Weather on January 23
Fullerton, CA
55 Years of Data
About This Date
January 23rd in Fullerton, CA typically brings mild winter weather, with average highs around 69°F and lows near 47°F. Over 56 years of records, the warmest January 23rd was in 2025 (73°F average), while the coldest was 1997 (49°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 20% of January 23rd dates historically, with the wettest January 23rd recording 14.48" of rain. 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 January 23rd in Fullerton, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 66° | 54° | 60° | — | — |
| 2025warmest | 81° | 66° | 73° | — | — |
| 2024 | 66° | 55° | 61° | — | — |
| 2023 | 69° | 49° | 59° | — | — |
| 2022 | 77° | 57° | 67° | — | — |
| 2021 | 53° | 49° | 51° | 0.84" | — |
| 2020 | 76° | 48° | 62° | — | — |
| 2019 | 71° | 44° | 58° | — | — |
| 2018 | 81° | 47° | 64° | — | — |
| 2017 | 57° | 49° | 53° | 4.78" | — |
| 2016 | 72° | 50° | 61° | — | — |
| 2015 | 78° | 49° | 63° | — | — |
| 2014 | 72° | 46° | 59° | — | — |
| 2013 | 76° | 57° | 66° | — | — |
| 2012 | 61° | 50° | 55° | 1.02" | — |
| 2011 | 78° | 49° | 63° | — | — |
| 2010 | 60° | 40° | 50° | 14.48" | — |
| 2009 | 63° | 56° | 59° | 0.69" | — |
| 2008 | 63° | 43° | 53° | 0.15" | — |
| 2007 | 70° | 41° | 55° | — | — |
| 2006 | 75° | 59° | 67° | — | — |
| 2005 | 76° | 53° | 64° | — | — |
| 2004 | 75° | 47° | 61° | — | — |
| 2003 | 70° | 53° | 61° | — | — |
| 2002 | 65° | 36° | 50° | — | — |
| 2001 | 67° | 41° | 54° | — | — |
| 2000 | 69° | 49° | 59° | — | — |
| 1999 | 70° | 42° | 56° | — | — |
| 1998 | 71° | 43° | 57° | — | — |
| 1997coldest | 56° | 43° | 49° | 2.57" | — |
| 1996 | 64° | 39° | 52° | — | — |
| 1995 | 60° | 52° | 56° | 0.61" | — |
| 1994 | 75° | 49° | 62° | — | — |
| 1993 | 71° | 49° | 60° | — | — |
| 1992 | 83° | 45° | 64° | — | — |
| 1991 | 67° | 41° | 54° | — | — |
| 1990 | 75° | 46° | 61° | — | — |
| 1989 | 67° | 51° | 59° | — | — |
| 1988 | 74° | 42° | 58° | — | — |
| 1987 | 65° | 46° | 55° | 0.08" | — |
| 1986 | 66° | 50° | 58° | — | — |
| 1985 | 67° | 46° | 56° | — | — |
| 1984 | 74° | 44° | 59° | — | — |
| 1983 | 64° | 51° | 58° | 3" | — |
| 1982 | 68° | 35° | 52° | — | — |
| 1981 | 66° | 51° | 59° | 0.48" | — |
| 1980 | 77° | 40° | 58° | — | — |
| 1979 | 63° | 43° | 53° | — | — |
| 1978 | 64° | 43° | 53° | — | — |
| 1977 | 70° | 44° | 57° | — | — |
| 1976 | 71° | 42° | 57° | — | — |
| 1975 | 77° | 42° | 60° | — | — |
| 1974 | 74° | 41° | 57° | — | — |
| 1973 | 70° | 38° | 54° | — | — |
| 1972 | 59° | 42° | 51° | — | — |
| 1971 | 61° | 49° | 55° | — | — |
Fullerton, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Fullerton, CA Monthly Precipitation
Average rainfall per month, in inches.
Fullerton, 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 Fullerton, CA
Fullerton, CA has no months that meet our "pleasant" threshold — every season has tradeoffs.