| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | -5.1° | -14.7° | 65.7mm | 13.1 | 4 |
| February | -2.7° | -13.8° | 56.1mm | 10.4 | 9 |
| March | 3° | -7.6° | 58.6mm | 9.3 | 13 |
| April | 11.2° | 0.2° | 83.7mm | 11 | 47 |
| May | 19° | 6.5° | 79.8mm | 11.6 | 74 |
| June | 24.6° | 12.7° | 105.2mm | 11.9 | 76 |
| July | 26.8° | 15.1° | 94.6mm | 10.2 | 80 |
| August | 25.4° | 13.9° | 86.2mm | 9.2 | 82 |
| September | 21° | 9.6° | 92.6mm | 10.8 | 78 |
| October | 13.2° | 3.4° | 89.6mm | 13.1 | 52 |
| November | 5.2° | -2.7° | 80.6mm | 12.1 | 21 |
| December | -1.7° | -9.6° | 90mm | 15.7 | 0 |
January in Gatineau averages a daily high of -5.1°C with nights around -14.7°C. Expect roughly 13.1 wet days totalling 65.7mm. A hard month to visit for comfort alone.
February in Gatineau averages a daily high of -2.7°C with nights around -13.8°C. Expect roughly 10.4 wet days totalling 56.1mm. A hard month to visit for comfort alone.
March in Gatineau averages a daily high of 3°C with nights around -7.6°C. Expect roughly 9.3 wet days totalling 58.6mm. A hard month to visit for comfort alone.
April in Gatineau averages a daily high of 11.2°C with nights around 0.2°C. Expect roughly 11 wet days totalling 83.7mm. Demanding conditions — pack for it and plan indoor options.
May in Gatineau averages a daily high of 19°C with nights around 6.5°C. Expect roughly 11.6 wet days totalling 79.8mm. Generally workable, with some weather to plan around.
June in Gatineau averages a daily high of 24.6°C with nights around 12.7°C. Expect roughly 11.9 wet days totalling 105.2mm. Comfortable conditions for being outdoors all day.
July in Gatineau averages a daily high of 26.8°C with nights around 15.1°C. Expect roughly 10.2 wet days totalling 94.6mm. Comfortable conditions for being outdoors all day.
August in Gatineau averages a daily high of 25.4°C with nights around 13.9°C. Expect roughly 9.2 wet days totalling 86.2mm. Comfortable conditions for being outdoors all day.
September in Gatineau averages a daily high of 21°C with nights around 9.6°C. Expect roughly 10.8 wet days totalling 92.6mm. Comfortable conditions for being outdoors all day.
October in Gatineau averages a daily high of 13.2°C with nights around 3.4°C. Expect roughly 13.1 wet days totalling 89.6mm. Demanding conditions — pack for it and plan indoor options.
November in Gatineau averages a daily high of 5.2°C with nights around -2.7°C. Expect roughly 12.1 wet days totalling 80.6mm. A hard month to visit for comfort alone.
December in Gatineau averages a daily high of -1.7°C with nights around -9.6°C. Expect roughly 15.7 wet days totalling 90mm. 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. Gatineau peaks at 82.
Based on 30 years of records, May–September scores highest for comfort in Gatineau, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 26.8°C.
June is the wettest, averaging 105.2mm of rain across roughly 11.9 wet days.
January is the coolest month, with average daily highs around -5.1°C.