Observed 7:20 AM EDT at KDUJ

Summerville, PA weather

Foggy and 41°5°.

Forecasts agree

Now 41°5°

Fog

Wind: 3 mph5 km/h; From the north. Light through 7 PM
Dew point: 41°5°; Comfortable
Humidity: 100%; Air 41°5°, dew point 41°5° · fog or dew likely
UV index: 0Low; Moderate 12–4 PM · peak 4
Pressure: 30.31 inHg1026 hPa; Rising · +0.05 inHg+1.6 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 (35°2° then, 42°6° now)

Good hours for

Above 50°10° today by 11 AM
High 61°16° today at 4 PM
Below 50°10° tonight after 8 PM

This morningUp to 52°11° by 11 AM · Clear
This afternoonUp to 61°16° by 4 PM · Clear
TonightDown to 34°1° by 4 AM · Clear
Tomorrow morningUp to 52°11° by 11 AM · Clear
Tomorrow afternoonUp to 62°17° by 4 PM · Clear
Tomorrow nightDown to 33°1° 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
Fri 7a	Clear	39°4° (likely 38°3° to 42°6°)	39°4°	0%	1 mph2 km/h from NE, gusts 4 mph6 km/h	97%	13%	0
Fri 8a	Sunny	39°4° (likely 38°3° to 42°6°)	39°4°	0%	1 mph2 km/h from NE, gusts 4 mph7 km/h	95%	14%	0
Fri 9a	Sunny	41°5° (likely 41°5° to 45°7°)	41°5°	0%	2 mph3 km/h from NE, gusts 5 mph8 km/h	100%	17%	0
Fri 10a	Sunny	46°8° (likely 46°8° to 52°11°)	46°8°	0%	2 mph3 km/h from E, gusts 10 mph16 km/h	89%	16%	1
Fri 11a	Sunny	52°11° (likely 52°11° to 56°13°)	52°11°	0%	3 mph5 km/h from E, gusts 10 mph15 km/h	72%	10%	2
Fri 12p	Sunny	55°13° (likely 55°13° to 58°14°)	55°13°	0%	3 mph5 km/h from E, gusts 9 mph14 km/h	60%	9%	3
Fri 1p	Sunny	58°14° (likely 58°14° to 60°16°)	58°14°	0%	3 mph5 km/h from E, gusts 8 mph13 km/h	50%	8%	4
Fri 2p	Sunny	60°16° (likely 59°15° to 62°17°)	60°16°	0%	2 mph3 km/h from E, gusts 8 mph12 km/h	45%	6%	3
Fri 3p	Sunny	60°16° (likely 60°16° to 62°17°)	60°16°	0%	2 mph3 km/h from E, gusts 7 mph11 km/h	43%	7%	3
Fri 4p	Sunny	61°16° (likely 60°16° to 62°17°)	61°16°	0%	2 mph3 km/h from E, gusts 6 mph10 km/h	41%	14%	2
Fri 5p	Sunny	60°16° (likely 59°15° to 61°16°)	60°16°	0%	2 mph3 km/h from E, gusts 6 mph9 km/h	41%	30%	1
Fri 6p	Clear	58°14° (likely 55°13° to 59°15°)	58°14°	0%	1 mph2 km/h from E, gusts 5 mph9 km/h	46%	13%	0
Fri 7p	Mostly clear	54°12° (likely 51°11° to 54°12°)	54°12°	0%	1 mph2 km/h from E, gusts 5 mph8 km/h	53%	28%	0
Fri 8p	Partly cloudy	47°8° (likely 47°8° to 49°9°)	47°8°	0%	1 mph2 km/h from E, gusts 6 mph9 km/h	68%	40%	0
Fri 9p	Mostly clear	44°7° (likely 44°7° to 48°9°)	44°7°	0%	1 mph2 km/h from E, gusts 5 mph8 km/h	70%	57%	0
Fri 10p	Mostly clear	42°6° (likely 42°6° to 47°8°)	42°6°	0%	2 mph3 km/h from E, gusts 5 mph8 km/h	74%	39%	0
Fri 11p	Clear	40°4° (likely 40°4° to 45°7°)	40°4°	0%	2 mph3 km/h from E, gusts 6 mph9 km/h	77%	1%	0
Sat 12a	Clear	39°4° (likely 39°4° to 44°7°)	39°4°	0%	2 mph3 km/h from E, gusts 6 mph9 km/h	81%	0%	0
Sat 1a	Clear	38°3° (likely 38°3° to 43°6°)	38°3°	0%	2 mph3 km/h from E, gusts 6 mph9 km/h	83%	0%	0
Sat 2a	Clear	37°3° (likely 37°3° to 42°6°)	37°3°	0%	2 mph3 km/h from E, gusts 5 mph9 km/h	85%	0%	0
