Weather on December 30
Longmont, CO
55 Years of Data
Avg High
42°F
Avg Low
14°F
Warmest
2011
49°F avg
Coldest
1990
-5°F avg
About This Date
December 30th in Longmont, CO typically brings chilly winter weather, with average highs around 42°F and lows near 14°F — a 28°F daily swing. Over 55 years of records, the warmest December 30th was in 2011 (49°F average), while the coldest was 1990 (-5°F) — a 54°F range across recorded history. Precipitation has occurred on 11% of recorded December 30th dates, with snow falling 9% of the time (heaviest snowfall: 6.2"). The last decade has been 6.5°F cooler on this date compared to 20-30 years ago.
The last decade has been 6.5°F cooler on this date compared to 20-30 years ago.
Planning for December 30th in Longmont, CO? Bring layers as temperatures can vary throughout the day.
Warming Trend
1.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 42° | 13° | 27° | — | — |
| 2024 | 56° | 29° | 42° | — | — |
| 2023 | 58° | 21° | 39° | — | — |
| 2022 | 35° | 12° | 24° | — | — |
| 2021 | 37° | 14° | 26° | — | — |
| 2020 | 37° | 7° | 22° | — | — |
| 2019 | 35° | 9° | 22° | — | — |
| 2018 | 37° | 6° | 22° | — | — |
| 2017 | 63° | 10° | 36° | 0.03" | — |
| 2016 | 67° | 24° | 45° | — | — |
| 2015 | 30° | 7° | 18° | — | — |
| 2014 | 8° | -6° | 1° | 0.33" | 2" |
| 2013 | 50° | 22° | 36° | — | — |
| 2012 | 40° | 14° | 27° | — | — |
| 2011warmest | 61° | 38° | 49° | — | — |
| 2010 | 45° | 13° | 29° | 0.71" | 6.2" |
| 2009 | 36° | 19° | 27° | — | — |
| 2008 | 56° | 36° | 46° | — | — |
| 2007 | 41° | 20° | 30° | — | — |
| 2006 | 37° | 13° | 25° | — | — |
| 2005 | 48° | 23° | 36° | — | — |
| 2004 | 50° | 34° | 42° | — | — |
| 2003 | 46° | 21° | 34° | — | — |
| 2002 | 61° | 24° | 42° | — | — |
| 2001 | 35° | 14° | 25° | — | — |
| 2000 | 40° | 9° | 24° | — | — |
| 1999 | 62° | 18° | 40° | — | — |
| 1998 | 55° | 23° | 39° | — | — |
| 1997 | 58° | 24° | 41° | — | — |
| 1996 | 64° | 30° | 47° | — | — |
| 1995 | 48° | 12° | 30° | — | — |
| 1994 | 44° | 23° | 34° | 0.23" | — |
| 1993 | 49° | 12° | 30° | — | — |
| 1992 | 33° | 15° | 24° | — | — |
| 1991 | 52° | 13° | 32° | — | — |
| 1990coldest | -1° | -10° | -5° | — | — |
| 1989 | 34° | 8° | 21° | — | — |
| 1988 | 29° | -5° | 12° | — | — |
| 1987 | 38° | -2° | 18° | — | — |
| 1986 | 54° | 17° | 35° | — | — |
| 1985 | 52° | 21° | 36° | — | — |
| 1984 | 47° | 18° | 32° | — | — |
| 1983 | 14° | -16° | -1° | — | — |
| 1982 | 24° | -5° | 10° | — | — |
| 1981 | 25° | 3° | 14° | — | — |
| 1980 | 57° | 26° | 42° | — | — |
| 1979 | 36° | 8° | 22° | — | — |
| 1978 | 9° | -5° | 2° | — | — |
| 1977 | 42° | 16° | 29° | — | — |
| 1976 | 56° | 20° | 38° | — | 0.3" |
| 1975 | 44° | 18° | 31° | — | — |
| 1974 | 34° | 8° | 21° | — | — |
| 1973 | 34° | 18° | 26° | 0.05" | 0.5" |
| 1972 | 29° | 9° | 19° | 0.25" | 2" |
| 1971 | 44° | 16° | 30° | — | — |
55 years of data from LONGMONT 2 ESE