Weather on August 18
Greeley, CO
55 Years of Data
Avg High
88°F
Avg Low
57°F
Warmest
2020
81°F avg
Coldest
1978
62°F avg
About This Date
August 18th in Greeley, CO typically brings warm summer weather, with average highs around 88°F and lows near 57°F — a 31°F daily swing. Over 55 years of records, the warmest August 18th was in 2020 (81°F average), while the coldest was 1978 (62°F) — a 19°F range across recorded history. Rain or other precipitation has occurred on about 18% of August 18th dates historically, with the wettest August 18th recording 2.87" of rain. The last decade has been 3.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.3°F warmer on this date compared to 20-30 years ago.
Planning for August 18th in Greeley, CO? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 94° | 60° | 77° | — | — |
| 2024 | 96° | 63° | 79° | — | — |
| 2023 | 98° | 63° | 80° | — | — |
| 2022 | 90° | 55° | 72° | — | — |
| 2021 | 97° | 58° | 77° | — | — |
| 2020warmest | 102° | 61° | 81° | — | — |
| 2019 | 86° | 56° | 71° | — | — |
| 2018 | 80° | 52° | 66° | — | — |
| 2017 | 88° | 55° | 71° | — | — |
| 2016 | 92° | 55° | 73° | — | — |
| 2015 | 76° | 49° | 62° | 0.58" | — |
| 2014 | 91° | 58° | 74° | — | — |
| 2013 | 94° | 60° | 77° | — | — |
| 2012 | 85° | 59° | 72° | — | — |
| 2011 | 97° | 57° | 77° | — | — |
| 2010 | 101° | 57° | 79° | — | — |
| 2009 | 81° | 52° | 66° | — | — |
| 2008 | 77° | 51° | 64° | — | — |
| 2007 | 90° | 58° | 74° | 0.05" | — |
| 2006 | 88° | 62° | 75° | — | — |
| 2005 | 90° | 52° | 71° | — | — |
| 2004 | 80° | 59° | 70° | — | — |
| 2003 | 85° | 59° | 72° | 0.51" | — |
| 2002 | 89° | 47° | 68° | — | — |
| 2001 | 91° | 51° | 71° | — | — |
| 2000 | 80° | 58° | 69° | — | — |
| 1999 | 87° | 54° | 70° | — | — |
| 1998 | 95° | 60° | 78° | — | — |
| 1997 | 83° | 59° | 71° | 0.33" | — |
| 1996 | 92° | 57° | 74° | 0.05" | — |
| 1995 | 96° | 61° | 78° | — | — |
| 1994 | 86° | 59° | 73° | — | — |
| 1993 | 86° | 63° | 74° | 0.38" | — |
| 1992 | 80° | 51° | 66° | — | — |
| 1991 | 85° | 57° | 71° | — | — |
| 1990 | 84° | 55° | 70° | — | — |
| 1989 | 87° | 55° | 71° | — | — |
| 1988 | 84° | 56° | 70° | — | — |
| 1987 | 80° | 52° | 66° | — | — |
| 1986 | 99° | 59° | 79° | — | — |
| 1985 | 76° | 54° | 65° | 0.05" | — |
| 1984 | 85° | 61° | 73° | — | — |
| 1983 | 94° | 62° | 78° | — | — |
| 1982 | 93° | 61° | 77° | — | — |
| 1981 | 83° | 54° | 68° | — | — |
| 1980 | 94° | 51° | 72° | — | — |
| 1979 | 74° | 56° | 65° | 2.87" | — |
| 1978coldest | 71° | 54° | 62° | — | — |
| 1977 | 80° | 62° | 71° | 0.94" | — |
| 1976 | 93° | 56° | 74° | 0.05" | — |
| 1975 | 92° | 54° | 73° | — | — |
| 1974 | 93° | 57° | 75° | — | — |
| 1973 | 92° | 61° | 76° | — | — |
| 1972 | 91° | 57° | 74° | — | — |
| 1971 | 90° | 61° | 75° | — | — |
55 years of data from GREELEY UNC