| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 4.9° | -4.2° | 68.5mm | 9.3 | 24 |
| February | 7.7° | -2.4° | 57.1mm | 8.8 | 36 |
| March | 14° | 3° | 93.9mm | 10.8 | 59 |
| April | 20.1° | 8.5° | 116.7mm | 11.1 | 78 |
| May | 25.2° | 14.7° | 127.4mm | 12.8 | 74 |
| June | 30.1° | 19.8° | 114.3mm | 9.8 | 68 |
| July | 32° | 22° | 112.9mm | 9 | 62 |
| August | 31.4° | 21.1° | 88mm | 8.6 | 65 |
| September | 27.6° | 16.5° | 72.6mm | 7.1 | 83 |
| October | 20.9° | 9.7° | 77.5mm | 8.3 | 83 |
| November | 13.4° | 3.2° | 81.9mm | 8.3 | 62 |
| December | 7.3° | -1.6° | 64.5mm | 9.4 | 35 |
January in Florissant averages a daily high of 4.9°C with nights around -4.2°C. Expect roughly 9.3 wet days totalling 68.5mm. A hard month to visit for comfort alone.
February in Florissant averages a daily high of 7.7°C with nights around -2.4°C. Expect roughly 8.8 wet days totalling 57.1mm. Demanding conditions — pack for it and plan indoor options.
March in Florissant averages a daily high of 14°C with nights around 3°C. Expect roughly 10.8 wet days totalling 93.9mm. Generally workable, with some weather to plan around.
April in Florissant averages a daily high of 20.1°C with nights around 8.5°C. Expect roughly 11.1 wet days totalling 116.7mm. Comfortable conditions for being outdoors all day.
May in Florissant averages a daily high of 25.2°C with nights around 14.7°C. Expect roughly 12.8 wet days totalling 127.4mm. Generally workable, with some weather to plan around.
June in Florissant averages a daily high of 30.1°C with nights around 19.8°C. Expect roughly 9.8 wet days totalling 114.3mm. Generally workable, with some weather to plan around.
July in Florissant averages a daily high of 32°C with nights around 22°C. Expect roughly 9 wet days totalling 112.9mm. Generally workable, with some weather to plan around.
August in Florissant averages a daily high of 31.4°C with nights around 21.1°C. Expect roughly 8.6 wet days totalling 88mm. Generally workable, with some weather to plan around.
September in Florissant averages a daily high of 27.6°C with nights around 16.5°C. Expect roughly 7.1 wet days totalling 72.6mm. Comfortable conditions for being outdoors all day.
October in Florissant averages a daily high of 20.9°C with nights around 9.7°C. Expect roughly 8.3 wet days totalling 77.5mm. Comfortable conditions for being outdoors all day.
November in Florissant averages a daily high of 13.4°C with nights around 3.2°C. Expect roughly 8.3 wet days totalling 81.9mm. Generally workable, with some weather to plan around.
December in Florissant averages a daily high of 7.3°C with nights around -1.6°C. Expect roughly 9.4 wet days totalling 64.5mm. 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. Florissant peaks at 83.
Based on 30 years of records, September–October scores highest for comfort in Florissant, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 32°C.
May is the wettest, averaging 127.4mm of rain across roughly 12.8 wet days.
January is the coolest month, with average daily highs around 4.9°C.