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New Castle (PA) Weather and Climate: A Comprehensive Guide

The temperature in New Castle can vary quite a bit throughout the year. Temperatures can be warm during the warmest months, and very cold during the cooler months. It is also known for its large amounts of rain/snowfall. Let’s explore the climate details in depth to provide you with a complete overview.

Average maximum day and minimum night temperature

Visitors to New Castle can expect significant temperature changes throughout the year. Typically, average maximum daytime temperatures range from a comfortable 29°C in July to a very cold 2°C in the coolest month, February.

Nights are cooler, with lows often dropping to around -9°C during the colder months. Check out our detailed temperature page for more information.

Temperature ranges by month

Precipitation and rainy days

New Castle is known for its substantial rain/snowfall, with annual precipitation reaching 1075 mm. New Castle offers a pleasant mix of wetter and slightly drier months. The difference in precipitation between June (122 mm) and November (62 mm) is not too significant, making the climate enjoyable for visitors and residents alike.

The mean monthly precipitation over the year, including rain, hail and snow

Sunshine over the year

For those who appreciate different seasons, New Castle serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 8.5 hours of sunshine daily, and embrace the darker days in December, offering only 2.4 hours of daily sunlight. Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Data from: Pittsburgh, the United States of America (57 KM, 35 Miles).

Daily hours of sunshine

Data from: Pittsburgh, the United States of America (57 KM, 35 Miles).

Forecast for New Castle (PA)

Sun   Dec 22
-4°C | -10°C
W 2 m/s
broken clouds and no rain

broken clouds and no rain

Mon   Dec 23
4°C | -10°C
S 3 m/s
1.7 mm
broken clouds and no rain

broken clouds and no rain

Tue   Dec 24
3°C | 0°C
SW 2 m/s
1 mm
overcast and slight rain

overcast and slight rain

The best time of year to visit New Castle in the United States of America

During the months of May and September you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.

Other facts from our historical weather data:
  • When is summer in New Castle?
    The hottest season / summer takes place in June, July, August and September.
  • Which is the warmest month in New Castle?
    July has an average maximum temperature of 29°C and is the warmest month of the year.
  • Which is the coldest month in New Castle?
    The coldest month is February with an average maximum temperature of 2°C.
  • Which is the wettest month in New Castle?
    June tops the wettest month list with 122 mm of rainfall.
  • Which is the driest month in New Castle?
    November is the driest month with 62 mm of precipitation.
  • Which is the sunniest month in New Castle?
    July is the sunniest month with an average of 255 hours of sunshine.

  • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.