Weather on September 6
Boulder, CO
55 Years of Data
About This Date
September 6th in Boulder, CO typically brings warm fall weather, with average highs around 84°F and lows near 53°F — a 31°F daily swing. Over 55 years of records, the warmest September 6th was in 2020 (82°F average), while the coldest was 2008 (55°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 18% of September 6th dates historically, with the wettest September 6th recording 0.84" 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 September 6th in Boulder, CO? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 79° | 45° | 62° | — | — |
| 2024 | 82° | 52° | 67° | — | — |
| 2023 | 86° | 48° | 67° | — | — |
| 2022 | 97° | 63° | 80° | — | — |
| 2021 | 95° | 55° | 75° | — | — |
| 2020warmest | 97° | 68° | 82° | — | — |
| 2019 | 81° | 61° | 71° | — | — |
| 2018 | 70° | 52° | 61° | — | — |
| 2017 | 80° | 45° | 62° | — | — |
| 2016 | 82° | 57° | 70° | — | — |
| 2015 | 88° | 57° | 72° | — | — |
| 2014 | 72° | 47° | 59° | — | — |
| 2013 | 95° | 61° | 78° | — | — |
| 2012 | 92° | 56° | 74° | — | — |
| 2011 | 84° | 57° | 71° | 0.08" | — |
| 2010 | 84° | 55° | 70° | — | — |
| 2009 | 80° | 51° | 66° | 0.03" | — |
| 2008coldest | 68° | 43° | 55° | — | — |
| 2007 | 85° | 56° | 70° | 0.03" | — |
| 2006 | 81° | 51° | 66° | — | — |
| 2005 | 81° | 56° | 68° | — | — |
| 2004 | 78° | 44° | 61° | — | — |
| 2003 | 79° | 60° | 69° | — | — |
| 2002 | 92° | 58° | 75° | — | — |
| 2001 | 85° | 55° | 70° | 0.03" | — |
| 2000 | 91° | 55° | 73° | — | — |
| 1999 | 85° | 46° | 65° | — | — |
| 1998 | 93° | 60° | 77° | — | — |
| 1997 | 84° | 56° | 70° | 0.58" | — |
| 1996 | 75° | 52° | 63° | 0.84" | — |
| 1995 | 81° | 60° | 70° | 0.13" | — |
| 1994 | 87° | 47° | 67° | — | — |
| 1993 | 71° | 48° | 60° | 0.1" | — |
| 1992 | 79° | 47° | 63° | — | — |
| 1991 | 77° | 55° | 66° | — | — |
| 1990 | 80° | 60° | 70° | 0.2" | — |
| 1989 | 91° | 50° | 71° | — | — |
| 1988 | 90° | 52° | 71° | — | — |
| 1987 | 79° | 47° | 63° | — | — |
| 1986 | 74° | 46° | 60° | 0.43" | — |
| 1985 | 87° | 66° | 77° | — | — |
| 1984 | 92° | 59° | 75° | — | — |
| 1983 | 82° | 49° | 65° | — | — |
| 1982 | 76° | 48° | 62° | — | — |
| 1981 | 72° | 57° | 64° | — | — |
| 1980 | 91° | 55° | 73° | — | — |
| 1979 | 82° | 43° | 62° | — | — |
| 1978 | 93° | 56° | 74° | — | — |
| 1977 | 91° | 58° | 74° | — | — |
| 1976 | 90° | 55° | 72° | — | — |
| 1975 | 87° | 50° | 69° | — | — |
| 1974 | 82° | 49° | 65° | — | — |
| 1973 | 83° | 47° | 65° | — | — |
| 1972 | 79° | 57° | 68° | — | — |
| 1971 | 87° | 53° | 70° | — | — |
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
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