SAN YSIDRO, CA 92143 Weather Forecast & Current Conditions

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SAN DIEGO/BROWN, CA
Current Weather

9:53 AM PDT MAR 9, 2026
Overcast
57°F
Feels Like: 57°F
Dewpoint: 52°F
Rel. Hum.: 83%
Visibility: 10 miles
Wind: Calm
Pressure: 29.93 inches
Last 72 hours

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SAN YSIDRO, CA 92143
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TODAY
Partly cloudy. A slight chance of showers this afternoon. Cooler. Highs 65 to 68 near the coast to 70 inland. Areas of winds south to 10 mph. Chance of measurable precipitation 20 percent.
TONIGHT
Partly cloudy. Lows 48 to 53. Areas of winds southwest to 10 mph in the evening becoming light.
TUESDAY
Partly cloudy in the morning...becoming mostly sunny. Highs 65 to 68 near the coast to 70 inland. Light winds becoming west 10 mph in the afternoon.
TUESDAY NIGHT
Mostly clear in the evening...becoming partly cloudy. Lows 47 to 52. Areas of winds west to 10 mph in the evening becoming light.
WEDNESDAY
Partly cloudy in the morning...becoming sunny. Highs 69 to 74 near the coast to 76 to 79 inland. Light winds becoming northwest 10 mph in the afternoon.
WEDNESDAY NIGHT
Clear. Lows 52 to 57.
THURSDAY
Sunny, warmer. Highs 82 to 87 near the coast to 90 to 94 inland.
THURSDAY NIGHT
Mostly clear. Lows 57 to 62.
FRIDAY
Mostly sunny. Highs 82 to 87 near the coast to 91 to 95 inland.
FRIDAY NIGHT
Mostly clear. Lows 55 to 60.
SATURDAY
Mostly sunny. Highs 77 to 82 near the coast to 85 to 89 inland.
SATURDAY NIGHT
Partly cloudy. Patchy fog overnight. Lows 52 to 57.
SUNDAY
Partly cloudy with patchy fog in the morning...becoming mostly sunny. Highs 74 to 79 near the coast to 83 to 86 inland.

Visible Weather Satellite
SAN YSIDRO, CA 92143
Infrared Weather Satellite
SAN YSIDRO, CA 92143
NEXRAD Weather Radar
SAN YSIDRO, CA 92143

SAN DIEGO/BROWN, CA 3 hourly weather forecast

weather forecast created  5:00 AM MST  3/ 9/2026
Monday
9 MAR 2026
SAN YSIDRO, CA 92143 weather forecast Day 1, 12 hours 10 AM 64° 65° Partly Cloudy 16%
RAIN
.25–.5 in
0% Thunder
( 3% severe)
WSW   5 60% 50°
High 67° SAN YSIDRO, CA 92143 weather forecast Day 1, 15 hours 1 PM 66° 66° Partly Cloudy W   12 58% 51°
Partly Cloudy



SAN YSIDRO, CA 92143 weather forecast Day 1, 18 hours 4 PM 64° 63° Partly Cloudy 4%

0% Thunder
( 0% severe)
W   10 65% 52°
SAN YSIDRO, CA 92143 weather forecast Day 1, 21 hours 7 PM 59° 59° Partly Cloudy WNW   5 80% 53°
Tuesday
10 MAR 2026
SAN YSIDRO, CA 92143 weather forecast Day 2, 0 hours 10 PM 57° 58° Partly Cloudy 1%

0% Thunder
( 0% severe)
N   2 86% 53°
Low 52° SAN YSIDRO, CA 92143 weather forecast Day 2, 3 hours 1 AM 55° 55° Partly Cloudy N   2 93% 53°
High 68° SAN YSIDRO, CA 92143 weather forecast Day 2, 6 hours 4 AM 53° 53° Partly Cloudy 1%

0% Thunder
( 0% severe)
SE   2 96% 52°

Partly Cloudy



SAN YSIDRO, CA 92143 weather forecast Day 2, 9 hours 7 AM 54° 54° Partly Cloudy ESE   2 100% 54°
SAN YSIDRO, CA 92143 weather forecast Day 2, 12 hours 10 AM 64° 65° Clear 1%

0% Thunder
( 0% severe)
W   5 67% 53°
SAN YSIDRO, CA 92143 weather forecast Day 2, 15 hours 1 PM 67° 67° Clear W   10 65% 55°
SAN YSIDRO, CA 92143 weather forecast Day 2, 18 hours 4 PM 64° 64° Partly Cloudy 1%

0% Thunder
( 0% severe)
W   9 70% 54°
SAN YSIDRO, CA 92143 weather forecast Day 2, 21 hours 7 PM 59° 60° Partly Cloudy W   3 87% 55°
Wednesday
11 MAR 2026
SAN YSIDRO, CA 92143 weather forecast Day 3, 0 hours 10 PM 57° 58° Partly Cloudy 0%

0% Thunder
( 0% severe)
SW   2 90% 54°
Low 52° SAN YSIDRO, CA 92143 weather forecast Day 3, 3 hours 1 AM 54° 54° Mostly Cloudy NE   1 100% 54°
High 74° SAN YSIDRO, CA 92143 weather forecast Day 3, 6 hours 4 AM 52° 52° Partly Cloudy 0%

0% Thunder
( 0% severe)
ENE   2 100% 52°

Partly Cloudy



SAN YSIDRO, CA 92143 weather forecast Day 3, 9 hours 7 AM 53° 53° Partly Cloudy NE   2 96% 52°
SAN YSIDRO, CA 92143 weather forecast Day 3, 15 hours 10 AM 67° 67° Clear 0%

0% Thunder
( 0% severe)
NW   5 59% 52°
SAN YSIDRO, CA 92143 weather forecast Day 3, 18 hours 1 PM 72° 72° Clear WNW   10 53% 54°
SAN YSIDRO, CA 92143 weather forecast Day 3, 21 hours 4 PM 70° 70° Clear     WNW   9 57% 54°

SAN DIEGO/BROWN, CA extended weather forecast

Thursday
12 MAR 2026
Friday
13 MAR 2026
Saturday
14 MAR 2026
Sunday
15 MAR 2026
Monday
16 MAR 2026
Low 51° Low 54° Low 51° Low 50° Low 52°
High 86° High 86° High 79° High 79° High 79°
SAN YSIDRO, CA 92143 weather forecast Day 4 SAN YSIDRO, CA 92143 weather forecast Day 5 SAN YSIDRO, CA 92143 weather forecast Day 6 SAN YSIDRO, CA 92143 weather forecast Day 7 <!--SEARCHED_TOWN_NAME--> weather forecast Day 8
Clear
2% Rain
Clear
2% Rain
Partly Cloudy
5% Rain
Mostly Cloudy
6% Rain
Clear
3% Rain
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