Freeze Warning
Ends in 6 h 21 min
When
Until 9 AM EDT Saturday.
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
Freezing conditions could kill crops and other sensitive vegetation.
Precautionary actions
Take steps to protect tender plants and vegetation from the cold if you wish to extend the growing season.
Areas: Lebanon; Lancaster
See it on weather.gov (opens in a new tab)

Observed 1:35 AM EDT at KLNS

East Petersburg, PA weather

Freeze Warning. 37°3° and clear now.

Forecasts agree

Now 37°3°

Clear

Wind: 3 mph5 km/h; From the east. Light through 2 PM
Dew point: 36°2°; Comfortable
Humidity: 93%; Air 37°3°, dew point 36°2° · fog or dew likely
UV index: 0Low; Moderate 11 AM–4 PM · peak 4
Air quality: 76Moderate; Main pollutant: PM2.5 (fine particles)
Pressure: 30.48 inHg1032 hPa; Rising slowly · +0.02 inHg+0.6 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

Low 35°2° today at 6 AM
Above 50°10° today by 11 AM
High 63°17° today at 4 PM
Below 50°10° tonight after 8 PM

TonightNear 37°3° · Clear
This morningUp to 54°12° by 11 AM · Clear
This afternoonUp to 63°17° by 4 PM · Clear
TonightDown to 36°2° by 5 AM · Clear
Tomorrow morningUp to 54°12° by 11 AM · Clear
Tomorrow afternoonUp to 65°18° by 4 PM · Clear
Tomorrow nightDown to 42°6° by 1 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 2a	Clear	38°3° (likely 37°3° to 43°6°)	38°3°	0%	0 mph0 km/h, gusts 2 mph4 km/h	92%	6%	0
Sat 3a	Clear	37°3° (likely 37°3° to 41°5°)	37°3°	0%	0 mph0 km/h, gusts 3 mph5 km/h	96%	10%	0
Sat 4a	Clear	37°3° (likely 36°2° to 40°4°)	37°3°	0%	0 mph0 km/h, gusts 4 mph6 km/h	92%	10%	0
Sat 5a	Clear	36°2° (likely 36°2° to 39°4°)	36°2°	0%	1 mph2 km/h from NE, gusts 4 mph6 km/h	96%	23%	0
Sat 6a	Clear	35°2° (likely 35°2° to 38°3°)	35°2°	0%	0 mph0 km/h, gusts 4 mph6 km/h	96%	28%	0
Sat 7a	Sunny	35°2° (likely 35°2° to 37°3°)	35°2°	0%	0 mph0 km/h, gusts 3 mph5 km/h	96%	24%	0
Sat 8a	Sunny	36°2° (likely 35°2° to 38°3°)	36°2°	0%	0 mph0 km/h, gusts 3 mph5 km/h	92%	11%	0
Sat 9a	Sunny	41°5° (likely 40°4° to 42°6°)	41°5°	0%	0 mph0 km/h, gusts 4 mph7 km/h	89%	2%	1
Sat 10a	Sunny	49°9° (likely 47°8° to 49°9°)	49°9°	0%	0 mph0 km/h, gusts 5 mph8 km/h	68%	0%	2
Sat 11a	Sunny	54°12° (likely 52°11° to 55°13°)	54°12°	0%	0 mph0 km/h, gusts 4 mph6 km/h	59%	0%	3
Sat 12p	Sunny	57°14° (likely 55°13° to 58°14°)	57°14°	0%	0 mph0 km/h, gusts 4 mph6 km/h	51%	0%	4
Sat 1p	Sunny	60°16° (likely 57°14° to 60°16°)	60°16°	0%	1 mph2 km/h from SE, gusts 4 mph7 km/h	42%	0%	4
Sat 2p	Sunny	61°16° (likely 59°15° to 61°16°)	61°16°	0%	1 mph2 km/h from SE, gusts 4 mph6 km/h	39%	0%	4
Sat 3p	Sunny	61°16° (likely 59°15° to 61°16°)	61°16°	0%	0 mph0 km/h, gusts 3 mph6 km/h	39%	0%	3
Sat 4p	Sunny	63°17° (likely 59°15° to 63°17°)	63°17°	0%	0 mph0 km/h, gusts 3 mph5 km/h	36%	0%	2
Sat 5p	Sunny	61°16° (likely 58°14° to 61°16°)	61°16°	0%	1 mph2 km/h from SE, gusts 3 mph5 km/h	39%	0%	1
Sat 6p	Clear	58°14° (likely 54°12° to 58°14°)	58°14°	0%	1 mph2 km/h from E, gusts 4 mph6 km/h	44%	0%	0
