Weather on January 18
Mission Viejo, CA
55 Years of Data
About This Date
January 18th in Mission Viejo, CA typically brings mild winter weather, with average highs around 69°F and lows near 50°F. Over 56 years of records, the warmest January 18th was in 2005 (75°F average), while the coldest was 1988 (48°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 7% of January 18th dates historically, with the wettest January 18th recording 1.29" of rain. The last decade has been 2.7°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.7°F cooler on this date compared to 20-30 years ago.
Planning for January 18th in Mission Viejo, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 79° | 59° | 69° | — | — |
| 2025 | 63° | 44° | 53° | — | — |
| 2024 | 67° | 49° | 58° | — | — |
| 2023 | 59° | 42° | 51° | — | — |
| 2022 | 63° | 53° | 58° | — | — |
| 2021 | 79° | 47° | 63° | — | — |
| 2020 | 70° | 49° | 59° | — | — |
| 2019 | 64° | 51° | 58° | — | — |
| 2018 | 75° | 55° | 65° | — | — |
| 2017 | 61° | 45° | 53° | — | — |
| 2016 | 64° | 51° | 58° | — | — |
| 2015 | 73° | 56° | 64° | — | — |
| 2014 | 83° | 62° | 72° | — | — |
| 2013 | 80° | 59° | 70° | — | — |
| 2012 | 66° | 43° | 54° | — | — |
| 2011 | 80° | 59° | 70° | — | — |
| 2010 | 56° | 50° | 53° | — | — |
| 2009 | 86° | 64° | 75° | — | — |
| 2008 | 64° | 46° | 55° | — | — |
| 2007 | 67° | 41° | 54° | — | — |
| 2006 | 65° | 45° | 55° | — | — |
| 2005warmest | 86° | 65° | 75° | — | — |
| 2004 | 66° | 46° | 56° | — | — |
| 2003 | 82° | 53° | 68° | — | — |
| 2002 | 65° | 55° | 60° | — | — |
| 2001 | 64° | 45° | 54° | — | — |
| 2000 | 78° | 63° | 70° | — | — |
| 1999 | 58° | 47° | 52° | — | — |
| 1998 | 66° | 55° | 61° | — | — |
| 1997 | 73° | 47° | 60° | — | — |
| 1996 | 66° | 48° | 57° | — | — |
| 1995 | 64° | 42° | 53° | — | — |
| 1994 | 82° | 56° | 69° | — | — |
| 1993 | 57° | 49° | 53° | 1.29" | — |
| 1992 | 66° | 44° | 55° | — | — |
| 1991 | 71° | 51° | 61° | — | — |
| 1990 | 56° | 42° | 49° | — | — |
| 1989 | 79° | 49° | 64° | — | — |
| 1988coldest | 56° | 40° | 48° | — | — |
| 1987 | 61° | 41° | 51° | — | — |
| 1986 | 84° | 49° | 66° | — | — |
| 1985 | 68° | 44° | 56° | — | — |
| 1984 | 63° | 40° | 51° | — | — |
| 1983 | 66° | 45° | 55° | — | — |
| 1982 | 58° | 46° | 52° | — | — |
| 1981 | 75° | 51° | 63° | — | — |
| 1980 | 68° | 54° | 61° | 0.06" | — |
| 1979 | 56° | 44° | 50° | 0.22" | — |
| 1978 | 64° | 50° | 57° | — | — |
| 1977 | 80° | 58° | 69° | — | — |
| 1976 | 76° | 51° | 63° | — | — |
| 1975 | 78° | 50° | 64° | — | — |
| 1974 | 64° | 53° | 59° | — | — |
| 1973 | 60° | 41° | 51° | 1.08" | — |
| 1972 | 60° | 46° | 53° | — | — |
| 1971 | 89° | 58° | 73° | — | — |
Mission Viejo, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Mission Viejo, CA Monthly Precipitation
Average rainfall per month, in inches.
Mission Viejo, CA 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 Mission Viejo, CA
Most pleasant months in Mission Viejo, CA: January, February, March, April, May, June, October, November, December.
What to expect on January 18th
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.
January 18th outlook →