Florissant, Missouri 

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Climate in Florissant, Missouri

Florissant, MO has a humid continental climate, characterized by hot summers and cold winters. The average temperature in the summer months ranges from 78°F to 91°F with occasionally higher temperatures and high humidity. In the winter months, temperatures drop to around 34°F and can dip below freezing during cold spells. Rainfall is distributed fairly evenly throughout the year with each month receiving at least 2 inches of precipitation on average.

Florissant, Missouri gets 42 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Florissant averages 13 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 202 sunny days per year in Florissant. The US average is 205 sunny days.

Florissant gets some kind of precipitation, on average, 104 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.

Weather Highlights

Summer High: the July high is around 89 degrees
Winter Low: the January low is 23
Rain: averages 42 inches of rain a year
Snow: averages 13 inches of snow a year


The annual BestPlaces Comfort Index for Florissant is 7.2 (10=best), which means it is more comfortable than most places in Missouri.

7.4 / 5.6

Summer   /   Winter
September, May and October are the most pleasant months in Florissant, while January and December are the least comfortable months.

Climate Averages
  Florissant, MissouriUnited States
  41.8 in.38.1 in.
  13.2 in.27.8 in.
  104.0 days106.2 days
  202 days205 days
  581 ft.2443 ft.


Many people confuse weather and climate but they are different. Weather is the conditions of the atmosphere over a short period of time, and climate is how the atmosphere is over long periods of time.

Weather is how the atmosphere is behaving and its effects upon life and human activities. Weather can change from minute-to-minute. Most people think of weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure.

Climate is the description of the long-term pattern of weather in a place. Climate can mean the average weather for a particular region and time period taken over 30 years. Climate is the average of weather over time.

July is the hottest month for Florissant with an average high temperature of 88.6°, which ranks it as warmer than most places in Missouri. In Florissant, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Florissant are May, September and June.

In Florissant, there are 36.1 days annually when the high temperature is over 90°, which is hotter than most places in Missouri.

January has the coldest nighttime temperatures for Florissant with an average of 22.7°. This is warmer than most places in Missouri.

In Florissant, there are 90.0 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Missouri.

In Florissant, there are 1.8 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Missouri.

The humidity can be uncomfortably heavy or close in Florissant during the summer months. July is the most humid month, though humidity is low for most of the year. July, August and June are the three most humid months in Florissant.

May is the wettest month in Florissant with 4.8 inches of rain, and the driest month is February with 2.3 inches. The wettest season is Summer with 29% of yearly precipitation and 18% occurs in Spring, which is the driest season. The annual rainfall of 41.8 inches in Florissant means that it is drier than most places in Missouri.

May is the rainiest month in Florissant with 11.1 days of rain, and September is the driest month with only 7.0 rainy days. There are 104.0 rainy days annually in Florissant, which is rainier than most places in Missouri. The rainiest season is Summer when it rains 30% of the time and the driest is Spring with only a 23% chance of a rainy day.

An annual snowfall of 13.2 inches in Florissant means that it is about average compared to other places in Missouri. January is the snowiest month in Florissant with 4.5 inches of snow, and 4 months of the year have significant snowfall.

  • Annual Rainfall (US Avg: 36.5")
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    Reviews for Florissant    5 Reviews
    Okay Area to live - 10/5/2011
    Overall it's a good area to live in. We live on a mostly quiet street, it's a cul de sac. We've had our lawnmower stolen out our backyard, that's about all. Our... Read More

    Start Your Review of Florissant

    What's Florissant Like These Days - 2/2011 - 2/16/2011
    I'd like to get some updated information on Florissant, MO. I'm thinking about moving there this spring. I am a former Chicagoan, lived in Phoenix, AZ for many years. ... Read More

    Florissant the beautiful city - 5/7/2006
    Its not filled with Mullets and trans ams as the person above indicates. But yes it is blue collar, not low income, but blue collar hard working middle class. If you are... Read More

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