Weather on January 21
Saint Louis, MO
55 Years of Data
Avg High
40°F
Avg Low
21°F
Warmest
2018
56°F avg
Coldest
2025
8°F avg
About This Date
January 21st in Saint Louis, MO typically brings chilly winter weather, with average highs around 40°F and lows near 21°F. Over 55 years of records, the warmest January 21st was in 2018 (56°F average), while the coldest was 2025 (8°F) — a 48°F range across recorded history. Precipitation has occurred on 18% of recorded January 21st dates, with snow falling 5% of the time (heaviest snowfall: 1.4"). Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for January 21st in Saint Louis, MO? Bring layers as temperatures can vary throughout the day.
Cooling Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 51° | 33° | 42° | — | — |
| 2025coldest | 14° | 2° | 8° | — | — |
| 2024 | 32° | 4° | 18° | — | — |
| 2023 | 43° | 23° | 33° | — | — |
| 2022 | 27° | 5° | 16° | — | — |
| 2021 | 54° | 30° | 42° | — | — |
| 2020 | 32° | 18° | 25° | — | — |
| 2019 | 24° | 8° | 16° | — | — |
| 2018warmest | 67° | 46° | 56° | — | — |
| 2017 | 59° | 48° | 54° | — | — |
| 2016 | 28° | 17° | 23° | — | — |
| 2015 | 51° | 35° | 43° | — | — |
| 2014 | 50° | 11° | 30° | 0.2" | 1" |
| 2013 | 29° | 19° | 24° | — | — |
| 2012 | 36° | 16° | 26° | 0.08" | — |
| 2011 | 25° | 5° | 15° | 0.13" | 1.4" |
| 2010 | 45° | 37° | 41° | 0.18" | — |
| 2009 | 32° | 14° | 23° | — | — |
| 2008 | 21° | 7° | 14° | — | — |
| 2007 | 36° | 24° | 30° | 0.61" | 1.1" |
| 2006 | 64° | 35° | 50° | 0.46" | — |
| 2005 | 58° | 29° | 43° | — | — |
| 2004 | 46° | 19° | 33° | — | — |
| 2003 | 42° | 20° | 31° | — | — |
| 2002 | 40° | 20° | 30° | — | — |
| 2001 | 27° | 14° | 20° | — | — |
| 2000 | 27° | 12° | 19° | — | — |
| 1999 | 45° | 29° | 37° | 0.28" | — |
| 1998 | 37° | 24° | 31° | — | — |
| 1997 | 60° | 29° | 44° | — | — |
| 1996 | 35° | 7° | 21° | — | — |
| 1995 | 26° | 19° | 23° | — | — |
| 1994 | 31° | -4° | 13° | — | — |
| 1993 | 44° | 32° | 38° | 1.14" | — |
| 1992 | 58° | 29° | 43° | — | — |
| 1991 | 24° | 9° | 16° | — | — |
| 1990 | 46° | 32° | 39° | — | — |
| 1989 | 46° | 20° | 33° | — | — |
| 1988 | 37° | 22° | 29° | — | — |
| 1987 | 39° | 28° | 34° | — | — |
| 1986 | 78° | 32° | 55° | — | — |
| 1985 | 21° | 17° | 19° | — | — |
| 1983 | 38° | 27° | 32° | 0.03" | — |
| 1982 | 35° | 31° | 33° | — | — |
| 1981 | 38° | 28° | 33° | — | — |
| 1980 | 37° | 22° | 29° | — | — |
| 1979 | 36° | 24° | 30° | — | — |
| 1978 | 29° | 6° | 17° | — | — |
| 1977 | 32° | 10° | 21° | — | — |
| 1976 | 39° | 18° | 28° | — | — |
| 1975 | 34° | 9° | 21° | — | — |
| 1974 | 59° | 40° | 49° | — | — |
| 1973 | 53° | 25° | 39° | 0.53" | — |
| 1972 | 56° | 31° | 43° | — | — |
| 1971 | 37° | 6° | 22° | — | — |
55 years of data from CAHOKIA