| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 8a: 10°F to 15°F |
| 2012 Hardiness Zone: | Zone 8a: 10°F to 15°F |
| 1990 Hardiness Zone: | Zone 7b: 5F to 10F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate |
| Ecoregion: | 2g - Southern Puget Prairies |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 98501 - Olympia, WA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 32 | 33 | 35 | 37 | 42 | 47 | 50 | 50 | 45 | 39 | 36 | 32 | 40 |
| Avg Max Temp (°F) | 44 | 49 | 53 | 59 | 65 | 70 | 76 | 77 | 72 | 60 | 50 | 44 | 60 |
| Avg Precip (In.) | 7.53 | 6.17 | 5.29 | 3.57 | 2.3 | 1.79 | .84 | 1.16 | 2.04 | 4.21 | 8.1 | 7.94 | 50.91 |