At an airfield/2.1 mi away/1,010 ft/99 ft above here
temp, wind, gust, visibility, precip, pressure
Weather/California/San Dimas
San Dimas, California
City in Los Angeles County, California...HIGH RISK FOR RAPID FIRE GROWTH AND EXTREME FIRE BEHAVIOR WITH ANY NEW FIRE STARTS THROUGH SATURDAY, DUE TO MODERATE TO LOCALLY STRONG SANTA ANA WINDS AND LOW RELATIVE HUMIDITY... .Updates include adding the following areas to the previous Red Flag Warnings - Ojai, Casitas, and the Santa Lucia Mountains. Moderate to strong Santa Ana winds will peak around Friday then slowly weaken through the weekend. Meanwhile, dry air will persist and dry out any effects of the recent rains. Red Flag Warnings are in effect for most of Los Angeles and Ventura Counties Thursday through Saturday, and for interior Santa Barbara and San Luis Obispo Counties for Friday. * AFFECTED AREA...Most valleys and coasts of Los Angeles and Ventura Counties. * TIMING...Until 8 PM PDT Saturday. * WINDS...Northeast to east 20 to 35 mph with gusts of 40 to 55 mph. Isolated gusts to 65 mph possible. Strongest Friday. * RELATIVE HUMIDITY...Minimums of 8 to 15 percent common. * IMPACTS...If fire ignition occurs, conditions are favorable for extreme fire behavior which would threaten life and property.
A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. Use extreme caution with anything that can spark a wildfire. Residents near wildland interfaces should be prepared to evacuate if a wildfire breaks out. See readyforwildfire.org and wildfirerisk.org for information.
78°
89°/59°
Clear·
Feels like 78°·Gentle breeze 11 mph ENE
Alert. A Red Flag Warning is in force for San Dimas until 8 PM Saturday. Read the alert in full, and see what it means in the Field Book.
Now. San Dimas is 78° and clear at 8 PM. The dew point is 37°, so the air feels dry and comfortable. Gentle breeze from the east-northeast at 11 mph.
Today and tonight. Tonight falls to about 69° by 6 AM, under a mostly clear sky. No rain is expected for the rest of the day.
The week. The warmest day ahead is tomorrow, near 90°, and the coolest Wednesday, near 66°. Rain is likely Tuesday (55%) and Wednesday (63%).
The sky now. The Moon is a waxing crescent, 26% lit, and sets at 9:38 PM. The next full Moon is Sunday, Oct 25. Look for Saturn, bright in the east-southeast. A planet shines with a steady light where the stars around it twinkle. The Orionids meteor shower is active, peaking around Oct 21: at its peak, up to about 20 meteors an hour can be seen from a dark site. The sky is forecast to stay clear: a good night to look up. The day is 11 hours 22 minutes long, 2 minutes shorter than yesterday.
0UV Low
43Air quality
22%Humidity
0%Cloud
Now
8:00 PM
78feels78
now, clear
Today
Oct 15
8959
19mph
UV 7
Fri
Oct 16
9069
17mph
UV 7
Sat
Oct 17
8767
12mph
UV 6
Sun
Oct 18
8463
UV 7
Mon
Oct 19
8163
UV 7
Tue
Oct 20
7059
55%
Wed
Oct 21
6655
63%
78°
89°59°
90°69°
87°67°
84°63°
81°63°
70°59°
66°55°
As of 8:00 PM in San Dimas, California.
Air quality
The air at San Dimas
Index 43, good, led by ozone. Read at 8 PM from its reporting area, E San Gabriel Vly (CA), 5 miles off.
43Good
- Fine particles (PM2.5)16Good-
- Ozone43Good-
- Coarse particles (PM10)15Good-
The days ahead
Good each day through Fri Oct 16, led by ozone. Yesterday measured 49, good.
GoodModerate
- 49YesterdayOct 14
- 45TodayOct 15
- 50FriOct 16
Smoke, the next 46 hours
Little smoke near the ground through Sat 5 PM: the index from smoke stays at 22 or under.
Precipitation
What has fallen at San Dimas
None in the last 3 days, to Thu 7 PM. Measured by radar and rain gauges, as water.
- Last 24 hours
- 0.00in
- Last 3 days
- 0.00in
Visibility
How far you can see at San Dimas, the next 46 hours
Visibility stays 10 miles or more through Sat 5 PM.
F
Now, today, and the week
On the radar over San Dimas, CaliforniaReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture
Weather instrument stations by state
What is measuring near here
The 6 instruments nearest San Dimas, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.6 miles away.
measured now4 instruments
Rank3,831of 4,465
Citizen station GW1944GW1944
In a volunteer observer's own ground/4.1 mi away/1,562 ft/651 ft above here
temp, humidity, wind, precip, pressure
Tanbark RAWSTANC1
A remote fire weather station/5.1 mi away/1,962 ft/1,051 ft above here
temp, wind, gust, humidity, pressure
I-15 : Jurupa AvenueCF174
Beside a road/15.6 mi away/908 ft/3 ft below here
temp, pavement temp, wind, visibility, precip
measured daily2 instruments
San Dimas 2.1 WSWCA-LA-129
In a volunteer observer's own ground/1.6 mi away/726 ft/185 ft below here
precip, snowfall, snow depth
Covina YardCTFC1
At a cooperative observer's station/3.9 mi away/594 ft/317 ft below here
snowfall, snow depth, precip, high, low
Station report
The weather at La Verne/Brackett, drawn
The nearest airport reporting now, 2.1 mi from San Dimas, California. From its report of Oct 15, 2026, 7:47 PM local time: 3 of its 6 sheets.
The sky
Clear; visibility 10 mi or more.
The air
78.8 F with a dew point of 37.4 F, 23 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 9,400 ft up.
The wind
From the west (280 degrees) at 12 mph: force 3, a gentle breeze on the Beaufort scale. The strongest gust today was 29 mph.
The full report of La Verne/Brackett, in 6 sheets, each beside the Field Book plates that explain it
What the snow tracker reads here
Every instrument in this state
-
Snow on the ground
Elsewhere in California
33 places, each with its own forecast and its own instruments.
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Near San Dimas
The nearest places, each with its own forecast and the instruments nearest it.