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Current weather in South New Castle is broken clouds.

Where can I find the hourly weather forecast for South New Castle?

This page shows hourly weather forecast for South New Castle, including temperature, wind, precipitation, humidity and cloud cover.

Is the weather forecast for South New Castle updated regularly?

Weather data for South New Castle is updated regularly with the latest available observations and forecasts.

Now · 3:17 PM

South New Castle Weather & Hourly Forecast

United States · Pennsylvania · 16102

80°F

Mostly cloudy

Feels like: 83°F

💧 Humidity 53% 🌡 Pressure 30.18 inHg 💨 Wind 2 mph 👁 Visibility 24.1 mi ☁ Clouds 80% ☀️ UV index 5.3 · Moderate 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for South New Castle

Today

4:00 PM

Overcast

81° 💧 None 💨 0 mph H 51%30.18 inHg

7:00 PM

Mostly cloudy

77° 💧 None 💨 2 mph H 77%30.15 inHg

10:00 PM

Mostly cloudy night

70° 💧 None 💨 6 mph H 80%30.18 inHg

Tomorrow

1:00 AM

Partly cloudy night

68° 💧 None 💨 5 mph H 86%30.18 inHg

4:00 AM

Mostly cloudy night

68° 💧 None 💨 6 mph H 87%30.12 inHg

7:00 AM

Mostly cloudy

67° 💧 None 💨 8 mph H 89%30.12 inHg

10:00 AM

Partly cloudy

76° 💧 0.001 in 💨 9 mph H 76%30.12 inHg

1:00 PM

Overcast

83° 💧 0.004 in 💨 13 mph H 63%30.06 inHg

4:00 PM

Mostly sunny

85° 💧 0.001 in 💨 13 mph H 55%29.97 inHg

7:00 PM

Mostly sunny

81° 💧 0.000 in 💨 10 mph H 64%29.94 inHg

10:00 PM

Light thunderstorms

75° 💧 0.198 in 💨 12 mph H 78%29.94 inHg

Thursday

1:00 AM

Light thunderstorms

71° 💧 0.026 in 💨 8 mph H 98%29.97 inHg

4:00 AM

Overcast night

70° 💧 0.003 in 💨 7 mph H 99%29.94 inHg

7:00 AM

Overcast

69° 💧 0.001 in 💨 6 mph H 99%29.97 inHg

10:00 AM

Overcast

70° 💧 None 💨 3 mph H 93%29.97 inHg

1:00 PM

Overcast

72° 💧 None 💨 3 mph H 82%29.97 inHg

Today

4:00 PM

Overcast

81° 💧 None 💨 0 mph H 51%30.18 inHg

5:00 PM

Overcast

81° 💧 None 💨 2 mph H 52%30.15 inHg

6:00 PM

Partly cloudy

79° 💧 None 💨 2 mph H 64%30.15 inHg

7:00 PM

Mostly cloudy

77° 💧 None 💨 2 mph H 77%30.15 inHg

8:00 PM

Overcast night

73° 💧 None 💨 2 mph H 78%30.15 inHg

9:00 PM

Overcast night

71° 💧 None 💨 3 mph H 80%30.18 inHg

10:00 PM

Mostly cloudy night

70° 💧 None 💨 6 mph H 80%30.18 inHg

11:00 PM

Mostly cloudy night

70° 💧 None 💨 6 mph H 82%30.18 inHg

Tomorrow

12:00 AM

Mostly cloudy night

69° 💧 None 💨 6 mph H 85%30.18 inHg

1:00 AM

Partly cloudy night

68° 💧 None 💨 5 mph H 86%30.18 inHg

2:00 AM

Partly cloudy night

68° 💧 None 💨 6 mph H 87%30.15 inHg

3:00 AM

Mostly clear night

68° 💧 None 💨 7 mph H 86%30.12 inHg

4:00 AM

Mostly cloudy night

68° 💧 None 💨 6 mph H 87%30.12 inHg

5:00 AM

Overcast night

67° 💧 None 💨 7 mph H 88%30.12 inHg

6:00 AM

Mostly cloudy night

68° 💧 None 💨 7 mph H 87%30.12 inHg

