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 8b: 15F to 20F | |
Average First Frost Date: | Nov. 21 - Nov. 30 | |
Average Last Frost Date: | Mar. 11 - Mar. 20 | |
Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate | |
Ecoregion: | 3c - Prairie Terraces | |
Current Drought Status: | Exceptional Drought | |
Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 97035 - Lake Oswego, OR | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | |
Avg Min Temp (°F) | 34 | 36 | 38 | 41 | 46 | 51 | 55 | 55 | 51 | 44 | 39 | 35 | 44 |
Avg Max Temp (°F) | 46 | 51 | 56 | 61 | 68 | 73 | 80 | 81 | 75 | 64 | 52 | 46 | 63 |
Avg Precip (In.) | 6.09 | 5 | 4.28 | 2.95 | 2.4 | 1.67 | .67 | .88 | 1.74 | 3.19 | 6.29 | 6.64 | 41.8 |