Weather on July 20
Boulder, CO
55 Years of Data
About This Date
July 20th in Boulder, CO typically brings warm summer weather, with average highs around 88°F and lows near 59°F — a 29°F daily swing. Over 55 years of records, the warmest July 20th was in 1998 (83°F average), while the coldest was 1973 (61°F) — a 22°F range across recorded history. Rain or other precipitation has occurred on about 45% of July 20th dates historically, with the wettest July 20th recording 5.38" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for July 20th in Boulder, 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° | 64° | 78° | — | — |
| 2024 | 86° | 59° | 73° | — | — |
| 2023 | 77° | 59° | 68° | — | — |
| 2022 | 93° | 68° | 81° | — | — |
| 2021 | 95° | 63° | 79° | — | — |
| 2020 | 91° | 61° | 76° | — | — |
| 2019 | 84° | 61° | 72° | — | — |
| 2018 | 97° | 64° | 80° | — | — |
| 2017 | 89° | 61° | 75° | — | — |
| 2016 | 95° | 61° | 78° | 0.05" | — |
| 2015 | 83° | 54° | 68° | — | — |
| 2014 | 94° | 63° | 78° | 0.3" | — |
| 2013 | 90° | 54° | 72° | — | — |
| 2012 | 96° | 61° | 78° | — | — |
| 2011 | 91° | 61° | 76° | 0.05" | — |
| 2010 | 86° | 61° | 73° | 0.05" | — |
| 2009 | 88° | 58° | 73° | 0.28" | — |
| 2008 | 98° | 60° | 79° | — | — |
| 2007 | 90° | 61° | 75° | — | — |
| 2006 | 84° | 65° | 74° | 1.19" | — |
| 2005 | 99° | 66° | 82° | — | — |
| 2004 | 86° | 62° | 74° | 0.2" | — |
| 2003 | 92° | 63° | 77° | — | — |
| 2002 | 96° | 62° | 79° | — | — |
| 2001 | 91° | 57° | 74° | — | — |
| 2000 | 85° | 56° | 70° | — | — |
| 1999 | 86° | 55° | 71° | 0.28" | — |
| 1998warmest | 100° | 66° | 83° | — | — |
| 1997 | 82° | 55° | 69° | 0.1" | — |
| 1996 | 92° | 60° | 76° | — | — |
| 1995 | 84° | 49° | 66° | 0.71" | — |
| 1994 | 74° | 56° | 65° | — | — |
| 1993 | 79° | 55° | 67° | 0.15" | — |
| 1992 | 77° | 52° | 64° | 0.81" | — |
| 1991 | 85° | 57° | 71° | 0.81" | — |
| 1990 | 72° | 55° | 63° | 5.38" | — |
| 1989 | 88° | 55° | 71° | — | — |
| 1988 | 80° | 48° | 64° | — | — |
| 1987 | 94° | 64° | 79° | — | — |
| 1986 | 75° | 56° | 65° | 2.01" | — |
| 1985 | 75° | 59° | 67° | 0.25" | — |
| 1984 | 92° | 63° | 77° | 0.03" | — |
| 1983 | 95° | 64° | 80° | 0.1" | — |
| 1982 | 96° | 62° | 79° | — | — |
| 1981 | 91° | 54° | 72° | — | — |
| 1980 | 95° | 58° | 76° | — | — |
| 1979 | 86° | 53° | 70° | 0.18" | — |
| 1978 | 85° | 58° | 71° | 0.84" | — |
| 1977 | 87° | 60° | 74° | 0.3" | — |
| 1976 | 76° | 60° | 68° | 0.38" | — |
| 1975 | 87° | 61° | 74° | 0.51" | — |
| 1974 | 91° | 61° | 76° | — | — |
| 1973coldest | 70° | 53° | 61° | 0.2" | — |
| 1972 | 91° | 56° | 73° | 0.13" | — |
| 1971 | 84° | 52° | 68° | — | — |
Boulder, CO Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Boulder, CO Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Boulder, 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 Boulder, CO
Boulder, CO has no months that meet our "pleasant" threshold — every season has tradeoffs.