Weather on April 18
Seattle, WA
55 Years of Data
Avg High
60°F
Avg Low
44°F
Warmest
2016
70°F avg
Coldest
2008
42°F avg
About This Date
April 18th in Seattle, WA typically brings mild spring weather, with average highs around 60°F and lows near 44°F. Over 55 years of records, the warmest April 18th was in 2016 (70°F average), while the coldest was 2008 (42°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 49% of April 18th dates historically, with the wettest April 18th recording 0.74" 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 April 18th in Seattle, WA? 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 | 73° | 41° | 57° | — | — |
| 2024 | 64° | 36° | 50° | — | — |
| 2023 | 49° | 38° | 43° | 0.08" | — |
| 2022 | 51° | 42° | 47° | 0.51" | — |
| 2021 | 80° | 46° | 63° | — | — |
| 2020 | 58° | 48° | 53° | 0.03" | — |
| 2019 | 64° | 53° | 59° | 0.25" | — |
| 2018 | 58° | 43° | 50° | — | — |
| 2017 | 61° | 47° | 54° | 0.56" | — |
| 2016warmest | 89° | 52° | 70° | — | — |
| 2015 | 68° | 48° | 58° | — | — |
| 2014 | 60° | 44° | 52° | — | — |
| 2013 | 53° | 45° | 49° | 0.51" | — |
| 2012 | 57° | 45° | 51° | 0.2" | — |
| 2011 | 54° | 37° | 45° | 0.08" | — |
| 2010 | 71° | 46° | 59° | 0.03" | — |
| 2009 | 59° | 37° | 48° | — | — |
| 2008coldest | 49° | 36° | 42° | 0.08" | — |
| 2007 | 53° | 43° | 48° | 0.2" | — |
| 2006 | 59° | 38° | 48° | — | — |
| 2005 | 58° | 45° | 51° | — | — |
| 2004 | 58° | 46° | 52° | — | — |
| 2003 | 57° | 43° | 50° | 0.1" | — |
| 2002 | 60° | 41° | 51° | — | — |
| 2001 | 59° | 43° | 51° | 0.13" | — |
| 2000 | 65° | 44° | 54° | — | — |
| 1999 | 60° | 49° | 54° | — | — |
| 1998 | 59° | 47° | 53° | 0.1" | — |
| 1997 | 55° | 46° | 51° | — | — |
| 1996 | 54° | 42° | 48° | 0.2" | — |
| 1995 | 56° | 41° | 48° | 0.41" | — |
| 1994 | 67° | 51° | 59° | — | — |
| 1993 | 58° | 45° | 51° | 0.08" | — |
| 1992 | 61° | 45° | 53° | — | — |
| 1991 | 63° | 43° | 53° | — | — |
| 1990 | 58° | 49° | 53° | — | — |
| 1989 | 67° | 45° | 56° | — | — |
| 1988 | 61° | 44° | 52° | — | — |
| 1987 | 55° | 41° | 48° | 0.74" | — |
| 1986 | 55° | 45° | 50° | 0.05" | — |
| 1985 | 55° | 41° | 48° | 0.66" | — |
| 1984 | 60° | 46° | 53° | 0.25" | — |
| 1983 | 69° | 49° | 59° | — | — |
| 1982 | 51° | 36° | 43° | — | — |
| 1981 | 66° | 41° | 54° | — | — |
| 1980 | 65° | 52° | 58° | 0.13" | — |
| 1979 | 56° | 43° | 49° | 0.08" | — |
| 1978 | 58° | 46° | 52° | 0.48" | — |
| 1977 | 54° | 43° | 48° | — | — |
| 1976 | 55° | 41° | 48° | — | — |
| 1975 | 56° | 46° | 51° | 0.1" | — |
| 1974 | 56° | 43° | 49° | 0.03" | — |
| 1973 | 48° | 41° | 45° | 0.64" | — |
| 1972 | 55° | 40° | 47° | — | — |
| 1971 | 54° | 44° | 49° | — | — |
55 years of data from SEATTLE URBAN SITE