Weather on January 31
Boulder, CO
55 Years of Data
Avg High
47°F
Avg Low
21°F
Warmest
1997
59°F avg
Coldest
1985
3°F avg
About This Date
January 31st in Boulder, CO typically brings chilly winter weather, with average highs around 47°F and lows near 21°F — a 26°F daily swing. Over 56 years of records, the warmest January 31st was in 1997 (59°F average), while the coldest was 1985 (3°F) — a 56°F range across recorded history. Precipitation has occurred on 20% of recorded January 31st dates, with snow falling 18% of the time (heaviest snowfall: 7.6"). The last decade has been 4.9°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.9°F warmer on this date compared to 20-30 years ago.
Planning for January 31st in Boulder, CO? Bring layers as temperatures can vary throughout the day.
Warming Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 59° | 25° | 42° | — | — |
| 2025 | 55° | 32° | 44° | — | — |
| 2024 | 63° | 32° | 47° | — | — |
| 2023 | 27° | -4° | 12° | — | — |
| 2022 | 61° | 23° | 42° | — | — |
| 2021 | 52° | 27° | 40° | — | — |
| 2020 | 54° | 23° | 39° | — | — |
| 2019 | 46° | 23° | 35° | — | — |
| 2018 | 59° | 24° | 42° | — | — |
| 2017 | 55° | 31° | 43° | — | — |
| 2016 | 35° | 21° | 28° | 0.2" | 0.8" |
| 2015 | 45° | 31° | 38° | — | — |
| 2014 | 38° | 16° | 27° | 1.37" | 4" |
| 2013 | 48° | 24° | 36° | — | — |
| 2012 | 51° | 32° | 42° | — | — |
| 2011 | 33° | 7° | 20° | 0.33" | 2" |
| 2010 | 40° | 21° | 30° | — | — |
| 2009 | 64° | 34° | 49° | — | — |
| 2008 | 43° | 10° | 26° | 0.46" | 3.4" |
| 2007 | 23° | 10° | 17° | 0.23" | 3" |
| 2006 | 58° | 35° | 46° | — | — |
| 2005 | 44° | 26° | 35° | 1.27" | 7.6" |
| 2004 | 52° | 27° | 39° | 0.36" | 1.7" |
| 2003 | 63° | 27° | 45° | — | — |
| 2002 | 31° | 3° | 17° | — | — |
| 2001 | 35° | 18° | 26° | — | — |
| 2000 | 42° | 16° | 29° | — | — |
| 1999 | 46° | 23° | 35° | — | — |
| 1998 | 40° | 31° | 35° | — | — |
| 1997warmest | 66° | 52° | 59° | — | — |
| 1996 | 15° | -2° | 7° | 0.33" | 1.5" |
| 1995 | 54° | 34° | 44° | — | — |
| 1994 | 26° | -3° | 12° | — | — |
| 1993 | 56° | 27° | 41° | — | — |
| 1992 | 63° | 35° | 49° | — | — |
| 1991 | 58° | 29° | 43° | — | — |
| 1990 | 41° | 14° | 28° | — | — |
| 1989 | 69° | 39° | 54° | — | — |
| 1988 | 41° | 20° | 30° | 0.1" | 0.4" |
| 1987 | 55° | 30° | 43° | — | — |
| 1986 | 63° | 36° | 49° | — | — |
| 1985coldest | 14° | -9° | 3° | — | — |
| 1984 | 57° | 22° | 39° | — | — |
| 1983 | 47° | 20° | 33° | 0.03" | — |
| 1982 | 50° | 22° | 36° | — | — |
| 1981 | 40° | 15° | 27° | 0.1" | 0.5" |
| 1980 | 39° | 2° | 20° | — | — |
| 1979 | 38° | -2° | 18° | — | — |
| 1978 | 35° | 18° | 26° | — | — |
| 1977 | 56° | 20° | 38° | — | — |
| 1976 | 55° | 20° | 37° | — | — |
| 1975 | 41° | 12° | 27° | — | — |
| 1974 | 60° | 33° | 47° | — | — |
| 1973 | 46° | 24° | 35° | — | — |
| 1972 | 50° | 19° | 35° | — | — |
| 1971 | 61° | 22° | 41° | — | — |
56 years of data from BOULDER MUNI AP