Weather on March 29
Ontario, CA
55 Years of Data
Avg High
72°F
Avg Low
47°F
Warmest
2026
75°F avg
Coldest
1982
44°F avg
About This Date
March 29th in Ontario, CA typically brings pleasant spring weather, with average highs around 72°F and lows near 47°F — a 25°F daily swing. Over 42 years of records, the warmest March 29th was in 2026 (75°F average), while the coldest was 1982 (44°F) — a 31°F range across recorded history. Rain or other precipitation has occurred on about 14% of March 29th dates historically, with the wettest March 29th recording 1.24" 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 March 29th in Ontario, CA? Great weather for outdoor activities.
Warming Trend
1.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 91° | 59° | 75° | — | — |
| 2025 | 66° | 52° | 59° | — | — |
| 2024 | 63° | 46° | 54° | — | — |
| 2023 | 59° | 45° | 52° | 1.24" | — |
| 2022 | 63° | 50° | 56° | 0.25" | — |
| 2021 | 83° | 52° | 67° | — | — |
| 2020 | 65° | 45° | 55° | — | — |
| 2019 | 76° | 50° | 63° | — | — |
| 2018 | 82° | 52° | 67° | — | — |
| 2017 | 85° | 50° | 67° | — | — |
| 2016 | 64° | 44° | 54° | 0.1" | — |
| 2015 | 88° | 54° | 71° | — | — |
| 2014 | 81° | 51° | 66° | — | — |
| 2013 | 82° | 52° | 67° | — | — |
| 2012 | 71° | 51° | 61° | — | — |
| 2011 | 77° | 46° | 62° | — | — |
| 2010 | 81° | 52° | 66° | — | — |
| 2009 | 68° | 47° | 57° | — | — |
| 2008 | 67° | 49° | 58° | — | — |
| 2007 | 77° | 43° | 60° | — | — |
| 2006 | 62° | 48° | 55° | 0.53" | — |
| 2005 | 68° | 43° | 55° | — | — |
| 2004 | 93° | 51° | 72° | — | — |
| 2003 | 80° | 55° | 68° | — | — |
| 2002 | 62° | 48° | 55° | — | — |
| 2001 | 71° | 54° | 62° | — | — |
| 2000 | 63° | 49° | 56° | — | — |
| 1999 | 80° | 44° | 62° | — | — |
| 1984 | 81° | 41° | 61° | — | — |
| 1983 | 68° | 44° | 56° | — | — |
| 1982coldest | 53° | 36° | 44° | 0.1" | — |
| 1981 | 60° | 50° | 55° | — | — |
| 1980 | 77° | 45° | 61° | — | — |
| 1979 | 53° | 43° | 48° | 0.46" | — |
| 1978 | 70° | 54° | 62° | — | — |
| 1977 | 61° | 37° | 49° | — | — |
| 1976 | 71° | 37° | 54° | — | — |
| 1975 | 62° | 39° | 51° | — | — |
| 1974 | 70° | 46° | 58° | — | — |
| 1973 | 63° | 33° | 48° | — | — |
| 1972 | 65° | 35° | 50° | — | — |
| 1971 | 90° | 47° | 68° | — | — |
42 years of data from ONTARIO INTL AP