7:00 AM

Mostly cloudy

67° 💧 None 💨 8 mph H 89%30.12 inHg

8:00 AM

Mostly cloudy

69° 💧 None 💨 8 mph H 86%30.15 inHg

9:00 AM

Mostly sunny

72° 💧 None 💨 8 mph H 82%30.12 inHg

10:00 AM

Partly cloudy

76° 💧 None 💨 9 mph H 76%30.12 inHg

11:00 AM

Partly cloudy

79° 💧 None 💨 10 mph H 71%30.09 inHg

12:00 PM

Overcast

81° 💧 0.001 in 💨 12 mph H 67%30.09 inHg

1:00 PM

Overcast

83° 💧 0.004 in 💨 13 mph H 63%30.06 inHg

2:00 PM

Mostly sunny

84° 💧 0.000 in 💨 13 mph H 58%30.03 inHg

3:00 PM

Mostly sunny

85° 💧 0.000 in 💨 13 mph H 55%30.00 inHg

4:00 PM

Mostly sunny

85° 💧 0.001 in 💨 13 mph H 55%29.97 inHg

5:00 PM

Mostly sunny

84° 💧 0.000 in 💨 12 mph H 58%29.94 inHg

6:00 PM

Mostly sunny

83° 💧 None 💨 11 mph H 61%29.94 inHg

7:00 PM

Mostly sunny

81° 💧 None 💨 10 mph H 64%29.94 inHg

8:00 PM

Mostly cloudy night

79° 💧 None 💨 10 mph H 66%29.94 inHg

9:00 PM

Mostly cloudy night

79° 💧 0.000 in 💨 11 mph H 68%29.91 inHg

10:00 PM

Light thunderstorms

75° 💧 0.026 in 💨 12 mph H 78%29.94 inHg

11:00 PM

Light thunderstorms

71° 💧 0.082 in 💨 10 mph H 97%29.97 inHg

Thursday

12:00 AM

Light thunderstorms

71° 💧 0.090 in 💨 7 mph H 98%29.97 inHg

1:00 AM

Light thunderstorms

71° 💧 0.020 in 💨 8 mph H 98%29.97 inHg

2:00 AM

Overcast night

71° 💧 0.002 in 💨 7 mph H 99%29.94 inHg

3:00 AM

Overcast night

71° 💧 0.003 in 💨 7 mph H 99%29.94 inHg

4:00 AM

Overcast night

70° 💧 0.001 in 💨 7 mph H 99%29.94 inHg

5:00 AM

Overcast night

70° 💧 0.000 in 💨 7 mph H 99%29.94 inHg

6:00 AM

Overcast night

70° 💧 0.002 in 💨 7 mph H 99%29.97 inHg

7:00 AM

Overcast

69° 💧 0.000 in 💨 6 mph H 99%29.97 inHg

8:00 AM

Overcast

69° 💧 0.000 in 💨 5 mph H 98%29.97 inHg

9:00 AM

Overcast

69° 💧 0.000 in 💨 3 mph H 96%29.97 inHg

10:00 AM

Overcast

70° 💧 None 💨 3 mph H 93%29.97 inHg

11:00 AM

Overcast

70° 💧 None 💨 3 mph H 92%29.97 inHg

12:00 PM

Overcast

72° 💧 None 💨 3 mph H 86%29.97 inHg

1:00 PM

Overcast

72° 💧 None 💨 3 mph H 82%29.97 inHg

2:00 PM

Overcast

73° 💧 None 💨 3 mph H 77%29.94 inHg

3:00 PM

Overcast

73° 💧 None 💨 5 mph H 76%29.94 inHg

4:00 PM

Overcast

73° 💧 None 💨 4 mph H 74%29.91 inHg

5:00 PM

Overcast

73° 💧 None 💨 3 mph H 76%29.88 inHg

6:00 PM

Overcast

72° 💧 None 💨 4 mph H 80%29.88 inHg

7:00 PM

Overcast

71° 💧 None 💨 3 mph H 86%29.91 inHg

8:00 PM

Mostly cloudy night

69° 💧 None 💨 3 mph H 92%29.91 inHg

9:00 PM

Mostly clear night

68° 💧 None 💨 4 mph H 94%29.91 inHg

10:00 PM

Clear night

66° 💧 None 💨 5 mph H 96%29.94 inHg

11:00 PM

Clear night

65° 💧 None 💨 4 mph H 97%29.97 inHg

Friday

12:00 AM

Clear night

63° 💧 None 💨 3 mph H 99%29.97 inHg

1:00 AM

Mostly clear night

62° 💧 None 💨 2 mph H 100%29.97 inHg

2:00 AM

Fog at night

61° 💧 None 💨 3 mph H 100%29.97 inHg

3:00 AM

Fog at night

