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Rancho San Joaquin, Irvine, CA 92612
Weather Conditions Updated at 2:16pm on 5/12/21
Sky Temperature (°F) Wind 

Visibility 7 mi.


Temp Rate °/hr.
24-hr. Change °

Max Gust 7 mph
High Temperature 73° (2:15pm)
Low Temperature 64° (3:58am)

Dew Point

Wet Bulb Temperature
Rainfall Since Midnight

24-hour Change
30.01 in. 

Cloud Base ft.
Density Altitude
Pressure Altitude
Vapor Pressure 0.54 in.
Virtual Temperature 77°

Coastal Orange County Forecast

Meteoblue NowcastMarine ForecastArea Forecast Discussion

National Temperature Extremes

Tuesday, Contiguous 48 United States
at Rio Grande Village, TX Low: at Vernal 37NW, UT  

Temperature Converter

Enter temperature in either box and press [TAB].

°F  °C

Station Statistics

Station Location and Elevation
Rancho San Joaquin, Irvine, CA  92612
Latitude: 33.663, Longitude: -117.830
Elevation: 72 Feet Above Sea Level

Station Temperature and Wind Extremes
This Month's High Temp (5/4/21)
This Month's Low Temp (5/11/21)
This Month's Peak Wind Gust mph (5/2/21)

This Year's High Temp (1/15/21)
This Year's Low Temp (1/26/21)
This Year's Peak Wind Gust: mph (1/25/21)

Record High Temp* (7/6/18)
Record Low Temp* (1/14/07)
Record Wind Gust* 47 mph (1/16/08)
Record Low Pressure*: 29.08 in. (1/21/10)
*Record for Since 3/1/2004

Solar Activity

Solar X-rays:  
Geomagnetic Field:  

Courtesy of n3kl.orgMt. Wilson Solar Tower Home Page
U.S. Current Conditions

Current U.S. Temperatures
Moon Phase

Heating° Days (Current) 0
Monthly Heating° Days (To Date): 21
Yearly Heating° Days (To Date) 942
Cooling° Days (Current) 1
Monthly Cooling° Days (To Date) 18
Yearly Cooling° Days (To Date) 179
Wind Run (Current)  1.90 mi.
Wind Run Monthly (To Date) 43.74 mi.
Wind Run Yearly (To Date) 1256.65 mi.
Rainfall Sentinel
Last Measurable Rainfall
Monthly Rainfall (To Date)
Annual Rainfall (To Date)*
Last Year's Annual Rainfall* 10.67 in.
Normal Annual Rainfall* 13.33 in.
*Annual Rainfall is based on the California Water Year,
  which runs from October 1 through September 30.

Regional Observations

Weather Trend Graphs


Area Forecast Discussion
FXUS66 KSGX 121558

Area Forecast Discussion
National Weather Service San Diego CA
855 AM PDT Wed May 12 2021

Weak high pressure aloft will bring seasonal May Gray weather west 
of the mountains through Thursday. The mountains will be warm both 
today and tomorrow, and it will be hot in the deserts. A trough of 
low pressure moving into the area this weekend will bring cooler 
weather, a much deeper marine layer, and a chance for showers west 
of the mountains Saturday night and Sunday morning. Strong west 
winds will impact the mountains and deserts.



Cloud bases this morning were around 1,200 ft MSL, 400 feet lower 
than Tuesday morning. The inversion strength remains strong, still 
at 8C on the 12Z NKX sounding, so like yesterday the marine layer 
clouds will slowly dissipate back to the coast through early 
afternoon. Scattered to broken low clouds may linger a few of the 
beaches through the afternoon. 

No changes to the forecast this morning. We are evaluating the 
strength of the trough that will impact SoCal this weekend, with a 
focus on the precipitation chances and amounts west of the 
mountains Saturday night and Sunday morning. 

*From Previous Discussion*

The warming trend will continue today with high temperatures 5 to
locally 10 degrees above average for the deserts, mountains, and
inland valleys. The marine layer will keep high temperatures 
slightly below average for coastal areas into the western San 
Diego County valleys. Inland areas may warm another degree or two
on Thursday while the valleys begin to cool. 

Cooling will begin to spread inland on Friday as a weak low 
pressure system approaches the west coast. The marine layer will 
begin to slowly deepen with coastal low clouds spreading a little 
farther into the inland valleys for Friday morning.


.LONG TERM (Saturday through Tuesday)...
A low pressure system from the northwest will move slowly
southeastward across California during the weekend. This will
strengthen the onshore flow and deepen the marine layer with a
cooling trend continuing through Sunday. 

The coastal low clouds should cover most of the valleys for 
Saturday and extend onto the coastal mountain slopes for Sunday 
morning. There is the potential for a period of more rapid and 
substantial deepening of the marine layer for Saturday night into 
Sunday morning with the marine layer deepening to around 6000 
feet. There remains the potential for some drizzle or light rain 
from this deeper marine layer for late Saturday night into Sunday 
morning inland to the coastal slopes of the mountains. 

With the cooling during the weekend, high temperatures on Sunday
will be around 5 degrees below average at lower elevations to 10 
to 15 degrees below average in some of the mountain and inland 
valley locations. With the stronger onshore flow, there will be 
periods of stronger and gusty southwest to west winds in the 
mountains and deserts for Saturday into Sunday with the stronger 
gusts in the windier locations to around 45 mph.

For early next week, the low pressure system will move east with 
warming for Monday and Tuesday. The marine layer will begin to
decrease in depth, but still be deep enough for the night and 
morning coastal low clouds and fog to cover much of the valleys. 


121540Z...Coast/Valleys...Low clouds are covering much of the 
coastal basin this morning with bases 1000-1700 FT MSL and tops 2000-
2500 FT MSL. Reduced vis where low clouds intersect terrain. Low 
clouds to scatter out 16-17z across inland valleys, and 17-19z near 
most coastal areas, though some locations may not fully clear. 
Widespread low clouds will redevelop 01-03z Thu, with similar 
coverage and bases.

Mountains/Deserts...Mostly clear with unrestricted vis today and 


No hazardous marine weather is expected through Sunday.


Skywarn activation will not be needed through Friday. 






© (rev. 2021_03032309)
Conditions Updated once per minute.
Page will automatically refresh every five minutes.
All temperatures and dew points are in degrees Fahrenheit.

Weather Hardware by Davis Instruments
Weather Software by Ambient Weather, augmented by WeatherDisplay


Radar courtesy of NWS and WUnderground
Satellite courtesy of NWS
Current conditions map courtesy of WUnderground
Current Temperatures map courtesy of WeatherCentral
Local Forecast courtesy of
Wind direction image courtesy of Long Beach, WA Weather
Regional Observations courtesy of

(You knew this was coming!) Never base important decisions on this or any weather information obtained from the Internet.
This site reports weather observed at the Rancho San Joaquin village of Irvine, California.
We are not affilliated with the Rancho San Joaquin Golf Course, the Rancho San Joaquin Homeowner's Association
nor the Rancho San Joaquin Apartments.
So there!

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