Observed 11:54 AM EDT at KRSP

Pen Mar, PA weather

Mostly cloudy and 49°9°, jacket by 6 PM.

Forecasts agree

Now 49°9°

Mostly cloudy

Wind: 7 mph11 km/h; From the northeast. Up to 7 mph11 km/h through 12 AM
Dew point: 41°5°; Comfortable
UV index: 4Moderate; Moderate until 5 PM
Air quality: 30Good; Main pollutant: Ozone

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 35°2° tomorrow at 8 AM
Above 50°10° tomorrow by 11 AM

This afternoonUp to 61°16° by 2 PM · Clear
TonightDown to 37°3° by 4 AM · Clear
Tomorrow morningUp to 53°12° by 11 AM · Clear
Tomorrow afternoonNear 58°14° · Clear
Tomorrow nightDown to 37°3° by 4 AM · Clear
Sunday morningUp to 54°12° by 11 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
Fri 12p	Partly sunny	56°13° (likely 56°13° to 57°14°)	56°13°	0%	7 mph11 km/h from NE, gusts 11 mph18 km/h	53%	35%	4
Fri 1p	Partly sunny	58°14° (likely 58°14° to 59°15°)	58°14°	0%	6 mph10 km/h from NE, gusts 10 mph15 km/h	49%	18%	4
Fri 2p	Mostly sunny	61°16° (likely 58°14° to 61°16°)	61°16°	0%	5 mph8 km/h from NE, gusts 10 mph17 km/h	42%	24%	4
Fri 3p	Mostly sunny	60°16° (likely 59°15° to 60°16°)	60°16°	0%	5 mph8 km/h from NE, gusts 10 mph16 km/h	41%	19%	4
Fri 4p	Mostly sunny	59°15° (likely 58°14° to 60°16°)	59°15°	0%	5 mph8 km/h from E, gusts 9 mph15 km/h	40%	18%	3
Fri 5p	Mostly sunny	58°14° (likely 57°14° to 59°15°)	58°14°	0%	5 mph8 km/h from E, gusts 9 mph15 km/h	40%	12%	1
Fri 6p	Clear	55°13° (likely 54°12° to 56°13°)	55°13°	0%	3 mph5 km/h from E, gusts 9 mph14 km/h	47%	7%	0
Fri 7p	Clear	51°11° (likely 50°10° to 53°12°)	51°11°	0%	3 mph5 km/h from E, gusts 8 mph14 km/h	59%	2%	0
Fri 8p	Clear	48°9° (likely 48°9° to 52°11°)	47°8°	0%	3 mph5 km/h from E, gusts 9 mph14 km/h	68%	2%	0
Fri 9p	Cloudy	44°7° (likely 44°7° to 51°11°)	42°6°	0%	3 mph5 km/h from E, gusts 10 mph15 km/h	82%	50%	0
Fri 10p	Cloudy	44°7° (likely 44°7° to 50°10°)	44°7°	0%	2 mph3 km/h from E, gusts 9 mph15 km/h	82%	59%	0
Fri 11p	Cloudy	43°6° (likely 43°6° to 50°10°)	43°6°	0%	2 mph3 km/h from E, gusts 9 mph15 km/h	82%	59%	0
Sat 12a	Mostly clear	41°5° (likely 41°5° to 49°9°)	41°5°	0%	1 mph2 km/h from E, gusts 9 mph15 km/h	89%	54%	0
Sat 1a	Clear	40°4° (likely 40°4° to 47°8°)	40°4°	0%	1 mph2 km/h from E, gusts 9 mph14 km/h	89%	29%	0
Sat 2a	Clear	40°4° (likely 40°4° to 46°8°)	40°4°	0%	0 mph0 km/h, gusts 8 mph13 km/h	89%	23%	0
Sat 3a	Clear	38°3° (likely 38°3° to 45°7°)	38°3°	0%	0 mph0 km/h, gusts 8 mph12 km/h	96%	3%	0
Sat 4a	Clear	37°3° (likely 37°3° to 44°7°)	37°3°	0%	0 mph0 km/h, gusts 7 mph12 km/h	96%	1%	0
Sat 5a	Clear	37°3° (likely 37°3° to 43°6°)	37°3°	0%	0 mph0 km/h, gusts 7 mph11 km/h	96%	0%	0
Sat 6a	Clear	37°3° (likely 37°3° to 42°6°)	37°3°	0%	0 mph0 km/h, gusts 6 mph9 km/h	96%	0%	0
Sat 7a	Sunny	36°2° (likely 36°2° to 42°6°)	36°2°	0%	0 mph0 km/h, gusts 6 mph9 km/h	96%	0%	0
