Weather on March 20
Boulder, CO
55 Years of Data
Avg High
57°F
Avg Low
31°F
Warmest
2026
70°F avg
Coldest
2010
22°F avg
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.
Warming Trend
1.0°F per decade on this date
| 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° | — | — |
56 years of data from BOULDER MUNI AP