San Ysidro, CA Weather Forecast and Current Conditions

Current Conditions From Nearby Local Station

Hazy 59°F
Feels Like 59°F  
Humidity 83% Dew Point 54°F Wind Calm Barometer 30.14 in.
Solar Rad 438 w/m2 Visibility 4 mi.
Report from a NOAA weather station 1.9 mi. NW of central San Ysidro
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Point Forecast at a Glance

MonDec 15
Mon Dec 15: Sunny, High 69F, Low 51F
69
51
TueDec 16
Tue Dec 16: Sunny, High 74F, Low 54F
74
54
WedDec 17
Wed Dec 17: Mostly Cloudy, High 74F, Low 55F
74
55
ThuDec 18
Thu Dec 18: Sunny, High 77F, Low 56F
77
56
FriDec 19
Fri Dec 19: Mostly Cloudy, High 77F, Low 54F
77
54
SatDec 20
Sat Dec 20: Mostly Cloudy, High 72F, Low 53F
72
53
SunDec 21
Sun Dec 21: Mostly Cloudy, High 71F
71
 

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7-Day Temperature Trend

Week Ahead Summary

High temperatures remain relatively stable through the week, ranging from 69°F to 77°F. Dry weather expected throughout the week.

Climate Context

This week's forecast shows temperatures running 8°F above the historical average for December. Normal highs for this period are around 65°F with lows around 43°F.

This Date in Weather History

1987 - A major winter storm hit the Great Lakes Region, intensifying explosively as it crossed northern Illinois. High winds and heavy snow created blizzard conditions in southeastern Wisconsin. Winds gusted to 73 mph, and snowfall totals ranged up to 17 inches at LaFarge. The barometric pressure at Chicago IL dropped three quarters of an inch in six hours to 28.96 inches, a record low reading for December. Up to a foot of snow blanketed northern Illinois, and winds in the Chicago area gusted to 75 mph. O'Hare Airport in Chicago was closed for several hours, for only the fourth time in twenty years. High winds derailed train cars at Avon IN. Light winds and partly sunny skies were reported near the center of the storm, a feature typical of tropical storms.

More on this and other weather history

San Ysidro, CA 7 Day Weather Forecast Details

Monday Dec 15

Sunny

Day: Sunny, with a high near 69. Northwest wind 5 to 10 mph.

Mostly Clear

Night: Mostly clear, with a low around 51. Calm wind becoming east around 5 mph in the evening.

Tuesday Dec 16

Sunny

Day: Sunny, with a high near 74. Light and variable wind becoming west 5 to 10 mph in the afternoon.

Partly Cloudy

Night: Patchy fog after 4am. Otherwise, partly cloudy, with a low around 54. Northwest wind around 5 mph becoming calm.

Wednesday Dec 17

Mostly Cloudy

Day: Patchy fog before 10am. Otherwise, sunny, with a high near 74. Light northwest wind increasing to 5 to 10 mph in the afternoon.

Mostly Clear

Night: Mostly clear, with a low around 55.

Thursday Dec 18

Sunny

Day: Sunny, with a high near 77.

Partly Cloudy

Night: Patchy fog after 10pm. Otherwise, mostly clear, with a low around 56.

Friday Dec 19

Mostly Cloudy

Day: Patchy fog before 10am. Otherwise, sunny, with a high near 77.

Partly Cloudy

Night: Patchy fog after 10pm. Otherwise, partly cloudy, with a low around 54.

Saturday Dec 20

Mostly Cloudy

Day: Patchy fog. Otherwise, mostly sunny, with a high near 72.

Partly Cloudy

Night: Patchy fog. Otherwise, partly cloudy, with a low around 53.

Sunday Dec 21

Mostly Cloudy

Day: Patchy fog. Otherwise, mostly sunny, with a high near 71.

How We Provide Better Local Weather

Current conditions: We use the nearest available station to your location - including professional MESONET/MADIS and local weather stations - often miles closer than regional airports.

Forecasts: National Weather Service point forecasts predict for your specific area, not broad regional zones, making them far more relevant to your location.