Valley Center, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

555
FXUS66 KSGX 091558
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
858 AM PDT Mon Jun 9 2025

.SYNOPSIS...
Shallower marine layer each morning through mid-week with well
above normal temperatures for inland areas and deserts, peaking
Tuesday and Wednesday. A slight cool down is expected for the end
of the week before temperatures increase again for the weekend.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

.UPDATE...
The marine layer was sufficiently deep this morning with some
locations across San Diego county experiencing light drizzle. The
marine layer will slowly lower and become more shallow in the
coming days as high pressure builds in. Temperatures along the
coast will only see a mild warm up while areas further inland, the
deserts, and Coachella Valley will be 5-10 degrees above normal
through mid week. Temperatures cool ever so slightly for the end
of the week before a return to warmer temperatures is expected for
the weekend.

&&

.PREVIOUS FORECAST FROM 320 AM...
.SHORT TERM (Today through Wednesday)...
A weak upper level low pressure system will move inland through
southern California today. High pressure to the southwest will
expand into southern California for Tuesday and Wednesday. A weak
low pressure system moving inland to the north will strengthen
the onshore flow slightly on Wednesday.

High temperatures will warm for today and Tuesday, then cool
slightly for Wednesday. High temperatures on Tuesday will be as
much as 5 to 10 degrees above average for the mountains, inland
valleys, and high desert. High temperatures on Tuesday will range
from around 70 near the coast to the mid 80s to mid 90s for the
Inland Empire with 105 to 110 for the lower deserts.

Through Tuesday, the marine layer will decrease in depth to around
1500 feet. Night and morning coastal low clouds will spread inland
into the western valleys with limited afternoon clearing near the
coast. The marine layer may begin to deepen slightly on Wednesday.

&&

.LONG TERM (Thursday through Sunday)...
The low pressure system moving inland to the north may weaken the
high pressure across southern California for Thursday and Friday
with a slow cooling trend. The marine layer will deepen to around
2000 feet with night and morning coastal low clouds spreading
farther inland into the valleys. With the cooling, high
temperatures on Friday will be mostly a few to around 5 degrees
above average, into the mid 80s to lower 90s for the Inland Empire
with 105 to 110 for the lower deserts.

For next weekend, onshore flow will begin to weaken with high
pressure to the south expanding into southern California. There
will be a warming trend for next weekend with high temperatures
for next Sunday 5 to 10 degrees above average for inland areas.
High temperatures for next Sunday for the Inland Empire will be
mostly in the 90s with 108 to 112 for the lower deserts. The
marine layer will become a little shallower, but with night and
morning coastal low clouds still spreading inland into the western
valleys.

&&

.AVIATION...
091515Z....Coast/Valleys...Low clouds with bases around 700-1200
feet MSL with tops to 1800 feet reached into the western and
southern parts of the Inland Empire. Bases will lift
and clouds will clear to the coast by 18-19Z, but with only partial
and/or intermittent clearing at immediate coast. Probability of
BKN-OVC clouds all day today at KSAN is around 80-90%. Clouds
will push inland after 01Z tonight into Tuesday, but not as far
inland as this morning. Bases would be around 500-1000 feet MSL with
some vis reduced over higher coastal terrain.

Mountains/Deserts...Mostly clear skies and unrestricted VIS today
and tonight.

&&

.MARINE...
No hazardous marine conditions are expected through Friday.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...None.
PZ...None.

&&

$$

PUBLIC...Zuber
AVIATION/MARINE...Small