Sat 8a	Sunny	35°2° (likely 35°2° to 43°6°)	35°2°	0%	0 mph0 km/h, gusts 6 mph10 km/h	100%	0%	0
Sat 9a	Sunny	40°4° (likely 40°4° to 47°8°)	40°4°	0%	0 mph0 km/h, gusts 7 mph12 km/h	96%	0%	1
Sat 10a	Sunny	48°9° (likely 48°9° to 51°11°)	48°9°	0%	0 mph0 km/h, gusts 10 mph16 km/h	77%	0%	2
Sat 11a	Sunny	53°12° (likely 53°12° to 54°12°)	53°12°	0%	1 mph2 km/h from SE, gusts 10 mph15 km/h	64%	0%	3
Sat 12p	Sunny	57°14° (likely 55°13° to 57°14°)	57°14°	0%	2 mph3 km/h from SE, gusts 10 mph16 km/h	53%	0%	4
Sat 1p	Sunny	58°14° (likely 56°13° to 58°14°)	58°14°	0%	2 mph3 km/h from SE, gusts 8 mph14 km/h	49%	0%	4
Sat 2p	Sunny	59°15° (likely 57°14° to 59°15°)	59°15°	0%	3 mph5 km/h from SE, gusts 8 mph13 km/h	47%	0%	4
Sat 3p	Sunny	60°16° (likely 57°14° to 60°16°)	60°16°	0%	2 mph3 km/h from SE, gusts 7 mph12 km/h	44%	0%	4
Sat 4p	Sunny	59°15° (likely 57°14° to 59°15°)	59°15°	0%	2 mph3 km/h from SE, gusts 8 mph13 km/h	44%	2%	3
Sat 5p	Sunny	58°14° (likely 56°13° to 58°14°)	58°14°	0%	2 mph3 km/h from SE, gusts 9 mph14 km/h	45%	0%	1
Sat 6p	Clear	55°13° (likely 52°11° to 55°13°)	55°13°	0%	1 mph2 km/h from SE, gusts 8 mph13 km/h	55%	0%	0
Sat 7p	Clear	49°9° (likely 49°9° to 50°10°)	49°9°	0%	1 mph2 km/h from E, gusts 7 mph12 km/h	68%	0%	0
Sat 8p	Clear	45°7° (likely 45°7° to 50°10°)	45°7°	0%	1 mph2 km/h from E, gusts 8 mph13 km/h	76%	0%	0
Sat 9p	Clear	43°6° (likely 43°6° to 49°9°)	43°6°	0%	0 mph0 km/h, gusts 10 mph16 km/h	79%	0%	0
Sat 10p	Clear	42°6° (likely 42°6° to 49°9°)	42°6°	0%	0 mph0 km/h, gusts 11 mph18 km/h	79%	0%	0
Sat 11p	Clear	41°5° (likely 41°5° to 49°9°)	41°5°	0%	0 mph0 km/h, gusts 11 mph18 km/h	82%	1%	0
Sun 12a	Clear	40°4° (likely 40°4° to 48°9°)	40°4°	0%	0 mph0 km/h, gusts 11 mph17 km/h	85%	2%	0
Sun 1a	Clear	40°4° (likely 40°4° to 48°9°)	40°4°	0%	0 mph0 km/h, gusts 10 mph16 km/h	85%	1%	0
Sun 2a	Clear	39°4° (likely 39°4° to 47°8°)	39°4°	0%	0 mph0 km/h, gusts 9 mph15 km/h	89%	0%	0
Sun 3a	Clear	38°3° (likely 38°3° to 47°8°)	38°3°	0%	0 mph0 km/h, gusts 8 mph13 km/h	92%	0%	0
Sun 4a	Clear	37°3° (likely 37°3° to 47°8°)	37°3°	0%	0 mph0 km/h, gusts 7 mph11 km/h	96%	1%	0
Sun 5a	Clear	37°3° (likely 37°3° to 46°8°)	37°3°	0%	0 mph0 km/h, gusts 6 mph10 km/h	96%	3%	0
Sun 6a	Clear	35°2° (likely 35°2° to 45°7°)	35°2°	0%	0 mph0 km/h, gusts 5 mph8 km/h	100%	0%	0
Sun 7a	Clear	34°1° (likely 34°1° to 45°7°)	34°1°	0%	0 mph0 km/h, gusts 4 mph6 km/h	100%	0%	0
Sun 8a	Sunny	35°2° (likely 35°2° to 45°7°)	35°2°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	1%	0
Sun 9a	Sunny	41°5° (likely 41°5° to 48°9°)	41°5°	0%	0 mph0 km/h, gusts 3 mph4 km/h	92%	0%	1
Sun 10a	Sunny	48°9° (likely 48°9° to 52°11°)	48°9°	0%	0 mph0 km/h, gusts 4 mph7 km/h	80%	0%	2
Sun 11a	Sunny	54°12° (likely 54°12° to 56°13°)	54°12°	0%	0 mph0 km/h, gusts 7 mph12 km/h	69%	0%	3

