Weather on April 9
Boulder, CO
55 Years of Data
Avg High
63°F
Avg Low
34°F
Warmest
2014
64°F avg
Coldest
1973
20°F avg
About This Date
April 9th in Boulder, CO typically brings mild spring weather, with average highs around 63°F and lows near 34°F — a 29°F daily swing. Over 56 years of records, the warmest April 9th was in 2014 (64°F average), while the coldest was 1973 (20°F) — a 44°F range across recorded history. Precipitation has occurred on 25% of recorded April 9th dates, with snow falling 14% of the time (heaviest snowfall: 13.1"). The last decade has been 5.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.2°F warmer on this date compared to 20-30 years ago.
Planning for April 9th in Boulder, CO? Great weather for outdoor activities.
Warming Trend
1.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 75° | 37° | 56° | — | — |
| 2025 | 72° | 48° | 60° | — | — |
| 2024 | 61° | 32° | 46° | — | — |
| 2023 | 70° | 39° | 54° | — | — |
| 2022 | 77° | 46° | 62° | — | — |
| 2021 | 55° | 36° | 45° | — | — |
| 2020 | 57° | 36° | 46° | — | — |
| 2019 | 77° | 46° | 62° | — | — |
| 2018 | 59° | 34° | 46° | — | — |
| 2017 | 70° | 39° | 54° | — | — |
| 2016 | 75° | 34° | 54° | — | — |
| 2015 | 54° | 35° | 44° | 0.2" | — |
| 2014warmest | 75° | 53° | 64° | — | — |
| 2013 | 48° | 15° | 32° | 1.7" | 13.1" |
| 2012 | 66° | 34° | 50° | — | — |
| 2011 | 71° | 36° | 53° | — | — |
| 2010 | 66° | 37° | 52° | — | — |
| 2009 | 63° | 35° | 49° | — | — |
| 2008 | 55° | 31° | 43° | — | — |
| 2007 | 68° | 29° | 48° | — | — |
| 2006 | 77° | 43° | 60° | — | — |
| 2005 | 70° | 37° | 53° | — | — |
| 2004 | 47° | 33° | 40° | 2.34" | 0.2" |
| 2003 | 75° | 32° | 54° | — | — |
| 2002 | 72° | 35° | 53° | — | — |
| 2001 | 61° | 32° | 46° | — | — |
| 2000 | 74° | 38° | 56° | — | — |
| 1999 | 62° | 31° | 46° | — | — |
| 1998 | 57° | 29° | 43° | 0.05" | — |
| 1997 | 37° | 24° | 31° | — | — |
| 1996 | 74° | 42° | 58° | — | — |
| 1995 | 62° | 31° | 46° | 0.08" | 0.2" |
| 1994 | 46° | 32° | 39° | 1.47" | 1.8" |
| 1993 | 69° | 40° | 54° | — | — |
| 1992 | 73° | 38° | 55° | — | — |
| 1991 | 58° | 28° | 43° | — | — |
| 1990 | 55° | 36° | 45° | 0.43" | — |
| 1989 | 43° | 20° | 31° | 1.91" | 11.8" |
| 1988 | 37° | 27° | 32° | 0.79" | 2.7" |
| 1987 | 62° | 40° | 51° | — | — |
| 1986 | 57° | 41° | 49° | 0.66" | — |
| 1985 | 68° | 38° | 53° | 0.03" | — |
| 1984 | 54° | 31° | 42° | 0.3" | — |
| 1983 | 53° | 25° | 39° | — | — |
| 1982 | 56° | 26° | 41° | — | — |
| 1981 | 74° | 34° | 54° | — | — |
| 1980 | 65° | 29° | 47° | — | — |
| 1979 | 68° | 35° | 52° | — | — |
| 1978 | 65° | 31° | 48° | 5.21" | 5.2" |
| 1977 | 78° | 38° | 58° | — | — |
| 1976 | 72° | 32° | 52° | — | — |
| 1975 | 49° | 24° | 36° | — | — |
| 1974 | 65° | 35° | 50° | — | — |
| 1973coldest | 32° | 8° | 20° | 0.25" | 2.2" |
| 1972 | 75° | 36° | 55° | — | — |
| 1971 | 68° | 32° | 50° | — | — |
56 years of data from BOULDER MUNI AP