Weather on January 15
Boulder, CO
55 Years of Data
Avg High
47°F
Avg Low
22°F
Warmest
1974
53°F avg
Coldest
2024
-3°F avg
About This Date
January 15th in Boulder, CO typically brings chilly winter weather, with average highs around 47°F and lows near 22°F — a 25°F daily swing. Over 56 years of records, the warmest January 15th was in 1974 (53°F average), while the coldest was 2024 (-3°F) — a 56°F range across recorded history. Precipitation has occurred on 13% of recorded January 15th dates, with snow falling 13% of the time (heaviest snowfall: 10"). The last decade has been 3.9°F cooler on this date compared to 20-30 years ago.
The last decade has been 3.9°F cooler on this date compared to 20-30 years ago.
Planning for January 15th in Boulder, CO? Bring layers as temperatures can vary throughout the day.
Cooling Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 61° | 28° | 44° | — | — |
| 2025 | 52° | 19° | 35° | — | — |
| 2024coldest | 3° | -9° | -3° | — | — |
| 2023 | 46° | 32° | 39° | — | — |
| 2022 | 52° | 21° | 37° | — | — |
| 2021 | 46° | 21° | 34° | — | — |
| 2020 | 43° | 25° | 34° | — | — |
| 2019 | 50° | 25° | 38° | — | — |
| 2018 | 38° | 16° | 27° | 0.15" | 1.7" |
| 2017 | 39° | 25° | 32° | — | — |
| 2016 | 39° | 23° | 31° | — | — |
| 2015 | 57° | 23° | 40° | — | — |
| 2014 | 53° | 20° | 36° | — | — |
| 2013 | 29° | -3° | 13° | — | — |
| 2012 | 56° | 43° | 49° | — | — |
| 2011 | 51° | 32° | 42° | — | — |
| 2010 | 49° | 24° | 36° | — | — |
| 2009 | 46° | 26° | 36° | — | — |
| 2008 | 50° | 29° | 39° | — | — |
| 2007 | 28° | -4° | 12° | — | — |
| 2006 | 57° | 38° | 47° | — | — |
| 2005 | 34° | 8° | 21° | 0.03" | 0.1" |
| 2004 | 56° | 32° | 44° | — | — |
| 2003 | 52° | 26° | 39° | — | — |
| 2002 | 29° | 15° | 22° | — | — |
| 2001 | 33° | 16° | 24° | — | — |
| 2000 | 63° | 34° | 48° | — | — |
| 1999 | 59° | 42° | 51° | — | — |
| 1998 | 49° | 28° | 38° | — | — |
| 1997 | 44° | 6° | 25° | — | — |
| 1996 | 61° | 26° | 43° | — | — |
| 1995 | 63° | 35° | 49° | — | — |
| 1994 | 59° | 28° | 44° | — | — |
| 1993 | 51° | 24° | 38° | — | — |
| 1992 | 32° | -5° | 14° | 0.3" | 2" |
| 1991 | 37° | 23° | 30° | — | — |
| 1990 | 60° | 20° | 40° | — | — |
| 1989 | 36° | 14° | 25° | — | — |
| 1988 | 62° | 33° | 48° | — | — |
| 1987 | 30° | 8° | 19° | 0.99" | 10" |
| 1986 | 64° | 29° | 46° | — | — |
| 1985 | 49° | 24° | 36° | — | — |
| 1984 | 18° | -5° | 6° | 0.08" | 0.4" |
| 1983 | 38° | 19° | 28° | — | — |
| 1982 | 51° | 29° | 40° | — | — |
| 1981 | 43° | 22° | 32° | — | — |
| 1980 | 54° | 34° | 44° | — | — |
| 1979 | 46° | 12° | 29° | — | — |
| 1978 | 45° | 19° | 32° | 0.33" | 2" |
| 1977 | 37° | 6° | 22° | 0.03" | 0.8" |
| 1976 | 56° | 34° | 45° | — | — |
| 1975 | 56° | 42° | 49° | — | — |
| 1974warmest | 64° | 43° | 53° | — | — |
| 1973 | 59° | 38° | 48° | — | — |
| 1972 | 29° | -8° | 11° | — | — |
| 1971 | 44° | 30° | 37° | — | — |
56 years of data from BOULDER MUNI AP