| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 7.8° | 2.5° | 63.7mm | 13.7 | 34 |
| February | 9.5° | 2.7° | 53.1mm | 12.2 | 42 |
| March | 13° | 4.3° | 51.2mm | 11.8 | 54 |
| April | 16.2° | 6.1° | 49.4mm | 10.4 | 67 |
| May | 19.8° | 9.6° | 61.1mm | 11.5 | 76 |
| June | 23.8° | 12.9° | 54.9mm | 10.1 | 80 |
| July | 26.1° | 14.6° | 47.4mm | 9 | 82 |
| August | 26° | 14.5° | 42.3mm | 8.7 | 83 |
| September | 22.5° | 11.7° | 49.8mm | 9.1 | 82 |
| October | 17.6° | 9.4° | 68.3mm | 13.3 | 66 |
| November | 11.6° | 5.4° | 67.8mm | 14.2 | 45 |
| December | 8.3° | 3° | 69.9mm | 14.4 | 34 |
January in Blois averages a daily high of 7.8°C with nights around 2.5°C. Expect roughly 13.7 wet days totalling 63.7mm. A hard month to visit for comfort alone.
February in Blois averages a daily high of 9.5°C with nights around 2.7°C. Expect roughly 12.2 wet days totalling 53.1mm. Demanding conditions — pack for it and plan indoor options.
March in Blois averages a daily high of 13°C with nights around 4.3°C. Expect roughly 11.8 wet days totalling 51.2mm. Demanding conditions — pack for it and plan indoor options.
April in Blois averages a daily high of 16.2°C with nights around 6.1°C. Expect roughly 10.4 wet days totalling 49.4mm. Generally workable, with some weather to plan around.
May in Blois averages a daily high of 19.8°C with nights around 9.6°C. Expect roughly 11.5 wet days totalling 61.1mm. Comfortable conditions for being outdoors all day.
June in Blois averages a daily high of 23.8°C with nights around 12.9°C. Expect roughly 10.1 wet days totalling 54.9mm. Comfortable conditions for being outdoors all day.
July in Blois averages a daily high of 26.1°C with nights around 14.6°C. Expect roughly 9 wet days totalling 47.4mm. Comfortable conditions for being outdoors all day.
August in Blois averages a daily high of 26°C with nights around 14.5°C. Expect roughly 8.7 wet days totalling 42.3mm. Comfortable conditions for being outdoors all day.
September in Blois averages a daily high of 22.5°C with nights around 11.7°C. Expect roughly 9.1 wet days totalling 49.8mm. Comfortable conditions for being outdoors all day.
October in Blois averages a daily high of 17.6°C with nights around 9.4°C. Expect roughly 13.3 wet days totalling 68.3mm. Generally workable, with some weather to plan around.
November in Blois averages a daily high of 11.6°C with nights around 5.4°C. Expect roughly 14.2 wet days totalling 67.8mm. Demanding conditions — pack for it and plan indoor options.
December in Blois averages a daily high of 8.3°C with nights around 3°C. Expect roughly 14.4 wet days totalling 69.9mm. 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. Blois peaks at 83.
Based on 30 years of records, May–September scores highest for comfort in Blois, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 26.1°C.
December is the wettest, averaging 69.9mm of rain across roughly 14.4 wet days.
January is the coolest month, with average daily highs around 7.8°C.