Weather on April 17
Longmont, CO
55 Years of Data
About This Date
April 17th in Longmont, CO typically brings mild spring weather, with average highs around 63°F and lows near 34°F — a 29°F daily swing. Over 56 years of records, the warmest April 17th was in 1985 (64°F average), while the coldest was 2020 (20°F) — a 44°F range across recorded history. Precipitation has occurred on 25% of recorded April 17th dates, with snow falling 11% of the time (heaviest snowfall: 11.8"). 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 April 17th in Longmont, CO? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 79° | 35° | 57° | — | — |
| 2025 | 79° | 47° | 63° | — | — |
| 2024 | 70° | 47° | 58° | — | — |
| 2023 | 67° | 33° | 50° | — | — |
| 2022 | 58° | 27° | 42° | — | — |
| 2021 | 39° | 28° | 34° | — | — |
| 2020coldest | 30° | 11° | 20° | 0.71" | 1.3" |
| 2019 | 66° | 41° | 54° | — | — |
| 2018 | 67° | 37° | 52° | — | — |
| 2017 | 76° | 36° | 56° | — | — |
| 2016 | 39° | 30° | 35° | 1.8" | 11.8" |
| 2015 | 49° | 32° | 40° | 4.98" | 0.6" |
| 2014 | 64° | 30° | 47° | — | — |
| 2013 | 33° | 22° | 27° | 1.19" | 5.5" |
| 2012 | 69° | 37° | 53° | — | — |
| 2011 | 69° | 39° | 54° | — | — |
| 2010 | 54° | 41° | 47° | 0.1" | — |
| 2009 | 39° | 32° | 36° | 6.58" | 5.2" |
| 2008 | 50° | 28° | 39° | 0.38" | 1.8" |
| 2007 | 56° | 40° | 48° | 0.74" | — |
| 2006 | 82° | 46° | 64° | — | — |
| 2005 | 72° | 43° | 57° | — | — |
| 2004 | 76° | 39° | 57° | — | — |
| 2003 | 65° | 38° | 51° | — | — |
| 2002 | 66° | 31° | 48° | — | — |
| 2001 | 67° | 35° | 51° | — | — |
| 2000 | 65° | 28° | 46° | — | — |
| 1999 | 42° | 14° | 28° | — | — |
| 1998 | 42° | 22° | 32° | — | — |
| 1997 | 67° | 25° | 46° | — | — |
| 1996 | 77° | 38° | 57° | — | — |
| 1995 | 53° | 34° | 43° | 0.13" | — |
| 1994 | 81° | 37° | 59° | — | — |
| 1993 | 59° | 30° | 45° | 0.03" | — |
| 1992 | 53° | 34° | 43° | 1.07" | — |
| 1991 | 55° | 32° | 44° | — | — |
| 1990 | 55° | 31° | 43° | 0.1" | — |
| 1989 | 74° | 30° | 52° | — | — |
| 1988 | 72° | 42° | 57° | — | — |
| 1987 | 82° | 38° | 60° | — | — |
| 1986 | 51° | 37° | 44° | 0.48" | — |
| 1985warmest | 79° | 49° | 64° | — | — |
| 1984 | 70° | 32° | 51° | — | — |
| 1983 | 60° | 28° | 44° | — | — |
| 1982 | 52° | 23° | 37° | — | — |
| 1981 | 77° | 43° | 60° | — | — |
| 1980 | 61° | 25° | 43° | — | — |
| 1979 | 79° | 45° | 62° | — | — |
| 1978 | 62° | 37° | 50° | — | — |
| 1977 | 65° | 41° | 53° | — | — |
| 1976 | 68° | 39° | 54° | 0.03" | — |
| 1975 | 75° | 36° | 55° | — | — |
| 1974 | 62° | 32° | 47° | — | — |
| 1973 | 61° | 33° | 47° | — | — |
| 1972 | 74° | 35° | 54° | — | — |
| 1971 | 72° | 35° | 53° | — | — |
Longmont, CO Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Longmont, CO Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Longmont, 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 Longmont, CO
Longmont, CO has no months that meet our "pleasant" threshold — every season has tradeoffs.