CLIMATE DIVISION CA-1

North Coast Drainage

NOAA California climate division CA-1 — the whole measured record, 1895 to 2025.

DIVISION CA-1 CALIFORNIA

The record in brief

GENERATED FROM THE DIVISIONAL TABLE

North Coast Drainage is NOAA climate division CA-1. The north coast and the Klamath mountains, from Del Norte to Marin — where Pacific storms make landfall first, and the wettest division in the state.

Warming, 1895–2025: +1.98°F per century (95% interval ±0.52), statistically significant.
Warmest year: 2014, at 55.5°F.
Water-year normal, 1991–2020: 47.8 inches.
Wettest water year: 1983, 82.2 inches. Driest: 1924, 20.4 inches.
Precipitation trend: -0.6 inches per century, not distinguishable from zero.
ENSO correlation: r = 0.137 between the DJF Oceanic Niño Index and water-year precipitation, over 76 winters.

Temperature

ONE STRIPE PER YEAR, AND THE SERIES BENEATH IT

Precipitation

WATER YEARS, AS A PERCENT OF NORMAL

This division against the state

WHERE IT SITS

All seven divisions are side by side here. For the climate of individual places inside this division — named stations, with their elevations and distances — see the same division on Golden State Weather.