All-time weather records — Royal, IA

Record high
102.9°F
May 14, 2013
Record low
-36.8°F
January 2, 2010
Wettest day
5.50 in
September 14, 2004

Climate change signal in Royal

44.3%

of Royal's all-time daily heat records were set in the last decade (162 of 366 records since 2015).

30.1%

of all-time daily cold records were set in the last decade (110 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
34
47
2000s
106
133
2010s
103
125
2020s
123
61

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 1996, the latest in 2026. Period of observation: 1996-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 64.0°F — Jan 26, 2002 -36.8°F — Jan 2, 2010 0.44 in — Jan 16, 2023
February 73.9°F — Feb 26, 2024 -26.9°F — Feb 16, 2021 0.68 in — Feb 14, 2023
March 89.1°F — Mar 21, 2026 -20.9°F — Mar 5, 2003 1.54 in — Mar 29, 2007
April 95.0°F — Apr 29, 2007 7.2°F — Apr 4, 2018 3.79 in — Apr 6, 2005
May 102.9°F — May 14, 2013 19.9°F — May 3, 2005 2.98 in — May 13, 2023
June 100.0°F — Jun 2, 2020 32.0°F — Jun 18, 2010 4.38 in — Jun 21, 2024
July 100.9°F — Jul 16, 2006 34.0°F — Jul 26, 2008 2.76 in — Jul 14, 2011
August 100.0°F — Aug 2, 2022 -0.8°F — Aug 16, 2010 2.97 in — Aug 10, 2010
September 100.9°F — Sep 20, 2022 22.1°F — Sep 23, 2012 5.50 in — Sep 14, 2004
October 95.0°F — Oct 1, 2023 7.2°F — Oct 18, 2022 2.15 in — Oct 4, 2016
November 80.1°F — Nov 3, 2020 -8.0°F — Nov 26, 1996 1.61 in — Nov 11, 2015
December 66.9°F — Dec 1, 1998 -26.9°F — Dec 18, 2016 1.02 in — Dec 14, 2015

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