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Derry borough, Pennsylvania

Official LSAD Designation: Derry borough • Census GEOID: 4218960 • Westmoreland County

Climate Normals & Weather Observations

30-year climate normals (1991–2020) and weather observations for Derry borough.

Reference Weather Station: LAUREL MTN, PA US (ID: USC00364836) • Located 11.0 miles from community center • Elevation: 841.2 m
Month Average High (°F) Average Low (°F) Mean Temp (°F) Precipitation (in)
January 35.7° 18.8° 27.2° 4.13"
February 38.7° 20.4° 29.6° 3.26"
March 47.9° 27.4° 37.6° 4.33"
April 60.7° 38.4° 49.6° 4.57"
May 69.4° 47.9° 58.7° 4.49"
June 76.1° 56.6° 66.4° 4.99"
July 79.8° 60.6° 70.2° 4.73"
August 78.2° 59.2° 68.7° 3.97"
September 71.6° 51.7° 61.6° 4.43"
October 62.1° 41.1° 51.6° 3.62"
November 49.8° 33.1° 41.5° 3.40"
December 40.5° 25.6° 33.0° 3.64"

Annual Temperature History

2010–2025, completed calendar years only.

NOAA station LOYALHANNA LAKE, PA US (ID: USC00365212) • 11.7 miles from community center .

This annual reference station differs from the monthly normals station (ID: USC00364836), which has no available annual mean history.

Annual mean Annual mean of daily highs Annual mean of daily lows
Annual temperature history at LOYALHANNA LAKE, PA US Year is the horizontal axis. Annual mean temperature in degrees Fahrenheit is the vertical axis. Dots show recorded years; lines connect consecutive available years only. Missing years are gaps, with no interpolation. Optional dashed lines show annual mean of daily highs and lows. Exact values appear in the data table below. 36.0 44.0 52.0 60.0 68.0 2010 2014 2018 2021 2025 Year Annual mean temperature (°F) 2017: Annual mean 51.4°F 2019: Annual mean 50.7°F 2024: Annual mean 53.7°F 2017: Annual mean of daily highs 62.7°F 2019: Annual mean of daily highs 62.0°F 2024: Annual mean of daily highs 65.3°F 2017: Annual mean of daily lows 40.0°F 2019: Annual mean of daily lows 39.4°F 2024: Annual mean of daily lows 42.0°F

Source: NOAA NCEI Global Summary of the Year.

Annual temperature data table (°F)
Annual station temperatures, 2010–2025. Unavailable means no reported value.
Year Annual mean (°F) Annual mean of daily highs (°F) Annual mean of daily lows (°F)
2010 Unavailable Unavailable Unavailable
2011 Unavailable Unavailable Unavailable
2012 Unavailable Unavailable Unavailable
2013 Unavailable Unavailable Unavailable
2014 Unavailable Unavailable Unavailable
2015 Unavailable Unavailable Unavailable
2016 Unavailable Unavailable Unavailable
2017 51.4 62.7 40.0
2018 Unavailable Unavailable Unavailable
2019 50.7 62.0 39.4
2020 Unavailable Unavailable Unavailable
2021 Unavailable Unavailable Unavailable
2022 Unavailable Unavailable Unavailable
2023 Unavailable Unavailable Unavailable
2024 53.7 65.3 42.0
2025 Unavailable Unavailable Unavailable
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.