Days ahead

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

Today, Oct 23. Cloudy. High 62°17°, low 35°2°. Typical 63°17° / 42°6°. Dry. Forecasts agree.
1. Afternoon
  noon–6 PM
  Mostly sunny, 61°16°
  Dry
2. Evening
  6 PM–midnight
  Cloudy, 48°9°
  Dry
3. Overnight
  midnight–6 AM
  Clear, 37°3°
  Dry
Official NWS forecast
Today: Mostly sunny, with a high near 62. East wind around 7 mph.
Tonight: Patchy frost and patchy fog after 3am. Mostly clear, with a low around 35. East wind 0 to 3 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
59°15°–62°17°
Low, likely
35°2°–46°8°
Typical high / low
63°17° / 42°6°
Wind
10 mph16 km/h, gusts 20 mph31 km/h
UV peak
4
Tomorrow, Oct 24. Sunny. High 60°16°, low 34°1°. Typical 62°17° / 41°5°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 35°2°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 60°16°
  Dry
3. Evening
  6 PM–midnight
  Clear, 45°7°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 37°3°
  Dry
Official NWS forecast
Day: Patchy frost before 9am. Sunny, with a high near 60. Southeast wind 0 to 3 mph.
Night: Clear, with a low around 34. East wind around 1 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
57°14°–60°16°
Low, likely
34°1°–42°6°
Typical high / low
62°17° / 41°5°
Wind
13 mph21 km/h
UV peak
4
Sunday, Oct 25. Sunny. High 63°17°, low 37°3°. Typical 62°17° / 41°5°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 35°2°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 62°16°
  Dry
3. Evening
  6 PM–midnight
  Clear, 48°9°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 43°6°
  Dry
Official NWS forecast
Day: Patchy frost and patchy fog before 9am. Sunny, with a high near 63. West wind 0 to 3 mph.
Night: Clear, with a low around 37.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
60°16°–63°17°
Low, likely
37°3°–43°6°
Typical high / low
62°17° / 41°5°
Wind
13 mph20 km/h
UV peak
4
Monday, Oct 26. Sunny. High 67°19°, low 44°7°. Typical 62°17° / 41°5°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 43°6°
  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, 49°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 67.
Night: Mostly clear, with a low around 44.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
64°18°–67°19°
Low, likely
41°5°–44°7°
Typical high / low
62°17° / 41°5°
Wind
7 mph11 km/h, gusts 17 mph27 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 64°18°, low 41°5°. Typical 61°16° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 52°11°
  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 64.
Night: Partly cloudy, with a low around 41.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
63°17°–66°19°
Low, likely
41°5°–50°10°
Typical high / low
61°16° / 40°4°
Wind
7 mph11 km/h, gusts 15 mph25 km/h
UV peak
4
Wednesday, Oct 28. Mostly cloudy. High 61°16°, low 43°6°. Typical 61°16° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 44°7°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 59°15°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 54°12°
  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 61.
Night: Mostly cloudy, with a low around 43.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
58°14°–62°17°
Low, likely
40°4°–48°9°
Typical high / low
61°16° / 40°4°
Wind
8 mph12 km/h, gusts 18 mph28 km/h
UV peak
2
Thursday, Oct 29. Partly sunny. High 65°18°, low 45°7°. Typical 60°16° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly sunny, 49°10°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 57°14°
  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 65.
Night: Partly cloudy, with a low around 45.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
64°18°–69°21°
Low, likely
45°7°–50°10°
Typical high / low
60°16° / 40°4°
Wind
9 mph14 km/h, gusts 20 mph33 km/h
UV peak
4
Friday, Oct 30. Cloudy. High 67°19°, low 48°9°. Typical 60°16° / 39°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 48°9°
  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.
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°–70°21°
Low, likely
43°6°–52°11°
Typical high / low
60°16° / 39°4°
Wind
9 mph14 km/h, gusts 22 mph35 km/h
UV peak
4
Saturday, Oct 31. Sunny. High 59°15°, 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, 57°14°
  Dry
3. Evening
  6 PM–midnight
  Clear, 48°9°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 42°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
52°11°–67°19°
Low, likely
38°3°–52°11°
Typical high / low
60°16° / 39°4°
Wind
8 mph13 km/h, gusts 23 mph37 km/h
UV peak
2
Sunday, Nov 1. Rain. High 60°16°, low 49°9°. Typical 59°15° / 38°3°. Rain 0.51 in13 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 42°6°
  Dry
2. Afternoon
  noon–6 PM
  Rain, 55°13°
  20% chance · 0.14 in3.7 mm
3. Evening
  6 PM–midnight
  Rain, 50°10°
  30% chance · 0.17 in4.2 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
57°14°–64°18°
Low, likely
40°4°–54°12°
Typical high / low
59°15° / 38°3°
Wind
9 mph15 km/h, gusts 22 mph35 km/h

