Weather on September 15
Renton, WA
55 Years of Data
About This Date
September 15th in Renton, WA typically brings pleasant fall weather, with average highs around 72°F and lows near 52°F. Over 56 years of records, the warmest September 15th was in 2020 (70°F average), while the coldest was 1992 (52°F) — a 18°F range across recorded history. Rain or other precipitation has occurred on about 21% of September 15th dates historically. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for September 15th in Renton, WA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 69° | 55° | 62° | — | — |
| 2025 | 71° | 53° | 62° | — | — |
| 2024 | 67° | 54° | 60° | 0.03" | — |
| 2023 | 84° | 54° | 69° | — | — |
| 2022 | 70° | 59° | 64° | — | — |
| 2021 | 66° | 54° | 60° | 0.06" | — |
| 2020warmest | 78° | 62° | 70° | — | — |
| 2019 | 63° | 57° | 60° | 0.14" | — |
| 2018 | 65° | 53° | 59° | 0.01" | — |
| 2017 | 76° | 47° | 61° | — | — |
| 2016 | 72° | 50° | 61° | — | — |
| 2015 | 66° | 51° | 59° | — | — |
| 2014 | 86° | 51° | 69° | — | — |
| 2013 | 67° | 59° | 63° | 0.07" | — |
| 2012 | 75° | 52° | 63° | — | — |
| 2011 | 66° | 58° | 62° | — | — |
| 2010 | 70° | 55° | 62° | 0.18" | — |
| 2009 | 79° | 58° | 68° | — | — |
| 2008 | 81° | 50° | 65° | — | — |
| 2007 | 66° | 59° | 63° | — | — |
| 2006 | 64° | 49° | 56° | — | — |
| 2005 | 67° | 56° | 61° | — | — |
| 2004 | 65° | 55° | 60° | 0.01" | — |
| 2003 | 67° | 47° | 57° | — | — |
| 2002 | 67° | 59° | 63° | — | — |
| 2001 | 76° | 54° | 65° | — | — |
| 2000 | 75° | 60° | 68° | — | — |
| 1999 | 63° | 57° | 60° | — | — |
| 1998 | 76° | 55° | 65° | — | — |
| 1997 | 65° | 55° | 60° | 0.36" | — |
| 1996 | 63° | 53° | 58° | 0.35" | — |
| 1995 | 81° | 55° | 68° | — | — |
| 1994 | 76° | 60° | 68° | — | — |
| 1993 | 72° | 48° | 60° | — | — |
| 1992coldest | 65° | 40° | 52° | — | — |
| 1991 | 75° | 50° | 63° | — | — |
| 1990 | 69° | 54° | 61° | 0.01" | — |
| 1989 | 76° | 51° | 63° | — | — |
| 1988 | 79° | 50° | 64° | — | — |
| 1987 | 66° | 48° | 57° | 0.35" | — |
| 1986 | 67° | 45° | 56° | — | — |
| 1985 | 67° | 51° | 59° | — | — |
| 1984 | 85° | 49° | 67° | — | — |
| 1983 | 72° | 44° | 58° | 0.02" | — |
| 1982 | 70° | 37° | 53° | — | — |
| 1981 | 90° | 44° | 67° | — | — |
| 1980 | 77° | 49° | 63° | — | — |
| 1979 | 71° | 56° | 63° | — | — |
| 1978 | 69° | 56° | 62° | — | — |
| 1977 | 66° | 48° | 57° | — | — |
| 1976 | 64° | 45° | 54° | — | — |
| 1975 | 73° | 56° | 64° | — | — |
| 1974 | 87° | 46° | 67° | — | — |
| 1973 | 78° | 40° | 59° | — | — |
| 1972 | 74° | 43° | 58° | — | — |
| 1971 | 68° | 39° | 54° | — | — |
Renton, WA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Renton, WA Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Renton, WA Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Renton, WA
Most pleasant months in Renton, WA: May, June, July, August, September.
What to expect on September 15th
This page shows what actually happened each year. For the odds — typical high and low, and how often it stays dry — see the climatological outlook for this date.
September 15th outlook →