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United States weather

Weather in Saint Louis County, Missouri for December 2026

Your guide to Saint Louis County weather in December - trends and predictions

    Snow Forecast ❄️

  • Snowfall in Saint Louis County during December is quite rare, with fewer than 2 snowy days on average.

    • Rain 🌧️

  • With an average of 4 rainy days, Saint Louis County experiences minimal rainfall in December.

    • More

  • Is December a good time to visit Saint Louis County? check out the best time to travel to Saint Louis County page.

  • ✨ Is December a good time to visit Saint Louis County? – Ask the AI Weatherman

Average dry days
26
Dry days
Average rainy days
4
Rainy days
Average snowy days
1
Snow days
Average temperatures
6°/1°
Temperatures
Average wind speed
17 km/h
Avg max wind
Average humidity
73 %
Avg humidity

Saint Louis County Weather December

Move between months or click on a day
November
January
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Light snow
0°
2
Moderate snow
1°
3
Partly cloudy
3°
4
Overcast
5°
5
Cloudy
3°
6
Cloudy
2°
7
Sunny
6°
8
Overcast
6°
9
Mist
10°
10
Overcast
8°
11
Patchy rain possible
4°
12
Partly cloudy
6°
13
Overcast
2°
14
Heavy rain
-1°
15
Mist
8°
16
Moderate rain
10°
17
Overcast
11°
18
Mist
10°
19
Partly cloudy
6°
20
Partly cloudy
7°
21
Partly cloudy
4°
22
Sunny
6°
23
Overcast
8°
24
Heavy rain at times
10°
25
Fog
11°
26
Fog
13°
27
Heavy rain
13°
28
Light rain
15°
29
Fog
6°
30
Patchy rain possible
5°
31
Overcast
6°

Temperatures trend during December in Saint Louis County

See the weather trend as well as the moving average line

December weather in Saint Louis County day by day

Click on a date for more information
November January
Date Weather Temperatures Rain Snow More
Dec. 1 Light snow
Light snow
 0° /-4° 2.2 mm 1.6 cm
Dec. 2 Moderate snow
Moderate snow
 1° /-3° 10.6 mm 5.9 cm
Dec. 3 Partly cloudy
Partly cloudy
 3° /-4° 0 mm 0 cm
Dec. 4 Overcast
Overcast
 5° /-4° 0 mm 0 cm
Dec. 5 Cloudy
Cloudy
 3° /-7° 0 mm 0 cm
Dec. 6 Cloudy
Cloudy
 2° /-2° 0 mm 0 cm
Dec. 7 Sunny
Sunny
 6° /-1° 0 mm 0 cm
Dec. 8 Overcast
Overcast
 6° /1° 0 mm 0 cm
Dec. 9 Mist
Mist
 10° /3° 0 mm 0 cm
Dec. 10 Overcast
Overcast
 8° /0° 0 mm 0 cm
Dec. 11 Patchy rain possible
Patchy rain possible
 4° /-1° 0 mm 0 cm
Dec. 12 Partly cloudy
Partly cloudy
 6° /-1° 0 mm 0 cm
Dec. 13 Overcast
Overcast
 2° /-5° 0 mm 0 cm
Dec. 14 Heavy rain
Heavy rain
 -1° /-6° 34.8 mm 0 cm
Dec. 15 Mist
Mist
 8° /-2° 0 mm 0 cm
Dec. 16 Moderate rain
Moderate rain
 10° /4° 14.7 mm 0 cm
Dec. 17 Overcast
Overcast
 11° /3° 0 mm 0 cm
Dec. 18 Mist
Mist
 10° /3° 0 mm 0 cm
Dec. 19 Partly cloudy
Partly cloudy
 6° /-2° 0 mm 0 cm
Dec. 20 Partly cloudy
Partly cloudy
 7° /-1° 0 mm 0 cm
Dec. 21 Partly cloudy
Partly cloudy
 4° /-1° 0 mm 0 cm
Dec. 22 Sunny
Sunny
 6° /-1° 0 mm 0 cm
Dec. 23 Overcast
Overcast
 8° /5° 0 mm 0 cm
Dec. 24 Heavy rain at times
Heavy rain at times
 10° /5° 16.7 mm 0 cm
Dec. 25 Fog
Fog
 11° /7° 0.4 mm 0 cm
Dec. 26 Fog
Fog
 13° /8° 0 mm 0 cm
Dec. 27 Heavy rain
Heavy rain
 13° /8° 17.8 mm 0 cm
Dec. 28 Light rain
Light rain
 15° /10° 4.2 mm 0 cm
Dec. 29 Fog
Fog
 6° /2° 0 mm 0 cm
Dec. 30 Patchy rain possible
Patchy rain possible
 5° /1° 1.2 mm 0 cm
Dec. 31 Overcast
Overcast
 6° /-1° 0 mm 0 cm
Next
Important Notice
Our weather forecast for Saint Louis County in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Saint Louis County forecast closer to your planned date for the most up-to-date weather information.
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Saint Louis County in December - FAQ

What are the expected maximum and minimum temperatures in Saint Louis County during December?
Prepare for cooler days with highs just around 6° and colder nights, dipping below 1°.

How much rainfall should be expected in Saint Louis County during December?
Significant rainfall exceeding 102.7 mm is expected in Saint Louis County during December, occurring over more than 4 days. Preparing for wet conditions is recommended in your planning.

Will it snow in Saint Louis County in December 2026?
Saint Louis County typically sees 7.6 cm of snowfall during December.

What are the typical wind conditions in Saint Louis County during December?
The average wind speed in Saint Louis County during December is 17 km/h, suggesting breezy to windy conditions, depending on your activities.

Saint Louis County snow forecast December 2026

Track daily snowfall levels and discover Saint Louis County’s snowy potential this December ❄️
On average, Saint Louis County sees 1 snowy days during December, with approximately 7.6 cm of total snowfall.

December rainfall patterns in Saint Louis County

Explore the daily rainfall trends and prepare for Saint Louis Countys December weather 💧
Typically, Saint Louis County has 4 rainy days in December with a total of 102.7 mm of rainfall.
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