SAN YSIDRO, CA 92143 Weather Forecast & Current Conditions

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SAN DIEGO/BROWN, CA
Current Weather

8:53 PM PDT SEP 15, 2026
Clear
66°F
Feels Like: 66°F
Dewpoint: 59°F
Rel. Hum.: 78%
Visibility: 10 miles
Wind: Calm
Pressure: 29.94 inches
Last 72 hours

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SAN YSIDRO, CA 92143
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TONIGHT
Partly cloudy this evening, then mostly cloudy with patchy drizzle overnight. Lows 59 to 65. Light winds.
WEDNESDAY
Mostly cloudy with patchy drizzle in the morning, then partly cloudy in the afternoon. Highs 72 to 76 near the coast to 76 to 79 inland. Light winds becoming southwest 10 mph in the afternoon.
WEDNESDAY NIGHT
Partly cloudy. Lows 58 to 65. Light winds.
THURSDAY
Mostly cloudy in the morning...becoming mostly sunny. Highs 72 to 76 near the coast to 76 to 79 inland. Light winds becoming west 10 to 15 mph in the afternoon.
THURSDAY NIGHT
Mostly clear in the evening...becoming partly cloudy. Lows 57 to 64. Areas of winds northwest 10 mph in the evening becoming light.
FRIDAY
Partly cloudy in the morning...becoming mostly sunny. Highs 73 to 77 near the coast to 77 to 81 inland.
FRIDAY NIGHT
Mostly clear. Lows 58 to 64.
SATURDAY
Partly cloudy in the morning...becoming mostly sunny. Highs 74 to 78 near the coast to 78 to 82 inland.
SATURDAY NIGHT
Mostly clear in the evening...becoming partly cloudy. Lows 59 to 65.
SUNDAY
Partly cloudy. Highs 74 to 77 near the coast to 77 to 81 inland.
SUNDAY NIGHT
Partly cloudy. Lows 59 to 65.
MONDAY
Mostly cloudy in the morning...becoming partly cloudy. Highs 73 to 76 near the coast to 76 to 80 inland.
MONDAY NIGHT
Mostly clear in the evening...becoming partly cloudy. Lows 59 to 65.

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  6:00 AM MDT  9/15/2026
Tuesday
15 SEP 2026
SAN YSIDRO, CA 92143 weather forecast Day 1, 12 hours 11 AM 74° 74° Partly Cloudy 1%

0% Thunder
( 0% severe)
SW   8 69% 63°
High 76° SAN YSIDRO, CA 92143 weather forecast Day 1, 15 hours 2 PM 75° 75° Partly Cloudy WSW   12 66% 63°
Partly Cloudy



SAN YSIDRO, CA 92143 weather forecast Day 1, 18 hours 5 PM 73° 73° Partly Cloudy 5%

0% Thunder
( 0% severe)
SW   10 73% 64°
SAN YSIDRO, CA 92143 weather forecast Day 1, 21 hours 8 PM 67° 67° Partly Cloudy SW   3 87% 63°
Wednesday
16 SEP 2026
SAN YSIDRO, CA 92143 weather forecast Day 2, 0 hours 11 PM 65° 65° Partly Cloudy 1%

0% Thunder
( 0% severe)
SSW   3 90% 62°
Low 63° SAN YSIDRO, CA 92143 weather forecast Day 2, 3 hours 2 AM 65° 65° Mostly Cloudy S   3 90% 62°
High 75° SAN YSIDRO, CA 92143 weather forecast Day 2, 6 hours 5 AM 64° 65° Mostly Cloudy 2%

0% Thunder
( 0% severe)
S   3 93% 62°

Mostly Cloudy



SAN YSIDRO, CA 92143 weather forecast Day 2, 9 hours 8 AM 65° 65° Mostly Cloudy S   5 93% 63°
SAN YSIDRO, CA 92143 weather forecast Day 2, 12 hours 11 AM 72° 72° Partly Cloudy 0%

0% Thunder
( 0% severe)
SW   6 71% 62°
SAN YSIDRO, CA 92143 weather forecast Day 2, 15 hours 2 PM 74° 74° Partly Cloudy WSW   12 66% 62°
SAN YSIDRO, CA 92143 weather forecast Day 2, 18 hours 5 PM 72° 72° Partly Cloudy 3%

0% Thunder
( 0% severe)
W   10 73% 63°
SAN YSIDRO, CA 92143 weather forecast Day 2, 21 hours 8 PM 66° 66° Partly Cloudy W   5 90% 63°
Thursday
17 SEP 2026
SAN YSIDRO, CA 92143 weather forecast Day 3, 0 hours 11 PM 64° 65° Partly Cloudy 5%

0% Thunder
( 0% severe)
W   3 93% 62°
Low 63° SAN YSIDRO, CA 92143 weather forecast Day 3, 3 hours 2 AM 64° 65° Mostly Cloudy NE   3 93% 62°
High 76° SAN YSIDRO, CA 92143 weather forecast Day 3, 6 hours 5 AM 63° 64° Mostly Cloudy 0%

0% Thunder
( 0% severe)
ENE   3 97% 62°

Decreasing Clouds



SAN YSIDRO, CA 92143 weather forecast Day 3, 9 hours 8 AM 65° 65° Partly Cloudy NE   5 93% 63°
SAN YSIDRO, CA 92143 weather forecast Day 3, 15 hours 11 AM 73° 73° Clear 0%

0% Thunder
( 0% severe)
W   6 66% 61°
SAN YSIDRO, CA 92143 weather forecast Day 3, 18 hours 2 PM 74° 74° Clear W   12 66% 62°
SAN YSIDRO, CA 92143 weather forecast Day 3, 21 hours 5 PM 72° 72° Clear     WNW   12 76% 64°

SAN DIEGO/BROWN, CA extended weather forecast

Friday
18 SEP 2026
Saturday
19 SEP 2026
Sunday
20 SEP 2026
Monday
21 SEP 2026
Tuesday
22 SEP 2026
Low 59° Low 60° Low 61° Low 62° Low 60°
High 78° High 79° High 79° High 76° High 76°
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
Mostly Cloudy
4% Rain
Partly Cloudy
2% Rain
Mostly Cloudy
3% Rain
Mostly Cloudy
5% Rain
Partly Cloudy
6% Rain
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