10 days15 days30 days

The outlook

Today
Dry, high 62°, low 35°.
Tomorrow
Dry, high 60°, low 34°.
Sunday
Dry, high 63°, low 37°, warming up.
Rest of week
Mostly dry, highs 59–67°.

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

16 mi

Below flood stage

Level: 1.7 ft
Flow: 168 cfs

Forecast peak 1.7 ft Fri 2 PM

Reading from Fri 11:45 AM · NWS gauge page

Antietam Creek near Sharpsburg

22 mi

Below flood stage

Level: 2.4 ft
Flow: 105 cfs

Forecast peak 2.4 ft Fri 2 PM

Reading from Fri 11:15 AM · NWS gauge page

Monocacy River near Frederick at Interstate 70

24 mi

Below flood stage

Level: 1.8 ft
Flow: 182 cfs

Forecast peak 1.8 ft Fri 2 PM

Reading from Fri 11:30 AM · NWS gauge page

Antietam Creek near Waynesboro

4.9 mi

Below flood stage

Level: 2.2 ft
Flow: 27 cfs

Reading from Fri 11:45 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: 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 21 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–3:00 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

Pen Mar 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 7:11–8:06 AM
Blue hour: 6:36–6:46 PM; Morning 7:01–7:11 AM; first light 7:01 AM

Stars tonight? Good

Mostly clear 2–7:02 AM; moon 95% lit, sets 5:42 AM.

Moon

Waxing gibbous

92% lit · growing

Today: sets 4:33 AM · rises 4:50 PM
Full moon: Oct 26
New moon: Nov 9

Looking north from Pen Mar. The highest point on the skyline is about 2,500 ft, 27 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

Pen Mar, 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

Monocacy River near Frederick at Interstate 70

Antietam Creek near Waynesboro

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