| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | -2.8° | -10.8° | 89.8mm | 18.2 | 0 |
| February | -1.6° | -10.6° | 78.6mm | 15.6 | 0 |
| March | 3.5° | -5.9° | 59.9mm | 13.3 | 9 |
| April | 10.9° | 0.5° | 77.1mm | 12.4 | 44 |
| May | 18.7° | 6.7° | 74mm | 10.8 | 74 |
| June | 23.7° | 12.3° | 94.3mm | 10.7 | 79 |
| July | 26.1° | 14.9° | 82mm | 10.1 | 80 |
| August | 25.3° | 14.4° | 86.7mm | 10.6 | 79 |
| September | 21.5° | 10.7° | 77.9mm | 10.5 | 79 |
| October | 13.8° | 5.3° | 86.2mm | 15.3 | 50 |
| November | 6.3° | -0.8° | 85.6mm | 15.6 | 22 |
| December | 0.4° | -5.9° | 93.2mm | 17.7 | 3 |
January in Barrie averages a daily high of -2.8°C with nights around -10.8°C. Expect roughly 18.2 wet days totalling 89.8mm. A hard month to visit for comfort alone.
February in Barrie averages a daily high of -1.6°C with nights around -10.6°C. Expect roughly 15.6 wet days totalling 78.6mm. A hard month to visit for comfort alone.
March in Barrie averages a daily high of 3.5°C with nights around -5.9°C. Expect roughly 13.3 wet days totalling 59.9mm. A hard month to visit for comfort alone.
April in Barrie averages a daily high of 10.9°C with nights around 0.5°C. Expect roughly 12.4 wet days totalling 77.1mm. Demanding conditions — pack for it and plan indoor options.
May in Barrie averages a daily high of 18.7°C with nights around 6.7°C. Expect roughly 10.8 wet days totalling 74mm. Generally workable, with some weather to plan around.
June in Barrie averages a daily high of 23.7°C with nights around 12.3°C. Expect roughly 10.7 wet days totalling 94.3mm. Comfortable conditions for being outdoors all day.
July in Barrie averages a daily high of 26.1°C with nights around 14.9°C. Expect roughly 10.1 wet days totalling 82mm. Comfortable conditions for being outdoors all day.
August in Barrie averages a daily high of 25.3°C with nights around 14.4°C. Expect roughly 10.6 wet days totalling 86.7mm. Comfortable conditions for being outdoors all day.
September in Barrie averages a daily high of 21.5°C with nights around 10.7°C. Expect roughly 10.5 wet days totalling 77.9mm. Comfortable conditions for being outdoors all day.
October in Barrie averages a daily high of 13.8°C with nights around 5.3°C. Expect roughly 15.3 wet days totalling 86.2mm. Demanding conditions — pack for it and plan indoor options.
November in Barrie averages a daily high of 6.3°C with nights around -0.8°C. Expect roughly 15.6 wet days totalling 85.6mm. A hard month to visit for comfort alone.
December in Barrie averages a daily high of 0.4°C with nights around -5.9°C. Expect roughly 17.7 wet days totalling 93.2mm. 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. Barrie peaks at 80.
Based on 30 years of records, May–September scores highest for comfort in Barrie, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 26.1°C.
June is the wettest, averaging 94.3mm of rain across roughly 10.7 wet days.
January is the coolest month, with average daily highs around -2.8°C.