| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 9a: 20°F to 25°F | |
| 2012 Hardiness Zone: | Zone 8b: 15°F to 20°F | |
| 1990 Hardiness Zone: | Zone 8a: 10F to 15F | |
| Average First Frost Date: | November 1 - 10 | |
| Average Last Frost Date: | April 1 - 10 | |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate | |
| Ecoregion: | 2f - Central Puget Lowland | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 98359 - Olalla, WA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 35 | 36 | 38 | 41 | 46 | 51 | 54 | 54 | 50 | 44 | 39 | 35 | 44 |
| Avg Max Temp (°F) | 46 | 50 | 54 | 59 | 65 | 70 | 76 | 76 | 71 | 61 | 51 | 46 | 60 |
| Avg Precip (In.) | 6.62 | 5.67 | 5.01 | 3.16 | 2.1 | 1.67 | .94 | 1.12 | 1.86 | 3.93 | 7.31 | 7.48 | 46.86 |