Observed 12:30 PM EDT at KDUJ

South Bethlehem, PA weather

Sunny and 54°12°, jacket by 7 PM.

Forecasts agree

Now 54°12°

Sunny

Wind: 8 mph13 km/h; From the south-southeast. Up to 8 mph13 km/h through 12 AM
Dew point: 30°−1°; Dry · up to 42°6° by 1 PM (comfortable)
UV index: 4Moderate; Moderate until 5 PM
Air quality: 49Good; Main pollutant: PM2.5 (fine particles)
Pressure: 30.5 inHg1033 hPa; Falling slowly · −0.04 inHg−1.3 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

2°1° cooler than this time yesterday (54°12° then, 52°11° now)

Good hours for

High 62°17° today at 3 PM
Below 50°10° tonight after 8 PM
Low 33°1° tomorrow at 6 AM
Above 50°10° tomorrow by 11 AM
Fog Monday 8–10 AM

This afternoonUp to 62°17° by 3 PM · Clear
TonightDown to 34°1° by 5 AM · Clear
Tomorrow morningUp to 52°11° by 11 AM · Clear
Tomorrow afternoonUp to 64°18° by 4 PM · Clear
Tomorrow nightDown to 38°3° by 4 AM · Clear
Monday morningUp to 54°12° by 11 AM · Partly cloudy

