Weather on March 20
Boulder, CO
55 Years of Data
About This Date
March 20th in Boulder, CO typically brings cool spring weather, with average highs around 57°F and lows near 31°F — a 26°F daily swing. Over 56 years of records, the warmest March 20th was in 2026 (70°F average), while the coldest was 2010 (22°F) — a 48°F range across recorded history. Precipitation has occurred on 18% of recorded March 20th dates, with snow falling 16% of the time (heaviest snowfall: 6.5"). 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 March 20th in Boulder, CO? Bring layers as temperatures can vary throughout the day.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 86° | 54° | 70° | — | — |
| 2025 | 59° | 34° | 46° | — | — |
| 2024 | 59° | 36° | 47° | — | — |
| 2023 | 55° | 34° | 44° | — | — |
| 2022 | 64° | 34° | 49° | — | — |
| 2021 | 59° | 32° | 46° | — | — |
| 2020 | 28° | 21° | 25° | — | — |
| 2019 | 59° | 27° | 43° | — | — |
| 2018 | 52° | 30° | 41° | — | — |
| 2017 | 77° | 52° | 64° | — | — |
| 2016 | 54° | 14° | 34° | — | — |
| 2015 | 65° | 30° | 47° | — | — |
| 2014 | 66° | 35° | 51° | — | — |
| 2013 | 53° | 19° | 36° | — | — |
| 2012 | 52° | 26° | 39° | — | — |
| 2011 | 66° | 39° | 53° | — | — |
| 2010coldest | 37° | 6° | 22° | 0.13" | 2.4" |
| 2009 | 65° | 42° | 53° | — | — |
| 2008 | 65° | 31° | 48° | — | — |
| 2007 | 76° | 39° | 57° | — | — |
| 2006 | 35° | 19° | 27° | 1.17" | 5.5" |
| 2005 | 57° | 33° | 45° | — | — |
| 2004 | 74° | 38° | 56° | — | — |
| 2003 | 47° | 26° | 36° | — | — |
| 2002 | 65° | 36° | 50° | — | — |
| 2001 | 67° | 38° | 52° | — | — |
| 2000 | 51° | 27° | 39° | 0.25" | 1" |
| 1999 | 66° | 33° | 50° | — | — |
| 1998 | 46° | 16° | 31° | — | — |
| 1997 | 80° | 47° | 63° | — | — |
| 1996 | 59° | 18° | 38° | — | — |
| 1995 | 61° | 29° | 45° | — | — |
| 1994 | 55° | 31° | 43° | 0.13" | 0.4" |
| 1993 | 53° | 31° | 42° | — | — |
| 1992 | 58° | 29° | 43° | — | — |
| 1991 | 56° | 46° | 51° | — | — |
| 1990 | 61° | 29° | 45° | — | — |
| 1989 | 54° | 21° | 37° | 1.22" | 6.5" |
| 1988 | 69° | 39° | 54° | — | — |
| 1987 | 54° | 35° | 44° | 0.05" | — |
| 1986 | 53° | 26° | 40° | 0.36" | 1.5" |
| 1985 | 61° | 32° | 46° | — | — |
| 1984 | 61° | 29° | 45° | — | — |
| 1983 | 31° | 17° | 24° | 0.23" | 2.5" |
| 1982 | 56° | 27° | 41° | — | — |
| 1981 | 49° | 26° | 37° | — | — |
| 1980 | 55° | 24° | 40° | 0.25" | 1" |
| 1979 | 37° | 30° | 34° | — | — |
| 1978 | 64° | 45° | 54° | — | — |
| 1977 | 44° | 27° | 35° | — | — |
| 1976 | 44° | 27° | 35° | — | — |
| 1975 | 69° | 49° | 59° | — | — |
| 1974 | 52° | 20° | 36° | 0.28" | 4.4" |
| 1973 | 54° | 26° | 40° | — | — |
| 1972 | 57° | 36° | 46° | — | — |
| 1971 | 65° | 30° | 47° | — | — |
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.