SAN YSIDRO, CA 92143 Weather Forecast & Current Conditions

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SAN DIEGO/BROWN, CA
Current Weather

9:53 PM PST JAN 20, 2026
Fog
48°F
Feels Like: 45°F
Dewpoint: 48°F
Rel. Hum.: 100%
Visibility: M1/4 miles
Wind: ENE at 6 mph
Pressure: 30.06 inches
Last 72 hours

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SAN YSIDRO, CA 92143
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TONIGHT
Partly cloudy overnight. Areas of fog overnight. Local visibility one quarter mile or less at times overnight. Lows 47 to 51. Light winds.
WEDNESDAY
Areas of fog in the morning. Partly cloudy. Local visibility one quarter mile or less at times in the morning. Highs 65 to 70. Light winds.
WEDNESDAY NIGHT
Mostly cloudy. Patchy fog overnight. Lows 49 to 53. Light winds.
THURSDAY
Mostly cloudy with patchy fog in the morning... Becoming partly cloudy. A slight chance of showers. Highs 63 to 66. Light winds. Chance of measurable precipitation 20 percent.
THURSDAY NIGHT
Mostly cloudy with a chance of showers. Lows 49 to 54. Light winds. Chance of measurable precipitation 40 percent.
FRIDAY
Cloudy in the morning...becoming partly cloudy. A chance of showers. Highs 61 to 64.
FRIDAY NIGHT
Partly cloudy with a slight chance of showers. Lows 48 to 52.
SATURDAY
Mostly cloudy with a slight chance of showers in the morning, then partly cloudy in the afternoon. Highs 62 to 65.
SATURDAY NIGHT
Mostly clear in the evening...becoming partly cloudy. Lows 44 to 48.
SUNDAY
Mostly sunny. Highs 66 to 69.
SUNDAY NIGHT
Mostly clear in the evening...becoming partly cloudy. Lows 44 to 47.
MONDAY
Partly cloudy. Highs 66 to 69 near the coast to 70 inland.
MONDAY NIGHT
Partly cloudy. Lows 44 to 48.

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 PM MST  1/20/2026
Wednesday
21 JAN 2026
SAN YSIDRO, CA 92143 weather forecast Day 1, 0 hours 10 PM 55° 55° Partly Cloudy 0%

0% Thunder
( 0% severe)
E   3 77% 48°
Low 49° SAN YSIDRO, CA 92143 weather forecast Day 1, 3 hours 1 AM 53° 53° Mostly Cloudy NNW   3 77% 46°
High 69° SAN YSIDRO, CA 92143 weather forecast Day 1, 6 hours 4 AM 51° 50° Mostly Cloudy 0%

0% Thunder
( 0% severe)
E   3 71% 42°

Mostly Cloudy



SAN YSIDRO, CA 92143 weather forecast Day 1, 9 hours 7 AM 50° 50° Mostly Cloudy E   2 71% 41°
SAN YSIDRO, CA 92143 weather forecast Day 1, 12 hours 10 AM 62° 63° Mostly Cloudy 0%

0% Thunder
( 0% severe)
SW   2 48% 42°
SAN YSIDRO, CA 92143 weather forecast Day 1, 15 hours 1 PM 66° 66° Mostly Cloudy W   7 54% 49°
SAN YSIDRO, CA 92143 weather forecast Day 1, 18 hours 4 PM 63° 63° Mostly Cloudy 1%

0% Thunder
( 0% severe)
W   6 67% 52°
SAN YSIDRO, CA 92143 weather forecast Day 1, 21 hours 7 PM 58° 59° Mostly Cloudy NNW   2 87% 54°
Thursday
22 JAN 2026
SAN YSIDRO, CA 92143 weather forecast Day 2, 0 hours 10 PM 56° 56° Mostly Cloudy 2%

0% Thunder
( 0% severe)
E   2 86% 52°
Low 52° SAN YSIDRO, CA 92143 weather forecast Day 2, 3 hours 1 AM 54° 54° Mostly Cloudy SW   2 93% 52°
High 66° SAN YSIDRO, CA 92143 weather forecast Day 2, 6 hours 4 AM 53° 53° Mostly Cloudy 6%

0% Thunder
( 2% severe)
E   2 93% 51°

Mostly Cloudy



SAN YSIDRO, CA 92143 weather forecast Day 2, 9 hours 7 AM 52° 52° Mostly Cloudy ESE   2 89% 49°
SAN YSIDRO, CA 92143 weather forecast Day 2, 12 hours 10 AM 61° 62° Mostly Cloudy 8%

0% Thunder
( 2% severe)
W   3 70% 51°
SAN YSIDRO, CA 92143 weather forecast Day 2, 15 hours 1 PM 64° 64° Mostly Cloudy W   8 65% 52°
SAN YSIDRO, CA 92143 weather forecast Day 2, 18 hours 4 PM 62° 62° Mostly Cloudy 19%
RAIN
<.01 in
0% Thunder
( 2% severe)
W   7 75% 54°
SAN YSIDRO, CA 92143 weather forecast Day 2, 21 hours 7 PM 58° 58° Mostly Cloudy W   3 83% 53°

SAN DIEGO/BROWN, CA extended weather forecast

Friday
23 JAN 2026
Saturday
24 JAN 2026
Sunday
25 JAN 2026
Monday
26 JAN 2026
Tuesday
27 JAN 2026
Low 53° Low 52° Low 44° Low 43° Low 43°
High 65° High 65° High 69° High 70° High 69°
SAN YSIDRO, CA 92143 weather forecast Day 3 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
Overcast
19% Rain
Overcast
60% Rain
Partly Cloudy
26% Rain
Clear
6% Rain
Clear
5% Rain
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