When Does Spring Start in California? It Depends on Where You Are
California's extreme elevation range (–86 m Badwater to 4,421 m Whitney) means spring arrives on a rolling schedule.
By Region
| Region | Spring Onset | Indicators |
|---|
| Coastal (SF, LA, SD) | Late Feb – Early Mar | Wildflowers, whales, citrus bloom |
| Central Valley | Early – Mid Mar | Almond blossoms, grass green-up |
| Foothills (Sierra/Coast Range) | Mid Mar – Apr | Poppies, lupine, redbud |
| High Sierra / Cascades | Apr – May (or June) | Snowmelt, alpine flowers, waterfalls peak |
| Deserts (Mojave, Colorado) | Feb – Mar (if rain) | Superbloom years: epic wildflowers |
Astronomical vs. Phenological
- Equinox (Mar 19–21): Official calendar spring.
- Phenological: First bloom, leaf-out, bird arrival — varies yearly.
Climate Change Trend
Spring advancing 1–2 weeks earlier since 1980s (USA-NPN data). Earlier snowmelt, longer fire season, mismatched pollinator timing.
Wanderlust World