| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 3.3° | -8° | 18.1mm | 4.9 | 22 |
| February | 5.9° | -6.3° | 26.7mm | 5.6 | 31 |
| March | 12.9° | 0° | 51.2mm | 7.8 | 59 |
| April | 19.1° | 5.5° | 90.4mm | 10.5 | 76 |
| May | 24.6° | 12.1° | 114.6mm | 12.4 | 75 |
| June | 29.6° | 17.7° | 126.1mm | 11.8 | 66 |
| July | 31.1° | 19.6° | 99.5mm | 9.4 | 65 |
| August | 30.2° | 18.1° | 103.2mm | 9.7 | 68 |
| September | 27.2° | 13° | 72.1mm | 8.3 | 83 |
| October | 20.2° | 6° | 78.6mm | 8.3 | 83 |
| November | 12.6° | -0.4° | 40.7mm | 5.8 | 61 |
| December | 5.5° | -6° | 30.9mm | 5.6 | 30 |
January in Saint Joseph averages a daily high of 3.3°C with nights around -8°C. Expect roughly 4.9 wet days totalling 18.1mm. A hard month to visit for comfort alone.
February in Saint Joseph averages a daily high of 5.9°C with nights around -6.3°C. Expect roughly 5.6 wet days totalling 26.7mm. A hard month to visit for comfort alone.
March in Saint Joseph averages a daily high of 12.9°C with nights around 0°C. Expect roughly 7.8 wet days totalling 51.2mm. Generally workable, with some weather to plan around.
April in Saint Joseph averages a daily high of 19.1°C with nights around 5.5°C. Expect roughly 10.5 wet days totalling 90.4mm. Comfortable conditions for being outdoors all day.
May in Saint Joseph averages a daily high of 24.6°C with nights around 12.1°C. Expect roughly 12.4 wet days totalling 114.6mm. Comfortable conditions for being outdoors all day.
June in Saint Joseph averages a daily high of 29.6°C with nights around 17.7°C. Expect roughly 11.8 wet days totalling 126.1mm. Generally workable, with some weather to plan around.
July in Saint Joseph averages a daily high of 31.1°C with nights around 19.6°C. Expect roughly 9.4 wet days totalling 99.5mm. Generally workable, with some weather to plan around.
August in Saint Joseph averages a daily high of 30.2°C with nights around 18.1°C. Expect roughly 9.7 wet days totalling 103.2mm. Generally workable, with some weather to plan around.
September in Saint Joseph averages a daily high of 27.2°C with nights around 13°C. Expect roughly 8.3 wet days totalling 72.1mm. Comfortable conditions for being outdoors all day.
October in Saint Joseph averages a daily high of 20.2°C with nights around 6°C. Expect roughly 8.3 wet days totalling 78.6mm. Comfortable conditions for being outdoors all day.
November in Saint Joseph averages a daily high of 12.6°C with nights around -0.4°C. Expect roughly 5.8 wet days totalling 40.7mm. Generally workable, with some weather to plan around.
December in Saint Joseph averages a daily high of 5.5°C with nights around -6°C. Expect roughly 5.6 wet days totalling 30.9mm. 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. Saint Joseph peaks at 83.
Based on 30 years of records, April–May scores highest for comfort in Saint Joseph, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 31.1°C.
June is the wettest, averaging 126.1mm of rain across roughly 11.8 wet days.
January is the coolest month, with average daily highs around 3.3°C.