Weather on January 21
Saint Louis, MO
55 Years of Data
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.
| 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° | 0.08" | 1" |
| 2013 | 29° | 19° | 24° | — | — |
| 2012 | 36° | 16° | 26° | 0.03" | — |
| 2011 | 25° | 5° | 15° | 0.05" | 1.4" |
| 2010 | 45° | 37° | 41° | 0.07" | — |
| 2009 | 32° | 14° | 23° | — | — |
| 2008 | 21° | 7° | 14° | — | — |
| 2007 | 36° | 24° | 30° | 0.24" | 1.1" |
| 2006 | 64° | 35° | 50° | 0.18" | — |
| 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° | 0.11" | — |
| 1998 | 37° | 24° | 31° | — | — |
| 1997 | 60° | 29° | 44° | — | — |
| 1996 | 35° | 7° | 21° | — | — |
| 1995 | 26° | 19° | 23° | — | — |
| 1994 | 31° | -4° | 13° | — | — |
| 1993 | 44° | 32° | 38° | 0.45" | — |
| 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° | 0.01" | — |
| 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° | 0.21" | — |
| 1972 | 56° | 31° | 43° | — | — |
| 1971 | 37° | 6° | 22° | — | — |
Saint Louis, MO Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Saint Louis, MO Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Saint Louis, MO Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Saint Louis, MO
Most pleasant months in Saint Louis, MO: April, May, September, October.
What to expect on January 21st
This page shows what actually happened each year. For the odds — typical high and low, and how often it stays dry — see the climatological outlook for this date.
January 21st outlook →