Sat 3a	Clear	36°2° (likely 36°2° to 42°6°)	36°2°	0%	2 mph3 km/h from E, gusts 6 mph9 km/h	88%	0%	0
Sat 4a	Clear	34°1° (likely 34°1° to 41°5°)	34°1°	0%	2 mph3 km/h from E, gusts 6 mph9 km/h	93%	0%	0
Sat 5a	Clear	34°1° (likely 34°1° to 40°4°)	34°1°	0%	2 mph3 km/h from E, gusts 6 mph9 km/h	93%	0%	0
Sat 6a	Clear	33°1° (likely 33°1° to 40°4°)	33°1°	0%	2 mph3 km/h from E, gusts 6 mph9 km/h	93%	0%	0
Sat 7a	Clear	33°1° (likely 33°1° to 39°4°)	33°1°	0%	2 mph3 km/h from E, gusts 6 mph10 km/h	90%	0%	0
Sat 8a	Sunny	33°1° (likely 33°1° to 40°4°)	33°1°	0%	2 mph3 km/h from E, gusts 6 mph9 km/h	92%	0%	0
Sat 9a	Sunny	37°3° (likely 37°3° to 43°6°)	34°1°	0%	3 mph5 km/h from E, gusts 6 mph9 km/h	91%	0%	0
Sat 10a	Sunny	45°7° (likely 45°7° to 49°9°)	44°7°	0%	3 mph5 km/h from SE, gusts 11 mph18 km/h	75%	0%	1
Sat 11a	Sunny	52°11° (likely 51°11° to 54°12°)	52°11°	0%	5 mph8 km/h from SE, gusts 13 mph21 km/h	61%	0%	2
Sat 12p	Sunny	56°13° (likely 54°12° to 58°14°)	56°13°	0%	5 mph8 km/h from SE, gusts 11 mph17 km/h	53%	0%	3
Sat 1p	Sunny	59°15° (likely 56°13° to 60°16°)	59°15°	0%	3 mph5 km/h from SE, gusts 10 mph15 km/h	45%	0%	4
Sat 2p	Sunny	61°16° (likely 58°14° to 62°17°)	61°16°	0%	3 mph5 km/h from SE, gusts 9 mph14 km/h	43%	0%	4
Sat 3p	Sunny	61°16° (likely 58°14° to 62°17°)	61°16°	0%	2 mph3 km/h from SE, gusts 9 mph14 km/h	42%	0%	3
Sat 4p	Sunny	62°17° (likely 59°15° to 63°17°)	62°17°	0%	2 mph3 km/h from SE, gusts 9 mph14 km/h	41%	0%	3
Sat 5p	Sunny	61°16° (likely 58°14° to 61°16°)	61°16°	0%	2 mph3 km/h from SE, gusts 9 mph14 km/h	42%	0%	1
Sat 6p	Clear	58°14° (likely 54°12° to 58°14°)	59°15°	0%	1 mph2 km/h from SE, gusts 6 mph10 km/h	46%	0%	0
Sat 7p	Clear	54°12° (likely 49°9° to 54°12°)	55°13°	0%	2 mph3 km/h from E, gusts 7 mph11 km/h	53%	0%	0
Sat 8p	Clear	48°9° (likely 46°8° to 50°10°)	47°8°	0%	3 mph5 km/h from E, gusts 9 mph14 km/h	66%	0%	0
Sat 9p	Clear	45°7° (likely 44°7° to 47°8°)	45°7°	0%	2 mph3 km/h from SE, gusts 9 mph15 km/h	70%	0%	0
Sat 10p	Clear	43°6° (likely 43°6° to 46°8°)	43°6°	0%	2 mph3 km/h from SE, gusts 8 mph13 km/h	74%	0%	0
Sat 11p	Clear	41°5° (likely 41°5° to 45°7°)	41°5°	0%	2 mph3 km/h from SE, gusts 7 mph12 km/h	76%	0%	0
Sun 12a	Clear	40°4° (likely 40°4° to 44°7°)	40°4°	0%	2 mph3 km/h from SE, gusts 7 mph11 km/h	78%	0%	0
Sun 1a	Clear	38°3° (likely 38°3° to 42°6°)	38°3°	0%	2 mph3 km/h from SE, gusts 6 mph10 km/h	80%	0%	0
Sun 2a	Clear	37°3° (likely 37°3° to 42°6°)	37°3°	0%	2 mph3 km/h from SE, gusts 6 mph10 km/h	82%	0%	0
Sun 3a	Clear	36°2° (likely 36°2° to 41°5°)	36°2°	0%	2 mph3 km/h from SE, gusts 6 mph9 km/h	86%	0%	0
Sun 4a	Clear	34°1° (likely 34°1° to 41°5°)	34°1°	0%	2 mph3 km/h from SE, gusts 5 mph9 km/h	90%	0%	0
Sun 5a	Clear	33°1° (likely 33°1° to 40°4°)	33°1°	0%	1 mph2 km/h from SE, gusts 5 mph8 km/h	94%	0%	0
Sun 6a	Clear	31°−1° (likely 31°−1° to 40°4°)	31°−1°	0%	1 mph2 km/h from SE, gusts 6 mph10 km/h	98%	0%	0

