Weather on May 18
Greeley, CO
55 Years of Data
Avg High
78°F
Avg Low
46°F
Warmest
1996
73°F avg
Coldest
1981
42°F avg
About This Date
May 18th in Greeley, CO typically brings pleasant spring weather, with average highs around 78°F and lows near 46°F — a 32°F daily swing. Over 55 years of records, the warmest May 18th was in 1996 (73°F average), while the coldest was 1981 (42°F) — a 31°F range across recorded history. Rain or other precipitation has occurred on about 42% of May 18th dates historically, with the wettest May 18th recording 8.33" of rain. The last decade has been 2.0°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.0°F cooler on this date compared to 20-30 years ago.
Planning for May 18th in Greeley, CO? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 67° | 51° | 59° | — | — |
| 2024 | 83° | 46° | 64° | — | — |
| 2023 | 77° | 51° | 64° | 0.1" | — |
| 2022 | 86° | 55° | 71° | — | — |
| 2021 | 66° | 48° | 57° | 0.05" | — |
| 2020 | 89° | 48° | 69° | — | — |
| 2019 | 64° | 37° | 51° | 0.13" | — |
| 2018 | 86° | 55° | 71° | — | — |
| 2017 | 67° | 33° | 50° | 8.33" | — |
| 2016 | 68° | 40° | 54° | — | — |
| 2015 | 70° | 43° | 56° | 0.03" | — |
| 2014 | 86° | 43° | 64° | — | — |
| 2013 | 87° | 55° | 71° | — | — |
| 2012 | 87° | 48° | 68° | — | — |
| 2011 | 59° | 38° | 48° | 0.2" | — |
| 2010 | 79° | 39° | 59° | — | — |
| 2009 | 94° | 48° | 71° | — | — |
| 2008 | 95° | 45° | 70° | — | — |
| 2007 | 88° | 45° | 66° | 0.03" | — |
| 2006 | 94° | 48° | 71° | — | — |
| 2005 | 80° | 43° | 61° | — | — |
| 2004 | 76° | 56° | 66° | — | — |
| 2003 | 80° | 52° | 66° | — | — |
| 2002 | 76° | 43° | 59° | 0.46" | — |
| 2001 | 78° | 43° | 60° | — | — |
| 2000 | 57° | 41° | 49° | — | — |
| 1999 | 79° | 39° | 59° | — | — |
| 1998 | 87° | 49° | 68° | — | — |
| 1997 | 82° | 56° | 69° | 0.15" | — |
| 1996warmest | 93° | 53° | 73° | — | — |
| 1995 | 68° | 37° | 53° | 0.94" | — |
| 1994 | 86° | 50° | 68° | — | — |
| 1993 | 73° | 41° | 57° | 0.03" | — |
| 1992 | 90° | 46° | 68° | — | — |
| 1991 | 79° | 52° | 65° | — | — |
| 1990 | 82° | 40° | 61° | — | — |
| 1989 | 80° | 49° | 64° | — | — |
| 1988 | 76° | 56° | 66° | 2.03" | — |
| 1987 | 79° | 47° | 63° | 0.41" | — |
| 1986 | 72° | 41° | 56° | — | — |
| 1985 | 73° | 43° | 58° | 0.23" | — |
| 1984 | 79° | 46° | 62° | 0.13" | — |
| 1983 | 62° | 35° | 49° | 0.25" | — |
| 1982 | 81° | 43° | 62° | — | — |
| 1981coldest | 45° | 40° | 42° | 0.76" | — |
| 1980 | 63° | 42° | 52° | 0.05" | — |
| 1979 | 79° | 48° | 63° | 0.1" | — |
| 1978 | 67° | 40° | 53° | 1.88" | — |
| 1977 | 81° | 45° | 63° | — | — |
| 1976 | 87° | 40° | 63° | — | — |
| 1975 | 78° | 51° | 65° | 1.3" | — |
| 1974 | 78° | 52° | 65° | 0.08" | — |
| 1973 | 87° | 50° | 69° | — | — |
| 1972 | 84° | 45° | 64° | — | — |
| 1971 | 54° | 37° | 45° | 0.13" | — |
55 years of data from GREELEY UNC