Castle Shannon and Washington have remarkably similar climates.
The year at a glance
Averages from 30 years of climate history, 1991-2020
| Castle Shannon | Metric | Washington |
|---|---|---|
| 161 days | Sunny daysclear or partly cloudy skies | 163 days |
| 49 in | Precipitationper year | 46 in |
| 158 days | Wet daysrain or snow per year | 153 days |
| 29 in | Snowfallper year | 32 in |
| 10 days | Hot daysabove 90 °F | 7 days |
| 107 days | Freezing nightsat or below 32 °F | 121 days |
| 73% | Humidityaverage relative | 72% |
| 52 °F | Average temperatureyear round | 52 °F |
Monthly temperatures
Average daily high and low for each month, in °F. The gap between the two lines is what an ordinary day feels like across the year.
Daily highs
Daily lows
View monthly temperatures as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Castle Shannon high | 37 | 40 | 50 | 63 | 72 | 80 | 84 | 82 | 76 | 64 | 52 | 42 |
| Washington high | 37 | 40 | 49 | 63 | 72 | 80 | 83 | 83 | 76 | 64 | 52 | 41 |
| Castle Shannon low | 22 | 23 | 30 | 41 | 51 | 59 | 64 | 62 | 55 | 44 | 35 | 27 |
| Washington low | 20 | 22 | 29 | 40 | 49 | 58 | 62 | 60 | 54 | 43 | 33 | 26 |
Monthly precipitation
Total rain plus melted snow for each month, in inches. Taller bars mean wetter months.
View monthly precipitation as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Castle Shannon | 3.6 | 3.2 | 4.4 | 4.6 | 5.0 | 5.2 | 5.0 | 3.8 | 3.9 | 3.6 | 3.5 | 3.5 |
| Washington | 3.5 | 3.1 | 4.3 | 4.4 | 4.7 | 4.7 | 4.5 | 3.4 | 3.7 | 3.4 | 3.4 | 3.4 |
Monthly sunny days
Days each month with clear or partly cloudy skies, so compare the same month between cities.
View monthly sunny days as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Castle Shannon | 8 | 8 | 12 | 13 | 14 | 16 | 18 | 19 | 18 | 16 | 12 | 8 |
| Washington | 8 | 8 | 12 | 13 | 14 | 16 | 18 | 19 | 18 | 16 | 12 | 8 |
Keep comparing
Nearby cities and popular picks for each side of this matchup. Any two cities can be compared from the home page.
Castle Shannon vs another city
- Castle Shannon vs Whitehall, PA
- Castle Shannon vs Dormont, PA
- Castle Shannon vs Brentwood, PA
- Castle Shannon vs Bethel Park, PA
- Castle Shannon vs Baldwin, PA
- Castle Shannon vs Pleasant Hills, PA
- Castle Shannon vs New York, NY
- Castle Shannon vs Los Angeles, CA
- Castle Shannon vs Chicago, IL
- Castle Shannon vs Houston, TX
- Castle Shannon vs Phoenix, AZ
- Castle Shannon vs Philadelphia, PA
Washington vs another city
- Washington vs Canonsburg, PA
- Washington vs Bethel Park, PA
- Washington vs Jefferson Hills, PA
- Washington vs Carnegie, PA
- Washington vs Pleasant Hills, PA
- Washington vs New York, NY
- Washington vs Los Angeles, CA
- Washington vs Chicago, IL
- Washington vs Houston, TX
- Washington vs Phoenix, AZ
- Washington vs Philadelphia, PA
About this data
Every figure on this page is a 30 year average computed from daily climate history for 1991-2020, using each city's own coordinates. 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).