Weather on May 23
Boulder, CO
55 Years of Data
Avg High
72°F
Avg Low
45°F
Warmest
1989
73°F avg
Coldest
2019
41°F avg
About This Date
May 23rd in Boulder, CO typically brings pleasant spring weather, with average highs around 72°F and lows near 45°F — a 27°F daily swing. Over 55 years of records, the warmest May 23rd was in 1989 (73°F average), while the coldest was 2019 (41°F) — a 32°F range across recorded history. Rain or other precipitation has occurred on about 44% of May 23rd dates historically, with the wettest May 23rd recording 2.72" of rain. The last decade has been 3.5°F cooler on this date compared to 20-30 years ago.
The last decade has been 3.5°F cooler on this date compared to 20-30 years ago.
Planning for May 23rd in Boulder, CO? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 81° | 48° | 64° | — | — |
| 2024 | 81° | 45° | 63° | — | — |
| 2023 | 77° | 50° | 64° | — | — |
| 2022 | 61° | 41° | 51° | — | — |
| 2021 | 75° | 50° | 63° | 0.61" | — |
| 2020 | 77° | 50° | 64° | — | — |
| 2019coldest | 45° | 37° | 41° | — | — |
| 2018 | 73° | 50° | 62° | — | — |
| 2017 | 65° | 35° | 50° | 0.41" | — |
| 2016 | 69° | 43° | 56° | — | — |
| 2015 | 58° | 42° | 50° | 0.89" | — |
| 2014 | 72° | 46° | 59° | — | — |
| 2013 | 74° | 48° | 61° | 0.15" | — |
| 2012 | 88° | 51° | 69° | 0.46" | — |
| 2011 | 73° | 48° | 61° | 0.03" | — |
| 2010 | 81° | 41° | 61° | — | — |
| 2009 | 59° | 48° | 54° | — | — |
| 2008 | 69° | 38° | 53° | — | — |
| 2007 | 56° | 38° | 47° | 0.2" | — |
| 2006 | 76° | 46° | 61° | 0.38" | — |
| 2005 | 87° | 54° | 70° | 0.05" | — |
| 2004 | 76° | 42° | 59° | — | — |
| 2003 | 78° | 46° | 62° | — | — |
| 2002 | 65° | 38° | 51° | 0.51" | — |
| 2001 | 79° | 43° | 61° | — | — |
| 2000 | 90° | 56° | 73° | — | — |
| 1999 | 71° | 49° | 60° | 0.43" | — |
| 1998 | 71° | 40° | 55° | 0.46" | — |
| 1997 | 68° | 45° | 56° | 0.03" | — |
| 1996 | 81° | 51° | 66° | 0.76" | — |
| 1995 | 52° | 34° | 43° | 2.72" | — |
| 1994 | 83° | 43° | 63° | — | — |
| 1993 | 76° | 43° | 59° | — | — |
| 1992 | 61° | 45° | 53° | 0.28" | — |
| 1991 | 61° | 47° | 54° | 0.84" | — |
| 1990 | 85° | 47° | 66° | — | — |
| 1989warmest | 90° | 56° | 73° | — | — |
| 1988 | 68° | 46° | 57° | — | — |
| 1987 | 67° | 51° | 59° | 0.08" | — |
| 1986 | 69° | 40° | 54° | — | — |
| 1985 | 77° | 41° | 59° | 0.18" | — |
| 1984 | 89° | 44° | 67° | — | — |
| 1983 | 76° | 39° | 57° | — | — |
| 1982 | 74° | 49° | 61° | — | — |
| 1981 | 67° | 45° | 56° | — | — |
| 1980 | 79° | 49° | 64° | 0.69" | — |
| 1979 | 75° | 48° | 62° | 0.03" | — |
| 1978 | 82° | 48° | 65° | — | — |
| 1977 | 86° | 45° | 65° | — | — |
| 1976 | 53° | 43° | 48° | 0.25" | — |
| 1975 | 60° | 37° | 49° | 0.89" | — |
| 1974 | 72° | 44° | 58° | — | — |
| 1973 | 79° | 45° | 62° | — | — |
| 1972 | 73° | 42° | 58° | — | — |
| 1971 | 57° | 40° | 48° | 0.28" | — |
55 years of data from BOULDER MUNI AP