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Castle Shannon, PA weather and climate

Allegheny County, PA · population 8,237 · about 1,076 ft elevation

Everything below is a 30 year average for 1991-2020, computed from daily climate history at Castle Shannon's own coordinates.

The year at a glance

Sunny days
161
clear or partly cloudy, per year
Precipitation
49 in
per year
Wet days
158
rain or snow per year
Snowfall
29 in
per year
Hot days
10
above 90 °F
Freezing nights
107
at or below 32 °F
Humidity
73%
average relative
Average temperature
52 °F
year round

Monthly temperatures

Average daily high and low for each month, in °F.

Daily highDaily low
20406080JanMarMayJulSepNovDaily high, Jan: 37 °FDaily high, Feb: 40 °FDaily high, Mar: 50 °FDaily high, Apr: 63 °FDaily high, May: 72 °FDaily high, Jun: 80 °FDaily high, Jul: 84 °FDaily high, Aug: 82 °FDaily high, Sep: 76 °FDaily high, Oct: 64 °FDaily high, Nov: 52 °FDaily high, Dec: 42 °FDaily low, Jan: 22 °FDaily low, Feb: 23 °FDaily low, Mar: 30 °FDaily low, Apr: 41 °FDaily low, May: 51 °FDaily low, Jun: 59 °FDaily low, Jul: 64 °FDaily low, Aug: 62 °FDaily low, Sep: 55 °FDaily low, Oct: 44 °FDaily low, Nov: 35 °FDaily low, Dec: 27 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Daily high374050637280848276645242
Daily low222330415159646255443527

Monthly precipitation

Total rain plus melted snow for each month, in inches.

0.02.04.0JanMarMayJulSepNovCastle Shannon, Jan: 3.6 inCastle Shannon, Feb: 3.2 inCastle Shannon, Mar: 4.4 inCastle Shannon, Apr: 4.6 inCastle Shannon, May: 5.0 inCastle Shannon, Jun: 5.2 inCastle Shannon, Jul: 5.0 inCastle Shannon, Aug: 3.8 inCastle Shannon, Sep: 3.9 inCastle Shannon, Oct: 3.6 inCastle Shannon, Nov: 3.5 inCastle Shannon, Dec: 3.5 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Castle Shannon3.63.24.44.65.05.25.03.83.93.63.53.5

Monthly sunny days

Days each month with clear or partly cloudy skies.

01020JanMarMayJulSepNovCastle Shannon, Jan: 8 daysCastle Shannon, Feb: 8 daysCastle Shannon, Mar: 12 daysCastle Shannon, Apr: 13 daysCastle Shannon, May: 14 daysCastle Shannon, Jun: 16 daysCastle Shannon, Jul: 18 daysCastle Shannon, Aug: 19 daysCastle Shannon, Sep: 18 daysCastle Shannon, Oct: 16 daysCastle Shannon, Nov: 12 daysCastle Shannon, Dec: 8 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Castle Shannon881213141618191816128

Compare Castle Shannon with another city

Nearby cities and popular picks. Any two cities can be compared from the home page.

See weather for every covered Pennsylvania city

About this data

Figures are 30 year averages for 1991-2020. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.

Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).