Weather on March 18
Denver, CO
55 Years of Data
Avg High
57°F
Avg Low
28°F
Warmest
2026
61°F avg
Coldest
1971
27°F avg
About This Date
March 18th in Denver, CO typically brings cool spring weather, with average highs around 57°F and lows near 28°F — a 29°F daily swing. Over 56 years of records, the warmest March 18th was in 2026 (61°F average), while the coldest was 1971 (27°F) — a 34°F range across recorded history. Precipitation has occurred on 18% of recorded March 18th dates, with snow falling 16% of the time (heaviest snowfall: 10"). The last decade has been 3.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.1°F warmer on this date compared to 20-30 years ago.
Planning for March 18th in Denver, CO? Bring layers as temperatures can vary throughout the day.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 78° | 45° | 61° | — | — |
| 2025 | 74° | 40° | 57° | — | — |
| 2024 | 49° | 24° | 36° | — | — |
| 2023 | 45° | 16° | 30° | — | — |
| 2022 | 37° | 21° | 29° | 0.03" | 0.1" |
| 2021 | 43° | 21° | 32° | — | — |
| 2020 | 60° | 30° | 45° | — | — |
| 2019 | 52° | 28° | 40° | — | — |
| 2018 | 65° | 27° | 46° | — | — |
| 2017 | 71° | 34° | 52° | — | — |
| 2016 | 50° | 21° | 36° | 1.57" | 6.2" |
| 2015 | 60° | 37° | 49° | — | — |
| 2014 | 73° | 29° | 51° | — | — |
| 2013 | 62° | 31° | 46° | — | — |
| 2012 | 73° | 39° | 56° | — | — |
| 2011 | 60° | 28° | 44° | — | — |
| 2010 | 71° | 31° | 51° | — | — |
| 2009 | 77° | 40° | 58° | — | — |
| 2008 | 40° | 23° | 31° | — | — |
| 2007 | 80° | 34° | 57° | — | — |
| 2006 | 51° | 22° | 36° | — | — |
| 2005 | 60° | 31° | 45° | — | — |
| 2004 | 71° | 35° | 53° | — | — |
| 2003 | 33° | 31° | 32° | 3.05" | 7" |
| 2002 | 49° | 24° | 36° | — | — |
| 2001 | 55° | 23° | 39° | — | — |
| 2000 | 48° | 29° | 38° | — | — |
| 1999 | 54° | 24° | 39° | — | — |
| 1998 | 37° | 25° | 31° | 3" | 10" |
| 1997 | 64° | 33° | 49° | — | — |
| 1996 | 39° | 19° | 29° | — | — |
| 1995 | 73° | 33° | 53° | — | — |
| 1994 | 73° | 31° | 52° | — | — |
| 1993 | 63° | 28° | 45° | — | — |
| 1992 | 50° | 31° | 40° | 0.61" | 1" |
| 1991 | 66° | 26° | 46° | — | — |
| 1990 | 42° | 29° | 35° | 0.13" | — |
| 1989 | 63° | 22° | 42° | — | — |
| 1988 | 47° | 13° | 30° | — | — |
| 1987 | 57° | 27° | 42° | — | — |
| 1986 | 39° | 24° | 32° | — | — |
| 1985 | 62° | 36° | 49° | — | — |
| 1984 | 58° | 27° | 42° | 0.25" | 1" |
| 1983 | 31° | 24° | 27° | — | — |
| 1982 | 58° | 29° | 43° | — | — |
| 1981 | 45° | 25° | 35° | 0.43" | 1.7" |
| 1980 | 66° | 22° | 44° | — | — |
| 1979 | 55° | 32° | 44° | 0.2" | 0.8" |
| 1978 | 71° | 35° | 53° | — | — |
| 1977 | 44° | 23° | 34° | — | — |
| 1976 | 69° | 37° | 53° | — | — |
| 1975 | 61° | 26° | 43° | — | — |
| 1974 | 68° | 37° | 53° | — | — |
| 1973 | 59° | 30° | 45° | 1.45" | 2.2" |
| 1972 | 75° | 35° | 55° | — | — |
| 1971coldest | 38° | 17° | 27° | — | — |
56 years of data from NORTHGLENN