Weather on August 18
Renton, WA
55 Years of Data
Avg High
78°F
Avg Low
56°F
Warmest
2022
79°F avg
Coldest
1973
54°F avg
About This Date
August 18th in Renton, WA typically brings pleasant summer weather, with average highs around 78°F and lows near 56°F. Over 55 years of records, the warmest August 18th was in 2022 (79°F average), while the coldest was 1973 (54°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 16% of August 18th dates historically, with the wettest August 18th recording 4.39" of rain. 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 August 18th in Renton, WA? Great weather for outdoor activities.
Warming Trend
1.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 75° | 61° | 68° | — | — |
| 2024 | 80° | 60° | 70° | — | — |
| 2023 | 76° | 60° | 68° | — | — |
| 2022warmest | 87° | 71° | 79° | — | — |
| 2021 | 78° | 54° | 66° | — | — |
| 2020 | 81° | 63° | 72° | — | — |
| 2019 | 77° | 61° | 69° | — | — |
| 2018 | 80° | 55° | 68° | — | — |
| 2017 | 75° | 58° | 66° | — | — |
| 2016 | 87° | 61° | 74° | — | — |
| 2015 | 84° | 58° | 71° | — | — |
| 2014 | 84° | 64° | 74° | — | — |
| 2013 | 79° | 62° | 70° | — | — |
| 2012 | 76° | 61° | 68° | — | — |
| 2011 | 74° | 53° | 63° | — | — |
| 2010 | 72° | 58° | 65° | — | — |
| 2009 | 85° | 59° | 72° | — | — |
| 2008 | 67° | 62° | 64° | 0.28" | — |
| 2007 | 74° | 55° | 64° | 0.56" | — |
| 2006 | 80° | 54° | 67° | — | — |
| 2005 | 79° | 56° | 67° | — | — |
| 2004 | 82° | 59° | 71° | — | — |
| 2003 | 83° | 60° | 71° | — | — |
| 2002 | 77° | 52° | 64° | — | — |
| 2001 | 71° | 59° | 65° | — | — |
| 2000 | 68° | 57° | 63° | 0.81" | — |
| 1999 | 78° | 63° | 70° | — | — |
| 1998 | 69° | 58° | 63° | — | — |
| 1997 | 88° | 61° | 74° | — | — |
| 1996 | 70° | 52° | 61° | — | — |
| 1995 | 70° | 50° | 60° | 0.03" | — |
| 1994 | 79° | 55° | 67° | — | — |
| 1993 | 78° | 58° | 68° | — | — |
| 1992 | 85° | 58° | 71° | — | — |
| 1991 | 86° | 61° | 73° | — | — |
| 1990 | 73° | 59° | 66° | 0.2" | — |
| 1989 | 82° | 56° | 69° | — | — |
| 1988 | 74° | 53° | 63° | — | — |
| 1987 | 78° | 46° | 62° | — | — |
| 1986 | 78° | 52° | 65° | — | — |
| 1985 | 87° | 51° | 69° | — | — |
| 1984 | 81° | 56° | 68° | — | — |
| 1983 | 78° | 51° | 65° | — | — |
| 1982 | 78° | 42° | 60° | — | — |
| 1981 | 89° | 47° | 68° | — | — |
| 1980 | 73° | 52° | 62° | 0.43" | — |
| 1979 | 75° | 56° | 65° | 0.38" | — |
| 1978 | 70° | 53° | 61° | 0.05" | — |
| 1977 | 97° | — | — | — | — |
| 1976 | 73° | 54° | 63° | — | — |
| 1975 | 74° | 54° | 64° | 4.39" | — |
| 1974 | 70° | 55° | 62° | — | — |
| 1973coldest | 69° | 40° | 54° | — | — |
| 1972 | 77° | 46° | 62° | — | — |
| 1971 | 82° | 49° | 65° | — | — |
55 years of data from RENTON MUNI AP