61° 💧 None 💨 3 mph H 99%29.97 inHg

4:00 AM

Fog at night

60° 💧 None 💨 4 mph H 100%29.97 inHg

5:00 AM

Fog at night

60° 💧 None 💨 3 mph H 100%30.00 inHg

6:00 AM

Fog at night

59° 💧 None 💨 3 mph H 99%30.00 inHg

7:00 AM

Fog

58° 💧 None 💨 3 mph H 100%30.03 inHg

8:00 AM

Mist

60° 💧 None 💨 3 mph H 98%30.03 inHg

11:00 AM

Sunny

69° 💧 None 💨 5 mph H 65%30.06 inHg

2:00 PM

Mostly cloudy

74° 💧 None 💨 1 mph H 52%30.03 inHg

5:00 PM

Sunny

74° 💧 None 💨 3 mph H 53%29.97 inHg

8:00 PM

Mostly clear night

65° 💧 None 💨 2 mph H 85%30.00 inHg

11:00 PM

Mostly cloudy night

62° 💧 None 💨 5 mph H 82%30.03 inHg

Saturday

2:00 AM

Partly cloudy night

59° 💧 None 💨 5 mph H 85%30.00 inHg

5:00 AM

Partly cloudy night

59° 💧 None 💨 5 mph H 88%30.00 inHg

8:00 AM

Partly cloudy

62° 💧 None 💨 6 mph H 87%30.03 inHg

11:00 AM

Sunny

74° 💧 None 💨 6 mph H 78%30.00 inHg

2:00 PM

Light rain

78° 💧 None 💨 9 mph H 73%29.97 inHg

5:00 PM

Light rain

78° 💧 None 💨 8 mph H 76%29.94 inHg

8:00 PM

Moderate rain

69° 💧 None 💨 8 mph H 97%29.97 inHg

11:00 PM

Light rain

68° 💧 None 💨 7 mph H 98%30.00 inHg

Sunday

2:00 AM

Partly cloudy night

67° 💧 None 💨 6 mph H 99%30.00 inHg

5:00 AM

Overcast night

68° 💧 None 💨 4 mph H 99%30.00 inHg

8:00 AM

Overcast

69° 💧 None 💨 5 mph H 100%30.03 inHg

11:00 AM

Partly cloudy

74° 💧 None 💨 6 mph H 86%30.06 inHg

2:00 PM

Light thunderstorms

78° 💧 None 💨 6 mph H 73%30.03 inHg

5:00 PM

Light rain

78° 💧 None 💨 6 mph H 77%30.00 inHg

8:00 PM

Clear night

69° 💧 None 💨 5 mph H 95%30.06 inHg

11:00 PM

Partly cloudy night

64° 💧 None 💨 4 mph H 96%30.12 inHg

Monday

2:00 AM

Clear night

60° 💧 None 💨 4 mph H 98%30.12 inHg

8:00 AM

Sunny

62° 💧 None 💨 6 mph H 97%30.09 inHg

2:00 PM

Sunny

59° 💧 None 💨 6 mph H 96%30.15 inHg

8:00 PM

Overcast night

73° 💧 None 💨 3 mph H 63%30.18 inHg

Tuesday

2:00 AM

Overcast night

67° 💧 None 💨 3 mph H 84%30.12 inHg

8:00 AM

Mostly cloudy

63° 💧 None 💨 8 mph H 82%30.12 inHg

2:00 PM

Mostly cloudy

65° 💧 None 💨 8 mph H 86%30.12 inHg

8:00 PM

Mostly clear night

85° 💧 None 💨 11 mph H 66%30.09 inHg

Wednesday

2:00 AM

Overcast night

77° 💧 None 💨 7 mph H 89%30.09 inHg

8:00 AM

Light rain

69° 💧 None 💨 5 mph H 99%30.18 inHg

2:00 PM

Overcast

69° 💧 None 💨 5 mph H 99%30.24 inHg

8:00 PM

Clear night

77° 💧 None 💨 5 mph H 62%30.27 inHg

Thursday

2:00 AM

Mostly cloudy night

68° 💧 None 💨 9 mph H 82%30.27 inHg

8:00 AM

Overcast

61° 💧 None 💨 6 mph H 95%30.27 inHg

2:00 PM

Overcast

61° 💧 None 💨 5 mph H 94%30.24 inHg

8:00 PM

Light rain

70° 💧 None 💨 2 mph H 68%30.18 inHg

Friday

2:00 AM

Overcast night

63° 💧 None 💨 10 mph H 91%30.09 inHg

8:00 AM

Sunny

58° 💧 None 💨 10 mph H 87%30.12 inHg

2:00 PM

Partly cloudy

53° 💧 None 💨 11 mph H 79%30.27 inHg

8:00 PM

Partly cloudy night

