SAN YSIDRO, CA 92143 Weather Forecast & Current Conditions

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SAN DIEGO/BROWN, CA
Current Weather

8:53 PM PST DEC 18, 2025
Clear
55°F
Feels Like: 55°F
Dewpoint: 54°F
Rel. Hum.: 96%
Visibility: 8 miles
Wind: Calm
Pressure: 29.98 inches
Last 72 hours

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SAN YSIDRO, CA 92143
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TONIGHT
Partly cloudy. Patchy fog overnight. Local visibility one quarter mile or less at times overnight. Lows 51 to 55. Light winds.
FRIDAY
Partly cloudy with patchy fog in the morning...becoming mostly sunny. Local visibility one quarter mile or less at times in the morning. Highs 66 to 71 near the coast to 71 to 75 inland. Light winds.
FRIDAY NIGHT
Partly cloudy. Patchy fog overnight. Lows 48 to 53. Light winds.
SATURDAY
Mostly cloudy with patchy fog in the morning... Becoming partly cloudy. Highs 64 to 68 near the coast to 70 inland. Light winds.
SATURDAY NIGHT
Partly cloudy. Patchy fog overnight. Lows 50 to 54. Light winds.
SUNDAY
Mostly cloudy with patchy fog in the morning...becoming partly cloudy. Highs 66 to 70 near the coast to 70 to 74 inland.
SUNDAY NIGHT
Partly cloudy in the evening...becoming mostly cloudy. Lows 50 to 54.
MONDAY
Mostly cloudy in the morning...becoming partly cloudy. Highs 65 to 69 near the coast to 69 to 72 inland.
MONDAY NIGHT
Clear. Lows 49 to 54.
TUESDAY
Mostly sunny in the morning, then partly cloudy with a chance of showers in the afternoon. Highs 65 to 69.
TUESDAY NIGHT
Showers likely. Lows 52 to 57.
WEDNESDAY
Showers. Locally heavy rainfall possible. Highs 64 to 68.
WEDNESDAY NIGHT
Showers. Lows 53 to 57.

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 12/18/2025
Friday
19 DEC 2025
SAN YSIDRO, CA 92143 weather forecast Day 1, 0 hours 10 PM 58° 58° Partly Cloudy 0%

0% Thunder
( 0% severe)
NE   3 77% 51°
Low 53° SAN YSIDRO, CA 92143 weather forecast Day 1, 3 hours 1 AM 57° 57° Partly Cloudy ESE   3 72% 48°
High 73° SAN YSIDRO, CA 92143 weather forecast Day 1, 6 hours 4 AM 55° 55° Clear 0%

0% Thunder
( 0% severe)
NE   3 72% 46°

Clear



SAN YSIDRO, CA 92143 weather forecast Day 1, 9 hours 7 AM 54° 54° Clear ESE   2 69% 44°
SAN YSIDRO, CA 92143 weather forecast Day 1, 12 hours 10 AM 68° 68° Clear 0%

0% Thunder
( 0% severe)
WSW   2 49% 48°
SAN YSIDRO, CA 92143 weather forecast Day 1, 15 hours 1 PM 71° 71° Clear W   7 53% 53°
SAN YSIDRO, CA 92143 weather forecast Day 1, 18 hours 4 PM 67° 67° Clear 0%

0% Thunder
( 0% severe)
W   5 65% 55°
SAN YSIDRO, CA 92143 weather forecast Day 1, 21 hours 7 PM 58° 59° Partly Cloudy W   2 90% 55°
Saturday
20 DEC 2025
SAN YSIDRO, CA 92143 weather forecast Day 2, 0 hours 10 PM 56° 56° Mostly Cloudy 0%

0% Thunder
( 0% severe)
S   2 90% 53°
Low 50° SAN YSIDRO, CA 92143 weather forecast Day 2, 3 hours 1 AM 54° 54° Mostly Cloudy SE   2 93% 52°
High 68° SAN YSIDRO, CA 92143 weather forecast Day 2, 6 hours 4 AM 52° 52° Mostly Cloudy 0%

0% Thunder
( 0% severe)
E   2 93% 50°

Mostly Cloudy



SAN YSIDRO, CA 92143 weather forecast Day 2, 9 hours 7 AM 50° 50° Mostly Cloudy ESE   2 93% 48°
SAN YSIDRO, CA 92143 weather forecast Day 2, 12 hours 10 AM 62° 63° Partly Cloudy 0%

0% Thunder
( 0% severe)
WSW   3 65% 50°
SAN YSIDRO, CA 92143 weather forecast Day 2, 15 hours 1 PM 66° 66° Partly Cloudy W   7 68% 55°
SAN YSIDRO, CA 92143 weather forecast Day 2, 18 hours 4 PM 63° 63° Partly Cloudy 0%

0% Thunder
( 0% severe)
W   6 78% 56°
SAN YSIDRO, CA 92143 weather forecast Day 2, 21 hours 7 PM 58° 59° Partly Cloudy W   1 90% 55°

SAN DIEGO/BROWN, CA extended weather forecast

BAD DAY
BAD DATE
BAD DAY
BAD DATE
BAD DAY
BAD DATE
BAD DAY
BAD DATE
BAD DAY
BAD DATE
Low 52° Low 52° Low 51° Low 53° Low 50°
High 79° High 70° High 74° High 73° High 67°
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
Partly Cloudy
1% Rain
Overcast
5% Rain
Overcast
9% Rain
Mostly Cloudy
10% Rain
Overcast
17% Rain
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