All-time weather records — Ione, WA
Climate change signal in Ione
of Ione's all-time daily heat records were set in the last decade (141 of 366 records since 2015).
of all-time daily cold records were set in the last decade (74 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 | # |
|---|---|---|---|---|
| 1980s | · | · | ||
| 1990s | 63 | 143 | ||
| 2000s | 127 | 93 | ||
| 2010s | 89 | 87 | ||
| 2020s | 87 | 43 |
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 1990, the latest in 2026. Period of observation: 1980-2026.
Records by month
| Month | Hottest day | Coldest day | Wettest day |
|---|---|---|---|
| January | 44.2°F — Jan 26, 2015 | -39.3°F — Jan 13, 2024 | 1.90 in — Jan 10, 2006 |
| February | 50.4°F — Feb 27, 2005 | -25.6°F — Feb 2, 1996 | 2.60 in — Feb 9, 2017 |
| March | 63.5°F — Mar 21, 2019 | -22.0°F — Mar 11, 2009 | 2.10 in — Mar 15, 2017 |
| April | 75.7°F — Apr 19, 2016 | -4.9°F — Apr 10, 2010 | 2.30 in — Apr 23, 1996 |
| May | 81.5°F — May 16, 2006 | -2.7°F — May 8, 2002 | 2.20 in — May 29, 1990 |
| June | 97.7°F — Jun 29, 2021 | 24.3°F — Jun 1, 2000 | 2.70 in — Jun 1, 1990 |
| July | 94.5°F — Jul 22, 2006 | 28.2°F — Jul 4, 1999 | 1.70 in — Jul 8, 2002 |
| August | 92.7°F — Aug 10, 2018 | 24.1°F — Aug 25, 1992 | 2.10 in — Aug 9, 1989 |
| September | 87.8°F — Sep 2, 2025 | 12.7°F — Sep 30, 2019 | 1.90 in — Sep 23, 1986 |
| October | 76.8°F — Oct 1, 1992 | -7.2°F — Oct 30, 1991 | 2.10 in — Oct 20, 2016 |
| November | 51.3°F — Nov 6, 2006 | -24.9°F — Nov 24, 2010 | 2.80 in — Nov 6, 2006 |
| December | 43.0°F — Dec 15, 2025 | -30.1°F — Dec 29, 1990 | 3.00 in — Dec 5, 2023 |
Click a month to see every daily record for that month in Ione.