| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | -3° | -11.5° | 34.1mm | 9 | 12 |
| February | -1° | -10.5° | 29.5mm | 8.2 | 14 |
| March | 5.4° | -4.5° | 53.7mm | 8.8 | 26 |
| April | 12.6° | 2.3° | 78.8mm | 11.8 | 53 |
| May | 19.6° | 9.1° | 106.1mm | 12.5 | 74 |
| June | 25.4° | 15.1° | 124.9mm | 11.7 | 77 |
| July | 27.9° | 17.3° | 93.2mm | 9.9 | 77 |
| August | 26.7° | 16.5° | 99.5mm | 10 | 80 |
| September | 23° | 11.9° | 76mm | 9.2 | 82 |
| October | 15.3° | 5.3° | 73.8mm | 10.7 | 64 |
| November | 7.2° | -1.4° | 48.6mm | 8.7 | 37 |
| December | 0.1° | -7.7° | 41mm | 9.6 | 11 |
January in Oshkosh averages a daily high of -3°C with nights around -11.5°C. Expect roughly 9 wet days totalling 34.1mm. A hard month to visit for comfort alone.
February in Oshkosh averages a daily high of -1°C with nights around -10.5°C. Expect roughly 8.2 wet days totalling 29.5mm. A hard month to visit for comfort alone.
March in Oshkosh averages a daily high of 5.4°C with nights around -4.5°C. Expect roughly 8.8 wet days totalling 53.7mm. A hard month to visit for comfort alone.
April in Oshkosh averages a daily high of 12.6°C with nights around 2.3°C. Expect roughly 11.8 wet days totalling 78.8mm. Demanding conditions — pack for it and plan indoor options.
May in Oshkosh averages a daily high of 19.6°C with nights around 9.1°C. Expect roughly 12.5 wet days totalling 106.1mm. Generally workable, with some weather to plan around.
June in Oshkosh averages a daily high of 25.4°C with nights around 15.1°C. Expect roughly 11.7 wet days totalling 124.9mm. Comfortable conditions for being outdoors all day.
July in Oshkosh averages a daily high of 27.9°C with nights around 17.3°C. Expect roughly 9.9 wet days totalling 93.2mm. Comfortable conditions for being outdoors all day.
August in Oshkosh averages a daily high of 26.7°C with nights around 16.5°C. Expect roughly 10 wet days totalling 99.5mm. Comfortable conditions for being outdoors all day.
September in Oshkosh averages a daily high of 23°C with nights around 11.9°C. Expect roughly 9.2 wet days totalling 76mm. Comfortable conditions for being outdoors all day.
October in Oshkosh averages a daily high of 15.3°C with nights around 5.3°C. Expect roughly 10.7 wet days totalling 73.8mm. Generally workable, with some weather to plan around.
November in Oshkosh averages a daily high of 7.2°C with nights around -1.4°C. Expect roughly 8.7 wet days totalling 48.6mm. Demanding conditions — pack for it and plan indoor options.
December in Oshkosh averages a daily high of 0.1°C with nights around -7.7°C. Expect roughly 9.6 wet days totalling 41mm. 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. Oshkosh peaks at 82.
Based on 30 years of records, May–September scores highest for comfort in Oshkosh, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 27.9°C.
June is the wettest, averaging 124.9mm of rain across roughly 11.7 wet days.
January is the coolest month, with average daily highs around -3°C.