| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | -5° | -13.3° | 25.9mm | 9.1 | 12 |
| February | -2.8° | -11.9° | 27.4mm | 7.8 | 14 |
| March | 4.6° | -4.5° | 52.6mm | 9.9 | 21 |
| April | 13° | 1.9° | 86.5mm | 12.2 | 53 |
| May | 20.1° | 8.5° | 114mm | 13.3 | 73 |
| June | 25.5° | 14.4° | 138.2mm | 12.7 | 75 |
| July | 27.1° | 16.2° | 104.4mm | 10.1 | 79 |
| August | 25.7° | 14.9° | 105.5mm | 10.3 | 79 |
| September | 22.6° | 10.6° | 85.7mm | 8.7 | 83 |
| October | 14.8° | 3.7° | 63.7mm | 9.7 | 64 |
| November | 5.8° | -3.2° | 39.9mm | 8.8 | 29 |
| December | -2° | -9.9° | 33.8mm | 9.6 | 11 |
January in Rochester averages a daily high of -5°C with nights around -13.3°C. Expect roughly 9.1 wet days totalling 25.9mm. A hard month to visit for comfort alone.
February in Rochester averages a daily high of -2.8°C with nights around -11.9°C. Expect roughly 7.8 wet days totalling 27.4mm. A hard month to visit for comfort alone.
March in Rochester averages a daily high of 4.6°C with nights around -4.5°C. Expect roughly 9.9 wet days totalling 52.6mm. A hard month to visit for comfort alone.
April in Rochester averages a daily high of 13°C with nights around 1.9°C. Expect roughly 12.2 wet days totalling 86.5mm. Demanding conditions — pack for it and plan indoor options.
May in Rochester averages a daily high of 20.1°C with nights around 8.5°C. Expect roughly 13.3 wet days totalling 114mm. Generally workable, with some weather to plan around.
June in Rochester averages a daily high of 25.5°C with nights around 14.4°C. Expect roughly 12.7 wet days totalling 138.2mm. Comfortable conditions for being outdoors all day.
July in Rochester averages a daily high of 27.1°C with nights around 16.2°C. Expect roughly 10.1 wet days totalling 104.4mm. Comfortable conditions for being outdoors all day.
August in Rochester averages a daily high of 25.7°C with nights around 14.9°C. Expect roughly 10.3 wet days totalling 105.5mm. Comfortable conditions for being outdoors all day.
September in Rochester averages a daily high of 22.6°C with nights around 10.6°C. Expect roughly 8.7 wet days totalling 85.7mm. Comfortable conditions for being outdoors all day.
October in Rochester averages a daily high of 14.8°C with nights around 3.7°C. Expect roughly 9.7 wet days totalling 63.7mm. Generally workable, with some weather to plan around.
November in Rochester averages a daily high of 5.8°C with nights around -3.2°C. Expect roughly 8.8 wet days totalling 39.9mm. A hard month to visit for comfort alone.
December in Rochester averages a daily high of -2°C with nights around -9.9°C. Expect roughly 9.6 wet days totalling 33.8mm. 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. Rochester peaks at 83.
Based on 30 years of records, June–September scores highest for comfort in Rochester, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 27.1°C.
June is the wettest, averaging 138.2mm of rain across roughly 12.7 wet days.
January is the coolest month, with average daily highs around -5°C.