All-time weather records — Norco, CA

Record high
129.0°F
July 1, 2003
Record low
20.1°F
January 14, 2007
Wettest day
3.46 in
February 5, 2024

Climate change signal in Norco

55.5%

of Norco's all-time daily heat records were set in the last decade (203 of 366 records since 2015).

8.2%

of all-time daily cold records were set in the last decade (30 of 366 records since 2015).

If records were spread evenly across the station's history, you'd expect roughly 5% per decade. Decade-by-decade, here's where each record-breaking day was set:

Decade Heat records set # Cold records set #
1990s
9
68
2000s
100
195
2010s
147
88
2020s
110
15

Records are the all-time daily extremes that are still standing — each daily record can only be held by one year. The station's earliest hot record was set in 1998, the latest in 2026. Period of observation: 1998-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 93.0°F — Jan 15, 2021 20.1°F — Jan 14, 2007 2.97 in — Jan 9, 2005
February 95.0°F — Feb 16, 2016 27.0°F — Feb 1, 2002 3.46 in — Feb 5, 2024
March 100.0°F — Mar 19, 2026 28.0°F — Mar 3, 2002 1.67 in — Mar 12, 2020
April 127.0°F — Apr 1, 1998 30.9°F — Apr 2, 1999 1.32 in — Apr 6, 2020
May 104.0°F — May 10, 2025 32.0°F — May 30, 2002 0.65 in — May 4, 2023
June 115.0°F — Jun 20, 2016 32.0°F — Jun 16, 2002 0.25 in — Jun 2, 1999
July 129.0°F — Jul 1, 2003 50.0°F — Jul 1, 2004 0.64 in — Jul 19, 2015
August 115.0°F — Aug 31, 2017 51.1°F — Aug 8, 1999 2.41 in — Aug 20, 2023
September 120.9°F — Sep 6, 2020 46.9°F — Sep 9, 2000 0.73 in — Sep 15, 2015
October 111.0°F — Oct 1, 2020 33.1°F — Oct 29, 2009 2.62 in — Oct 20, 2004
November 100.0°F — Nov 3, 2010 27.0°F — Nov 13, 2000 1.91 in — Nov 28, 2019
December 91.9°F — Dec 1, 2021 23.0°F — Dec 24, 1998 1.84 in — Dec 22, 2010

Click a month to see every daily record for that month in Norco.