Weather on January 9
Boulder, CO
55 Years of Data
Avg High
43°F
Avg Low
21°F
Warmest
2002
51°F avg
Coldest
1973
0°F avg
About This Date
January 9th in Boulder, CO typically brings chilly winter weather, with average highs around 43°F and lows near 21°F. Over 56 years of records, the warmest January 9th was in 2002 (51°F average), while the coldest was 1973 (0°F) — a 51°F range across recorded history. Precipitation has occurred on 16% of recorded January 9th dates, with snow falling 14% of the time (heaviest snowfall: 4.1"). The last decade has been 3.6°F cooler on this date compared to 20-30 years ago.
The last decade has been 3.6°F cooler on this date compared to 20-30 years ago.
Planning for January 9th in Boulder, CO? Bring layers as temperatures can vary throughout the day.
Warming Trend
2.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 36° | 23° | 29° | — | — |
| 2025 | 34° | 23° | 28° | — | — |
| 2024 | 45° | 12° | 29° | — | — |
| 2023 | 52° | 32° | 42° | — | — |
| 2022 | 34° | 23° | 29° | — | — |
| 2021 | 32° | 27° | 30° | 0.13" | — |
| 2020 | 46° | 30° | 38° | — | — |
| 2019 | 46° | 27° | 37° | — | — |
| 2018 | 67° | 36° | 51° | — | — |
| 2017 | 50° | 32° | 41° | — | — |
| 2016 | 32° | 11° | 21° | — | — |
| 2015 | 35° | 17° | 26° | 0.3" | 1.1" |
| 2014 | 47° | 19° | 33° | — | — |
| 2013 | 57° | 25° | 41° | — | — |
| 2012 | 52° | 22° | 37° | — | — |
| 2011 | 38° | 21° | 29° | 0.76" | 3.7" |
| 2010 | 49° | 15° | 32° | — | — |
| 2009 | 55° | 36° | 45° | — | — |
| 2008 | 38° | 23° | 30° | 0.08" | 0.7" |
| 2007 | 52° | 22° | 37° | — | — |
| 2006 | 46° | 21° | 34° | — | — |
| 2005 | 57° | 37° | 47° | — | — |
| 2004 | 53° | 33° | 43° | — | — |
| 2003 | 48° | 22° | 35° | — | — |
| 2002warmest | 62° | 40° | 51° | — | — |
| 2001 | 50° | 22° | 36° | — | — |
| 2000 | 45° | 29° | 37° | — | — |
| 1999 | 48° | 17° | 33° | — | — |
| 1998 | 40° | 13° | 26° | 0.05" | 1.1" |
| 1997 | 42° | 18° | 30° | — | — |
| 1996 | 49° | 30° | 39° | — | — |
| 1995 | 55° | 32° | 44° | — | — |
| 1994 | 44° | 27° | 35° | — | — |
| 1993 | 19° | 6° | 13° | 0.41" | 4.1" |
| 1992 | 41° | 18° | 29° | — | — |
| 1991 | 37° | 18° | 27° | — | — |
| 1990 | 58° | 32° | 45° | — | — |
| 1989 | 43° | 17° | 30° | — | — |
| 1988 | 40° | 3° | 21° | — | — |
| 1987 | 42° | 17° | 30° | — | — |
| 1986 | 56° | 30° | 43° | — | — |
| 1985 | 24° | 14° | 19° | 0.03" | — |
| 1984 | 38° | 28° | 33° | — | — |
| 1983 | 52° | 32° | 42° | — | — |
| 1982 | 53° | 17° | 35° | — | — |
| 1981 | 49° | 29° | 39° | — | — |
| 1980 | 29° | 5° | 17° | — | — |
| 1979 | 36° | 11° | 23° | — | — |
| 1978 | 31° | 9° | 20° | — | — |
| 1977 | 23° | -10° | 7° | 0.08" | 1.1" |
| 1976 | 49° | 18° | 33° | — | — |
| 1975 | 37° | 25° | 31° | 0.18" | 1.2" |
| 1974 | 22° | -7° | 7° | — | — |
| 1973coldest | 10° | -11° | 0° | — | 0.5" |
| 1972 | 50° | 28° | 39° | — | — |
| 1971 | 50° | 31° | 40° | — | — |
56 years of data from BOULDER MUNI AP