Weather on May 17
Boulder, CO
55 Years of Data
Avg High
72°F
Avg Low
45°F
Warmest
1988
74°F avg
Coldest
1983
36°F avg
About This Date
May 17th 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 17th was in 1988 (74°F average), while the coldest was 1983 (36°F) — a 38°F range across recorded history. Rain or other precipitation has occurred on about 47% of May 17th dates historically, with the wettest May 17th recording 8.92" of rain. The last decade has been 2.4°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.4°F cooler on this date compared to 20-30 years ago.
Planning for May 17th in Boulder, CO? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
0.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 70° | 46° | 58° | — | — |
| 2024 | 82° | 54° | 68° | — | — |
| 2023 | 79° | 48° | 63° | — | — |
| 2022 | 82° | 52° | 67° | — | — |
| 2021 | 63° | 48° | 55° | 2.03" | — |
| 2020 | 72° | 43° | 57° | — | — |
| 2019 | 68° | 45° | 56° | — | — |
| 2018 | 79° | 52° | 65° | — | — |
| 2017 | 73° | 38° | 55° | 0.03" | — |
| 2016 | 45° | 36° | 40° | 0.36" | — |
| 2015 | 69° | 42° | 56° | 0.2" | — |
| 2014 | 66° | 41° | 54° | 0.33" | — |
| 2013 | 86° | 48° | 67° | — | — |
| 2012 | 80° | 46° | 63° | 0.05" | — |
| 2011 | 59° | 39° | 49° | 0.1" | — |
| 2010 | 74° | 40° | 57° | — | — |
| 2009 | 75° | 46° | 61° | — | — |
| 2008 | 76° | 48° | 62° | — | — |
| 2007 | 72° | 45° | 58° | — | — |
| 2006 | 82° | 46° | 64° | — | — |
| 2005 | 75° | 54° | 64° | — | — |
| 2004 | 72° | 48° | 60° | 0.05" | — |
| 2003 | 84° | 49° | 66° | — | — |
| 2002 | 59° | 42° | 51° | 0.2" | — |
| 2001 | 78° | 52° | 65° | 0.33" | — |
| 2000 | 74° | 25° | 49° | 1.09" | — |
| 1999 | 61° | 32° | 46° | 0.33" | — |
| 1998 | 83° | 46° | 64° | — | — |
| 1997 | 85° | 53° | 69° | — | — |
| 1996 | 88° | 61° | 74° | — | — |
| 1995 | 59° | 36° | 47° | 8.92" | — |
| 1994 | 88° | 48° | 68° | — | — |
| 1993 | 63° | 47° | 55° | 1.32" | — |
| 1992 | 77° | 41° | 59° | — | — |
| 1991 | 64° | 42° | 53° | 0.08" | — |
| 1990 | 69° | 34° | 51° | — | — |
| 1989 | 72° | 40° | 56° | — | — |
| 1988warmest | 85° | 63° | 74° | 0.48" | — |
| 1987 | 71° | 53° | 62° | 0.28" | — |
| 1986 | 61° | 36° | 48° | 0.43" | — |
| 1985 | 65° | 47° | 56° | 0.13" | — |
| 1984 | 77° | 44° | 61° | — | — |
| 1983coldest | 39° | 34° | 36° | 7.04" | — |
| 1982 | 70° | 41° | 55° | — | — |
| 1981 | 51° | 43° | 47° | 1.63" | — |
| 1980 | 50° | 38° | 44° | 0.76" | — |
| 1979 | 84° | 46° | 65° | — | — |
| 1978 | 84° | 44° | 64° | 2.67" | — |
| 1977 | 74° | 42° | 58° | — | — |
| 1976 | 71° | 33° | 52° | 0.03" | — |
| 1975 | 79° | 55° | 67° | 0.36" | — |
| 1974 | 71° | 49° | 60° | — | — |
| 1973 | 78° | 48° | 63° | — | — |
| 1972 | 81° | 50° | 65° | — | — |
| 1971 | 78° | 38° | 58° | 0.41" | — |
55 years of data from BOULDER MUNI AP