Weather on August 20
Surprise, AZ
55 Years of Data
Avg High
104°F
Avg Low
79°F
Warmest
2025
101°F avg
Coldest
1979
81°F avg
About This Date
August 20th in Surprise, AZ typically brings hot summer weather, with average highs around 104°F and lows near 79°F — a 25°F daily swing. Over 55 years of records, the warmest August 20th was in 2025 (101°F average), while the coldest was 1979 (81°F) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 16% of August 20th dates historically, with the wettest August 20th recording 1.27" of rain. 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 August 20th in Surprise, AZ? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025warmest | 112° | 90° | 101° | — | — |
| 2024 | 111° | 81° | 96° | — | — |
| 2023 | 98° | 79° | 88° | — | — |
| 2022 | 97° | 70° | 83° | — | — |
| 2021 | 98° | 80° | 89° | — | — |
| 2020 | 110° | 81° | 95° | 0.13" | — |
| 2019 | 108° | 81° | 94° | — | — |
| 2018 | 107° | 86° | 97° | — | — |
| 2017 | 99° | 81° | 90° | — | — |
| 2016 | 103° | 81° | 92° | — | — |
| 2015 | 105° | 82° | 94° | — | — |
| 2014 | 98° | 73° | 86° | 0.51" | — |
| 2013 | 111° | 82° | 97° | — | — |
| 2012 | 105° | 83° | 94° | — | — |
| 2011 | 106° | 80° | 93° | — | — |
| 2010 | 107° | 84° | 96° | — | — |
| 2009 | 109° | 82° | 96° | — | — |
| 2008 | 106° | 80° | 93° | — | — |
| 2007 | 104° | 85° | 94° | — | — |
| 2006 | 106° | 86° | 96° | — | — |
| 2005 | 107° | 81° | 94° | — | — |
| 2004 | 101° | 77° | 89° | — | — |
| 2003 | 98° | 77° | 88° | — | — |
| 2002 | 103° | 80° | 91° | — | — |
| 2001 | 105° | 84° | 95° | — | — |
| 2000 | 107° | 84° | 96° | — | — |
| 1999 | 106° | 81° | 93° | — | — |
| 1998 | 109° | 80° | 95° | — | — |
| 1997 | 109° | 81° | 95° | — | — |
| 1996 | 105° | 84° | 95° | — | — |
| 1995 | 102° | 75° | 89° | 1.27" | — |
| 1994 | 106° | 79° | 92° | — | — |
| 1993 | 104° | 81° | 92° | — | — |
| 1992 | 108° | 79° | 93° | 0.1" | — |
| 1991 | 107° | 76° | 91° | — | — |
| 1990 | 100° | 75° | 88° | — | — |
| 1989 | 100° | 77° | 89° | — | — |
| 1988 | 102° | 76° | 89° | 0.25" | — |
| 1987 | 104° | 82° | 93° | — | — |
| 1986 | 107° | 82° | 95° | — | — |
| 1985 | 102° | 71° | 87° | 1.24" | — |
| 1984 | 93° | 75° | 84° | 0.05" | — |
| 1983 | 95° | 72° | 83° | — | — |
| 1982 | 112° | 88° | 100° | — | — |
| 1981 | 109° | 79° | 94° | — | — |
| 1980 | 99° | 67° | 83° | — | — |
| 1979coldest | 98° | 65° | 81° | — | — |
| 1978 | 105° | 77° | 91° | — | — |
| 1977 | 106° | 79° | 92° | — | — |
| 1976 | 108° | 74° | 91° | — | — |
| 1975 | 100° | 73° | 87° | 0.18" | — |
| 1974 | 105° | 71° | 88° | — | — |
| 1973 | 104° | 75° | 90° | — | — |
| 1972 | 103° | 77° | 90° | — | — |
| 1971 | 94° | 72° | 83° | 0.05" | — |
55 years of data from YOUNGTOWN