Observed 8:20 AM EDT at KHGR

Greencastle, PA weather

Sunny and 48°9°.

Forecasts agree

Now 48°9°

Sunny · Feels like 45°7°

Wind: 7 mph11 km/h; From the north-northeast. Up to 7 mph11 km/h through 9 PM
Dew point: 41°5°; Comfortable
UV index: 1Low; Moderate 11 AM–5 PM · peak 4
Air quality: 17Good; PM2.5 (fine particles) · tomorrow moderate
Pressure: 30.33 inHg1027 hPa; Rising · +0.06 inHg+2.0 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

7°4° warmer than this time yesterday (37°3° then, 44°7° now)

Good hours for

Above 50°10° today by 10 AM
Below 50°10° tonight after 8 PM
Drops 12°7° tomorrow night 6–9 PM (58°14° → 46°8°)
Below freezing Sunday 6–8 AM (low 32°0°)
Fog Sunday from 6 AM

This morningUp to 56°13° by 11 AM · Clear
This afternoonUp to 62°17° by 2 PM · Partly cloudy
TonightDown to 34°1° by 5 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 4 AM · Clear
Sunday morningNear 33°1° · Clear · freezing, low 32°0°

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Fri 9a	Sunny	47°8° (likely 45°7° to 48°9°)	44°7°	0%	6 mph10 km/h from N, gusts 6 mph9 km/h	77%	0%	1
Fri 10a	Sunny	51°11° (likely 51°11° to 54°12°)	51°11°	0%	7 mph11 km/h from N, gusts 11 mph18 km/h	65%	1%	2
Fri 11a	Sunny	56°13° (likely 56°13° to 58°14°)	56°13°	0%	7 mph11 km/h from NE, gusts 12 mph20 km/h	55%	10%	3
Fri 12p	Sunny	58°14° (likely 58°14° to 60°16°)	58°14°	0%	7 mph11 km/h from NE, gusts 10 mph15 km/h	49%	17%	4
Fri 1p	Mostly sunny	60°16° (likely 59°15° to 62°17°)	60°16°	0%	6 mph10 km/h from NE, gusts 8 mph13 km/h	44%	27%	4
Fri 2p	Mostly sunny	62°17° (likely 60°16° to 62°17°)	62°17°	0%	5 mph8 km/h from NE, gusts 8 mph12 km/h	39%	28%	4
Fri 3p	Mostly sunny	62°17° (likely 60°16° to 63°17°)	62°17°	0%	5 mph8 km/h from NE, gusts 8 mph13 km/h	38%	36%	4
Fri 4p	Sunny	61°16° (likely 60°16° to 62°17°)	61°16°	0%	5 mph8 km/h from NE, gusts 8 mph13 km/h	38%	35%	3
Fri 5p	Sunny	60°16° (likely 60°16° to 61°16°)	60°16°	0%	5 mph8 km/h from E, gusts 7 mph11 km/h	39%	42%	2
Fri 6p	Clear	56°13° (likely 56°13° to 59°15°)	56°13°	0%	5 mph8 km/h from E, gusts 7 mph11 km/h	47%	34%	0
Fri 7p	Clear	53°12° (likely 52°11° to 54°12°)	53°12°	0%	3 mph5 km/h from E, gusts 6 mph10 km/h	54%	6%	0
Fri 8p	Clear	49°9° (likely 47°8° to 52°11°)	48°9°	0%	3 mph5 km/h from E, gusts 9 mph15 km/h	66%	11%	0
Fri 9p	Clear	46°8° (likely 45°7° to 50°10°)	46°8°	0%	2 mph3 km/h from E, gusts 9 mph14 km/h	83%	25%	0
Fri 10p	Mostly clear	43°6° (likely 42°6° to 49°9°)	43°6°	0%	2 mph3 km/h from NE, gusts 9 mph14 km/h	89%	36%	0
Fri 11p	Mostly clear	41°5° (likely 41°5° to 47°8°)	41°5°	0%	1 mph2 km/h from NE, gusts 6 mph9 km/h	92%	53%	0
Sat 12a	Mostly clear	39°4° (likely 39°4° to 45°7°)	39°4°	0%	1 mph2 km/h from E, gusts 4 mph7 km/h	96%	59%	0
Sat 1a	Fog	38°3° (likely 38°3° to 45°7°)	38°3°	0%	1 mph2 km/h from E, gusts 5 mph9 km/h	96%	58%	0
Sat 2a	Fog	37°3° (likely 37°3° to 44°7°)	37°3°	0%	1 mph2 km/h from E, gusts 5 mph8 km/h	100%	39%	0
