Weather on August 9
Longmont, CO
55 Years of Data
Avg High
88°F
Avg Low
56°F
Warmest
2006
80°F avg
Coldest
2024
60°F avg
About This Date
August 9th in Longmont, CO typically brings warm summer weather, with average highs around 88°F and lows near 56°F — a 32°F daily swing. Over 55 years of records, the warmest August 9th was in 2006 (80°F average), while the coldest was 2024 (60°F) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 16% of August 9th dates historically, with the wettest August 9th recording 1.27" of rain. The last decade has been 2.0°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.0°F cooler on this date compared to 20-30 years ago.
Planning for August 9th in Longmont, CO? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 98° | 59° | 79° | — | — |
| 2024coldest | 63° | 57° | 60° | 0.3" | — |
| 2023 | 82° | 55° | 69° | 0.03" | — |
| 2022 | 91° | 62° | 77° | — | — |
| 2021 | 93° | 57° | 75° | — | — |
| 2020 | 94° | 56° | 75° | — | — |
| 2019 | 86° | 61° | 73° | — | — |
| 2018 | 85° | 56° | 70° | — | — |
| 2017 | 76° | 52° | 64° | — | — |
| 2016 | 95° | 57° | 76° | — | — |
| 2015 | 89° | 57° | 73° | — | — |
| 2014 | 86° | 55° | 71° | — | — |
| 2013 | 81° | 53° | 67° | — | — |
| 2012 | 90° | 56° | 73° | — | — |
| 2011 | 95° | 53° | 74° | — | — |
| 2010 | 86° | 59° | 73° | 1.19" | — |
| 2009 | 84° | 58° | 71° | — | — |
| 2008 | 87° | 58° | 72° | 0.03" | — |
| 2007 | 92° | 60° | 76° | — | — |
| 2006warmest | 94° | 67° | 80° | — | — |
| 2005 | 90° | 62° | 76° | 0.03" | — |
| 2004 | 92° | 59° | 75° | — | — |
| 2003 | 90° | 58° | 74° | — | — |
| 2002 | 94° | — | — | — | — |
| 2001 | 96° | 55° | 76° | — | — |
| 2000 | 98° | 54° | 76° | — | — |
| 1999 | 90° | 51° | 70° | — | — |
| 1998 | 97° | 53° | 75° | — | — |
| 1997 | 94° | 51° | 72° | — | — |
| 1996 | 88° | 52° | 70° | — | — |
| 1995 | — | 58° | — | — | — |
| 1994 | 87° | 60° | 74° | — | — |
| 1993 | 92° | 51° | 71° | — | — |
| 1992 | 91° | 53° | 72° | — | — |
| 1991 | 84° | 56° | 70° | — | — |
| 1990 | 91° | 57° | 74° | — | — |
| 1989 | 84° | 53° | 69° | — | — |
| 1988 | 85° | 52° | 68° | — | — |
| 1987 | 81° | 55° | 68° | — | — |
| 1986 | 85° | 53° | 69° | 0.3" | — |
| 1985 | 72° | 54° | 63° | — | — |
| 1984 | 91° | 55° | 73° | — | — |
| 1983 | 93° | 58° | 75° | — | — |
| 1982 | 90° | 60° | 75° | — | — |
| 1981 | 83° | 55° | 69° | — | — |
| 1980 | 82° | 61° | 71° | — | — |
| 1979 | 92° | 64° | 78° | — | — |
| 1978 | 89° | 53° | 71° | 1.27" | — |
| 1977 | 81° | 52° | 66° | 0.13" | — |
| 1976 | 83° | 58° | 70° | — | — |
| 1975 | 87° | 51° | 69° | — | — |
| 1974 | 78° | 49° | 63° | 0.28" | — |
| 1973 | 90° | 52° | 71° | — | — |
| 1972 | 82° | 57° | 70° | — | — |
| 1971 | 86° | 54° | 70° | — | — |
55 years of data from LONGMONT 2 ESE