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Harleysville CDP, Pennsylvania

Official LSAD Designation: Harleysville CDP • Census GEOID: 4232616 • Montgomery County

Climate Normals & Weather Observations

30-year climate normals (1991–2020) and weather observations for Harleysville CDP.

Reference Weather Station: GRATERFORD 1 E, PA US (ID: USC00363437) • Located 3.9 miles from community center • Elevation: 85.0 m
Month Average High (°F) Average Low (°F) Mean Temp (°F) Precipitation (in)
January 39.7° 20.3° 30.0° 3.32"
February 42.2° 22.0° 32.1° 2.63"
March 50.0° 29.0° 39.5° 3.89"
April 62.1° 38.8° 50.5° 3.80"
May 72.2° 49.2° 60.7° 3.99"
June 81.3° 59.0° 70.1° 4.21"
July 86.0° 63.9° 75.0° 4.97"
August 84.4° 61.2° 72.8° 4.56"
September 78.1° 52.6° 65.4° 4.90"
October 66.2° 41.3° 53.7° 4.52"
November 55.0° 32.4° 43.7° 3.35"
December 44.8° 25.2° 35.0° 4.38"

Annual Temperature History

2010–2025, completed calendar years only.

NOAA station GRATERFORD 1 E, PA US (ID: USC00363437) • 3.9 miles from community center .

This is the same reference station used for monthly normals.

Annual mean Annual mean of daily highs Annual mean of daily lows
Annual temperature history at GRATERFORD 1 E, 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) 2011: Annual mean 52.8°F 2012: Annual mean 53.7°F 2013: Annual mean 51.5°F 2014: Annual mean 50.0°F 2015: Annual mean 52.3°F 2016: Annual mean 53.7°F 2017: Annual mean 53.0°F 2018: Annual mean 52.9°F 2011: Annual mean of daily highs 63.0°F 2012: Annual mean of daily highs 64.0°F 2013: Annual mean of daily highs 61.7°F 2014: Annual mean of daily highs 60.5°F 2015: Annual mean of daily highs 63.1°F 2016: Annual mean of daily highs 65.1°F 2017: Annual mean of daily highs 63.6°F 2018: Annual mean of daily highs 63.1°F 2011: Annual mean of daily lows 42.7°F 2012: Annual mean of daily lows 43.4°F 2013: Annual mean of daily lows 41.2°F 2014: Annual mean of daily lows 39.4°F 2015: Annual mean of daily lows 41.4°F 2016: Annual mean of daily lows 42.4°F 2017: Annual mean of daily lows 42.4°F 2018: Annual mean of daily lows 42.8°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 52.8 63.0 42.7
2012 53.7 64.0 43.4
2013 51.5 61.7 41.2
2014 50.0 60.5 39.4
2015 52.3 63.1 41.4
2016 53.7 65.1 42.4
2017 53.0 63.6 42.4
2018 52.9 63.1 42.8
2019 Unavailable Unavailable Unavailable
2020 Unavailable Unavailable Unavailable
2021 Unavailable Unavailable Unavailable
2022 Unavailable Unavailable Unavailable
2023 Unavailable Unavailable Unavailable
2024 Unavailable Unavailable Unavailable
2025 Unavailable Unavailable Unavailable
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.