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Rancho San Joaquin, Irvine, CA 92612
Weather Conditions Updated at 12:48am on 10/30/20
Sky Temperature (°F) Wind 

Visibility 8 mi.


Temp Rate °/hr.
24-hr. Change °

Max Gust 1 mph
High Temperature 58° (12:00am)
Low Temperature 57° (12:44am)

Dew Point

Wet Bulb Temperature
Rainfall Since Midnight

24-hour Change
29.99 in. 

Cloud Base ft.
Density Altitude
Pressure Altitude
Vapor Pressure 0.36 in.
Virtual Temperature 60°

Coastal Orange County Forecast

Meteoblue NowcastMarine ForecastArea Forecast Discussion

National Temperature Extremes

Thursday, Contiguous 48 United States
at Chino, CA; Palm Beach & Pierson 2W, FL Low: at Saratoga 4N, WY  

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 (10/1/20)
This Month's Low Temp (10/29/20)
This Month's Peak Wind Gust mph (10/26/20)

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) 0
Monthly Heating° Days (To Date): 25
Yearly Heating° Days (To Date) 998
Cooling° Days (Current) 0
Monthly Cooling° Days (To Date) 180
Yearly Cooling° Days (To Date) 1190
Wind Run (Current)  0.00 mi.
Wind Run Monthly (To Date) 198.99 mi.
Wind Run Yearly (To Date) 3972.93 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 300414

Area Forecast Discussion
National Weather Service San Diego CA
915 PM PDT Thu Oct 29 2020

Warm dry weather will prevail through at least the middle of next 
week. Weak northeasterly winds will continue over the mountain 
crests, though these northeast winds will push into many of the 
valleys Sunday and Monday as a weak low pressure system sits just 
off the coast. Patchy low clouds and fog, possibly dense, could 
occur along the coast early Friday, or more likely Friday night and 
early Saturday. A pattern change is likely near the end of next week 
with much cooler weather and perhaps some rain.



Skies were mostly clear at mid-evening, though patchy low clouds and 
fog have formed over the coastal waters between about 30 and 60 
miles off the San Diego County coast. HREFv3 shows a chance of the 
low stratus/fog reaching the coast by early Fri morning, though 
chances are higher Fri night and Sat morning. It was a warm day 
today, with a few stations in the lower 90s in the Inland Empire, 
and Chino tied the hot spot for the US at 93, along with a couple 
stations in Florida, albeit with much lower humidity (7 percent at 
Chino for the lowest today)!

The air mass will remain relatively unchanged through Saturday with 
just slight rises in temperatures aloft. High pressure aloft will 
prevail just off the Califonria coast while a weak shortwave will 
move slowly through SoCal/southern Nevada and eventually shift 
southwest off the coast. The weak offshore/northeasterly flow over 
the mountains will strengthen a bit Sunday/Monday in response to the 
upper low plus some surface pressure rises over the Great Basin, 
though gradients associated with that will mostly stay to our 
northeast. The lack of any strong thermal gradients will likely keep 
wind gusts mostly under 35 MPH Sunday and Monday. The offshore push 
will make Sun/Mon quite warm with a lot of valley locations likely 
to be at/above 90. With mostly dry air and the longer nights of 
fall, lows should mostly be in the 50s or even locally colder, so 
that, combined with the lower sun angle, will help temper the 
impacts of the heat. There is uncertainty with where the upper low 
will end up, but some model guidance has suggested some cooling if 
the low moves back over SoCal and eventually to the northeast Tue.

Later in the week, a deep longwave trough of low pressure will move 
southeast towards the Pacific NW and will likely cover much of the 
western US by the weekend of Nov 7-8. Most of the GEFS/ECMWF 
ensemble solutions show that but more northwesterly flow here 
associated with the trough, which is not favorable for substantial 
precipitation. We could get light precipitation though. More likely, 
much cooler weather with areas of strong winds will occur then.


300415Z...Mostly clear skies with unrestricted vis will prevail at 
all terminals through Friday. Some patchy low clouds and fog may 
form over the coastal waters tonight, but no ceilings are expected 
at coastal terminals. 


No hazardous marine conditions are expected through Monday. Patchy 
low clouds and dense fog with visibility below 1 nautical mile is 
possible tonight through Friday morning, and again Friday night into 
Saturday morning.


Onshore flow near the coast and weaker offshore flow inland will
allow for some improvement in humidity through Friday. Lowest 
daytime humidity of 10 to 15 percent for inland areas combined 
with locally gust east to northeast winds less than 30 mph near 
the coastal slopes of the mountains will continue elevated fire 
weather conditions for inland areas during the day for each day 
through Saturday.

East to northeast winds for inland areas may be slightly stronger
Sunday and Monday, but still mainly confined to the coastal slopes
and passes. Gusts mostly 35 mph or less, though there is the
potential for isolated gusts to 40 mph. Lowest daytime humidity 
for inland areas will also be a little lower, around 8 to 12 
percent. Elevated fire weather conditions will continue for inland
areas each day, but could be briefly near critical near the 
coastal slopes of the mountains and passes Sunday and Monday

For Tuesday through Thursday, offshore flow will weaken with some
improvement in humidity, though temperatures will remain well 
above normal. Stronger onshore flow with greater cooling and 
greater recovery in humidity may occur late next week as a large 
trough of low pressure may develop near the West Coast.


Skywarn activation is not requested. However weather spotters are
encouraged to report significant weather conditions.






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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