All-time weather records — Marshalltown, IA
Climate change signal in Marshalltown
of Marshalltown's all-time daily heat records were set in the last decade (0 of 366 records since 2015).
of all-time daily cold records were set in the last decade (0 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 | # |
|---|---|---|---|---|
| 1950s | · | · | ||
| 1960s | · | · | ||
| 1970s | 7 | 8 | ||
| 1980s | · | · | ||
| 1990s | 359 | 358 | ||
| 2010s | · | · | ||
| 2020s | · | · |
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 1978, the latest in 1994. Period of observation: 1954-2026.
Records by month
| Month | Hottest day | Coldest day | Wettest day |
|---|---|---|---|
| January | 52.0°F — Jan 11, 1992 | -18.9°F — Jan 20, 1994 | 1.48 in — Jan 22, 2018 |
| February | 60.1°F — Feb 21, 1991 | -11.9°F — Feb 9, 1994 | 1.03 in — Feb 15, 1992 |
| March | 84.0°F — Mar 26, 1991 | 1.9°F — Mar 13, 1993 | 2.13 in — Mar 31, 1993 |
| April | 89.1°F — Apr 18, 1994 | 24.1°F — Apr 1, 1992 | 2.65 in — Apr 18, 2013 |
| May | 96.1°F — May 29, 1991 | 35.1°F — May 6, 1992 | 4.55 in — May 27, 2013 |
| June | 99.0°F — Jun 18, 1994 | 46.9°F — Jun 1, 1993 | 2.80 in — Jun 17, 2014 |
| July | 99.0°F — Jul 18, 1991 | 54.0°F — Jul 31, 1992 | 4.20 in — Jul 8, 1993 |
| August | 96.1°F — Aug 2, 1991 | 50.0°F — Aug 28, 1992 | 3.76 in — Aug 16, 1993 |
| September | 93.0°F — Sep 14, 1994 | 34.0°F — Sep 19, 1991 | 3.05 in — Sep 4, 2018 |
| October | 84.9°F — Oct 7, 1993 | 21.0°F — Oct 31, 1993 | 2.75 in — Oct 25, 2021 |
| November | 75.0°F — Nov 1, 1990 | 1.0°F — Nov 8, 1991 | 2.11 in — Nov 5, 2022 |
| December | 57.9°F — Dec 1, 1994 | -11.0°F — Dec 22, 1990 | 2.45 in — Dec 14, 2015 |
Click a month to see every daily record for that month in Marshalltown.