| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 6.9° | 1.1° | 56.2mm | 11.9 | 33 |
| February | 9.1° | 1.9° | 47.4mm | 10.1 | 45 |
| March | 13.5° | 4.3° | 56.3mm | 10.9 | 57 |
| April | 17.2° | 7.3° | 70.1mm | 10.2 | 71 |
| May | 21.2° | 11.4° | 83.8mm | 11.8 | 76 |
| June | 25.5° | 15.2° | 71.2mm | 9.7 | 81 |
| July | 27.7° | 16.8° | 64mm | 8.6 | 80 |
| August | 27.4° | 16.6° | 67.2mm | 8.3 | 82 |
| September | 22.9° | 13° | 74.1mm | 8.5 | 83 |
| October | 18.2° | 10° | 99.4mm | 11 | 72 |
| November | 11.2° | 4.8° | 88.7mm | 12.4 | 47 |
| December | 7.5° | 1.8° | 65.4mm | 12.6 | 35 |
January in Lyon 03 averages a daily high of 6.9°C with nights around 1.1°C. Expect roughly 11.9 wet days totalling 56.2mm. A hard month to visit for comfort alone.
February in Lyon 03 averages a daily high of 9.1°C with nights around 1.9°C. Expect roughly 10.1 wet days totalling 47.4mm. Demanding conditions — pack for it and plan indoor options.
March in Lyon 03 averages a daily high of 13.5°C with nights around 4.3°C. Expect roughly 10.9 wet days totalling 56.3mm. Generally workable, with some weather to plan around.
April in Lyon 03 averages a daily high of 17.2°C with nights around 7.3°C. Expect roughly 10.2 wet days totalling 70.1mm. Generally workable, with some weather to plan around.
May in Lyon 03 averages a daily high of 21.2°C with nights around 11.4°C. Expect roughly 11.8 wet days totalling 83.8mm. Comfortable conditions for being outdoors all day.
June in Lyon 03 averages a daily high of 25.5°C with nights around 15.2°C. Expect roughly 9.7 wet days totalling 71.2mm. Comfortable conditions for being outdoors all day.
July in Lyon 03 averages a daily high of 27.7°C with nights around 16.8°C. Expect roughly 8.6 wet days totalling 64mm. Comfortable conditions for being outdoors all day.
August in Lyon 03 averages a daily high of 27.4°C with nights around 16.6°C. Expect roughly 8.3 wet days totalling 67.2mm. Comfortable conditions for being outdoors all day.
September in Lyon 03 averages a daily high of 22.9°C with nights around 13°C. Expect roughly 8.5 wet days totalling 74.1mm. Comfortable conditions for being outdoors all day.
October in Lyon 03 averages a daily high of 18.2°C with nights around 10°C. Expect roughly 11 wet days totalling 99.4mm. Generally workable, with some weather to plan around.
November in Lyon 03 averages a daily high of 11.2°C with nights around 4.8°C. Expect roughly 12.4 wet days totalling 88.7mm. Demanding conditions — pack for it and plan indoor options.
December in Lyon 03 averages a daily high of 7.5°C with nights around 1.8°C. Expect roughly 12.6 wet days totalling 65.4mm. 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. Lyon 03 peaks at 83.
Based on 30 years of records, May–September scores highest for comfort in Lyon 03, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 27.7°C.
October is the wettest, averaging 99.4mm of rain across roughly 11 wet days.
January is the coolest month, with average daily highs around 6.9°C.