Days ahead

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

Today, Oct 23. Mostly sunny. High 62°17°, low 32°0°. Typical 59°15° / 35°2°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 39°4°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 61°16°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 47°8°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 34°1°
  Dry
Official NWS forecast
Today: Sunny, with a high near 62. Northeast wind around 3 mph.
Tonight: Areas of frost after 3am. Mostly 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°–41°5°
Typical high / low
59°15° / 35°2°
Wind
7 mph11 km/h, gusts 13 mph21 km/h
UV peak
4
Tomorrow, Oct 24. Sunny. High 62°17°, low 30°−1°. Typical 59°15° / 35°2°. Dry. Mostly 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, 48°9°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 33°1°
  Dry
Official NWS forecast
Day: Areas of frost before 10am. Sunny, with a high near 62. East wind around 5 mph.
Night: Areas of frost after 2am. Clear, with a low around 30. Southeast wind around 3 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
59°15°–63°17°
Low, likely
30°−1°–39°4°
Typical high / low
59°15° / 35°2°
Wind
8 mph13 km/h, gusts 16 mph26 km/h
UV peak
4
Sunday, Oct 25. Sunny. High 64°18°, low 34°1°. Typical 58°14° / 35°2°. 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, 50°10°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 40°5°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Widespread frost before 9am. Sunny, with a high near 64. South wind around 2 mph.
Night: Mostly clear, with a low around 34.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
62°17°–64°18°
Low, likely
34°1°–39°4°
Typical high / low
58°14° / 35°2°
Wind
7 mph11 km/h, gusts 12 mph20 km/h
UV peak
4
Monday, Oct 26. Mostly sunny. High 68°20°, low 38°3°. Typical 58°14° / 34°1°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 40°4°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 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: Patchy frost before 9am. Sunny, with a high near 68.
Night: Partly cloudy, with a low around 38.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
64°18°–68°20°
Low, likely
36°2°–42°6°
Typical high / low
58°14° / 34°1°
Wind
7 mph11 km/h, gusts 15 mph24 km/h
UV peak
4
Tuesday, Oct 27. Partly sunny. High 63°17°, low 38°3°. Typical 58°14° / 34°1°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 46°8°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 53°12°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 48°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 63.
Night: Partly cloudy, with a low around 38.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
61°16°–67°19°
Low, likely
38°3°–46°8°
Typical high / low
58°14° / 34°1°
Wind
6 mph10 km/h, gusts 14 mph23 km/h
UV peak
4
Wednesday, Oct 28. Cloudy. High 64°18°, low 39°4°. Typical 57°14° / 34°1°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Cloudy, 49°9°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 48°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 64.
Night: Partly cloudy, with a low around 39.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
64°18°–65°18°
Low, likely
39°4°–48°9°
Typical high / low
57°14° / 34°1°
Wind
11 mph18 km/h, gusts 17 mph27 km/h
UV peak
3
Thursday, Oct 29. Partly sunny. High 66°19°, low 42°6°. Typical 57°14° / 33°1°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 55°13°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 51°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 66.
Night: Partly cloudy, with a low around 42.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
64°18°–68°20°
Low, likely
42°6°–49°9°
Typical high / low
57°14° / 33°1°
Wind
11 mph18 km/h, gusts 25 mph41 km/h
UV peak
4
Friday, Oct 30. Cloudy. High 62°17°, low 47°8°. Typical 56°13° / 33°1°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 60°16°
  Dry
3. Evening
  6 PM–midnight
  Clear, 51°11°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 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
56°13°–67°19°
Low, likely
44°7°–49°9°
Typical high / low
56°13° / 33°1°
Wind
8 mph14 km/h, gusts 20 mph32 km/h
UV peak
3
Saturday, Oct 31. Drizzle. High 57°14°, low 43°6°. Typical 56°13° / 33°1°. Rain 0.01 in0.3 mm, 10% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 44°6°
  Dry
2. Afternoon
  noon–6 PM
  Drizzle, 54°12°
  Dry
3. Evening
  6 PM–midnight
  Drizzle, 46°8°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 41°5°
  20% chance · 0.04 in1 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
48°9°–65°18°
Low, likely
37°3°–52°11°
Typical high / low
56°13° / 33°1°
Wind
9 mph14 km/h, gusts 21 mph33 km/h
UV peak
2
Sunday, Nov 1. Drizzle. High 59°15°, low 46°8°. Typical 55°13° / 32°0°. Rain 0.15 in3.8 mm, 40% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 42°5°
  30% chance
2. Afternoon
  noon–6 PM
  Drizzle, 55°13°
  40% chance · 0.03 in0.8 mm
3. Evening
  6 PM–midnight
  Cloudy, 50°10°
  40% 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.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
56°13°–63°17°
Low, likely
33°1°–55°13°
Typical high / low
55°13° / 32°0°
Wind
9 mph15 km/h, gusts 21 mph33 km/h

