Weather on January 20
Boulder, CO
55 Years of Data
Avg High
46°F
Avg Low
22°F
Warmest
2005
60°F avg
Coldest
2025
3°F avg
About This Date
January 20th in Boulder, CO typically brings chilly winter weather, with average highs around 46°F and lows near 22°F. Over 56 years of records, the warmest January 20th was in 2005 (60°F average), while the coldest was 2025 (3°F) — a 57°F range across recorded history. Precipitation has occurred on 14% of recorded January 20th dates, with snow falling 13% of the time (heaviest snowfall: 9.1"). The last decade has been 7.7°F cooler on this date compared to 20-30 years ago.
The last decade has been 7.7°F cooler on this date compared to 20-30 years ago.
Planning for January 20th in Boulder, CO? Bring layers as temperatures can vary throughout the day.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 55° | 21° | 38° | — | — |
| 2025coldest | 12° | -6° | 3° | — | — |
| 2024 | 36° | 19° | 28° | — | — |
| 2023 | 32° | 19° | 26° | — | — |
| 2022 | 27° | 18° | 23° | — | — |
| 2021 | 59° | 21° | 40° | — | — |
| 2020 | 51° | 19° | 35° | — | — |
| 2019 | 50° | 32° | 41° | — | — |
| 2018 | 62° | 31° | 46° | — | — |
| 2017 | 43° | 27° | 35° | — | — |
| 2016 | 51° | 24° | 38° | — | — |
| 2015 | 49° | 24° | 36° | — | — |
| 2014 | 51° | 31° | 41° | — | — |
| 2013 | 52° | 25° | 38° | — | — |
| 2012 | 58° | 42° | 50° | — | — |
| 2011 | 33° | 8° | 21° | 0.03" | 0.2" |
| 2010 | 39° | 24° | 32° | — | — |
| 2009 | 71° | 34° | 52° | — | — |
| 2008 | 40° | 16° | 28° | — | — |
| 2007 | 34° | 12° | 23° | — | — |
| 2006 | 43° | 15° | 29° | 0.15" | 0.8" |
| 2005warmest | 73° | 46° | 60° | — | — |
| 2004 | 37° | 26° | 32° | 0.28" | 1" |
| 2003 | 60° | 40° | 50° | — | — |
| 2002 | 37° | 20° | 28° | — | — |
| 2001 | 45° | 18° | 31° | — | — |
| 2000 | 54° | 21° | 37° | — | — |
| 1999 | 52° | 32° | 42° | — | — |
| 1998 | 47° | 26° | 36° | — | — |
| 1997 | 64° | 32° | 48° | — | — |
| 1996 | 42° | 27° | 34° | — | — |
| 1995 | 42° | 22° | 32° | — | — |
| 1994 | 49° | 18° | 33° | — | — |
| 1993 | 51° | 19° | 35° | — | — |
| 1992 | 53° | 25° | 39° | — | — |
| 1991 | 29° | 7° | 18° | 0.51" | 3.1" |
| 1990 | 29° | 12° | 20° | 0.66" | — |
| 1989 | 56° | 20° | 38° | — | — |
| 1988 | 34° | 9° | 21° | — | — |
| 1987 | 30° | 5° | 18° | 0.18" | 0.8" |
| 1986 | 69° | 40° | 54° | — | — |
| 1985 | 27° | 4° | 15° | 0.05" | 0.5" |
| 1984 | 24° | -9° | 8° | — | — |
| 1983 | 37° | 14° | 26° | — | — |
| 1982 | 43° | 22° | 32° | — | — |
| 1981 | 48° | 25° | 36° | — | — |
| 1980 | 30° | 9° | 19° | — | — |
| 1979 | 45° | 24° | 34° | — | — |
| 1978 | 32° | 8° | 20° | — | — |
| 1977 | 56° | 23° | 39° | — | — |
| 1976 | 49° | 17° | 33° | — | — |
| 1975 | 60° | 32° | 46° | — | — |
| 1974 | 53° | 30° | 42° | — | — |
| 1973 | 39° | 26° | 33° | 1.4" | 9.1" |
| 1972 | 56° | 35° | 45° | — | — |
| 1971 | 68° | 41° | 55° | — | — |
56 years of data from BOULDER MUNI AP