Sat 3a	Clear	36°2° (likely 36°2° to 42°6°)	36°2°	0%	0 mph0 km/h, gusts 4 mph6 km/h	100%	11%	0
Sat 4a	Clear	35°2° (likely 35°2° to 41°5°)	35°2°	0%	0 mph0 km/h, gusts 3 mph4 km/h	100%	10%	0
Sat 5a	Clear	34°1° (likely 34°1° to 40°4°)	34°1°	0%	0 mph0 km/h, gusts 4 mph6 km/h	100%	11%	0
Sat 6a	Clear	34°1° (likely 34°1° to 39°4°)	34°1°	0%	0 mph0 km/h, gusts 5 mph7 km/h	100%	13%	0
Sat 7a	Clear	34°1° (likely 34°1° to 38°3°)	34°1°	0%	0 mph0 km/h, gusts 5 mph9 km/h	100%	14%	0
Sat 8a	Sunny	33°1° (likely 33°1° to 38°3°)	33°1°	0%	0 mph0 km/h, gusts 5 mph8 km/h	100%	13%	0
Sat 9a	Sunny	38°3° (likely 38°3° to 43°6°)	38°3°	0%	1 mph2 km/h from NE, gusts 4 mph6 km/h	100%	7%	1
Sat 10a	Sunny	48°9° (likely 48°9° to 49°9°)	48°9°	0%	0 mph0 km/h, gusts 6 mph10 km/h	77%	2%	2
Sat 11a	Sunny	54°12° (likely 53°12° to 54°12°)	54°12°	0%	0 mph0 km/h, gusts 6 mph10 km/h	64%	4%	3
Sat 12p	Sunny	57°14° (likely 56°13° to 57°14°)	57°14°	0%	1 mph2 km/h from S, gusts 6 mph10 km/h	55%	5%	4
Sat 1p	Sunny	59°15° (likely 58°14° to 59°15°)	59°15°	0%	2 mph3 km/h from S, gusts 8 mph13 km/h	47%	4%	4
Sat 2p	Sunny	61°16° (likely 59°15° to 61°16°)	61°16°	0%	2 mph3 km/h from S, gusts 8 mph13 km/h	44%	2%	4
Sat 3p	Sunny	61°16° (likely 60°16° to 61°16°)	61°16°	0%	2 mph3 km/h from S, gusts 8 mph13 km/h	42%	2%	4
Sat 4p	Sunny	62°17° (likely 60°16° to 62°17°)	62°17°	0%	2 mph3 km/h from S, gusts 8 mph13 km/h	39%	4%	3
Sat 5p	Sunny	60°16° (likely 59°15° to 60°16°)	60°16°	0%	3 mph5 km/h from SE, gusts 8 mph14 km/h	39%	6%	1
Sat 6p	Clear	58°14° (likely 54°12° to 58°14°)	58°14°	0%	2 mph3 km/h from SE, gusts 8 mph13 km/h	44%	2%	0
Sat 7p	Clear	54°12° (likely 50°10° to 54°12°)	54°12°	0%	1 mph2 km/h from SE, gusts 8 mph13 km/h	52%	2%	0
Sat 8p	Clear	46°8° (likely 46°8° to 50°10°)	46°8°	0%	1 mph2 km/h from E, gusts 8 mph13 km/h	71%	1%	0
Sat 9p	Clear	43°6° (likely 43°6° to 49°9°)	43°6°	0%	1 mph2 km/h from E, gusts 8 mph13 km/h	82%	1%	0
Sat 10p	Clear	41°5° (likely 41°5° to 47°8°)	41°5°	0%	1 mph2 km/h from E, gusts 8 mph12 km/h	89%	1%	0
Sat 11p	Clear	40°4° (likely 40°4° to 46°8°)	40°4°	0%	0 mph0 km/h, gusts 8 mph13 km/h	89%	5%	0
Sun 12a	Clear	39°4° (likely 38°3° to 45°7°)	39°4°	0%	0 mph0 km/h, gusts 7 mph12 km/h	92%	6%	0
Sun 1a	Clear	37°3° (likely 37°3° to 44°7°)	37°3°	0%	0 mph0 km/h, gusts 5 mph8 km/h	96%	3%	0
Sun 2a	Clear	36°2° (likely 35°2° to 42°6°)	36°2°	0%	0 mph0 km/h, gusts 3 mph4 km/h	100%	2%	0
Sun 3a	Clear	35°2° (likely 32°0° to 42°6°)	35°2°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	0%	0
Sun 4a	Clear	34°1° (likely 31°−1° to 41°5°)	34°1°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	0%	0
Sun 5a	Clear	34°1° (likely 30°−1° to 41°5°)	34°1°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	5%	0
Sun 6a	Fog	32°0° (likely 30°−1° to 41°5°)	32°0°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	12%	0
Sun 7a	Fog	32°0° (likely 29°−2° to 40°4°)	32°0°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	15%	0
Sun 8a	Fog	33°1° (likely 29°−2° to 41°5°)	33°1°	0%	0 mph0 km/h, gusts 3 mph4 km/h	100%	16%	0

