New Castle climate

Typical historical weather for New Castle, United States, averaged across 10 years of hourly climate data. Pick a date for a specific day.

Want today's actual conditions instead? See the current forecast for New Castle.

Annual average

11.1°C

across all months

Warmest month

28.1°C

Jul average high

Coolest month

-5.5°C

Jan average low

Annual rainfall

1333mm

total per year

Monthly averages

Average daily high/low temperature (band) and monthly rainfall (bars).

● Avg high● Avg low▮ Rainfall

Records on file

Hottest day

34.1°C

6 July 2020

Coldest day

-27.3°C

22 January 2025

Wettest day

97.1mm

9 September 2018

Windiest day

7.8m/s

29 December 2025