Weather on June 30
San Marcos, CA
55 Years of Data
Avg High
85°F
Avg Low
60°F
Warmest
1985
84°F avg
Coldest
1982
65°F avg
About This Date
June 30th in San Marcos, CA typically brings warm summer weather, with average highs around 85°F and lows near 60°F — a 25°F daily swing. Over 55 years of records, the warmest June 30th was in 1985 (84°F average), while the coldest was 1982 (65°F) — a 19°F range across recorded history. Rain or other precipitation has occurred on about 2% of June 30th dates historically, with the wettest June 30th recording 0.64" of rain. The last decade has been 4.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.7°F warmer on this date compared to 20-30 years ago.
Planning for June 30th 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 | 91° | 62° | 77° | — | — |
| 2024 | 95° | 63° | 79° | — | — |
| 2023 | 89° | 60° | 75° | — | — |
| 2022 | 92° | 65° | 78° | — | — |
| 2021 | 86° | 63° | 74° | — | — |
| 2020 | 80° | 59° | 70° | — | — |
| 2019 | 94° | 67° | 80° | — | — |
| 2018 | 82° | 62° | 72° | — | — |
| 2017 | 83° | 62° | 72° | — | — |
| 2016 | 88° | 66° | 77° | — | — |
| 2015 | 89° | 66° | 78° | 0.64" | — |
| 2014 | 83° | 64° | 73° | — | — |
| 2013 | 92° | 70° | 81° | — | — |
| 2012 | 86° | 51° | 69° | — | — |
| 2011 | 84° | 59° | 72° | — | — |
| 2010 | 70° | 62° | 66° | — | — |
| 2009 | 71° | 62° | 67° | — | — |
| 2008 | 73° | 64° | 69° | — | — |
| 2007 | 74° | 62° | 68° | — | — |
| 2006 | 82° | 66° | 74° | — | — |
| 2005 | 82° | 58° | 70° | — | — |
| 2004 | 77° | 59° | 68° | — | — |
| 2003 | 73° | 61° | 67° | — | — |
| 2002 | 81° | 49° | 65° | — | — |
| 2001 | 88° | 62° | 75° | — | — |
| 2000 | 86° | 62° | 74° | — | — |
| 1999 | 70° | 61° | 65° | — | — |
| 1998 | 89° | 59° | 74° | — | — |
| 1997 | 83° | 59° | 71° | — | — |
| 1996 | 99° | 58° | 78° | — | — |
| 1995 | 88° | 59° | 73° | — | — |
| 1994 | 89° | 64° | 77° | — | — |
| 1993 | 89° | 59° | 74° | — | — |
| 1992 | 82° | 60° | 71° | — | — |
| 1991 | 83° | 56° | 69° | — | — |
| 1990 | 92° | 61° | 76° | — | — |
| 1989 | 80° | 54° | 67° | — | — |
| 1988 | 80° | 62° | 71° | — | — |
| 1987 | 74° | 60° | 67° | — | — |
| 1986 | 92° | 65° | 78° | — | — |
| 1985warmest | 104° | 64° | 84° | — | — |
| 1984 | 90° | 60° | 75° | — | — |
| 1983 | 79° | 62° | 70° | — | — |
| 1982coldest | 74° | 57° | 65° | — | — |
| 1981 | 88° | 59° | 73° | — | — |
| 1980 | 92° | 63° | 77° | — | — |
| 1979 | 93° | 60° | 77° | — | — |
| 1978 | 84° | 54° | 69° | — | — |
| 1977 | 88° | 59° | 73° | — | — |
| 1976 | 91° | 59° | 75° | — | — |
| 1975 | 87° | 51° | 69° | — | — |
| 1974 | 83° | 58° | 70° | — | — |
| 1973 | 88° | 61° | 74° | — | — |
| 1972 | 87° | 59° | 73° | — | — |
| 1971 | 82° | 53° | 68° | — | — |
55 years of data from ESCONDIDO #2