Chill hours in Wenatchee, Washington: the last 10 winters
Ten seasons of winter chill for Wenatchee, Washington (47.4235, -120.3103), calculated from NASA POWER hourly temperatures across 2016–17 to 2025–26. Instead of comparing winters yourself or hunting for the nearest weather station, the three standard models for fruit trees and berries are already worked out below.
How the last season compared
The 2025–26 season delivered 1128 chill hours, 204 above the ten-season average of 924. That is a difference of 22%. It was the third-highest of the ten seasons recorded here. Chill portions, which discount warm spells differently, came to 106.6 against a ten-season average of 94.3.
Ten-season average, low, and high
| Model | Average | Lowest season | Highest season |
|---|---|---|---|
| 45°F Hours Hours between 0 and 7.2°C (32–45°F). | 924.3 hours | 597.0 | 1243.0 |
| Utah Weighted bands; warm hours subtract from the total. | 468.1 units | 189.5 | 692.0 |
| Dynamic Fishman–Erez model; handles warm spells. | 94.3 portions | 69.5 | 118.5 |
45°F Hours and Utah are counted over 1 November – 28 February, following the UC Davis convention. Dynamic is counted over 1 September – 31 March.
Season by season
| Season | 45°F Hours | Utah units | Chill portions |
|---|---|---|---|
| 2016–17 | 674 | 455.5 | 81.2 |
| 2017–18 | 1033 | 435.0 | 103.9 |
| 2018–19 | 734 | 354.0 | 93.3 |
| 2019–20 | 1233 | 692.0 | 118.5 |
| 2020–21 | 969 | 490.5 | 97.9 |
| 2021–22 | 922 | 565.5 | 98.1 |
| 2022–23 | 710 | 235.5 | 69.5 |
| 2023–24 | 1243 | 647.0 | 102.7 |
| 2024–25 | 597 | 189.5 | 70.8 |
| 2025–26 | 1128 | 616.0 | 106.6 |
Which fruit varieties suit Wenatchee?
The 3 most chill-demanding varieties that still fit an average of 924 chill hours here.
| Variety | Species | Chill requirement |
|---|---|---|
| Belle of Georgia | Peach | 825 hours |
| Honeycrisp | Apple | 800 hours |
| Cortland | Apple | 800 hours |
Station data for Washington
NASA POWER is a grid estimate. For measured station data and local chill guidance, see Washington State University: the importance of chilling temperatures for fruit trees.
Nearby locations
- Yakima, Washington — 93 km
- Hood River, Oregon — 212 km
- Kelowna, British Columbia — 280 km
Track this season in ChillCast
ChillCast tracks this season's chill for Wenatchee, Washington on your iPhone and compares it with the ten-season average above.
Generated
This page was generated on 2026-09-06.
About this data
Values are NASA POWER regional estimates (about 0.5° grid), not orchard measurements. Check your local extension service for station data.
Source: NASA POWER hourly 2-metre air temperature (MERRA-2). NASA does not endorse ChillCast.