57° 💧 None 💨 12 mph H 55%30.30 inHg

Saturday

2:00 AM

Clear night

50° 💧 None 💨 5 mph H 66%30.33 inHg

8:00 AM

Sunny

45° 💧 None 💨 4 mph H 83%30.33 inHg

2:00 PM

Sunny

45° 💧 None 💨 4 mph H 84%30.39 inHg

8:00 PM

Overcast night

62° 💧 None 💨 3 mph H 53%30.30 inHg

Sunday

2:00 AM

Clear night

55° 💧 None 💨 2 mph H 76%30.24 inHg

8:00 AM

Mostly cloudy

47° 💧 None 💨 4 mph H 93%30.24 inHg

2:00 PM

Sunny

48° 💧 None 💨 4 mph H 93%30.24 inHg

8:00 PM

Mostly clear night

68° 💧 None 💨 4 mph H 55%30.18 inHg

Monday

2:00 AM

Mostly clear night

60° 💧 None 💨 5 mph H 79%30.15 inHg

8:00 AM

Mostly sunny

53° 💧 None 💨 4 mph H 90%30.12 inHg

2:00 PM

Mostly sunny

53° 💧 None 💨 6 mph H 86%30.15 inHg

8:00 PM

Partly cloudy night

73° 💧 None 💨 11 mph H 52%30.06 inHg

Tuesday

2:00 AM

Overcast night

69° 💧 None 💨 6 mph H 67%30.00 inHg

8:00 AM

Overcast

67° 💧 None 💨 7 mph H 68%29.97 inHg

2:00 PM

Overcast

62° 💧 None 💨 6 mph H 90%30.00 inHg

8:00 PM

Mostly cloudy night

72° 💧 None 💨 10 mph H 60%29.97 inHg

Wednesday

2:00 AM

Clear night

64° 💧 None 💨 4 mph H 79%29.97 inHg

In South New Castle and, more broadly, across the state of Pennsylvania: As the afternoon comes to a close, mostly cloudy skies will persist with temperatures gradually cooling from the high of around 79 degrees to the low 64s by evening. Winds will remain light from the east, generally around 3 mph, with occasional gusts up to 2 mph. No rain is expected tonight, allowing for a dry and mild evening. Temperatures will stay relatively steady, providing comfortable conditions for outdoor activities. Overall, the evening will be calm with continued cloud cover and no significant weather threats.

15-Day Weather Outlook for South New Castle

TomorrowTomorrow

Overcast 85°/67° 💧 None 💨 13 mph

Thursday, Sep 10Thu Sep 10

Light thunderstorms 79°/69° 💧 None 💨 12 mph

Friday, Sep 11Fri Sep 11

Mostly cloudy 74°/58° 💧 0.001 in 💨 5 mph

Saturday, Sep 12Sat Sep 12

Light rain 78°/59° 💧 0.051 in 💨 9 mph

Sunday, Sep 13Sun Sep 13

Light thunderstorms 78°/67° 💧 0.244 in 💨 8 mph

Monday, Sep 14Mon Sep 14

Partly cloudy 69°/59° 💧 0.831 in 💨 6 mph

Tuesday, Sep 15Tue Sep 15

Overcast 73°/63° 💧 None 💨 8 mph

Wednesday, Sep 16Wed Sep 16

Light rain 85°/69° 💧 0.657 in 💨 11 mph

Thursday, Sep 17Thu Sep 17

Mostly cloudy 77°/61° 💧 0.174 in 💨 9 mph

Friday, Sep 18Fri Sep 18

Light rain 70°/53° 💧 0.215 in 💨 11 mph

Saturday, Sep 19Sat Sep 19

Partly cloudy 57°/45° 💧 None 💨 12 mph

Sunday, Sep 20Sun Sep 20

Overcast 62°/47° 💧 None 💨 4 mph

Monday, Sep 21Mon Sep 21

Mostly sunny 68°/53° 💧 0.001 in 💨 6 mph

Tuesday, Sep 22Tue Sep 22

Overcast 73°/62° 💧 0.019 in 💨 11 mph

Wednesday, Sep 23Wed Sep 23

Mostly cloudy 72°/64° 💧 0.001 in 💨 10 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in South New Castle

