Weather on September 7
Boulder, CO
55 Years of Data
About This Date
September 7th in Boulder, CO typically brings warm fall weather, with average highs around 81°F and lows near 53°F — a 28°F daily swing. Over 55 years of records, the warmest September 7th was in 2022 (79°F average), while the coldest was 1986 (49°F) — a 30°F range across recorded history. Rain or other precipitation has occurred on about 29% of September 7th dates historically, with the wettest September 7th recording 2.59" of rain. The last decade has been 4.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.2°F warmer on this date compared to 20-30 years ago.
Planning for September 7th in Boulder, CO? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 86° | 57° | 72° | — | — |
| 2024 | 86° | 55° | 71° | — | — |
| 2023 | 91° | 55° | 73° | — | — |
| 2022warmest | 95° | 63° | 79° | — | — |
| 2021 | 84° | 55° | 70° | — | — |
| 2020 | 70° | 61° | 65° | — | — |
| 2019 | 90° | 63° | 76° | — | — |
| 2018 | 73° | 52° | 62° | — | — |
| 2017 | 85° | 48° | 66° | — | — |
| 2016 | 84° | 51° | 68° | — | — |
| 2015 | 81° | 53° | 67° | 0.05" | — |
| 2014 | 83° | 49° | 66° | — | — |
| 2013 | 93° | 60° | 77° | — | — |
| 2012 | 86° | 52° | 69° | 0.3" | — |
| 2011 | 66° | 52° | 59° | 2.59" | — |
| 2010 | 79° | 39° | 59° | — | — |
| 2009 | 89° | 54° | 71° | — | — |
| 2008 | 74° | 43° | 58° | — | — |
| 2007 | 80° | 49° | 64° | — | — |
| 2006 | 80° | 50° | 65° | 0.13" | — |
| 2005 | 87° | 53° | 70° | — | — |
| 2004 | 83° | 46° | 64° | — | — |
| 2003 | 71° | 57° | 64° | 0.03" | — |
| 2002 | 89° | 60° | 75° | — | — |
| 2001 | 70° | 46° | 58° | 0.58" | — |
| 2000 | 80° | 45° | 62° | — | — |
| 1999 | 83° | 54° | 68° | — | — |
| 1998 | 88° | 55° | 71° | — | — |
| 1997 | 83° | 54° | 68° | — | — |
| 1996 | 76° | 45° | 60° | — | — |
| 1995 | 68° | 47° | 57° | 0.36" | — |
| 1994 | 83° | 59° | 71° | 0.03" | — |
| 1993 | 69° | 48° | 59° | 0.69" | — |
| 1992 | 73° | 47° | 60° | — | — |
| 1991 | 83° | 56° | 69° | 0.2" | — |
| 1990 | 82° | 57° | 70° | — | — |
| 1989 | 86° | 55° | 71° | — | — |
| 1988 | 93° | 56° | 74° | — | — |
| 1987 | 71° | 48° | 60° | 0.28" | — |
| 1986coldest | 53° | 44° | 49° | 0.94" | — |
| 1985 | 82° | 52° | 67° | — | — |
| 1984 | 81° | 58° | 69° | 0.05" | — |
| 1983 | 93° | 48° | 71° | — | — |
| 1982 | 79° | 51° | 65° | — | — |
| 1981 | 64° | 54° | 59° | 0.79" | — |
| 1980 | 88° | 56° | 72° | — | — |
| 1979 | 77° | 45° | 61° | — | — |
| 1978 | 90° | 54° | 72° | — | — |
| 1977 | 91° | 59° | 75° | — | — |
| 1976 | 86° | 55° | 71° | 0.28" | — |
| 1975 | 86° | 54° | 70° | — | — |
| 1974 | 87° | 51° | 69° | — | — |
| 1973 | 84° | 50° | 67° | — | — |
| 1972 | 73° | 54° | 63° | 0.13" | — |
| 1971 | 89° | 58° | 73° | — | — |
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.