St. Charles weather in December: St. Charles, Missouri: normal highs, lows, rain and records for December
St. Charles in December has a normal high of 44°F and a normal low of 27°F, a daily mean of 36°F, falling from 49°F on the 1st to 41°F by the 31st. Measurable precipitation falls on 8 days in a normal December, 2.35 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 7°C and low of −3°C, 60 mm of precipitation in December.
- NOAA stationSt Charles County Airport
- Station IDUSW00053904
- Location38.93°N 90.43°W
- Elevation436 ft (133 m)
- Population72,458
- Jan 40° 22°
- Feb 45° 26°
- Mar 56° 34°
- Apr 68° 45°
- May 77° 56°
- Jun 86° 65°
- Jul 89° 68°
- Aug 88° 66°
- Sep 81° 57°
- Oct 69° 46°
- Nov 55° 35°
- Dec 44° 27°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is St. Charles in December?
The normal high is 44°F and the normal low 27°F, for a daily mean of 35.5°F. December is 9.5°F cooler than November and 4.7°F warmer than January. December is the 10th warmest month of the year in St. Charles and the 11th wettest. Across the month the normal high falls 8°F, from 49°F on December 1 to 41°F on December 31. From one year to the next December's mean temperature typically moves about 4.3°F either way (NOAA's standard deviation), so roughly two Decembers in three average between 31°F and 40°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 27%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 49°F | 30°F | 27% | 16% |
| December 8 | 46°F | 29°F | 27% | 15% |
| December 15 | 44°F | 27°F | 26% | 15% |
| December 22 | 42°F | 26°F | 25% | 14% |
| December 31 | 41°F | 24°F | 24% | 13% |
Every day of December: normal high, low and chance of precipitation (warmest afternoon December 1, coldest night December 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| December 1 | 49°F | 30°F | 27% | 16% | 9 h 40 min |
| December 2 | 48°F | 30°F | 27% | 16% | 9 h 40 min |
| December 3 | 48°F | 30°F | 27% | 15% | 9 h 40 min |
| December 4 | 48°F | 30°F | 27% | 15% | 9 h 40 min |
| December 5 | 47°F | 29°F | 27% | 15% | 9 h 40 min |
| December 6 | 47°F | 29°F | 27% | 15% | 9 h 30 min |
| December 7 | 47°F | 29°F | 27% | 15% | 9 h 30 min |
| December 8 | 46°F | 29°F | 27% | 15% | 9 h 30 min |
| December 9 | 46°F | 29°F | 27% | 15% | 9 h 30 min |
| December 10 | 46°F | 28°F | 27% | 15% | 9 h 30 min |
| December 11 | 45°F | 28°F | 27% | 15% | 9 h 30 min |
| December 12 | 45°F | 28°F | 27% | 15% | 9 h 30 min |
| December 13 | 45°F | 28°F | 26% | 15% | 9 h 30 min |
| December 14 | 44°F | 28°F | 26% | 15% | 9 h 30 min |
| December 15 | 44°F | 27°F | 26% | 15% | 9 h 30 min |
| December 16 | 44°F | 27°F | 26% | 15% | 9 h 30 min |
| December 17 | 44°F | 27°F | 26% | 15% | 9 h 30 min |
| December 18 | 43°F | 27°F | 26% | 15% | 9 h 30 min |
| December 19 | 43°F | 26°F | 26% | 15% | 9 h 30 min |
| December 20 | 43°F | 26°F | 26% | 15% | 9 h 30 min |
| December 21 | 43°F | 26°F | 25% | 15% | 9 h 30 min |
| December 22 | 42°F | 26°F | 25% | 14% | 9 h 30 min |
| December 23 | 42°F | 26°F | 25% | 14% | 9 h 30 min |
| December 24 | 42°F | 25°F | 25% | 14% | 9 h 30 min |
| December 25 | 42°F | 25°F | 25% | 14% | 9 h 30 min |
| December 26 | 41°F | 25°F | 25% | 14% | 9 h 30 min |
| December 27 | 41°F | 25°F | 25% | 14% | 9 h 30 min |
| December 28 | 41°F | 24°F | 24% | 14% | 9 h 30 min |
| December 29 | 41°F | 24°F | 24% | 14% | 9 h 30 min |
| December 30 | 41°F | 24°F | 24% | 14% | 9 h 30 min |
| December 31 | 41°F | 24°F | 24% | 13% | 9 h 30 min |
- Normal high
- 44°FDecember average
- Normal low
- 27°FDecember average
- Precipitation
- 2.35 inmonth total
- Days with precipitation
- 80.01 inch or more
- Nights at 32°F or colder
- 24
- Daylight
- 9 h 40 min to 9 h 30 minDecember 1 to December 31
- Sunshine
- 66%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00053904; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in St. Charles in December?
On a given December day the chance of 0.01 inch or more is 26% on average, highest around December 1 (27%). In all, 2.35 in falls on 8 days of a normal December, 1 of them with an inch or more.
In a normal December in St. Charles, 24 nights fall to freezing and 5 days stay below freezing all day.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00053904.
What are the records for December in St. Charles?
The December mean against the 1991-2020 normal of 35.5°F: 2021 45.2°F (+9.7), 2022 36.3°F (+0.8), 2023 41.8°F (+6.3), 2024 38.1°F (+2.6), 2025 34.0°F (−1.5). 4 of 5 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 45.2°F | +9.7°F | 2.69 in |
| 2022 | 36.3°F | +0.8°F | 1.20 in |
| 2023 | 41.8°F | +6.3°F | 2.33 in |
| 2024 | 38.1°F | +2.6°F | 2.39 in |
| 2025 | 34.0°F | −1.5°F | 0.44 in |
Source: recent months: ACIS, station USW00053904. Records and recent months use complete months only.
How does December in St. Charles compare across Missouri?
Across the 134 places PlainClimate covers in Missouri, December normal highs run from 37°F in Tarkio to 49°F in Neosho; St. Charles's is 44°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- St. Charles in November55°F by day, 35°F at night
- St. Charles in January40°F by day, 22°F at night
- St. Charles through the yearEvery month, frost dates, records and recent years
- Missouri in DecemberThe statewide normal and the warmest and coolest places
- Neosho: Missouri's warmest Decembernormal high 49°F