Foothill Ranch, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

072
FXUS66 KSGX 161048
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
348 AM PDT Thu Oct 16 2025

.SYNOPSIS...
With high pressure aloft and weak offshore flow, it will be drier
with a warming trend through Saturday with not much change for
Sunday. High pressure will weaken some early next week with
Monday and Tuesday a few degrees cooler. A low pressure system
from the southwest may move into the area around the middle of
next week with another 5 or so degrees of cooling and a slight
chance of showers.

&&

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

.SHORT TERM (Today through Saturday)...
For Friday and Saturday, high pressure from the eastern Pacific
will spread across California with a developing low pressure
system well to the southwest of the area becoming cut off.
There will be a warming trend into the weekend. There will be
weak offshore lower level flow as well with northerly winds gusts
near the coastal slopes of the mountains mostly 35 mph or less.

High temperatures for today will be as much as 10 to 15 degrees
warmer than Wednesday for the inland valleys onto the coastal
slopes of the mountains. There will be a few more degrees of
warming on Friday and another few degrees of warming on Saturday.
With the warming, high temperatures on Saturday for the coast and
valleys will be a few to around 5 degrees above average with the
deserts into the mountains a few to around 5 degrees below
average. High temperatures on Saturday will range from the lower
to mid 70s near the coast to the lower to mid 80s for the Inland
Empire with the mid to upper 80s for the lower deserts.

&&

.LONG TERM (Sunday through Wednesday)...
On Sunday, the mountains and deserts will continue to warm a few
more degrees with slight cooling for the coast and valleys. That
low pressure system well to the southwest of the area may move
inland through southern California around Wednesday of next week.
Monday and Tuesday may be a few degrees cooler with another 5
degrees or so of cooling.

&&

.AVIATION...
160930Z....Clear and VFR conditions today and tonight.

&&

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

&&

.SKYWARN...
Skywarn activation is not requested. However weather spotters are
encouraged to report significant weather conditions.


&&

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

&&

$$

PUBLIC...17
AVIATION/MARINE...MM