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 12p	Sunny	56°13° (likely 55°13° to 57°14°)	57°14°	0%	5 mph8 km/h from SE, gusts 11 mph18 km/h	60%	0%	3
Sat 1p	Sunny	60°16° (likely 57°14° to 60°16°)	60°16°	0%	5 mph8 km/h from SE, gusts 10 mph16 km/h	52%	1%	4
Sat 2p	Sunny	61°16° (likely 59°15° to 61°16°)	61°16°	0%	5 mph8 km/h from SE, gusts 10 mph16 km/h	49%	4%	4
Sat 3p	Sunny	62°17° (likely 60°16° to 62°17°)	62°17°	0%	3 mph5 km/h from SE, gusts 9 mph15 km/h	48%	3%	3
Sat 4p	Sunny	62°17° (likely 60°16° to 62°17°)	63°17°	0%	3 mph5 km/h from SE, gusts 9 mph14 km/h	47%	4%	3
Sat 5p	Sunny	62°17° (likely 58°14° to 62°17°)	62°17°	0%	2 mph3 km/h from SE, gusts 9 mph14 km/h	48%	4%	1
Sat 6p	Clear	59°15° (likely 54°12° to 59°15°)	59°15°	0%	2 mph3 km/h from SE, gusts 8 mph12 km/h	53%	2%	1
Sat 7p	Clear	55°13° (likely 49°9° to 55°13°)	55°13°	0%	3 mph5 km/h from E, gusts 7 mph11 km/h	60%	0%	0
Sat 8p	Clear	48°9° (likely 46°8° to 48°9°)	47°8°	0%	5 mph8 km/h from E, gusts 8 mph12 km/h	72%	0%	0
Sat 9p	Clear	45°7° (likely 44°7° to 46°8°)	43°6°	0%	5 mph8 km/h from SE, gusts 8 mph13 km/h	77%	0%	0
Sat 10p	Clear	43°6° (likely 43°6° to 45°7°)	41°5°	0%	3 mph5 km/h from SE, gusts 8 mph13 km/h	77%	0%	0
Sat 11p	Clear	41°5° (likely 41°5° to 44°7°)	39°4°	0%	3 mph5 km/h from SE, gusts 7 mph12 km/h	77%	0%	0
Sun 12a	Clear	40°4° (likely 39°4° to 42°6°)	38°3°	0%	3 mph5 km/h from SE, gusts 7 mph11 km/h	79%	0%	0
Sun 1a	Clear	38°3° (likely 38°3° to 41°5°)	38°3°	0%	3 mph5 km/h from E, gusts 6 mph9 km/h	82%	0%	0
Sun 2a	Clear	37°3° (likely 37°3° to 41°5°)	37°3°	0%	3 mph5 km/h from E, gusts 6 mph9 km/h	84%	0%	0
Sun 3a	Clear	36°2° (likely 36°2° to 40°4°)	36°2°	0%	2 mph3 km/h from E, gusts 5 mph8 km/h	88%	0%	0
Sun 4a	Clear	35°2° (likely 35°2° to 39°4°)	35°2°	0%	2 mph3 km/h from E, gusts 5 mph9 km/h	94%	0%	0
Sun 5a	Clear	34°1° (likely 34°1° to 39°4°)	34°1°	0%	2 mph3 km/h from E, gusts 5 mph8 km/h	98%	0%	0
Sun 6a	Clear	33°1° (likely 33°1° to 38°3°)	33°1°	0%	2 mph3 km/h from E, gusts 5 mph8 km/h	100%	0%	0
Sun 7a	Clear	33°1° (likely 33°1° to 37°3°)	33°1°	0%	2 mph3 km/h from E, gusts 5 mph8 km/h	100%	0%	0
Sun 8a	Sunny	33°1° (likely 33°1° to 37°3°)	33°1°	0%	2 mph3 km/h from E, gusts 5 mph9 km/h	99%	0%	0
Sun 9a	Sunny	37°3° (likely 37°3° to 41°5°)	37°3°	0%	2 mph3 km/h from E, gusts 4 mph7 km/h	100%	0%	0
Sun 10a	Sunny	45°7° (likely 45°7° to 48°9°)	45°7°	0%	2 mph3 km/h from SE, gusts 5 mph8 km/h	86%	0%	1
Sun 11a	Sunny	52°11° (likely 52°11° to 54°12°)	52°11°	0%	2 mph3 km/h from S, gusts 8 mph14 km/h	70%	0%	2
Sun 12p	Sunny	57°14° (likely 56°13° to 57°14°)	57°14°	0%	2 mph3 km/h from S, gusts 8 mph14 km/h	60%	1%	3
Sun 1p	Sunny	61°16° (likely 58°14° to 61°16°)	61°16°	0%	2 mph3 km/h from S, gusts 8 mph12 km/h	52%	1%	4
Sun 2p	Sunny	62°17° (likely 60°16° to 62°17°)	63°17°	0%	2 mph3 km/h from S, gusts 8 mph13 km/h	50%	1%	4
Sun 3p	Sunny	63°17° (likely 61°16° to 63°17°)	63°17°	0%	2 mph3 km/h from S, gusts 8 mph13 km/h	49%	2%	3
Sun 4p	Sunny	64°18° (likely 61°16° to 64°18°)	64°18°	0%	2 mph3 km/h from S, gusts 7 mph11 km/h	48%	29%	3
Sun 5p	Sunny	63°17° (likely 60°16° to 63°17°)	63°17°	0%	1 mph2 km/h from SW, gusts 7 mph11 km/h	50%	38%	1
Sun 6p	Mostly clear	60°16° (likely 55°13° to 60°16°)	60°16°	0%	0 mph0 km/h, gusts 5 mph9 km/h	55%	34%	0
Sun 7p	Mostly clear	56°13° (likely 52°11° to 56°13°)	56°13°	0%	0 mph0 km/h, gusts 4 mph6 km/h	63%	25%	0
Sun 8p	Clear	49°9° (likely 49°9° to 51°11°)	49°9°	0%	0 mph0 km/h, gusts 3 mph6 km/h	79%	0%	0
Sun 9p	Clear	46°8° (likely 46°8° to 50°10°)	46°8°	0%	0 mph0 km/h, gusts 3 mph4 km/h	87%	5%	0
Sun 10p	Partly cloudy	44°7° (likely 44°7° to 49°9°)	44°7°	0%	0 mph0 km/h, gusts 2 mph3 km/h	90%	51%	0
Sun 11p	Mostly clear	42°6° (likely 42°6° to 48°9°)	43°6°	0%	0 mph0 km/h, gusts 3 mph5 km/h	94%	27%	0
Mon 12a	Clear	41°5° (likely 41°5° to 46°8°)	41°5°	0%	0 mph0 km/h, gusts 3 mph5 km/h	98%	21%	0
Mon 1a	Clear	40°4° (likely 40°4° to 45°7°)	40°4°	0%	0 mph0 km/h, gusts 4 mph6 km/h	100%	17%	0
Mon 2a	Clear	40°4° (likely 40°4° to 44°7°)	40°4°	0%	0 mph0 km/h, gusts 4 mph6 km/h	100%	15%	0
Mon 3a	Clear	39°4° (likely 39°4° to 44°7°)	39°4°	0%	0 mph0 km/h, gusts 4 mph7 km/h	100%	10%	0
Mon 4a	Clear	38°3° (likely 38°3° to 43°6°)	38°3°	0%	0 mph0 km/h, gusts 4 mph7 km/h	100%	12%	0
Mon 5a	Clear	38°3° (likely 38°3° to 43°6°)	38°3°	0%	0 mph0 km/h, gusts 4 mph7 km/h	100%	16%	0
Mon 6a	Clear	37°3° (likely 37°3° to 42°6°)	37°3°	0%	0 mph0 km/h, gusts 4 mph6 km/h	100%	22%	0
Mon 7a	Clear	37°3° (likely 37°3° to 42°6°)	37°3°	0%	0 mph0 km/h, gusts 3 mph5 km/h	99%	29%	0
Mon 8a	Fog	37°3° (likely 37°3° to 42°6°)	37°3°	0%	1 mph2 km/h from S, gusts 3 mph5 km/h	99%	47%	0
Mon 9a	Fog	40°4° (likely 38°3° to 47°8°)	40°4°	0%	2 mph3 km/h from S, gusts 3 mph5 km/h	100%	42%	0
Mon 10a	Mostly sunny	47°8° (likely 45°7° to 51°11°)	47°8°	0%	2 mph3 km/h from SW, gusts 5 mph8 km/h	93%	25%	1
Mon 11a	Sunny	54°12° (likely 51°11° to 56°13°)	54°12°	0%	2 mph3 km/h from SW, gusts 8 mph12 km/h	78%	21%	2

