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Florissant, MO Weather Tomorrow

Florissant weather tomorrow and 5 day forecast with this week's outlook featuring precipitation probability, daily and nightly weather conditions, high and low temperature trends, sunrise and sunset information, sky cover, wind speed, wind direction, and wind chill for the Florissant area and around St. Louis county, Missouri.
Updated: Mon Sep 28th 2026 6:00 PM CDT
Florissant, MO Weather – 9-28 – Sunny
80° / 59°
Sunny
In Florissant, it will be sunny with highs near 80°F and lows around 59°F. There's a very small chance of rainfall, only about 2%. Winds will be light at 6mph and gusts of 10.3mph at 11 PM. Humidity levels should be comfortable, sitting around 39% on average, the maximum being 31% at 11 PM and 26% being its lowest at 7 PM. Barometric pressure is its highest of 30inHg at 8 PM, a lowest point of 29.99inHg at 7 PM with an avg 29.99inHg.
Florissant, MO Weather – 9-29 – Sunny
85° / 63°

Weather Tomorrow

Sunny
Florissant may see a sunny day, with daytime highs of 85°F and overnight lows near 63°F. There's a very small chance of rainfall, only about 3%. Winds will be light at 9mph and gusts of 14.3mph at 9 PM. Humidity levels should be comfortable, sitting around 37% on average, the maximum being 58% at 7 AM and 23% being its lowest at 2 PM. Barometric pressure is its highest of 30.01inHg at 8 AM, a lowest point of 29.85inHg at 6 PM with an avg 29.94inHg.
Florissant, MO Weather – 9-30 – Overcast
91° / 72°
Overcast
It will be overcast in Florissant, with a high of 91°F and a low of 72°F. There's a very small chance of rainfall, only about 9%. Wind will be moderate, blowing around 13mph on average and gusts of 30.2mph at 9 AM. Humidity levels should be comfortable, sitting around 35% on average, the maximum being 46% at 11 PM and 30% being its lowest at 4 PM. Barometric pressure is its highest of 29.88inHg at 9 AM, a lowest point of 29.76inHg at 6 PM with an avg 29.82inHg.
Florissant, MO Weather – 10-1 – Overcast
88° / 69°
Overcast
Daytime highs will reach 88°F with lows dropping to 69°F in Florissant, where skies will be overcast. Rainfall predicted to have a 74% chance with an estimated 0.27in. Wind will be moderate, blowing around 15mph on average and gusts of 31.9mph at 4 AM. Humidity levels should be comfortable, sitting around 58% on average, the maximum being 92% at 11 PM and 39% being its lowest at 4 PM. Barometric pressure is its highest of 29.92inHg at 11 PM, a lowest point of 29.77inHg at 4 PM with an avg 29.83inHg.
Florissant, MO Weather – 10-2 – Scattered Showers
68° / 57°
Scattered Showers
On and off showers are set to occur in Florissant, with a high of 68°F and a low of 57°F. The chance of rain is 83% with an estimated 0.17in. Winds will be light at 10mph and gusts of 20.1mph at 1 PM. High humidity with average of 82% is anticipated, the maximum being 95% at 5 AM and 54% being its lowest at 1 PM. Barometric pressure is its highest of 30.23inHg at 1 PM, a lowest point of 29.92inHg at 12 AM with an avg 30.1inHg.
Florissant, MO Weather – 10-3 – Overcast
58° / 54°
Overcast
Daytime highs will reach 58°F with lows dropping to 54°F in Florissant, where skies will be overcast. The chance of rain is 85% with an estimated 0.22in. Winds will be light at 8mph and gusts of 16.1mph at 12 AM. High humidity with average of 82% is anticipated, the maximum being 97% at 11 PM and 68% being its lowest at 7 AM. Barometric pressure is its highest of 30.2inHg at 12 AM, a lowest point of 30inHg at 11 PM with an avg 30.11inHg.

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