Days ahead

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

Today, Oct 23. Mostly sunny. High 63°17°, low 33°1°. Typical 63°17° / 42°6°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 56°13°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 62°17°
  Dry
3. Evening
  6 PM–midnight
  Clear, 49°9°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 34°1°
  Dry
Official NWS forecast
Today: Sunny, with a high near 63. Northeast wind around 7 mph.
Tonight: Areas of frost and patchy fog after 1am. Mostly clear, with a low around 33. Northeast wind 0 to 5 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
60°16°–63°17°
Low, likely
33°1°–44°7°
Typical high / low
63°17° / 42°6°
Wind
8 mph13 km/h, gusts 18 mph28 km/h
UV peak
4
Tomorrow, Oct 24. Fog. High 62°17°, low 32°0°. Typical 62°17° / 41°5°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 33°1°
  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: Areas of frost and patchy fog before 9am. Sunny, with a high near 62. Southeast wind 0 to 3 mph.
Night: Patchy frost between 2am and 3am, then patchy frost and patchy fog. Clear, with a low around 32. East wind around 2 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
60°16°–62°17°
Low, likely
32°0°–38°3°
Typical high / low
62°17° / 41°5°
Wind
8 mph13 km/h
UV peak
4
Sunday, Oct 25. Fog. High 64°18°, low 34°1°. Typical 62°17° / 41°5°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 33°1°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 62°17°
  Dry
3. Evening
  6 PM–midnight
  Clear, 49°10°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 38°4°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Areas of frost and patchy fog before 9am. Sunny, with a high near 64. West wind 0 to 3 mph.
Night: Mostly clear, with a low around 34.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
61°16°–64°18°
Low, likely
31°−1°–39°4°
Typical high / low
62°17° / 41°5°
Wind
8 mph12 km/h, gusts 13 mph21 km/h
UV peak
4
Monday, Oct 26. Sunny. High 70°21°, low 43°6°. Typical 62°17° / 41°5°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 37°3°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 55°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 70.
Night: Mostly clear, with a low around 43.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
67°19°–70°21°
Low, likely
33°1°–43°6°
Typical high / low
62°17° / 41°5°
Wind
7 mph11 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 66°19°, low 40°4°. Typical 61°16° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 45°7°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 67°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 54°12°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 45°7°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 66.
Night: Partly cloudy, with a low around 40.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
65°18°–69°21°
Low, likely
40°4°–47°8°
Typical high / low
61°16° / 40°4°
Wind
7 mph12 km/h, gusts 12 mph20 km/h
UV peak
4
Wednesday, Oct 28. Mostly cloudy. High 63°17°, low 42°6°. Typical 61°16° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 46°8°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 62°17°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 50°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 63.
Night: Mostly cloudy, with a low around 42.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
61°16°–64°18°
Low, likely
40°4°–49°9°
Typical high / low
61°16° / 40°4°
Wind
9 mph15 km/h, gusts 15 mph25 km/h
UV peak
2
Thursday, Oct 29. Partly sunny. High 67°19°, low 43°6°. Typical 60°16° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 67°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 47°8°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 67.
Night: Partly cloudy, with a low around 43.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
65°18°–71°22°
Low, likely
43°6°–51°11°
Typical high / low
60°16° / 40°4°
Wind
10 mph16 km/h, gusts 21 mph33 km/h
UV peak
4
Friday, Oct 30. Mostly sunny. High 69°21°, low 47°8°. Typical 60°16° / 39°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 46°8°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 46°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°–72°22°
Low, likely
42°6°–48°9°
Typical high / low
60°16° / 39°4°
Wind
9 mph15 km/h, gusts 22 mph35 km/h
UV peak
4
Saturday, Oct 31. Sunny. High 61°16°, low 45°7°. Typical 60°16° / 39°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 45°7°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 59°15°
  Dry
3. Evening
  6 PM–midnight
  Clear, 50°10°
  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°–68°20°
Low, likely
37°3°–53°12°
Typical high / low
60°16° / 39°4°
Wind
8 mph13 km/h, gusts 20 mph32 km/h
UV peak
2
Sunday, Nov 1. Rain. High 61°16°, low 47°8°. Typical 59°15° / 38°3°. Rain 0.45 in11 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Rain, 40°5°
  20% chance · 0.14 in3.6 mm
2. Afternoon
  noon–6 PM
  Rain, 56°13°
  30% chance · 0.14 in3.4 mm
3. Evening
  6 PM–midnight
  Rain, 51°10°
  30% chance · 0.13 in3.3 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°–67°19°
Low, likely
35°2°–55°13°
Typical high / low
59°15° / 38°3°
Wind
8 mph12 km/h, gusts 19 mph31 km/h

