Bakersfield, California / Pistachio
Total Chill:
54
(Feb 28)
Day 119 / 151 (79%)
Current Season
Total Chill:
54
(Feb 28)
Method: Dynamic/Portions Model
Season: Nov 01, 25 - Mar 31, 2026
Key Freeze Dates (32°F)
Last Freeze:
10%: 01-08
50%: 02-07
90%: 02-26
10%: 01-08
50%: 02-07
90%: 02-26
First Freeze:
10%: 11-29
50%: 12-10
90%: 12-24
10%: 11-29
50%: 12-10
90%: 12-24
Chill accumulation tracks the cold exposure needed for dormant fruit trees and plants to break dormancy and bloom properly in spring.
Thresholds mark specific chill values when dormancy requirements are typically met, with crossing dates showing when your season reaches each milestone.
Thresholds & Notes
Accumulation Begins
10
Chill Hours
Dec 3, 2025
|
Dec 5, 2024
|
Dec 12, 2023
|
Nov 24, 2022
Latest chill start in Central Valley. Tule fog critical for San Joaquin Valley orchards.
Mid-Accumulation
25
Chill Hours
Dec 26, 2025
|
Jan 2, 2025
|
Jan 11, 2024
|
Dec 19, 2022
Deep dormancy. Apply dormant zinc sulfate sprays before budbreak.
Minimum Requirement Met
50
Chill Hours
Feb 12, 2026
|
Feb 18, 2025
|
Feb 2, 2023
Kerman base satisfied. Insufficient chill causes blanking and poor nut fill.
Chill Season Complete
53
Chill Hours
Feb 20, 2026
|
Mar 5, 2025
|
Feb 8, 2023
Male bloom precedes female 5-7 days. Monitor catkins for pollination timing.