| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 0.4° | -8.6° | 68mm | 18.1 | 0 |
| February | 1° | -7.9° | 53.4mm | 14.1 | 2 |
| March | 5.8° | -3.9° | 56.8mm | 12.7 | 20 |
| April | 13.1° | 1.4° | 79.8mm | 13.4 | 50 |
| May | 20.3° | 8.3° | 76mm | 12.4 | 75 |
| June | 25.2° | 14.1° | 78mm | 11.4 | 77 |
| July | 27.6° | 16.6° | 93.7mm | 11 | 76 |
| August | 26.8° | 15.6° | 70.8mm | 10.4 | 79 |
| September | 23.2° | 11.7° | 85.9mm | 10.3 | 79 |
| October | 16.1° | 5.9° | 84.2mm | 13.8 | 60 |
| November | 9.2° | 0.2° | 71.5mm | 12.8 | 37 |
| December | 2.8° | -3.9° | 72.8mm | 16.1 | 6 |
January in Niagara Falls averages a daily high of 0.4°C with nights around -8.6°C. Expect roughly 18.1 wet days totalling 68mm. A hard month to visit for comfort alone.
February in Niagara Falls averages a daily high of 1°C with nights around -7.9°C. Expect roughly 14.1 wet days totalling 53.4mm. A hard month to visit for comfort alone.
March in Niagara Falls averages a daily high of 5.8°C with nights around -3.9°C. Expect roughly 12.7 wet days totalling 56.8mm. A hard month to visit for comfort alone.
April in Niagara Falls averages a daily high of 13.1°C with nights around 1.4°C. Expect roughly 13.4 wet days totalling 79.8mm. Demanding conditions — pack for it and plan indoor options.
May in Niagara Falls averages a daily high of 20.3°C with nights around 8.3°C. Expect roughly 12.4 wet days totalling 76mm. Comfortable conditions for being outdoors all day.
June in Niagara Falls averages a daily high of 25.2°C with nights around 14.1°C. Expect roughly 11.4 wet days totalling 78mm. Comfortable conditions for being outdoors all day.
July in Niagara Falls averages a daily high of 27.6°C with nights around 16.6°C. Expect roughly 11 wet days totalling 93.7mm. Comfortable conditions for being outdoors all day.
August in Niagara Falls averages a daily high of 26.8°C with nights around 15.6°C. Expect roughly 10.4 wet days totalling 70.8mm. Comfortable conditions for being outdoors all day.
September in Niagara Falls averages a daily high of 23.2°C with nights around 11.7°C. Expect roughly 10.3 wet days totalling 85.9mm. Comfortable conditions for being outdoors all day.
October in Niagara Falls averages a daily high of 16.1°C with nights around 5.9°C. Expect roughly 13.8 wet days totalling 84.2mm. Generally workable, with some weather to plan around.
November in Niagara Falls averages a daily high of 9.2°C with nights around 0.2°C. Expect roughly 12.8 wet days totalling 71.5mm. Demanding conditions — pack for it and plan indoor options.
December in Niagara Falls averages a daily high of 2.8°C with nights around -3.9°C. Expect roughly 16.1 wet days totalling 72.8mm. 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. Niagara Falls peaks at 79.
Based on 30 years of records, May–September scores highest for comfort in Niagara Falls, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 27.6°C.
July is the wettest, averaging 93.7mm of rain across roughly 11 wet days.
January is the coolest month, with average daily highs around 0.4°C.