Weather on August 18
Denver, CO
55 Years of Data
About This Date
August 18th in Denver, CO typically brings warm summer weather, with average highs around 86°F and lows near 58°F — a 28°F daily swing. Over 55 years of records, the warmest August 18th was in 1986 (80°F average), while the coldest was 1978 (59°F) — a 21°F range across recorded history. Rain or other precipitation has occurred on about 31% of August 18th dates historically, with the wettest August 18th recording 4.52" of rain. The last decade has been 4.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.6°F warmer on this date compared to 20-30 years ago.
Planning for August 18th in Denver, CO? Stay hydrated and seek shade during peak afternoon hours. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 91° | 58° | 74° | — | — |
| 2024 | 97° | 63° | 80° | — | — |
| 2023 | 94° | 66° | 80° | — | — |
| 2022 | 82° | 55° | 69° | — | — |
| 2021 | 95° | 60° | 78° | — | — |
| 2020 | 96° | 63° | 79° | — | — |
| 2019 | 92° | 56° | 74° | — | — |
| 2018 | 88° | 60° | 74° | — | — |
| 2017 | 88° | 54° | 71° | — | — |
| 2016 | 91° | 59° | 75° | — | — |
| 2015 | 77° | 50° | 64° | 0.05" | — |
| 2014 | 92° | 57° | 74° | 0.08" | — |
| 2013 | 94° | 59° | 76° | — | — |
| 2012 | 86° | 50° | 68° | — | — |
| 2011 | 92° | 57° | 74° | — | — |
| 2010 | 89° | 52° | 70° | — | — |
| 2009 | 73° | 48° | 61° | 0.1" | — |
| 2008 | 67° | 51° | 59° | — | — |
| 2007 | 83° | 58° | 70° | 0.41" | — |
| 2006 | 87° | 61° | 74° | — | — |
| 2005 | 88° | 54° | 71° | — | — |
| 2004 | 90° | 55° | 72° | — | — |
| 2003 | 85° | 60° | 72° | — | — |
| 2002 | 86° | 54° | 70° | — | — |
| 2001 | 82° | 53° | 68° | — | — |
| 2000 | 78° | 57° | 68° | 4.52" | — |
| 1999 | 84° | 54° | 69° | 0.76" | — |
| 1998 | 91° | 62° | 77° | 0.28" | — |
| 1997 | 81° | 58° | 69° | 0.23" | — |
| 1996 | 88° | 57° | 72° | 0.03" | — |
| 1995 | 93° | 63° | 78° | 0.2" | — |
| 1994 | 90° | 61° | 75° | — | — |
| 1993 | 83° | 64° | 73° | 0.03" | — |
| 1992 | 80° | 52° | 66° | — | — |
| 1991 | 84° | 55° | 70° | — | — |
| 1990 | 81° | 54° | 67° | 0.05" | — |
| 1989 | 86° | 62° | 74° | — | — |
| 1988 | 82° | 58° | 70° | — | — |
| 1987 | 82° | 51° | 67° | — | — |
| 1986warmest | 98° | 62° | 80° | 0.15" | — |
| 1985 | 80° | 55° | 68° | — | — |
| 1984 | 80° | 62° | 71° | 0.64" | — |
| 1983 | 90° | 62° | 76° | — | — |
| 1982 | 91° | 63° | 77° | — | — |
| 1981 | 86° | 57° | 72° | — | — |
| 1980 | 92° | 62° | 77° | — | — |
| 1979 | 76° | 56° | 66° | 2.11" | — |
| 1978coldest | 65° | 53° | 59° | — | — |
| 1977 | 80° | 63° | 71° | 0.08" | — |
| 1976 | 87° | 58° | 72° | — | — |
| 1975 | 88° | 55° | 71° | — | — |
| 1974 | 93° | 58° | 75° | — | — |
| 1973 | 91° | 61° | 76° | — | — |
| 1972 | 89° | 56° | 72° | — | — |
| 1971 | 89° | 63° | 76° | 1.47" | — |
Denver, CO Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Denver, CO Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Denver, 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 Denver, CO
Denver, CO has no months that meet our "pleasant" threshold — every season has tradeoffs.