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Rancho San Joaquin, Irvine, CA 92612
Weather Conditions Updated at 5:58am on 6/22/21
Sky Temperature (°F) Wind 

Visibility 10 mi.


Temp Rate °/hr.
24-hr. Change °

Max Gust 1 mph
High Temperature 65° (5:27am)
Low Temperature 65° (3:48am)

Dew Point

Wet Bulb Temperature
Rainfall Since Midnight

24-hour Change
29.93 in. 

Cloud Base ft.
Density Altitude
Pressure Altitude
Vapor Pressure 0.55 in.
Virtual Temperature 69°

Coastal Orange County Forecast

Meteoblue NowcastMarine ForecastArea Forecast Discussion

National Temperature Extremes

Monday, Contiguous 48 United States
at Death Valley, CA Low: at West Yellowstone & White Sulphur Springs 13N, MT;
Albany 9S, 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 (6/15/21)
This Month's Low Temp (6/11/21)
This Month's Peak Wind Gust mph (6/7/21)

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): 22
Yearly Heating° Days (To Date) 1005
Cooling° Days (Current) 0
Monthly Cooling° Days (To Date) 79
Yearly Cooling° Days (To Date) 293
Wind Run (Current)  0.02 mi.
Wind Run Monthly (To Date) 73.08 mi.
Wind Run Yearly (To Date) 1412.29 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 221149

Area Forecast Discussion
National Weather Service San Diego CA
449 AM PDT Tue Jun 22 2021

Night and morning low clouds and fog spreading into portions of
the valleys will continue this week, but not spread as far inland
for the weekend into early next week. Mid and high level moisture
and clouds will spread northward across the area through 
Wednesday. This will bring scattered, mostly light showers at 
times with light measurable amounts more likely in the mountains. 
There is also a slight chance of thunderstorms on Wednesday. 
Cooling will spread inland through Wednesday with warming 
beginning for inland areas on Thursday. The warming trend will 
continue for Friday through Monday as high pressure strengthens to
the north.



.SHORT TERM (Today through Thursday)...
A weak upper level low pressure system off the California coast
will move slowly eastward, but with the upper center by late
Wednesday remaining just off the coast to the west of the Bay
Area. This low pressure system will then weaken through Thursday. 
This low pressure system will draw mid and high level moisture,
some moisture from once was tropical cyclone Dolores, northward 
into the southwest states through Wednesday. 

The 12Z Monday ECMWF Extreme Forecast Index for QPF for tonight 
and Wednesday had some very large Shift of Tails values over 
portions of southern California and adjacent states, highlighting 
the potential for a climatological very unusual precipitation 
event. The latest 00Z cycle has backed off somewhat, with the 
highest values in southern California from around the San 
Bernardino County mountains northward across portions of the high 
desert. It should be noted that this is a very dry time of the
year for southern California, so it doesn't take all that much
precipitation to be a very unusual event for this time of year.

The mean of all of the ensemble members of the 00Z cycle of the
ECMWF increases the precipitable water values at NKX with the 
peak of 1.5 inches at 12Z Wednesday. That would exceed the 
highest on record for that date and time of 1.27 inch, but below 
the record of 1.61 inch for the month of June. 

Model soundings show the atmosphere saturating initially today 
down to around 500 mb with with a layer between 700 mb and 500 mb 
becoming more saturated for late tonight into Wednesday morning 
with the moisture then decreasing in the afternoon and evening 
with the moisture centered around 600 mb. The incoming 12Z NKX
sounding has a nearly saturated layer from around 550 mb to a
little above 300 mb.

Some light showers are possible as early as this afternoon with 
the most likely location for any measurable amounts in the higher 
elevations of the mountains with virga more likely elsewhere. As 
the moist layer lowers late tonight into Wednesday morning, there 
would be greater potential for some light measurable amounts, even
at low elevations with the greater amounts still in the 
mountains. The atmosphere becomes weakly unstable on Wednesday 
with isolated thunderstorms possible in addition to showers. With
a dry subcloud layer below cloud bases around 700 mb or higher, 
strong wind gusts with showers or isolated thunderstorms are more 
likely at lower elevations. 