Sat 7p	Clear	54°12° (likely 51°11° to 54°12°)	54°12°	0%	0 mph0 km/h, gusts 5 mph8 km/h	50%	0%	0
Sat 8p	Clear	49°9° (likely 48°9° to 51°11°)	49°9°	0%	0 mph0 km/h, gusts 4 mph7 km/h	63%	0%	0
Sat 9p	Clear	47°8° (likely 46°8° to 49°9°)	47°8°	0%	0 mph0 km/h, gusts 4 mph6 km/h	68%	0%	0
Sat 10p	Clear	45°7° (likely 44°7° to 48°9°)	45°7°	0%	0 mph0 km/h, gusts 3 mph6 km/h	70%	0%	0
Sat 11p	Clear	42°6° (likely 42°6° to 46°8°)	42°6°	0%	0 mph0 km/h, gusts 3 mph5 km/h	82%	0%	0
Sun 12a	Clear	41°5° (likely 41°5° to 45°7°)	41°5°	0%	0 mph0 km/h, gusts 3 mph4 km/h	86%	0%	0
Sun 1a	Clear	40°4° (likely 40°4° to 44°7°)	40°4°	0%	0 mph0 km/h, gusts 2 mph4 km/h	89%	0%	0
Sun 2a	Clear	39°4° (likely 39°4° to 43°6°)	39°4°	0%	0 mph0 km/h, gusts 3 mph4 km/h	92%	0%	0
Sun 3a	Clear	38°3° (likely 38°3° to 42°6°)	38°3°	0%	0 mph0 km/h, gusts 3 mph5 km/h	92%	0%	0
Sun 4a	Clear	37°3° (likely 37°3° to 40°4°)	37°3°	0%	0 mph0 km/h, gusts 3 mph5 km/h	96%	0%	0
Sun 5a	Clear	36°2° (likely 36°2° to 39°4°)	36°2°	0%	0 mph0 km/h, gusts 3 mph5 km/h	96%	0%	0
Sun 6a	Clear	35°2° (likely 35°2° to 38°3°)	35°2°	0%	0 mph0 km/h, gusts 3 mph5 km/h	96%	0%	0
Sun 7a	Sunny	35°2° (likely 35°2° to 37°3°)	35°2°	0%	0 mph0 km/h, gusts 3 mph5 km/h	96%	0%	0
Sun 8a	Sunny	36°2° (likely 35°2° to 38°3°)	36°2°	0%	0 mph0 km/h, gusts 2 mph3 km/h	96%	0%	0
Sun 9a	Sunny	41°5° (likely 39°4° to 42°6°)	41°5°	0%	0 mph0 km/h, gusts 3 mph4 km/h	93%	0%	1
Sun 10a	Sunny	49°9° (likely 48°9° to 50°10°)	49°9°	0%	0 mph0 km/h, gusts 2 mph3 km/h	71%	2%	2
Sun 11a	Sunny	54°12° (likely 54°12° to 55°13°)	54°12°	0%	0 mph0 km/h, gusts 4 mph7 km/h	64%	3%	3
Sun 12p	Sunny	58°14° (likely 57°14° to 59°15°)	58°14°	0%	1 mph2 km/h from W, gusts 5 mph8 km/h	55%	2%	4
Sun 1p	Sunny	61°16° (likely 59°15° to 61°16°)	61°16°	0%	1 mph2 km/h from W, gusts 7 mph11 km/h	50%	4%	4
Sun 2p	Sunny	64°18° (likely 61°16° to 64°18°)	64°18°	0%	2 mph3 km/h from W, gusts 6 mph10 km/h	43%	10%	4
Sun 3p	Sunny	64°18° (likely 61°16° to 64°18°)	64°18°	0%	1 mph2 km/h from W, gusts 7 mph11 km/h	45%	4%	3
Sun 4p	Sunny	65°18° (likely 61°16° to 65°18°)	65°18°	0%	2 mph3 km/h from SW, gusts 7 mph10 km/h	43%	5%	2
Sun 5p	Sunny	64°18° (likely 60°16° to 64°18°)	64°18°	0%	2 mph3 km/h from SW, gusts 6 mph9 km/h	46%	3%	1
Sun 6p	Clear	61°16° (likely 57°14° to 61°16°)	61°16°	0%	0 mph0 km/h, gusts 3 mph5 km/h	50%	3%	0
Sun 7p	Clear	56°13° (likely 53°12° to 56°13°)	56°13°	0%	0 mph0 km/h, gusts 4 mph6 km/h	59%	2%	0
Sun 8p	Clear	51°11° (likely 49°9° to 52°11°)	51°11°	0%	0 mph0 km/h, gusts 5 mph8 km/h	74%	1%	0
Sun 9p	Clear	48°9° (likely 41°5° to 50°10°)	48°9°	0%	0 mph0 km/h, gusts 2 mph4 km/h	80%	0%	0
Sun 10p	Clear	46°8° (likely 39°4° to 48°9°)	46°8°	0%	0 mph0 km/h, gusts 2 mph3 km/h	86%	0%	0
Sun 11p	Clear	44°7° (likely 37°3° to 47°8°)	44°7°	0%	0 mph0 km/h, gusts 2 mph3 km/h	93%	0%	0
Mon 12a	Clear	43°6° (likely 35°2° to 46°8°)	43°6°	0%	0 mph0 km/h, gusts 2 mph3 km/h	96%	0%	0
Mon 1a	Clear	42°6° (likely 33°1° to 45°7°)	42°6°	0%	1 mph2 km/h from W, gusts 2 mph3 km/h	96%	1%	0

