St. Charles weather in January: St. Charles, Missouri: normal highs, lows, rain and records for January
St. Charles in January has a normal high of 40°F and a normal low of 22°F, a daily mean of 31°F, holding near 40°F all month. Measurable precipitation falls on 7 days in a normal January, 2.49 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 4°C and low of −6°C, 63 mm of precipitation in January.
- 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 January?
The normal high is 40°F and the normal low 22°F, for a daily mean of 30.8°F. January is 4.7°F cooler than December and 4.6°F cooler than February. January is the 12th warmest month of the year in St. Charles and the 10th wettest. Across the month the normal high rises 1°F, from 40°F on January 1 to 41°F on January 31. From one year to the next January's mean temperature typically moves about 4.0°F either way (NOAA's standard deviation), so roughly two Januarys in three average between 27°F and 35°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 24%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| January 1 | 40°F | 24°F | 24% | 13% |
| January 8 | 40°F | 22°F | 23% | 13% |
| January 15 | 39°F | 21°F | 23% | 12% |
| January 22 | 40°F | 21°F | 23% | 12% |
| January 31 | 41°F | 22°F | 23% | 13% |
Every day of January: normal high, low and chance of precipitation (warmest afternoon January 31, coldest night January 19)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| January 1 | 40°F | 24°F | 24% | 13% | 9 h 30 min |
| January 2 | 40°F | 23°F | 24% | 13% | 9 h 30 min |
| January 3 | 40°F | 23°F | 24% | 13% | 9 h 30 min |
| January 4 | 40°F | 23°F | 24% | 13% | 9 h 30 min |
| January 5 | 40°F | 23°F | 23% | 13% | 9 h 30 min |
| January 6 | 40°F | 23°F | 23% | 13% | 9 h 30 min |
| January 7 | 40°F | 22°F | 23% | 13% | 9 h 30 min |
| January 8 | 40°F | 22°F | 23% | 13% | 9 h 30 min |
| January 9 | 39°F | 22°F | 23% | 13% | 9 h 40 min |
| January 10 | 39°F | 22°F | 23% | 13% | 9 h 40 min |
| January 11 | 39°F | 22°F | 23% | 12% | 9 h 40 min |
| January 12 | 39°F | 22°F | 23% | 12% | 9 h 40 min |
| January 13 | 39°F | 22°F | 23% | 12% | 9 h 40 min |
| January 14 | 39°F | 22°F | 23% | 12% | 9 h 40 min |
| January 15 | 39°F | 21°F | 23% | 12% | 9 h 40 min |
| January 16 | 39°F | 21°F | 23% | 12% | 9 h 40 min |
| January 17 | 39°F | 21°F | 23% | 12% | 9 h 50 min |
| January 18 | 39°F | 21°F | 23% | 12% | 9 h 50 min |
| January 19 | 39°F | 21°F | 23% | 12% | 9 h 50 min |
| January 20 | 39°F | 21°F | 23% | 12% | 9 h 50 min |
| January 21 | 39°F | 21°F | 23% | 12% | 9 h 50 min |
| January 22 | 40°F | 21°F | 23% | 12% | 9 h 50 min |
| January 23 | 40°F | 21°F | 23% | 12% | 10 h |
| January 24 | 40°F | 21°F | 23% | 12% | 10 h |
| January 25 | 40°F | 21°F | 23% | 12% | 10 h |
| January 26 | 40°F | 22°F | 23% | 12% | 10 h |
| January 27 | 40°F | 22°F | 23% | 12% | 10 h |
| January 28 | 40°F | 22°F | 23% | 12% | 10 h |
| January 29 | 41°F | 22°F | 23% | 12% | 10 h 10 min |
| January 30 | 41°F | 22°F | 23% | 12% | 10 h 10 min |
| January 31 | 41°F | 22°F | 23% | 13% | 10 h 10 min |
- Normal high
- 40°FJanuary average
- Normal low
- 22°FJanuary average
- Precipitation
- 2.49 inmonth total
- Days with precipitation
- 70.01 inch or more
- Nights at 32°F or colder
- 26
- Daylight
- 9 h 30 min to 10 h 10 minJanuary 1 to January 31
- Sunshine
- 67%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 January?
On a given January day the chance of 0.01 inch or more is 23% on average, highest around January 1 (24%). In all, 2.49 in falls on 7 days of a normal January.
In a normal January in St. Charles, 26 nights fall to freezing and 9 days stay below freezing all day.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00053904.
What are the records for January in St. Charles?
The January mean against the 1991-2020 normal of 30.8°F: 2021 34.1°F (+3.3), 2022 26.9°F (−3.9), 2023 38.1°F (+7.3), 2024 28.8°F (−2.0), 2025 25.3°F (−5.5). 2 of 5 ran warmer than normal.
| January | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 34.1°F | +3.3°F | 2.91 in |
| 2022 | 26.9°F | −3.9°F | 1.12 in |
| 2023 | 38.1°F | +7.3°F | 2.34 in |
| 2024 | 28.8°F | −2.0°F | 3.80 in |
| 2025 | 25.3°F | −5.5°F | 0.51 in |
Source: recent months: ACIS, station USW00053904. Records and recent months use complete months only.
How does January in St. Charles compare across Missouri?
Across the 134 places PlainClimate covers in Missouri, January normal highs run from 32°F in Green City to 46°F in Neosho; St. Charles's is 40°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- St. Charles in December44°F by day, 27°F at night
- St. Charles in February45°F by day, 26°F at night
- St. Charles through the yearEvery month, frost dates, records and recent years
- Missouri in JanuaryThe statewide normal and the warmest and coolest places
- Neosho: Missouri's warmest Januarynormal high 46°F