Weather on June 17
Longmont, CO
55 Years of Data
Avg High
83°F
Avg Low
52°F
Warmest
2021
79°F avg
Coldest
2000
46°F avg
About This Date
June 17th in Longmont, CO typically brings warm summer weather, with average highs around 83°F and lows near 52°F — a 31°F daily swing. Over 55 years of records, the warmest June 17th was in 2021 (79°F average), while the coldest was 2000 (46°F) — a 33°F range across recorded history. Rain or other precipitation has occurred on about 25% of June 17th dates historically, with the wettest June 17th recording 1.75" of rain. The last decade has been 11.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 11.1°F warmer on this date compared to 20-30 years ago.
Planning for June 17th in Longmont, CO? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 94° | 59° | 76° | 0.1" | — |
| 2024 | 85° | 57° | 71° | — | — |
| 2023 | 67° | 47° | 57° | 1.75" | — |
| 2022 | 94° | 62° | 78° | — | — |
| 2021warmest | 98° | 60° | 79° | — | — |
| 2020 | 95° | 55° | 75° | — | — |
| 2019 | 80° | 55° | 68° | 0.1" | — |
| 2018 | 85° | 59° | 72° | — | — |
| 2017 | 90° | 63° | 76° | — | — |
| 2016 | 89° | 56° | 72° | — | — |
| 2015 | 81° | 52° | 66° | — | — |
| 2014 | 86° | 49° | 67° | — | — |
| 2013 | 80° | 51° | 66° | — | — |
| 2012 | 97° | 53° | 75° | — | — |
| 2011 | 85° | 53° | 69° | 0.03" | — |
| 2010 | 85° | 55° | 70° | — | — |
| 2009 | 78° | 50° | 64° | — | — |
| 2008 | 89° | 50° | 70° | — | — |
| 2007 | 96° | 54° | 75° | — | — |
| 2006 | 87° | 53° | 70° | — | — |
| 2005 | 86° | 53° | 70° | — | — |
| 2004 | 56° | 50° | 53° | 0.48" | — |
| 2003 | 85° | 55° | 70° | 0.08" | — |
| 2002 | 87° | 47° | 67° | — | — |
| 2001 | 84° | 55° | 70° | — | — |
| 2000coldest | 54° | 39° | 46° | 0.69" | — |
| 1999 | 60° | 43° | 51° | 0.05" | — |
| 1998 | 75° | 43° | 59° | — | — |
| 1997 | 77° | 46° | 62° | 0.03" | — |
| 1996 | 83° | 47° | 65° | 0.91" | — |
| 1995 | 89° | 59° | 74° | — | — |
| 1994 | 84° | 51° | 68° | — | — |
| 1993 | 85° | 50° | 67° | 0.36" | — |
| 1992 | 80° | 53° | 67° | — | — |
| 1991 | 85° | 48° | 66° | — | — |
| 1990 | 84° | 44° | 64° | — | — |
| 1989 | 97° | 59° | 78° | — | — |
| 1988 | 87° | 51° | 69° | — | — |
| 1987 | 95° | 55° | 75° | — | — |
| 1986 | 91° | 59° | 75° | — | — |
| 1985 | 74° | 56° | 65° | — | — |
| 1984 | 84° | 51° | 68° | — | — |
| 1983 | 85° | 52° | 68° | — | — |
| 1982 | 79° | 47° | 63° | 0.03" | — |
| 1981 | 83° | 54° | 68° | — | — |
| 1980 | 77° | 55° | 66° | — | — |
| 1979 | 82° | 58° | 70° | — | — |
| 1978 | 80° | 50° | 65° | — | — |
| 1977 | 85° | 56° | 70° | — | — |
| 1976 | 87° | 50° | 69° | — | — |
| 1975 | 69° | 44° | 57° | 0.05" | — |
| 1974 | 80° | 53° | 67° | — | — |
| 1973 | 80° | 43° | 61° | — | — |
| 1972 | 85° | 52° | 68° | 0.03" | — |
| 1971 | 92° | 54° | 73° | — | — |
55 years of data from LONGMONT 2 ESE