Days ahead

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

Today, Oct 24. Sunny. High 63°17°, low 33°1°. Typical 59°15° / 35°2°. Dry. Forecasts agree.
1. Afternoon
  noon–6 PM
  Sunny, 62°17°
  Dry
2. Evening
  6 PM–midnight
  Clear, 48°9°
  Dry
3. Overnight
  midnight–6 AM
  Clear, 34°1°
  Dry
Official NWS forecast
Today: Sunny, with a high near 63. Southeast wind around 5 mph.
Tonight: Areas of frost between 2am and 4am, then areas of frost and patchy fog. Clear, with a low around 33. East wind around 5 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
60°16°–63°17°
Low, likely
33°1°–39°4°
Typical high / low
59°15° / 35°2°
Wind
8 mph12 km/h, gusts 17 mph27 km/h
UV peak
4
Tomorrow, Oct 25. Fog. High 64°18°, low 37°3°. Typical 58°14° / 35°2°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 33°1°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 49°9°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 38°3°
  Dry
Official NWS forecast
Day: Areas of frost and patchy fog before 10am. Sunny, with a high near 64. South wind around 2 mph.
Night: Areas of fog after 11pm. Mostly clear, with a low around 37. Wind around 0 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
61°16°–64°18°
Low, likely
34°1°–37°3°
Typical high / low
58°14° / 35°2°
Wind
7 mph11 km/h, gusts 13 mph21 km/h
UV peak
4
Monday, Oct 26. Fog. High 68°20°, low 41°5°. Typical 58°14° / 34°1°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Fog, 37°3°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 53°12°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 45°7°
  Dry
Official NWS forecast
Day: Areas of fog before 10am. Sunny, with a high near 68. Southwest wind 0 to 5 mph.
Night: Areas of fog after 10pm. Partly cloudy, with a low around 41.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
64°18°–68°20°
Low, likely
37°3°–41°5°
Typical high / low
58°14° / 34°1°
Wind
7 mph11 km/h, gusts 17 mph27 km/h
UV peak
4
Tuesday, Oct 27. Cloudy. High 64°18°, low 40°4°. Typical 58°14° / 34°1°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 44°7°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 62°17°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 52°11°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 47°8°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Areas of fog before 10am. Mostly sunny, with a high near 64.
Night: Mostly cloudy, with a low around 40.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
61°16°–64°18°
Low, likely
40°4°–46°8°
Typical high / low
58°14° / 34°1°
Wind
7 mph10 km/h, gusts 12 mph19 km/h
UV peak
4
Wednesday, Oct 28. Cloudy. High 66°19°, low 42°6°. Typical 57°14° / 34°1°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 53°12°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 45°7°
  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 42.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
62°17°–66°19°
Low, likely
42°6°–48°9°
Typical high / low
57°14° / 34°1°
Wind
10 mph16 km/h, gusts 20 mph32 km/h
UV peak
3
Thursday, Oct 29. Mostly sunny. High 69°21°, low 43°6°. Typical 57°14° / 33°1°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 44°7°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 67°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.
Official NWS forecast
Day: 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
66°19°–69°21°
Low, likely
41°5°–47°8°
Typical high / low
57°14° / 33°1°
Wind
8 mph14 km/h, gusts 27 mph43 km/h
UV peak
4
Friday, Oct 30. Partly sunny. High 67°19°, low 41°5°. Typical 56°13° / 33°1°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 46°8°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 67°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 55°13°
  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 67.
Night: Partly cloudy, with a low around 41.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
64°18°–70°21°
Low, likely
41°5°–47°8°
Typical high / low
56°13° / 33°1°
Wind
11 mph17 km/h, gusts 20 mph32 km/h
UV peak
2
Saturday, Oct 31. Cloudy. High 66°19°, low 44°7°. Typical 56°13° / 33°1°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 45°7°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 67°20°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 50°10°
  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
57°14°–71°22°
Low, likely
37°3°–50°10°
Typical high / low
56°13° / 33°1°
Wind
9 mph14 km/h, gusts 22 mph36 km/h
UV peak
3
Sunday, Nov 1. Cloudy. High 65°18°, low 50°10°. Typical 55°13° / 32°0°. Rain 0.04 in1 mm, 50% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 50°10°
  30% chance
2. Afternoon
  noon–6 PM
  Cloudy, 64°18°
  40% chance
3. Evening
  6 PM–midnight
  Cloudy, 56°13°
  50% chance · 0.05 in1.3 mm
4. Overnight
  midnight–6 AM
  Cloudy, 56°13°
  50% chance · 0.12 in2.9 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
52°11°–71°22°
Low, likely
44°7°–54°12°
Typical high / low
55°13° / 32°0°
Wind
14 mph23 km/h, gusts 32 mph51 km/h
UV peak
2
Monday, Nov 2. Drizzle. High 59°15°, low 52°11°. Typical 55°13° / 32°0°. Rain 0.44 in11 mm, 50% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 56°13°
  50% chance · 0.08 in2.1 mm
2. Afternoon
  noon–6 PM
  Drizzle, 60°15°
  40% chance · 0.06 in1.5 mm
3. Evening
  6 PM–midnight
  Drizzle, 54°12°
  40% chance · 0.05 in1.3 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
50°10°–65°18°
Low, likely
45°7°–58°14°
Typical high / low
55°13° / 32°0°
Wind
14 mph23 km/h, gusts 31 mph50 km/h
UV peak
1