Days ahead

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

Today, Oct 24. Fog. High 63°17°, low 35°2°. Typical 63°17° / 41°5°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 36°2°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 63°17°
  Dry
3. Evening
  6 PM–midnight
  Clear, 49°9°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 36°2°
  Dry
Official NWS forecast
Today: Widespread frost and patchy fog before 10am. Sunny, with a high near 63. Northeast wind around 1 mph.
Tonight: Widespread frost and patchy fog. Mostly clear, with a low around 35. Northeast wind around 1 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
59°15°–63°17°
Low, likely
35°2°–37°3°
Typical high / low
63°17° / 41°5°
Wind
5 mph9 km/h
UV peak
4
Tomorrow, Oct 25. Fog. High 66°19°, low 36°2°. Typical 63°17° / 40°4°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 36°2°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 51°11°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 38°4°
  Dry
Official NWS forecast
Day: Areas of frost and areas of fog before 10am. Sunny, with a high near 66. West wind around 2 mph.
Night: Patchy fog after 11pm. Mostly clear, with a low around 36. West wind around 2 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
62°17°–66°19°
Low, likely
35°2°–37°3°
Typical high / low
63°17° / 40°4°
Wind
5 mph9 km/h
UV peak
4
Monday, Oct 26. Fog. High 69°21°, low 43°6°. Typical 63°17° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 39°4°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 54°12°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 47°8°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Patchy fog before 7am. Sunny, with a high near 69.
Night: Mostly clear, with a low around 43.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
65°18°–69°21°
Low, likely
34°1°–43°6°
Typical high / low
63°17° / 40°4°
Wind
10 mph16 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 64°18°, low 39°4°. Typical 62°17° / 40°4°. Dry. Mostly agree. Best day outdoors this week.
1. Morning
  6 AM–noon
  Sunny, 46°8°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 63°17°
  Dry
3. Evening
  6 PM–midnight
  Clear, 51°10°
  Dry
4. Overnight
  midnight–6 AM
  Mostly 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 39.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Best day outdoors this week: the one dry, mild day the forecasts agree on (high 64°18°).
High, likely
61°16°–65°18°
Low, likely
39°4°–47°8°
Typical high / low
62°17° / 40°4°
Wind
12 mph19 km/h, gusts 23 mph36 km/h
UV peak
4
Wednesday, Oct 28. Cloudy. High 63°17°, low 43°6°. Typical 62°17° / 39°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 39°4°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 60°15°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 51°10°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 45°7°
  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 43.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
57°14°–63°17°
Low, likely
38°3°–43°6°
Typical high / low
62°17° / 39°4°
Wind
7 mph12 km/h, gusts 17 mph27 km/h
UV peak
4
Thursday, Oct 29. Partly sunny. High 70°21°, low 47°8°. Typical 62°17° / 39°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 44°7°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 54°12°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 46°8°
  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.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
62°17°–70°21°
Low, likely
41°5°–47°8°
Typical high / low
62°17° / 39°4°
Wind
10 mph16 km/h, gusts 27 mph43 km/h
UV peak
4
Friday, Oct 30. Mostly sunny. High 71°22°, low 45°7°. Typical 61°16° / 39°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 45°7°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 56°13°
  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 71.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
66°19°–72°22°
Low, likely
42°6°–48°9°
Typical high / low
61°16° / 39°4°
Wind
10 mph16 km/h, gusts 22 mph35 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 68°20°, low 45°7°. Typical 61°16° / 38°3°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 44°6°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 47°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
61°16°–73°23°
Low, likely
43°6°–49°9°
Typical high / low
61°16° / 38°3°
Wind
8 mph13 km/h, gusts 21 mph34 km/h
UV peak
3
Sunday, Nov 1. Cloudy. High 65°18°, low 49°9°. Typical 60°16° / 38°3°. Rain 0.01 in0.3 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 64°18°
  20% chance
3. Evening
  6 PM–midnight
  Mostly clear, 56°13°
  20% chance
4. Overnight
  midnight–6 AM
  Cloudy, 56°13°
  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
56°13°–70°21°
Low, likely
44°7°–55°13°
Typical high / low
60°16° / 38°3°
Wind
10 mph16 km/h, gusts 23 mph37 km/h
UV peak
1
Monday, Nov 2. Drizzle. High 66°19°, low 57°14°. Typical 60°16° / 38°3°. Rain 0.22 in5.6 mm, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 59°15°
  20% chance · 0.02 in0.5 mm
2. Afternoon
  noon–6 PM
  Drizzle, 66°19°
  20% chance · 0.09 in2.3 mm
3. Evening
  6 PM–midnight
  Partly cloudy, 59°15°
  20% chance · 0.04 in1.1 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.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
64°18°–69°21°
Low, likely
54°12°–59°15°
Typical high / low
60°16° / 38°3°
Wind
18 mph29 km/h, gusts 39 mph62 km/h
UV peak
2