10 days15 days30 days

The outlook

Today
Dry, high 62°, low 32°.
Tomorrow
Dry, high 62°, low 30°.
Sunday
Dry, high 64°, low 34°.
Rest of week
Highs 57–68°; chance of precipitation on Sunday.

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

Red Bank Creek at St Charles

14 mi

Below flood stage

Level: 3.4 ft
Flow: 327 cfs

Forecast peak 3.4 ft Fri 8 AM

Reading from Fri 6 AM · NWS gauge page

Mahoning Creek at Mahoning Dam Pool

14 mi

Below flood stage

Level: 1091 ft

Forecast peak 1091 ft Fri 8 AM

Reading from Fri 6:45 AM · NWS gauge page

Red Bank Creek at Brookville

6.3 mi

Below flood stage

Level: 6.5 ft

Reading from Fri 6 AM · NWS gauge page

Mahoning Creek at Mahoning Dam Tailwater

14 mi

Below flood stage

Level: 3.1 ft
Flow: 560 cfs

Reading from Fri 6:45 AM · NWS gauge page

For your home

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

Heating this week

About 72% less heating than a typical week.

This week 37Typical 132

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 18 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?

Clarion 3 SW · official normals 1991–2020 · records 1943–2026

Oct 23, today vs a typical year

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

Last 7 days vs normal

On average 0° warmer than normal (daily mean temperature).

—SatOct 17
—SunOct 18
+1°MonOct 19
±0°TueOct 20
+1°±0°WedOct 21
—ThuOct 22
—FriOct 23

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

Sun & moon

Sun

Daylight: 10 h 47 min; Losing 2 min 35 s a day; shortest Dec 21, 1 h 34 min less
Golden hour: 5:45–6:41 PM; Morning 7:20–8:15 AM
Blue hour: 6:41–6:52 PM; Morning 7:09–7:20 AM; first light 7:09 AM

Stars tonight? Good

Mostly clear 11 PM–7:10 AM; moon 95% lit, sets 5:50 AM.

Moon

Waxing gibbous

91% lit · growing

Today: sets 4:40 AM · rises 4:56 PM
Full moon: Oct 26
New moon: Nov 9

Looking west from Summerville. The highest point on the skyline is about 1,700 ft, 4 mi away.Skyline from USGS elevation data, heights drawn up to 5.5× taller. Sky, sun and moon as they are now.

Summerville, PA weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Sunday

Rest of week

What changed since yesterday

Radar

Rivers

Red Bank Creek at St Charles

Mahoning Creek at Mahoning Dam Pool

Red Bank Creek at Brookville

Mahoning Creek at Mahoning Dam Tailwater

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