While the moisture does increase, any forcing is fairly weak, so
timing and amounts are less certain beyond it being more likely
for greater amounts in the mountains and less at lower 
elevations. Uncalibrated ECMWF ensemble members have a mean of 
around 2 tenths of an inch in the San Bernardino Mountains with 
the wettest ensemble members to around 4 tenths of an inch. The 
HREF has a local PMM QPF with a max of around one half inch in 
the San Bernardino Mountains.

In addition to the mid and high clouds through Wednesday, there
will be areas of night and morning coastal low clouds and fog
spreading into portions of the valleys. There will be a cooling
trend into Wednesday with inland areas beginning to warm on


.LONG TERM (Friday through Monday)...
For the weekend into early next week, high pressure aloft will
strengthen and be centered somewhere in the vicinity of the
Pacific Northwest and northern Rockies with weaker high pressure
extending southward through California. 

While a warming trend is expected for Friday through Monday, there
remains greater uncertainty in just how much warming will occur.
The current forecast is close to NBM with the deterministic NBM
near the middle of the guidance spread versus the higher
percentiles (warmer end of the guidance) for inland areas with the
recent heat wave. The marine layer should become shallower with
night and morning coastal low clouds not spreading as far inland,
mainly just into coastal areas by Sunday and Monday.


220935Z...Coast/Valleys...Low clouds with bases 1000-1500 ft MSL 
have surged about 15-20 miles inland early this morning. Cigs still 
should stick southwest of KONT through the morning. MOD-HI 
confidence that low clouds will scatter out around 15-16Z inland and 
closer to 17-19Z toward the coast. High clouds have come into the 
region early this morning and will continue throughout the day AOA 
15000 feet MSL. 

Mountains/Deserts...Chance of SHRA across the area this afternoon 
and evening along with high clouds AOA 15000 feet MSL. Desert slopes 
and deserts of SBD county will see wind gusts 25-30 kts at times 
this afternoon and evening, which may cause MOD UDDFS. Calmer winds 
expected in VCTY KPSP/KTRM today.


Slight chance of showers for the inner coastal waters this evening 
into early Wednesday, along with periodic wind gusts near 20 knots 
in the outer waters each afternoon and evening through Friday. 
Otherwise, no significant hazardous marine weather is expected 
through Saturday. 


Tides close to 7 feet and elevated surf may produce areas of beach 
erosion and coastal tidal overflow in Orange County through 
Thursday. See the Beach Hazard Statement for details. 


Mid and high level moisture and clouds will move northward across
the area through Wednesday. Scattered mostly light showers are 
possible as early as this afternoon, with any measurable amounts 
most likely in the mountains, Greater coverage is more likely 
from late tonight into Wednesday morning. With the moisture mainly
in the mid levels and above, measurable amounts are more likely 
in the mountains and less at lower elevations. Chances for wetting
rainfall remains low, but has been increased somewhat and is 
around 30 percent in the San Bernardino Mountains on Wednesday. 
Isolated thunderstorms are also possible on Wednesday. Dry 
lightning remains a possibility, though the precipitation 
potential has increased somewhat in the mountains. There could 
also be strong gusty winds with any thunderstorms, especially at 
lower elevations.

High pressure to the north is expected to bring drying and warming
for late in the week into early next week. Lowest humidity for the
deserts onto the desert slopes of the mountains will once again 
fall to around 10 percent. That low humidity combined with gusty 
southwest to west sea breeze winds each afternoon and evening will
result in elevated fire weather conditions for the deserts onto 
the desert slopes of the mountains each afternoon. With the 
warming, the potential for plume-dominated fire growth for the 
mountains and deserts will return for late morning through early 
evening each day.


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


CA...Beach Hazards Statement from this evening through Thursday 
     evening for Orange County Coastal Areas.





© (rev. 2021_06120213)
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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