10 days15 days30 days

The outlook

Today
Dry, high 63°, low 35°.
Tomorrow
Dry, high 66°, low 36°, warming up.
Monday
Dry, high 69°, low 43°, warming up.
Rest of week
Mostly dry, highs 63–71°.

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

Conestoga River at Lancaster

5.3 mi

Below flood stage

Level: 3.6 ft
Flow: 266 cfs

Forecast peak 3.6 ft Sat 2 AM

Reading from Sat 12:15 AM · NWS gauge page

Susquehanna River at Marietta

10 mi

Below flood stage

Level: 34.5 ft
Flow: 14,000 cfs

Forecast peak 34.5 ft Sat 2 AM

Reading from Sat 12:30 AM · NWS gauge page

Big Spring Run near Mylin Corners

8.7 mi

Level: 3.7 ft
Flow: 1 cfs

Reading from Sat 1 AM · NWS gauge page

Chiques Creek above MARIETTA

9.2 mi

Level: 2.9 ft
Flow: 89 cfs

Reading from Sat 12:15 AM · NWS gauge page

For your home

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

Heating this week

About 66% less heating than a typical week.

This week 33Typical 98

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 24
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 19 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 36°F).

Open the windows?

Today, 1:00 PM–5:00 PM

Good stretch to open the windows.

Is this typical?

Lancaster 2 NE Filt Plant · official normals 1991–2020 · records 1949–2026

Oct 24, today vs a typical year

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

Last 7 days vs normal

—SunOct 18
—MonOct 19
—TueOct 20
—WedOct 21
—ThuOct 22
—FriOct 23
—SatOct 24

East Petersburg 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 28 min less
Golden hour: 5:35–6:29 PM; Morning 7:08–8:03 AM
Blue hour: 6:29–6:40 PM; Morning 6:58–7:08 AM; first light 6:58 AM

Stars tonight? Fair

Mostly clear 2:39–6 AM, but the moon is 96% lit and up.

Moon

Waxing gibbous

95% lit · growing

Today: sets 5:37 AM · rises 5:09 PM
Full moon: Oct 26
New moon: Nov 9

Looking north from East Petersburg. The highest point on the skyline is about 3,300 ft, 14 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