10 days15 days30 days

The outlook

Today
Dry, high 63°, low 33°.
Tomorrow
Dry, high 62°, low 32°.
Sunday
Dry, high 64°, low 34°.
Rest of week
Mostly dry, highs 61–70°.

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

Conococheague Creek at Fairview

7.3 mi

Below flood stage

Level: 1.7 ft
Flow: 168 cfs

Forecast peak 1.7 ft Fri 2 PM

Reading from Fri 6:45 AM · NWS gauge page

Antietam Creek near Sharpsburg

24 mi

Below flood stage

Level: 2.4 ft
Flow: 105 cfs

Forecast peak 2.3 ft Fri 2 PM

Reading from Fri 7:15 AM · NWS gauge page

Potomac River at Hancock

25 mi

Below flood stage

Level: 3.9 ft
Flow: 1,630 cfs

Forecast peak 3.9 ft Fri 2 PM

Reading from Fri 7:15 AM · NWS gauge page

Potomac River at Shepherdstown

25 mi

Below flood stage

Level: 2.5 ft
Flow: 2,150 cfs

Forecast peak 2.5 ft Fri 2 PM

Reading from Fri 7:30 AM · NWS gauge page

For your home

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

Heating this week

About 62% less heating than a typical week.

This week 37Typical 97

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 22 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 41°F).

Open the windows?

Today, 1:00 PM–5:00 PM

Good stretch to open the windows.

Is this typical?

Hagerstown 1e · official normals 1991–2020 · records 1899–2026

Oct 23, today vs a typical year

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

Last 7 days vs normal

On average 5°3° colder than normal (daily mean temperature).

−5°−3°SatOct 17
−7°−4°SunOct 18
−4°−2°MonOct 19
−2°−1°TueOct 20
−3°−2°WedOct 21
—ThuOct 22
—FriOct 23

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

Sun & moon

Sun

Daylight: 10 h 50 min; Losing 2 min 25 s a day; shortest Dec 21, 1 h 29 min less
Golden hour: 5:42–6:36 PM; Morning 7:12–8:07 AM
Blue hour: 6:36–6:47 PM; Morning 7:02–7:12 AM; first light 7:02 AM

Stars tonight? Good

Mostly clear 3–7:03 AM; moon 95% lit, sets 5:43 AM.

Moon

Waxing gibbous

92% lit · growing

Today: sets 4:34 AM · rises 4:51 PM
Full moon: Oct 26
New moon: Nov 9

Looking northwest from Greencastle. The highest point on the skyline is about 2,500 ft, 16 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

Greencastle, PA weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Sunday

Rest of week

What changed since yesterday

Radar

Rivers

Conococheague Creek at Fairview

Antietam Creek near Sharpsburg

Potomac River at Hancock

Potomac River at Shepherdstown

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? Good

Moon