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Allison Park, Pennsylvania climate
Cfa Humid subtropical
Allison Park has a seasonal cool-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is July with an average daily high near 83°F, while the coldest is January averaging around 21°F at night. Precipitation is fairly even year-round, totalling about 40 inches. Winters bring significant snowfall (44 inches of snow per year on average).
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation split into rain and snow · 1991–2020 normals · hover a month for the exact figuresClear vs cloudy days
Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day countsAllison Park climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 36 | 40 | 49 | 62 | 72 | 79 | 83 | 82 | 75 | 63 | 51 | 41 |
| Avg temp (°F) | 29 | 31 | 40 | 52 | 61 | 69 | 73 | 72 | 65 | 53 | 43 | 34 |
| Avg low (°F) | 21 | 23 | 30 | 41 | 51 | 59 | 63 | 62 | 55 | 44 | 34 | 27 |
| Precipitation (in) | 3.0 | 2.6 | 3.2 | 3.3 | 3.8 | 4.1 | 4.3 | 3.5 | 3.3 | 2.8 | 2.9 | 2.8 |
| Snowfall (in) | 13.3 | 11.7 | 7.6 | 1.0 | — | — | — | — | — | 0.4 | 2.4 | 7.7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 36 | 40 | 49 | 62 | 72 | 79 |
| Avg temp (°F) | 29 | 31 | 40 | 52 | 61 | 69 |
| Avg low (°F) | 21 | 23 | 30 | 41 | 51 | 59 |
| Precipitation (in) | 3.0 | 2.6 | 3.2 | 3.3 | 3.8 | 4.1 |
| Snowfall (in) | 13.3 | 11.7 | 7.6 | 1.0 | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 83 | 82 | 75 | 63 | 51 | 41 |
| Avg temp (°F) | 73 | 72 | 65 | 53 | 43 | 34 |
| Avg low (°F) | 63 | 62 | 55 | 44 | 34 | 27 |
| Precipitation (in) | 4.3 | 3.5 | 3.3 | 2.8 | 2.9 | 2.8 |
| Snowfall (in) | — | — | — | 0.4 | 2.4 | 7.7 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 17 | 14 | 14 | 14 | 14 | 12 | 11 | 11 | 10 | 11 | 12 | 15 |
| Days with high ≥ 90°F (days) | — | — | — | — | 0.3 | 2 | 4 | 3 | 0.9 | — | — | — |
| Days with low ≤ 32°F (days) | 25 | 23 | 19 | 6 | 0.5 | — | — | — | — | 2 | 14 | 23 |
| Days with snowfall ≥ 1 in (days) | 4 | 4 | 2 | 0.3 | — | — | — | — | — | 0.1 | 0.7 | 3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 17 | 14 | 14 | 14 | 14 | 12 |
| Days with high ≥ 90°F (days) | — | — | — | — | 0.3 | 2 |
| Days with low ≤ 32°F (days) | 25 | 23 | 19 | 6 | 0.5 | — |
| Days with snowfall ≥ 1 in (days) | 4 | 4 | 2 | 0.3 | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 11 | 11 | 10 | 11 | 12 | 15 |
| Days with high ≥ 90°F (days) | 4 | 3 | 0.9 | — | — | — |
| Days with low ≤ 32°F (days) | — | — | — | 2 | 14 | 23 |
| Days with snowfall ≥ 1 in (days) | — | — | — | 0.1 | 0.7 | 3 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 76 | 75 | 71 | 70 | 68 | 62 | 57 | 56 | 54 | 62 | 69 | 76 |
| Clear days (≤ 30% cloud) | 2 | 2 | 4 | 4 | 4 | 5 | 7 | 7 | 9 | 6 | 4 | 2 |
| Partly cloudy days (30–70%) | 8 | 8 | 8 | 8 | 10 | 12 | 12 | 13 | 10 | 9 | 8 | 8 |
| Cloudy days (≥ 70%) | 21 | 18 | 19 | 18 | 17 | 13 | 12 | 11 | 11 | 15 | 18 | 21 |
| Relative humidity (%) | 88 | 86 | 82 | 78 | 78 | 76 | 71 | 68 | 70 | 75 | 81 | 86 |
| Wind speed (mph) | 1.6 | 1.9 | 1.4 | 0.6 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 76 | 75 | 71 | 70 | 68 | 62 |
| Clear days (≤ 30% cloud) | 2 | 2 | 4 | 4 | 4 | 5 |
| Partly cloudy days (30–70%) | 8 | 8 | 8 | 8 | 10 | 12 |
| Cloudy days (≥ 70%) | 21 | 18 | 19 | 18 | 17 | 13 |
| Relative humidity (%) | 88 | 86 | 82 | 78 | 78 | 76 |
| Wind speed (mph) | 1.6 | 1.9 | 1.4 | 0.6 | 0.4 | 0.4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 57 | 56 | 54 | 62 | 69 | 76 |
| Clear days (≤ 30% cloud) | 7 | 7 | 9 | 6 | 4 | 2 |
| Partly cloudy days (30–70%) | 12 | 13 | 10 | 9 | 8 | 8 |
| Cloudy days (≥ 70%) | 12 | 11 | 11 | 15 | 18 | 21 |
| Relative humidity (%) | 71 | 68 | 70 | 75 | 81 | 86 |
| Wind speed (mph) | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.9 |
30-year delta table (1991–2020 minus 1981–2010, °F)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Δ Max temp | +0.6 | +0.3 | -0.1 | +0.7 | +1.1 | +0.3 | +0.4 | +0.3 | +0.8 | +0.5 | -0.3 | +1.2 |
| Δ Avg temp | +0.4 | +0.3 | +0.1 | +0.6 | +1.1 | +0.7 | +0.6 | +0.3 | +0.8 | +0.7 | -0.3 | +1.3 |
| Δ Min temp | +0.3 | +0.2 | +0.3 | +0.5 | +1.3 | +0.9 | +0.6 | +0.5 | +0.8 | +0.8 | -0.4 | +1.4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Δ Max temp | +0.6 | +0.3 | -0.1 | +0.7 | +1.1 | +0.3 |
| Δ Avg temp | +0.4 | +0.3 | +0.1 | +0.6 | +1.1 | +0.7 |
| Δ Min temp | +0.3 | +0.2 | +0.3 | +0.5 | +1.3 | +0.9 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Δ Max temp | +0.4 | +0.3 | +0.8 | +0.5 | -0.3 | +1.2 |
| Δ Avg temp | +0.6 | +0.3 | +0.8 | +0.7 | -0.3 | +1.3 |
| Δ Min temp | +0.6 | +0.5 | +0.8 | +0.8 | -0.4 | +1.4 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Pittsburgh Asos (NOAA GHCN station USW00094823), about 23 km from the city centre.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.