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Rancho San Joaquin, Irvine, CA 92612
Weather Conditions Updated at 2:30pm on 11/25/20
Sky Temperature (°F) Wind 

Visibility 7 mi.


Temp Rate °/hr.
24-hr. Change °

Max Gust 8 mph
High Temperature 68° (1:35pm)
Low Temperature 48° (6:33am)

Dew Point

Wet Bulb Temperature
Rainfall Since Midnight

24-hour Change
30.04 in. 

Cloud Base ft.
Density Altitude
Pressure Altitude
Vapor Pressure 0.45 in.
Virtual Temperature 70°

Coastal Orange County Forecast

Meteoblue NowcastMarine ForecastArea Forecast Discussion

National Temperature Extremes

Tuesday, Contiguous 48 United States
at Rio Grande Village, Falcon Lake & Zapata, TX Low: at Peter Sinks, UT  

Temperature Converter

Enter temperature in either box and press [TAB].

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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 (11/16/20)
This Month's Low Temp (11/10/20)
This Month's Peak Wind Gust mph (11/8/20)

This Year's High Temp (9/6/20)
This Year's Low Temp (2/5/20)
This Year's Peak Wind Gust: mph (1/29/20)

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
Current Weather Fronts

Current U.S. Temperatures
Moon Phase

Heating° Days (Current) 6
Monthly Heating° Days (To Date): 161
Yearly Heating° Days (To Date) 1167
Cooling° Days (Current) 0
Monthly Cooling° Days (To Date) 44
Yearly Cooling° Days (To Date) 1240
Wind Run (Current)  2.36 mi.
Wind Run Monthly (To Date) 128.57 mi.
Wind Run Yearly (To Date) 4108.51 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

Area Forecast Discussion
FXUS66 KSGX 252159

Area Forecast Discussion
National Weather Service San Diego CA
200 PM PST Wed Nov 25 2020

Areas of low clouds will form over the coastal areas this evening 
and spread into the valleys tonight ahead of a trough of low 
pressure moving across the Great Basin. After the trough passes, 
gusty Santa Ana winds will move into Southern California Thursday 
and Friday. Skies will be mostly clear over the weekend with warm 
days, cool nights and low humidity.  



Skies were generally clear this afternoon. Pressure gradients were 
trending onshore this afternoon ahead of a trough over the Pacific 
Northwest that will move across the Great Basin Thursday. Marine 
layer clouds will reform over the coastal waters this evening and 
push into the coastal zones and western valleys overnight. 

Skies will clear in the Inland Empire early Thursday morning as the 
dry northerly flow kicks behind the passage of the trof axis. Skies 
will clear more slowly in San Diego County as the dry offshore will 
be slower to reach that area.  

The pending Santa Ana winds event will be moderate in strength with 
the strongest winds Thursday into Friday morning. Northerly winds 
will surface in the San Bernardino County mountains late tonight, 
then move down the slopes into the Inland Empire and the Santa Ana 
mountains through midday. Strongest winds arrive late Thursday 
afternoon and continue through early Friday morning in these areas. 
The ECMWF ensemble projects 60 mph wind gusts at Fremont Canyon in 
the foothills of the Santa Ana Mountains. Projected gusts at Ontario 
is 32 mph with the NBM.   

The winds arrive later in San Diego County in this northerly flow 
event, reaching the San Diego County mountains and foothills 
Thursday evening through Friday morning. The winds will not be as 
strong as they will be farther north, with wind gusts from 40 to 50 
mph in the mountains and foothills Friday morning. While the winds 
will not be as strong, the ensembles show moderate strength easterly 
winds persisting longer in San Diego County, continuing into 

Temperatures: Northerly flow will draw in a cool High Desert airmass 
into SoCal Thursday, so Thanksgiving will be a cool day in most 
areas. The coldest areas will be the High Deserts (highs in the mid 
50s) and the San Bernardino Mountains (highs 35-45). The warmest 
areas will be inland Orange County where the offshore flow will push 
highs into the low 70s. The Lower Deserts will also see highs in the 
low 70s. Friday will be a warmer day in all areas, with the most 
significant warming west of the mountains from the Santa Ana 
downslope flow. Both Saturday and Sunday will be sunny and warmer. 

