Weather on June 15
Longmont, CO
55 Years of Data
About This Date
June 15th in Longmont, CO typically brings warm summer weather, with average highs around 85°F and lows near 51°F — a 34°F daily swing. Over 55 years of records, the warmest June 15th was in 2021 (79°F average), while the coldest was 1976 (55°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 18% of June 15th dates historically, with the wettest June 15th recording 0.74" of rain. The last decade has been 6.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 6.0°F warmer on this date compared to 20-30 years ago.
Planning for June 15th in Longmont, CO? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 95° | 57° | 76° | — | — |
| 2024 | 80° | 59° | 70° | 0.03" | — |
| 2023 | 81° | 52° | 66° | — | — |
| 2022 | 85° | 52° | 68° | — | — |
| 2021warmest | 98° | 60° | 79° | — | — |
| 2020 | 92° | 53° | 72° | — | — |
| 2019 | 81° | 53° | 67° | — | — |
| 2018 | 97° | 60° | 78° | — | — |
| 2017 | 89° | 51° | 70° | — | — |
| 2016 | 89° | 52° | 70° | — | — |
| 2015 | 79° | 53° | 66° | — | — |
| 2014 | 76° | 41° | 58° | — | — |
| 2013 | 83° | 52° | 67° | — | — |
| 2012 | 84° | 57° | 71° | 0.15" | — |
| 2011 | 88° | 49° | 68° | — | — |
| 2010 | 78° | 45° | 61° | — | — |
| 2009 | 68° | 47° | 57° | 0.74" | — |
| 2008 | 86° | 52° | 69° | — | — |
| 2007 | 88° | 49° | 68° | — | — |
| 2006 | 95° | 55° | 75° | — | — |
| 2005 | 81° | 49° | 65° | 0.05" | — |
| 2004 | 85° | 54° | 69° | — | — |
| 2003 | 83° | 57° | 70° | — | — |
| 2002 | 85° | 50° | 67° | — | — |
| 2001 | 71° | 45° | 58° | — | — |
| 2000 | 90° | 56° | 73° | — | — |
| 1999 | 74° | 45° | 59° | 0.15" | — |
| 1998 | 79° | 40° | 59° | 0.15" | — |
| 1997 | 82° | 45° | 63° | 0.03" | — |
| 1996 | 87° | 59° | 73° | — | — |
| 1995 | 94° | 53° | 73° | — | — |
| 1994 | 101° | 45° | 73° | — | — |
| 1993 | 88° | 55° | 71° | — | — |
| 1992 | 79° | 56° | 67° | — | — |
| 1991 | 84° | 50° | 67° | 0.64" | — |
| 1990 | 85° | 53° | 69° | — | — |
| 1989 | 67° | 45° | 56° | — | — |
| 1988 | 77° | 50° | 64° | 0.64" | — |
| 1987 | 92° | 53° | 72° | — | — |
| 1986 | 91° | 50° | 71° | — | — |
| 1985 | 88° | 53° | 70° | — | — |
| 1984 | 88° | 55° | 71° | — | — |
| 1983 | 72° | 43° | 57° | — | — |
| 1982 | 74° | 52° | 63° | — | — |
| 1981 | 66° | 44° | 55° | — | — |
| 1980 | 94° | 52° | 73° | — | — |
| 1979 | 91° | 57° | 74° | — | — |
| 1978 | 97° | 52° | 74° | — | — |
| 1977 | 96° | 52° | 74° | — | — |
| 1976coldest | 66° | 44° | 55° | — | — |
| 1975 | 87° | 46° | 67° | — | — |
| 1974 | 93° | 57° | 75° | — | — |
| 1973 | 81° | 55° | 68° | 0.05" | — |
| 1972 | 84° | 50° | 67° | — | — |
| 1971 | 86° | 51° | 69° | — | — |
Longmont, CO Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Longmont, CO Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Longmont, CO Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Longmont, CO
Longmont, CO has no months that meet our "pleasant" threshold — every season has tradeoffs.