| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 3.7° | -5.4° | 84.6mm | 15 | 7 |
| February | 5.5° | -5.1° | 68.5mm | 11.9 | 19 |
| March | 11° | -0.6° | 75.3mm | 11.3 | 45 |
| April | 17.6° | 4.6° | 83.1mm | 12.5 | 67 |
| May | 22.8° | 10.4° | 88.7mm | 12.4 | 75 |
| June | 27.4° | 15.4° | 90.9mm | 10.9 | 77 |
| July | 29.4° | 18° | 96.9mm | 9.9 | 71 |
| August | 28.8° | 17.1° | 86.2mm | 9.4 | 74 |
| September | 25.4° | 13.6° | 79.1mm | 8.6 | 83 |
| October | 18.7° | 7.4° | 73.8mm | 10.3 | 75 |
| November | 11.7° | 1.1° | 66.2mm | 10.5 | 51 |
| December | 5.8° | -1.8° | 73.9mm | 12.8 | 23 |
January in Pittsburgh averages a daily high of 3.7°C with nights around -5.4°C. Expect roughly 15 wet days totalling 84.6mm. A hard month to visit for comfort alone.
February in Pittsburgh averages a daily high of 5.5°C with nights around -5.1°C. Expect roughly 11.9 wet days totalling 68.5mm. A hard month to visit for comfort alone.
March in Pittsburgh averages a daily high of 11°C with nights around -0.6°C. Expect roughly 11.3 wet days totalling 75.3mm. Demanding conditions — pack for it and plan indoor options.
April in Pittsburgh averages a daily high of 17.6°C with nights around 4.6°C. Expect roughly 12.5 wet days totalling 83.1mm. Generally workable, with some weather to plan around.
May in Pittsburgh averages a daily high of 22.8°C with nights around 10.4°C. Expect roughly 12.4 wet days totalling 88.7mm. Comfortable conditions for being outdoors all day.
June in Pittsburgh averages a daily high of 27.4°C with nights around 15.4°C. Expect roughly 10.9 wet days totalling 90.9mm. Comfortable conditions for being outdoors all day.
July in Pittsburgh averages a daily high of 29.4°C with nights around 18°C. Expect roughly 9.9 wet days totalling 96.9mm. Generally workable, with some weather to plan around.
August in Pittsburgh averages a daily high of 28.8°C with nights around 17.1°C. Expect roughly 9.4 wet days totalling 86.2mm. Generally workable, with some weather to plan around.
September in Pittsburgh averages a daily high of 25.4°C with nights around 13.6°C. Expect roughly 8.6 wet days totalling 79.1mm. Comfortable conditions for being outdoors all day.
October in Pittsburgh averages a daily high of 18.7°C with nights around 7.4°C. Expect roughly 10.3 wet days totalling 73.8mm. Comfortable conditions for being outdoors all day.
November in Pittsburgh averages a daily high of 11.7°C with nights around 1.1°C. Expect roughly 10.5 wet days totalling 66.2mm. Demanding conditions — pack for it and plan indoor options.
December in Pittsburgh averages a daily high of 5.8°C with nights around -1.8°C. Expect roughly 12.8 wet days totalling 73.9mm. A hard month to visit for comfort alone.
Each month scores out of 100. It starts at 100 and loses points for daytime highs outside a 20–27°C band, for wet days, and for nights below 2°C. Nothing else is weighted in — no crowd data, no prices, no opinion. Pittsburgh peaks at 83.
Based on 30 years of records, May–June scores highest for comfort in Pittsburgh, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 29.4°C.
July is the wettest, averaging 96.9mm of rain across roughly 9.9 wet days.
January is the coolest month, with average daily highs around 3.7°C.