Long Range Outlook for next week: There are differences in the 
operational GFS and the ECMWF runs, which isn't unusual, so we have 
sided with the ECMWF ensemble that project general ridging over the 
Southwest. On Monday a shortwave moves across the Pacific Northwest 
and then across the Great Basin Tuesday and Wednesday, with a high 
amplitude ridge over the West Coast. This pattern suggests above 
average chances of continued offshore flow over the Southwest 
through the middle of next week. 


252200Z...Coast/Valleys...Very isolated patches of low clouds will 
occur across the immediate coast this afternoon. Mostly SCT 
conditions with isolated BKN, bases 1500-1700 FT MSL. BKN-OVC to 
develop after 03z Thu across the coast and then spread inland. Bases 
2000-3000 FT MSL, extending 15-20 mi inland. FEW-SCT by 16-18z Thu.

Mountains and Deserts...Mostly clear with unrestricted vis through 
this evening. BKN-OVC with bases 2000-2500 FT AGL to develop 08-10z 
Thu and persist through 14-16z Thu. Breezy north to northeast winds 
to develop after 16z Thu, with winds 15-20 kts and gusts to 30 kts.


.MARINE...Gusty northeast winds will develop through Thu 
afternoon, with the highest winds Thu night through Fri morning. 
Expect winds in excess of 20 kts at times. Winds will diminish below 
20 kts Fri afternoon, but breezy conditions will persist at times 
through Fri night.


The Fire Weather Watch was upgraded to a Red Flag Warning today. The 
Red Flag Warning was shortened by a few hours due to the drop off in 
winds earlier than previously thought. The RFW is in effect from 2 
PM Thursday to 6 PM Friday for Orange, San Bernardino and Riverside 
Counties. In San Diego County the RFW is in effect from 9 PM 
Thursday to 9 AM Saturday.   

Northerly winds will surface in the San Bernardino County mountains 
tonight and then spread downslope into the Inland Empire and into 
the Santa Ana mountains Thursday. The strongest winds will arrive 
Thursday evening through Friday morning with gusts to 60 mph. This 
will be the period of greatest concern for rapid fire spread of any 
fires that do start. Weaker winds are forecast Saturday. 

In San Diego County the northerly flow pattern will delay the onset 
of the winds until late Thursday afternoon or evening, with a period 
of gusty northeast winds Thursday night into Friday with gusts from 
40-50 mph. Another round of slightly weaker winds follows on 

Lowest humidity on Thursday afternoon will fall to 10-20% for 
Orange, western Riverside, and southwestern San Bernardino Counties, 
followed by lower RH of 8-12% Friday. This drier air will spread 
south into San Diego County Thursday night and Friday.

Weaker winds may continue into Sunday and Monday. Little recovery
in humidity for inland areas is expected on Sunday. On Monday, a 
recovery in humidity near the coast could begin to spread inland 
for Monday and Tuesday.


Skywarn activation will not be needed Thursday. 


CA...Red Flag Warning from 9 PM Thursday to 9 AM PST Saturday for San 
     Diego County Inland Valleys-San Diego County Mountains-
     Including The Palomar And Descanso Ranger Districts of the 
     Cleveland National Forest.

     Red Flag Warning from 2 PM Thursday to 6 PM PST Friday for 
     Orange County Inland Areas-Riverside County Mountains-
     Including The San Jacinto Ranger District Of The San 
     Bernardino National Forest-San Bernardino County Mountains-
     Including The Mountain Top And Front Country Ranger 
     Districts Of The San Bernardino National Forest-San 
     Bernardino and Riverside County Valleys  -The Inland Empire-
     San Gorgonio Pass Near Banning-Santa Ana Mountains-
     Including The Trabuco Ranger District of the Cleveland 
     National Forest.





Weather Trend Graphs


© (rev. 2020_10271654)
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 Intellicast
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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