Weather on January 1
Boulder, CO
55 Years of Data
Avg High
41°F
Avg Low
18°F
Warmest
1997
55°F avg
Coldest
1974
1°F avg
About This Date
January 1st in Boulder, CO typically brings chilly winter weather, with average highs around 41°F and lows near 18°F. Over 56 years of records, the warmest January 1st was in 1997 (55°F average), while the coldest was 1974 (1°F) — a 54°F range across recorded history. Precipitation has occurred on 11% of recorded January 1st dates, with snow falling 11% of the time (heaviest snowfall: 7.5"). The last decade has been 8.3°F cooler on this date compared to 20-30 years ago.
The last decade has been 8.3°F cooler on this date compared to 20-30 years ago.
Planning for January 1st in Boulder, CO? Bring layers as temperatures can vary throughout the day.
Warming Trend
1.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 57° | 37° | 47° | — | — |
| 2025 | 45° | 16° | 30° | — | — |
| 2024 | 55° | 25° | 40° | — | — |
| 2023 | 37° | 28° | 33° | — | — |
| 2022 | 14° | 3° | 9° | — | — |
| 2021 | 43° | 28° | 36° | — | — |
| 2020 | 52° | 28° | 40° | — | — |
| 2019 | 14° | 3° | 9° | — | — |
| 2018 | 30° | 12° | 21° | — | — |
| 2017 | 47° | 30° | 38° | — | — |
| 2016 | 39° | 3° | 21° | — | — |
| 2015 | 32° | 6° | 19° | — | — |
| 2014 | 48° | 27° | 37° | 0.03" | 0.1" |
| 2013 | 30° | 8° | 19° | — | — |
| 2012 | 35° | 19° | 27° | — | — |
| 2011 | 25° | 1° | 13° | — | — |
| 2010 | 41° | 19° | 30° | — | — |
| 2009 | 55° | 45° | 50° | — | — |
| 2008 | 30° | 12° | 21° | — | — |
| 2007 | 43° | 19° | 31° | — | — |
| 2006 | 57° | 40° | 48° | — | — |
| 2005 | 45° | 22° | 33° | — | — |
| 2004 | 54° | 30° | 42° | — | — |
| 2003 | 49° | 31° | 40° | — | — |
| 2002 | 26° | 19° | 23° | 0.23" | 1.4" |
| 2001 | 34° | 17° | 25° | — | — |
| 2000 | 54° | 29° | 41° | — | — |
| 1999 | 45° | 31° | 38° | — | — |
| 1998 | 66° | 39° | 53° | — | — |
| 1997warmest | 70° | 41° | 55° | — | — |
| 1996 | 34° | 23° | 28° | 0.56" | 3.5" |
| 1995 | 44° | -4° | 20° | 0.15" | 1.7" |
| 1994 | 50° | 25° | 37° | — | — |
| 1993 | 44° | 16° | 30° | — | — |
| 1992 | 42° | 23° | 33° | — | — |
| 1991 | 56° | 32° | 44° | — | — |
| 1990 | 43° | 5° | 24° | — | — |
| 1989 | 46° | 20° | 33° | — | — |
| 1988 | 27° | 2° | 14° | — | — |
| 1987 | 36° | 14° | 25° | — | — |
| 1986 | 59° | 23° | 41° | — | — |
| 1985 | 29° | 9° | 19° | 1.17" | 7.5" |
| 1984 | 44° | 12° | 28° | — | — |
| 1983 | 36° | 5° | 20° | — | — |
| 1982 | 45° | 17° | 31° | — | — |
| 1981 | 50° | 36° | 43° | — | — |
| 1980 | 51° | 29° | 40° | — | — |
| 1979 | 13° | -7° | 3° | — | — |
| 1978 | 23° | 3° | 13° | — | — |
| 1977 | 23° | 1° | 12° | — | — |
| 1976 | 26° | 4° | 15° | — | — |
| 1975 | 39° | 12° | 26° | — | — |
| 1974coldest | 9° | -8° | 1° | 0.03" | 0.2" |
| 1973 | 33° | 10° | 22° | — | — |
| 1972 | 45° | 20° | 32° | — | — |
| 1971 | 51° | 23° | 37° | — | — |
56 years of data from BOULDER MUNI AP