10 days15 days30 days

The outlook

Today
Dry, high 63°, low 33°.
Tomorrow
Dry, high 64°, low 37°.
Monday
Dry, high 68°, low 41°, warming up.
Rest of week
Highs 59–69°; chance of precipitation on Monday.

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

2.9 mi

Below flood stage

Level: 3.3 ft
Flow: 304 cfs

Forecast peak 3.3 ft Sat 2 PM

Reading from Sat 10:45 AM · NWS gauge page

Allegheny River at Kittanning Lock and Dam

16 mi

Below flood stage

Level: 10.4 ft
Flow: 5,220 cfs

Forecast peak 10.5 ft Sat 2 PM

Reading from Sat 11 AM · NWS gauge page

Allegheny River at Parker

19 mi

Below flood stage

Level: 2.5 ft
Flow: 4,480 cfs

Forecast peak 2.7 ft Sat 2 PM

Reading from Sat 11 AM · NWS gauge page

Mahoning Creek at Mahoning Dam Tailwater

5.6 mi

Below flood stage

Level: 2.6 ft
Flow: 306 cfs

Reading from Sat 10:45 AM · NWS gauge page

For your home

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

Heating this week

About 74% less heating than a typical week.

This week 35Typical 135

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

Comfort

Dry air outside (dew point 30°F).

Open the windows?

Today, 1:00 PM–5:00 PM

Good stretch to open the windows.

Is this typical?

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

Oct 24, today vs a typical year

Today’s expected high is 4°2° warmer than typical.

Last 7 days vs normal

On average 1°0° warmer than normal (daily mean temperature).

—SunOct 18
+1°MonOct 19
±0°TueOct 20
+1°±0°WedOct 21
±0°ThuOct 22
+2°+1°FriOct 23
—SatOct 24

South Bethlehem weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 44 min; Losing 2 min 35 s a day; shortest Dec 21, 1 h 31 min less
Golden hour: 5:45–6:40 PM; Morning 7:21–8:17 AM
Blue hour: 6:40–6:51 PM; Morning 7:10–7:21 AM; first light 7:10 AM

Stars tonight? Fair

Clear 6:51 PM–7:11 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

97% lit · growing

Today: sets 5:50 AM · rises 5:20 PM
Full moon: Oct 26
New moon: Nov 9

Looking northwest from South Bethlehem. The highest point on the skyline is about 1,700 ft, 2 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

South Bethlehem, PA weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Red Bank Creek at St Charles

Allegheny River at Kittanning Lock and Dam

Allegheny River at Parker

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 24, today vs a typical year

Last 7 days vs normal

Sun & moon

Sun

Stars tonight? Fair

Moon