| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 6.1° | -3° | 94.4mm | 11.8 | 24 |
| February | 9.3° | -1.2° | 94.2mm | 10.6 | 40 |
| March | 14.8° | 3.3° | 121mm | 12.2 | 59 |
| April | 20.5° | 8.5° | 125.2mm | 11.7 | 77 |
| May | 25.7° | 14.5° | 123.9mm | 12.3 | 75 |
| June | 30° | 19.1° | 111.2mm | 10.3 | 67 |
| July | 31.5° | 21.1° | 100.7mm | 10.1 | 62 |
| August | 30.8° | 20.4° | 85.2mm | 8.2 | 68 |
| September | 28.1° | 16.8° | 103.3mm | 7.6 | 80 |
| October | 21.8° | 10.1° | 82.6mm | 8.3 | 83 |
| November | 14.1° | 3.2° | 94.9mm | 9.8 | 62 |
| December | 10° | 0.8° | 114.6mm | 12 | 42 |
January in Louisville averages a daily high of 6.1°C with nights around -3°C. Expect roughly 11.8 wet days totalling 94.4mm. A hard month to visit for comfort alone.
February in Louisville averages a daily high of 9.3°C with nights around -1.2°C. Expect roughly 10.6 wet days totalling 94.2mm. Demanding conditions — pack for it and plan indoor options.
March in Louisville averages a daily high of 14.8°C with nights around 3.3°C. Expect roughly 12.2 wet days totalling 121mm. Generally workable, with some weather to plan around.
April in Louisville averages a daily high of 20.5°C with nights around 8.5°C. Expect roughly 11.7 wet days totalling 125.2mm. Comfortable conditions for being outdoors all day.
May in Louisville averages a daily high of 25.7°C with nights around 14.5°C. Expect roughly 12.3 wet days totalling 123.9mm. Comfortable conditions for being outdoors all day.
June in Louisville averages a daily high of 30°C with nights around 19.1°C. Expect roughly 10.3 wet days totalling 111.2mm. Generally workable, with some weather to plan around.
July in Louisville averages a daily high of 31.5°C with nights around 21.1°C. Expect roughly 10.1 wet days totalling 100.7mm. Generally workable, with some weather to plan around.
August in Louisville averages a daily high of 30.8°C with nights around 20.4°C. Expect roughly 8.2 wet days totalling 85.2mm. Generally workable, with some weather to plan around.
September in Louisville averages a daily high of 28.1°C with nights around 16.8°C. Expect roughly 7.6 wet days totalling 103.3mm. Comfortable conditions for being outdoors all day.
October in Louisville averages a daily high of 21.8°C with nights around 10.1°C. Expect roughly 8.3 wet days totalling 82.6mm. Comfortable conditions for being outdoors all day.
November in Louisville averages a daily high of 14.1°C with nights around 3.2°C. Expect roughly 9.8 wet days totalling 94.9mm. Generally workable, with some weather to plan around.
December in Louisville averages a daily high of 10°C with nights around 0.8°C. Expect roughly 12 wet days totalling 114.6mm. Demanding conditions — pack for it and plan indoor options.
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. Louisville peaks at 83.
Based on 30 years of records, April–May scores highest for comfort in Louisville, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 31.5°C.
April is the wettest, averaging 125.2mm of rain across roughly 11.7 wet days.
January is the coolest month, with average daily highs around 6.1°C.