| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 0.7° | -5.9° | 68.7mm | 14.6 | 4 |
| February | 2.6° | -5.3° | 60.4mm | 10.9 | 12 |
| March | 8° | -1.3° | 68.6mm | 11.5 | 34 |
| April | 14.8° | 4.1° | 82.6mm | 12.7 | 58 |
| May | 21.6° | 10.2° | 91.6mm | 12.8 | 74 |
| June | 27.1° | 16.1° | 85.7mm | 10.7 | 78 |
| July | 29.2° | 18.5° | 89.8mm | 10.8 | 70 |
| August | 28.1° | 18° | 97.2mm | 9.6 | 76 |
| September | 24.3° | 14.1° | 91.5mm | 9.3 | 81 |
| October | 17.1° | 7.9° | 70.7mm | 11.2 | 68 |
| November | 9.5° | 1.8° | 67.6mm | 10.6 | 45 |
| December | 3.5° | -2.6° | 66.6mm | 13.5 | 13 |
January in Windsor averages a daily high of 0.7°C with nights around -5.9°C. Expect roughly 14.6 wet days totalling 68.7mm. A hard month to visit for comfort alone.
February in Windsor averages a daily high of 2.6°C with nights around -5.3°C. Expect roughly 10.9 wet days totalling 60.4mm. A hard month to visit for comfort alone.
March in Windsor averages a daily high of 8°C with nights around -1.3°C. Expect roughly 11.5 wet days totalling 68.6mm. A hard month to visit for comfort alone.
April in Windsor averages a daily high of 14.8°C with nights around 4.1°C. Expect roughly 12.7 wet days totalling 82.6mm. Generally workable, with some weather to plan around.
May in Windsor averages a daily high of 21.6°C with nights around 10.2°C. Expect roughly 12.8 wet days totalling 91.6mm. Generally workable, with some weather to plan around.
June in Windsor averages a daily high of 27.1°C with nights around 16.1°C. Expect roughly 10.7 wet days totalling 85.7mm. Comfortable conditions for being outdoors all day.
July in Windsor averages a daily high of 29.2°C with nights around 18.5°C. Expect roughly 10.8 wet days totalling 89.8mm. Generally workable, with some weather to plan around.
August in Windsor averages a daily high of 28.1°C with nights around 18°C. Expect roughly 9.6 wet days totalling 97.2mm. Comfortable conditions for being outdoors all day.
September in Windsor averages a daily high of 24.3°C with nights around 14.1°C. Expect roughly 9.3 wet days totalling 91.5mm. Comfortable conditions for being outdoors all day.
October in Windsor averages a daily high of 17.1°C with nights around 7.9°C. Expect roughly 11.2 wet days totalling 70.7mm. Generally workable, with some weather to plan around.
November in Windsor averages a daily high of 9.5°C with nights around 1.8°C. Expect roughly 10.6 wet days totalling 67.6mm. Demanding conditions — pack for it and plan indoor options.
December in Windsor averages a daily high of 3.5°C with nights around -2.6°C. Expect roughly 13.5 wet days totalling 66.6mm. 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. Windsor peaks at 81.
Based on 30 years of records, May–June scores highest for comfort in Windsor, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 29.2°C.
August is the wettest, averaging 97.2mm of rain across roughly 9.6 wet days.
January is the coolest month, with average daily highs around 0.7°C.