Last updated: March 2, 2024
Under the Köppen–Geiger climate classification Florissant features a humid subtropical climate (Cfa). Temperatures typically range between 0 °C (32 °F) and 26 °C (80 °F) through the year, but rarely can drop to -22 °C (-7 °F) or can rise to as high as 38 °C (101 °F). The average annual precipitation amounts to about 1185 mm (46.7 inches) and receives 122 rainy days on the 1 mm (0.04 inches) threshold annually. Florissant enjoys an average of 2974 hours of sunshine throughout the year, and daylight varies from 9 hours 29 minutes to 14 hours 48 minutes per day.
The warmest months in Florissant are June, July and August, with daily mean temperatures ranging from 25 to 26 °C (76 - 80 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 0 to 4 °C (32 - 39 °F) throughout the day. On average each year, Florissant experiences 121 days above 25 °C (77.0 °F) and 75 days below 0 °C (32.0 °F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum | 19°C (67°F) |
24°C (76°F) |
27°C (81°F) |
30°C (87°F) |
34°C (94°F) |
36°C (98°F) |
38°C (101°F) |
35°C (96°F) |
35°C (95°F) |
34°C (93°F) |
25°C (78°F) |
22°C (71°F) |
| Mean maximum | 16°C (62°F) |
20°C (69°F) |
24°C (75°F) |
29°C (84°F) |
32°C (90°F) |
34°C (93°F) |
36°C (97°F) |
34°C (94°F) |
33°C (92°F) |
31°C (89°F) |
22°C (72°F) |
20°C (68°F) |
| Average high | 4°C (40°F) |
7°C (44°F) |
13°C (56°F) |
18°C (65°F) |
24°C (76°F) |
30°C (86°F) |
31°C (88°F) |
29°C (85°F) |
28°C (83°F) |
20°C (69°F) |
12°C (54°F) |
9°C (48°F) |
| Daily mean | 0°C (32°F) |
2°C (35°F) |
8°C (47°F) |
13°C (55°F) |
20°C (68°F) |
25°C (77°F) |
26°C (80°F) |
25°C (76°F) |
22°C (73°F) |
15°C (59°F) |
7°C (44°F) |
4°C (39°F) |
| Average low | -4°C (25°F) |
-3°C (27°F) |
3°C (39°F) |
8°C (46°F) |
15°C (59°F) |
20°C (68°F) |
22°C (72°F) |
20°C (68°F) |
17°C (63°F) |
10°C (50°F) |
2°C (36°F) |
-1°C (31°F) |
| Mean minimum | -16°C (3°F) |
-15°C (5°F) |
-8°C (17°F) |
-1°C (31°F) |
7°C (44°F) |
15°C (60°F) |
17°C (63°F) |
15°C (58°F) |
9°C (49°F) |
0°C (32°F) |
-7°C (19°F) |
-11°C (12°F) |
| Minimum | -22°C (-7°F) |
-19°C (-1°F) |
-17°C (2°F) |
-4°C (24°F) |
4°C (40°F) |
12°C (54°F) |
16°C (61°F) |
12°C (54°F) |
7°C (45°F) |
-4°C (26°F) |
-13°C (9°F) |
-18°C (-0°F) |
Compare temperature, precipitation, sunshine, UV index in Florissant, Missouri, United States with other places around the world.
Florissant usually has the most precipitation in March, May and August, with an average of 12 rainy days and 136 mm (5.3 inches) of precipitation per month. The driest months in Florissant are September, November and December. On average, 63 mm (2.5 inches) of precipitation falls during these months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average precipitation mm (inches) | 76 (3.0) | 80 (3.2) | 131 (5.2) | 129 (5.1) | 145 (5.7) | 101 (4.0) | 97 (3.8) | 130 (5.1) | 56 (2.2) | 105 (4.1) | 75 (2.9) | 59 (2.3) |
| Average precipitation days (≥ 1 mm) | 8 | 10 | 12 | 11 | 14 | 11 | 11 | 11 | 7 | 11 | 9 | 7 |
The sunniest months in Florissant are June, July and August, when the sun shines an average of 10 hours 55 minutes a day. Least sunny months in Florissant: January, February and December receive an average of 5 hours 26 minutes of sunshine daily.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean monthly sunshine hours | 124 | 173 | 205 | 241 | 287 | 328 | 347 | 329 | 290 | 239 | 211 | 196 |
| Mean daily daylight hours | 9h 47m | 10h 45m | 11h 58m | 13h 14m | 14h 17m | 14h 48m | 14h 31m | 13h 35m | 12h 23m | 11h 8m | 10h 2m | 9h 29m |
Florissant experiences the highest level of ultraviolet (UV) radiation in May, June and August, when the maximum UV index can reach values of 10 - 11, which corresponds to the Very High / Extreme category of sun exposure. January, November and December are in the Moderate exposure category. In these months, the maximum values of the UV index do not exceed 4. For more detailed information, check out our hourly Florissant UV Index data.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV Index (month maximum) | 3 | 5 | 6 | 9 | 10 | 11 | 10 | 10 | 9 | 6 | 4 | 3 |
Discover in-depth weather details for every month in Florissant. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about Florissant's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.
Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.