Wing-Chi Poon / CC BY-SA 2.5
Mission Viejo, CA Weather on July 17
July 17th in Mission Viejo, CA typically brings warm summer weather, with average highs around 84°F and lows near 61°F. Over 55 years of records, the warmest July 17th was in 1998 (80°F average), while the coldest was 1987 (63°F) — a 17°F range across recorded history. Rain or other precipitation has occurred on about 2% of July 17th dates historically. Temperatures on this date have remained relatively stable over the past several decades.
What to Expect on July 17
Planning for July 17th in Mission Viejo, CA? Stay hydrated and seek shade during peak afternoon hours.
July 17 Weather Records for Mission Viejo
- •The all-time record high for July 17th in Mission Viejo, CA is 100°F, set in 1998.
- •The coldest July 17th on record dropped to 54°F in 2001.
- •Temperatures have reached 90°F or higher on July 17th in 10 of the last 55 years.
Frequently Asked Questions
What was the warmest July 17 ever in Mission Viejo?
The warmest July 17 in Mission Viejo, CA reached 100°F in 1998. That is 16°F above the long-term average high of 84°F.
What was the coldest July 17 ever in Mission Viejo?
The coldest July 17 in Mission Viejo, CA dropped to 54°F in 2001. That is 7°F below the long-term average low of 61°F.
What is the average temperature on July 17 in Mission Viejo?
On July 17, Mission Viejo averages a high of 84°F and a low of 61°F based on 55 years of NOAA weather observations from EL TORO MCAS.
How many years of weather data are available for July 17 in Mission Viejo?
We have 55 years of weather records for July 17 in Mission Viejo, CA, sourced from NOAA's Global Historical Climatology Network. Records include daily high and low temperatures, precipitation, and snowfall data going back to 2025.
July 17 Weather History in Mission Viejo
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 85°F | 58°F | -- | -- |
| 2024 | 82°F | 63°F | -- | -- |
| 2023 | 91°F | 63°F | -- | -- |
| 2022 | 86°F | 61°F | -- | -- |
| 2021 | 82°F | 63°F | -- | -- |
| 2020 | 82°F | 60°F | -- | -- |
| 2019 | 77°F | 60°F | -- | -- |
| 2018 | 82°F | 65°F | -- | -- |
| 2017 | 81°F | 63°F | -- | -- |
| 2016 | 80°F | 62°F | -- | -- |
| 2015 | 84°F | 61°F | -- | -- |
| 2014 | 79°F | 61°F | -- | -- |
| 2013 | 93°F | 58°F | -- | -- |
| 2012 | 75°F | 58°F | -- | -- |
| 2011 | 82°F | 56°F | -- | -- |
| 2010 | 93°F | 62°F | -- | -- |
| 2009 | 96°F | 62°F | -- | -- |
| 2008 | 86°F | 60°F | -- | -- |
| 2007 | 82°F | 60°F | -- | -- |
| 2006 | 90°F | 65°F | -- | -- |
| 2005 | 92°F | 57°F | -- | -- |
| 2004 | 91°F | 64°F | -- | -- |
| 2003 | 88°F | 62°F | -- | -- |
| 2002 | 81°F | 59°F | -- | -- |
| 2001 | 79°F | 54°F | -- | -- |
| 2000 | 89°F | 55°F | -- | -- |
| 1999 | 86°F | 59°F | -- | -- |
| 1998 | 100°F | 61°F | -- | -- |
| 1997 | 82°F | 62°F | 0" | -- |
| 1996 | 76°F | 62°F | 0" | -- |
| 1995 | 83°F | 63°F | 0" | -- |
| 1994 | 81°F | 65°F | 0" | -- |
| 1993 | 77°F | 64°F | 0" | -- |
| 1992 | 89°F | 66°F | 0" | -- |
| 1991 | 77°F | 65°F | 0" | -- |
| 1990 | 83°F | 68°F | 0" | -- |
| 1989 | 79°F | 61°F | 0" | -- |
| 1988 | 83°F | 61°F | 0" | -- |
| 1987 | 68°F | 57°F | 0.18" | -- |
| 1986 | 82°F | 61°F | 0" | -- |
| 1985 | 83°F | 68°F | 0" | -- |
| 1984 | 90°F | 69°F | 0" | -- |
| 1983 | 82°F | 60°F | 0" | -- |
| 1982 | 81°F | 62°F | 0" | -- |
| 1981 | 86°F | 66°F | 0" | -- |
| 1980 | 81°F | 62°F | 0" | -- |
| 1979 | 91°F | 65°F | 0" | -- |
| 1978 | 82°F | 61°F | 0" | -- |
| 1977 | 86°F | 63°F | 0" | -- |
| 1976 | 77°F | 62°F | 0" | -- |
| 1975 | 78°F | 62°F | 0" | -- |
| 1974 | 88°F | 56°F | 0" | -- |
| 1973 | 79°F | 55°F | 0" | -- |
| 1972 | 82°F | 62°F | 0" | -- |
| 1971 | 88°F | 62°F | 0" | -- |
Based on 55 years of data from NOAA station: EL TORO MCAS
Monthly Climate Averages
Historical temperature and precipitation averages for Mission Viejo, CA, based on 55+ years of weather data.
Temperatures in Fahrenheit. Precipitation and snowfall in inches.