New Castle

Whatcom County, Pennsylvania, United States

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Current Weather

18°

Clear

Feels Like: 19°

Min: 18°

Max: 30°

The next few hours will be clear, with today reaching 30°C and dropping to 21°C. The coming days will be mostly cloudy throughout the day.

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Hourly Forecast

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Today
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Daylight Hours

07:09

Sunrise

19:21

Sunset

12 hours 12 minutes of sunlight today

Moon

Waxing Crescent

13:03

Moonrise

21:25

Moonset

Daily Forecast

Today

18°
30°

Thursday

20°
27°

Friday

16°
25°

Saturday

14°
25°

Sunday

18°
24°

Monday

17°
24°

Tuesday

17°
24°

Wednesday

17°
25°

Thursday

16°
24°

Friday

16°
20°

Air Quality Data Available

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UV Index

No protection needed
0 Low
Low Extreme

Humidity

91% Very Humid
Low High

Weather in New Castle today, September 16, 2026

Expect a muted, overcast feel in New Castle on September 16, 2026 as cloud persists. Brighter breaks, if they arrive, should stay brief. The morning looks comparatively open, with cloud near 36% around 09:00. Early outdoor plans have a better chance of staying dry and bright.

Temperatures climb from an overnight low near 18°C toward a daytime high of about 30°C. Relative humidity sits between 58% and 91%, reaching its peak around 07:00. Expect gentle winds, highest near 16:00 at 3.3 km/h.

The afternoon keeps an overcast feel, as cloud reaches about 100% around 13:00. Outdoor plans may still want a flexible backup. Expect visibility near 16.1 km, with poorer spells close to 16.0 km. Sunrise is at 07:09 and sunset at 19:21, giving 12 hours 12 minutes of sunlight today.

Overall, New Castle on September 16, 2026 stays grey and muted, so outdoor plans may want a flexible backup even with a high near 30°C.

Frequently asked questions about weather in New Castle

How warm does it get in New Castle?

The warmest month in New Castle is July, with average high temperatures of 28°C. The average temperature during this period is around 23°C.

How cold does it get in New Castle?

The coldest month in New Castle is January, with average low temperatures of -5°C. The average temperature during this period is around -2°C.

What is the wettest time of year in New Castle?

The wettest month in New Castle is May, with an average of 137mm of precipitation.

What is the driest time of year in New Castle?

The driest month in New Castle is November, with an average of 87mm of precipitation.

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Metric (°C, km/h)