Weather on November 18
Ontario, CA
55 Years of Data
About This Date
November 18th in Ontario, CA typically brings pleasant fall weather, with average highs around 72°F and lows near 46°F — a 26°F daily swing. Over 41 years of records, the warmest November 18th was in 2005 (71°F average), while the coldest was 1973 (49°F) — a 22°F range across recorded history. Rain or other precipitation has occurred on about 2% of November 18th dates historically, with the wettest November 18th recording 3.48" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for November 18th in Ontario, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 59° | 45° | 52° | — | — |
| 2024 | 64° | 42° | 53° | — | — |
| 2023 | 71° | 58° | 64° | — | — |
| 2022 | 71° | 42° | 57° | — | — |
| 2021 | 74° | 49° | 61° | — | — |
| 2020 | 69° | 48° | 59° | — | — |
| 2019 | 91° | 51° | 71° | — | — |
| 2018 | 77° | 49° | 63° | — | — |
| 2017 | 79° | 51° | 65° | — | — |
| 2016 | 78° | 43° | 60° | — | — |
| 2015 | 77° | 45° | 61° | — | — |
| 2014 | 77° | 46° | 62° | — | — |
| 2013 | 68° | 47° | 57° | — | — |
| 2012 | 69° | 52° | 60° | — | — |
| 2011 | 56° | 50° | 53° | — | — |
| 2010 | 79° | 49° | 64° | — | — |
| 2009 | 71° | 45° | 58° | — | — |
| 2008 | 88° | 55° | 71° | — | — |
| 2007 | 76° | 47° | 61° | — | — |
| 2006 | 86° | 53° | 70° | — | — |
| 2005warmest | 87° | 56° | 71° | — | — |
| 2004 | 75° | 48° | 62° | — | — |
| 2003 | 79° | 44° | 61° | — | — |
| 2002 | 82° | 45° | 63° | — | — |
| 2001 | 76° | 46° | 61° | — | — |
| 2000 | 70° | 41° | 55° | — | — |
| 1999 | 67° | 46° | 56° | — | — |
| 1998 | 67° | 46° | 56° | — | — |
| 1983 | 66° | 45° | 55° | — | — |
| 1982 | 63° | 43° | 53° | — | — |
| 1981 | 76° | 43° | 59° | — | — |
| 1980 | 70° | 38° | 54° | — | — |
| 1979 | 64° | 45° | 54° | — | — |
| 1978 | 72° | 43° | 57° | — | — |
| 1977 | 66° | 46° | 56° | — | — |
| 1976 | 80° | 53° | 67° | — | — |
| 1975 | 57° | 42° | 50° | — | — |
| 1974 | 62° | 44° | 53° | — | — |
| 1973coldest | 56° | 43° | 49° | 3.48" | — |
| 1972 | 61° | 40° | 50° | — | — |
| 1971 | 60° | 39° | 50° | — | — |
Ontario, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Ontario, CA Monthly Precipitation
Average rainfall per month, in inches.
Ontario, 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 Ontario, CA
Ontario, CA has no months that meet our "pleasant" threshold — every season has tradeoffs.