All-time weather records — Roslyn, WA
Climate change signal in Roslyn
of Roslyn's all-time daily heat records were set in the last decade (157 of 366 records since 2015).
of all-time daily cold records were set in the last decade (47 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 | # |
|---|---|---|---|---|
| 1900s | · | 9 | ||
| 1910s | · | · | ||
| 1930s | 42 | 63 | ||
| 1950s | · | · | ||
| 2000s | 120 | 172 | ||
| 2010s | 96 | 94 | ||
| 2020s | 108 | 28 |
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 1932, the latest in 2026. Period of observation: 1905-2026.
Records by month
| Month | Hottest day | Coldest day | Wettest day |
|---|---|---|---|
| January | 52.0°F — Jan 14, 2009 | -15.0°F — Jan 15, 1907 | 23.00 in — Jan 18, 1911 |
| February | 61.0°F — Feb 3, 2005 | -8.0°F — Feb 2, 1932 | 2.12 in — Feb 22, 2012 |
| March | 70.0°F — Mar 18, 2024 | -7.1°F — Mar 12, 2006 | 2.95 in — Mar 12, 2026 |
| April | 80.1°F — Apr 30, 2023 | 10.0°F — Apr 2, 1935 | 1.08 in — Apr 14, 2013 |
| May | 91.9°F — May 18, 2006 | 19.9°F — May 7, 2003 | 2.22 in — May 15, 2011 |
| June | 107.1°F — Jun 30, 2021 | 28.0°F — Jun 12, 1933 | 1.71 in — Jun 27, 1905 |
| July | 99.0°F — Jul 29, 2022 | 25.0°F — Jul 16, 2002 | 0.48 in — Jul 24, 2014 |
| August | 99.0°F — Aug 17, 2008 | 34.0°F — Aug 26, 1933 | 1.54 in — Aug 25, 2004 |
| September | 97.0°F — Sep 4, 2025 | 27.0°F — Sep 27, 2004 | 6.00 in — Sep 14, 1905 |
| October | 82.9°F — Oct 2, 2003 | 8.1°F — Oct 31, 2002 | 3.44 in — Oct 22, 2017 |
| November | 62.1°F — Nov 11, 1933 | -4.0°F — Nov 24, 2010 | 10.46 in — Nov 7, 2006 |
| December | 57.9°F — Dec 1, 2021 | -6.0°F — Dec 11, 1932 | 4.89 in — Dec 9, 2025 |
Click a month to see every daily record for that month in Roslyn.