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for South New Castle

Hourly forecast · Updated every 2 hours

Fair

Nearest forecast value 4:00 PM

PM2.5 Fine particles Good 5,9µg/m³

Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.

PM10 Particulate matter Good 6,3µg/m³

Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.

O₃ Ozone Fair 96,7µg/m³

Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.

NO₂ Nitrogen dioxide Good 1,4µg/m³

A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.

Air quality is acceptable for most people.

UV & HEALTH

UV, Sun & Health Outlook in South New Castle

Maximum daily UV Today, tomorrow and the following day show the maximum UV index forecast for each day.

0–2 Low 3–5 Moderate 6–7 High 8–10 Very high 11+ Extreme

Today UV 6,9High 🙂Fair

Tomorrow UV 7,3High 🙂Fair

Thursday UV 5,5Moderate 🙂Fair

Friday UV 6,7High 🙂Fair

Saturday UV 7,0High 🙂Fair

Sunday UV 7,0High —Unavailable

Monday UV 6,0High —Unavailable

Hourly UV index today

4:00 PMUV 3,7 5:00 PMUV 1,7 6:00 PMUV 0,6 7:00 PMUV 0,1

Today's weather health advice Open today's recommendations.

Strong UV exposure

Protect exposed skin with SPF 30+ sunscreen, wear sunglasses, and try to limit direct midday sun.

Acceptable air quality

Air quality is acceptable for most people. Very sensitive people may want to reduce prolonged exertion.

Stay hydrated

Drink water regularly, especially during physical activity or prolonged sun exposure.

Good conditions for outdoor activities

Outdoor activities can generally be enjoyed normally, with sun protection adjusted to the UV level.

WIND OUTLOOK

Hourly Wind Forecast for South New Castle

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · SOUTH NEW CASTLE, PENNSYLVANIA

Tonight's Stargazing & Shooting Stars

Good observing conditions. Best local viewing window: 3:00 AM–4:00 AM.

79/100Best-hour score

BEST TIME TONIGHT 3:00 AM–4:00 AM Astronomical darkness: 9:17 PM–5:21 AM

☁ Cloud cover 29% Real hourly forecast for the best viewing hour.

☾ Moonlight 7% Waning Crescent · Moon below the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 64° high at the best hour.

✦ Estimated visible meteors 1–4/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min70%

UPCOMING METEOR PERIODSStart, peak and end dates · weather should be checked closer to the peak.

SEP 5–SEP 21

September ε-PerseidsStart SEP 5 · Peak SEP 9 · End SEP 21 · ZHR 8 · 6% Moon at peak

ACTIVE NOW

SEP 20–NOV 20

Southern TauridsStart SEP 20 · Peak NOV 5 · End NOV 20 · ZHR 7 · 20% Moon at peak

UPCOMING

OCT 2–NOV 7

OrionidsStart OCT 2 · Peak OCT 21 · End NOV 7 · ZHR 20 · 77% Moon at peak

UPCOMING

OCT 20–DEC 10

Northern TauridsStart OCT 20 · Peak NOV 12 · End DEC 10 · ZHR 5 · 7% Moon at peak

UPCOMING

Experimental local observing estimate. Weather values come from the hourly forecast already used on this page. Moon position and astronomical darkness are calculated locally from time and coordinates. Meteor-shower ZHR describes ideal conditions and is not the number of meteors a person should expect to see locally.

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Forecast data for South New Castle were last refreshed today at 3:17 PM. The current forecast period extends through 10/09/2026 at 1:00 PM. Weather, air-quality and UV-index data are provided through WEATHER-INFO.COM. Forecasts are produced automatically from the latest available data and are subject to periodic technical checks. This service is intended for general weather information.