in2.6 mm
2. Afternoon
  noon–6 PM
  Rain, 56°13°
  30% chance · 0.18 in4.5 mm
3. Evening
  6 PM–midnight
  Rain, 51°11°
  30% chance · 0.2 in5.1 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.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
58°14°–65°18°
Low, likely
35°2°–54°12°
Typical high / low
58°14° / 38°3°
Wind
11 mph18 km/h, gusts 26 mph41 km/h

10 days15 days30 days

The outlook

Today
Dry, high 62°, low 33°.
Tomorrow
Dry, high 62°, low 32°.
Sunday
Dry, high 64°, low 34°.
Rest of week
Mostly dry, highs 59–69°.

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

Swatara Creek at Harper Tavern

6.1 mi

Below flood stage

Level: 0.8 ft
Flow: 232 cfs

Forecast peak 0.7 ft Fri 2 PM

Reading from Fri 9:15 AM · NWS gauge page

Swatara Creek near Hershey

8.8 mi

Below flood stage

Level: 1.9 ft
Flow: 341 cfs

Forecast peak 1.9 ft Fri 2 PM

Reading from Fri 8:45 AM · NWS gauge page

Swatara Creek at Middletown

15 mi

Below flood stage

Level: 2.3 ft

Forecast peak 2.3 ft Fri 2 PM

Reading from Fri 9:15 AM · NWS gauge page

Quittapahilla Creek near Bellegrove

2.9 mi

Level: 3.4 ft
Flow: 76 cfs

Reading from Fri 9:15 AM · 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 38Typical 103

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 28
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 23 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 41°F).

Open the windows?

Today, 2:00 PM–5:00 PM

Good stretch to open the windows (air quality forecast not available for part of this window).

Is this typical?

LEBANON 2 W · official normals 1991–2020 · records 1965–2026

Oct 23, today vs a typical year

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

Last 7 days vs normal

—SatOct 17
—SunOct 18
—MonOct 19
—TueOct 20
—WedOct 21
—ThuOct 22
—FriOct 23

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

Sun & moon

Sun

Daylight: 10 h 49 min; Losing 2 min 35 s a day; shortest Dec 21, 1 h 31 min less
Golden hour: 5:36–6:31 PM; Morning 7:08–8:03 AM
Blue hour: 6:31–6:42 PM; Morning 6:57–7:08 AM; first light 6:57 AM

Stars tonight? Fair

Mostly clear 4–6:58 AM, but the moon is 95% lit and up.

Moon

Waxing gibbous

92% lit · growing

Today: sets 4:29 AM · rises 4:45 PM
Full moon: Oct 26
New moon: Nov 9

Looking northwest from Annville. The highest point on the skyline is about 1,600 ft, 15 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 Watch

Annville, PA weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Sunday

Rest of week

What changed since yesterday

Radar

Rivers

Swatara Creek at Harper Tavern

Swatara Creek near Hershey

Swatara Creek at Middletown

Quittapahilla Creek near Bellegrove

For your home

Heating this week

Heat-pump hours, next 7 days

Comfort

Open the windows?

Is this typical?

Oct 23, today vs a typical year

Last 7 days vs normal

Sun & moon

Sun

Stars tonight? Fair

Moon