Weather on June 20
San Marcos, CA
55 Years of Data
Avg High
84°F
Avg Low
59°F
Warmest
2016
88°F avg
Coldest
2003
56°F avg
About This Date
June 20th in San Marcos, CA typically brings warm summer weather, with average highs around 84°F and lows near 59°F — a 25°F daily swing. Over 55 years of records, the warmest June 20th was in 2016 (88°F average), while the coldest was 2003 (56°F) — a 32°F range across recorded history. Rain or other precipitation has occurred on about 7% of June 20th dates historically. The last decade has been 4.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.5°F warmer on this date compared to 20-30 years ago.
Planning for June 20th in San Marcos, CA? 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 | 82° | 61° | 71° | — | — |
| 2024 | 85° | 60° | 72° | — | — |
| 2023 | 84° | 58° | 71° | — | — |
| 2022 | 92° | 59° | 75° | — | — |
| 2021 | 85° | 61° | 73° | — | — |
| 2020 | 77° | 63° | 70° | — | — |
| 2019 | 78° | 62° | 70° | — | — |
| 2018 | 86° | 60° | 73° | — | — |
| 2017 | 96° | 65° | 80° | — | — |
| 2016warmest | 106° | 70° | 88° | — | — |
| 2015 | 91° | 62° | 77° | — | — |
| 2014 | 87° | 59° | 73° | — | — |
| 2013 | 85° | 59° | 72° | — | — |
| 2012 | 81° | 59° | 70° | — | — |
| 2011 | 82° | 57° | 70° | — | — |
| 2010 | 69° | 60° | 65° | — | — |
| 2009 | 67° | 63° | 65° | — | — |
| 2008 | 90° | 60° | 75° | — | — |
| 2007 | 71° | 61° | 66° | — | — |
| 2006 | 97° | — | — | — | — |
| 2005 | 85° | 55° | 70° | — | — |
| 2004 | 76° | 61° | 68° | — | — |
| 2003coldest | 67° | 46° | 56° | 0.25" | — |
| 2002 | 80° | 59° | 70° | — | — |
| 2001 | 92° | 57° | 74° | — | — |
| 2000 | 86° | 60° | 73° | — | — |
| 1999 | 80° | 57° | 69° | — | — |
| 1998 | 80° | 66° | 73° | — | — |
| 1997 | 80° | 64° | 72° | — | — |
| 1996 | 85° | 61° | 73° | — | — |
| 1995 | 82° | 54° | 68° | — | — |
| 1994 | 84° | 57° | 71° | — | — |
| 1993 | 87° | 64° | 76° | — | — |
| 1992 | 84° | 56° | 70° | — | — |
| 1991 | 75° | 55° | 65° | — | — |
| 1990 | 83° | 58° | 70° | — | — |
| 1989 | 96° | 65° | 80° | — | — |
| 1988 | 76° | 57° | 66° | — | — |
| 1987 | 76° | 58° | 67° | — | — |
| 1986 | 84° | 56° | 70° | — | — |
| 1985 | 84° | 60° | 72° | — | — |
| 1984 | 86° | 58° | 72° | — | — |
| 1983 | 81° | 57° | 69° | — | — |
| 1982 | 67° | 59° | 63° | 0.03" | — |
| 1981 | 91° | 60° | 76° | — | — |
| 1980 | 89° | 54° | 71° | — | — |
| 1979 | 80° | 53° | 67° | — | — |
| 1978 | 95° | 56° | 75° | — | — |
| 1977 | 79° | 57° | 68° | — | — |
| 1976 | 88° | 57° | 72° | — | — |
| 1975 | 71° | 54° | 62° | 0.03" | — |
| 1974 | 87° | 51° | 69° | — | — |
| 1973 | 104° | 58° | 81° | — | — |
| 1972 | 78° | 61° | 69° | 0.25" | — |
| 1971 | 96° | 54° | 75° | — | — |
55 years of data from ESCONDIDO #2