| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 5.4° | -1.8° | 92.2mm | 10.4 | 27 |
| February | 7.1° | -0.7° | 85.6mm | 8.9 | 37 |
| March | 12.1° | 2.9° | 106.1mm | 9.7 | 55 |
| April | 18.7° | 8.5° | 102.3mm | 11.4 | 73 |
| May | 24° | 13.9° | 111.7mm | 12.3 | 75 |
| June | 29.1° | 19.1° | 125.1mm | 10.4 | 71 |
| July | 31.8° | 22.2° | 110.1mm | 9.9 | 61 |
| August | 30.7° | 21.3° | 123.7mm | 8.9 | 67 |
| September | 26.7° | 17.5° | 114.7mm | 8.3 | 83 |
| October | 20° | 11.2° | 101.3mm | 8.4 | 83 |
| November | 13.5° | 5.4° | 77.8mm | 8.2 | 63 |
| December | 8° | 1.1° | 109.3mm | 10.3 | 40 |
January in Center City averages a daily high of 5.4°C with nights around -1.8°C. Expect roughly 10.4 wet days totalling 92.2mm. A hard month to visit for comfort alone.
February in Center City averages a daily high of 7.1°C with nights around -0.7°C. Expect roughly 8.9 wet days totalling 85.6mm. Demanding conditions — pack for it and plan indoor options.
March in Center City averages a daily high of 12.1°C with nights around 2.9°C. Expect roughly 9.7 wet days totalling 106.1mm. Generally workable, with some weather to plan around.
April in Center City averages a daily high of 18.7°C with nights around 8.5°C. Expect roughly 11.4 wet days totalling 102.3mm. Generally workable, with some weather to plan around.
May in Center City averages a daily high of 24°C with nights around 13.9°C. Expect roughly 12.3 wet days totalling 111.7mm. Comfortable conditions for being outdoors all day.
June in Center City averages a daily high of 29.1°C with nights around 19.1°C. Expect roughly 10.4 wet days totalling 125.1mm. Generally workable, with some weather to plan around.
July in Center City averages a daily high of 31.8°C with nights around 22.2°C. Expect roughly 9.9 wet days totalling 110.1mm. Generally workable, with some weather to plan around.
August in Center City averages a daily high of 30.7°C with nights around 21.3°C. Expect roughly 8.9 wet days totalling 123.7mm. Generally workable, with some weather to plan around.
September in Center City averages a daily high of 26.7°C with nights around 17.5°C. Expect roughly 8.3 wet days totalling 114.7mm. Comfortable conditions for being outdoors all day.
October in Center City averages a daily high of 20°C with nights around 11.2°C. Expect roughly 8.4 wet days totalling 101.3mm. Comfortable conditions for being outdoors all day.
November in Center City averages a daily high of 13.5°C with nights around 5.4°C. Expect roughly 8.2 wet days totalling 77.8mm. Generally workable, with some weather to plan around.
December in Center City averages a daily high of 8°C with nights around 1.1°C. Expect roughly 10.3 wet days totalling 109.3mm. Demanding conditions — pack for it and plan indoor options.
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. Center City peaks at 83.
Based on 30 years of records, September–October scores highest for comfort in Center City, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 31.8°C.
June is the wettest, averaging 125.1mm of rain across roughly 10.4 wet days.
January is the coolest month, with average daily highs around 5.4°C.