Rancho Cucamonga, California weather
United States · America/Los_Angeles · 34.11, -117.59
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Rancho Cucamonga, CA Weather Today
Current conditions, hourly and 7 day forecast, official severe weather alerts, and air quality for Rancho Cucamonga, California. Every section shows where the data came from and when it was last checked.
Your briefing — take action
Rancho Cucamonga, California
- Right now
- High Wind Warning in effect for San Bernardino and Riverside County Valleys-The Inland Empire.Official warning
- Next few hours
- No rain in the forecast for the next few hours.Forecast
- Your day
- Best outdoor window: 6 AM to 12 PM.Our reading
- UV index 6 — sunburn risk during the strongest sun.Observed
What officials say to do
- People are urged to secure loose objects that could be blown around or damaged by the wind.
Wording from NWS San Diego CA. Read the official warning
What happens next
- NowHigh Wind Warning covers San Bernardino and Riverside County Valleys-The Inland Empire.Official warning
- NextOfficial warning runs until 5:15 AM.Official warning
Official warnings for this location come from NOAA / National Weather Service. Lines marked Our reading are WeatherSignal’s reading of the measurements and forecast, not an official statement.
Rancho Cucamonga, California
85°
Mainly clear
Feels like 84° · High 85° · Low 64°
Partly cloudy sky here right now. Nothing falling.
Warm and partly cloudy early this morning. 85° right now. Today's high is 85°.
- Sunrise 11:00 PM
- Today's high 85°
- Rain next 6 hrs 0%
Next few hours
Now
85°
—
6 PM
81°
—
7 PM
77°
—
8 PM
75°
—
9 PM
74°
—
- Rain chance
- 0%
- Wind
- 13 mph NE
- Humidity
- 24%
- Air quality
- 39 Good
Source updated: 12:31:41 AM · WeatherSignal checked: 12:31:41 AM
What matters today
Six quick answers for Rancho Cucamonga. Tap Why? on any of them to see the reasoning.
Umbrella
Nah (Good)
Best time
11 PM (Good)
Dog walk
11 PM (Good)
Car wash
Go for it (Good)
Cookout
Green light (Good)
Windows
Roll 'em down (Good)
Today's Signal
Mixed day
60/100
A mixed day: the wind and poor visibility will get in the way of outdoor plans.
Visibility 0.0 mi · Active High Wind Warning
Today is about 11° warmer than the rest of the week.
See exactly how this number was worked out
Every location starts at 100. Points come off for heat, cold, rain, wind, UV, humidity, poor visibility, and any official alert. Nothing is ever added back.
- Starting score100
- Visibility 0.0 mi-10
- Active High Wind Warning-30
- Final Signal60
Next 12 hours
Steady conditions, but the temperature swings about 15° across the next 12 hours.
- 6 PMWarmest stretch · 81°
- 11 PMSunrise
- 5 AMCoolest stretch · 67°
- 6 PM—81 degrees, 0 percent chance of rain
- 7 PM—77 degrees, 0 percent chance of rain
- 8 PM—75 degrees, 0 percent chance of rain
- 9 PM—74 degrees, 0 percent chance of rain
- 10 PM—73 degrees, 0 percent chance of rain
- 11 PM—71 degrees, 0 percent chance of rain
- 12 AM—70 degrees, 0 percent chance of rain
- 1 AM—70 degrees, 0 percent chance of rain
- 2 AM—69 degrees, 0 percent chance of rain
- 3 AM—69 degrees, 0 percent chance of rain
- 4 AM—68 degrees, 0 percent chance of rain
- 5 AM—67 degrees, 0 percent chance of rain
The line is temperature by hour. The number under each hour is the chance of rain. Scroll sideways for the full 12 hours.
Next change
It keeps cooling down overnight
Temperatures fall from about 81° to 67° over the next 12 hours. There is no meaningful rain signal in the next several hours.
WeatherSignal NOW: Rancho Cucamonga, California
One number for everything happening around you, from 0 to 100.
82
WATCHFUL
Severe weather is what is pulling this number down: official advisory in effect.
Tap any line to see exactly what added or subtracted points. Every rule is published on our methodology page. This is an informational signal, not a safety rating: official warnings always come first.
What this means
Generated from the forecast values above using fixed rules: not an AI guess.
- A High Wind Warning issued by NWS San Diego CA is active for San Bernardino and Riverside County Valleys-The Inland Empire.
- No significant precipitation is expected in the next 24 hours.
Next 24 hours
Will it rain during your commute? When does the storm arrive?
See all 47 hours (2 days) — free
| Time | Condition | Temp | Feels | Precip % | Amount | Wind | Humidity |
|---|---|---|---|---|---|---|---|
| 6 PM | Clear sky | 81° | 80° | 0% | 0.00″ | 12 NE | 28% |
| 7 PM | Clear sky | 77° | 76° | 0% | 0.00″ | 9 NNE | 35% |
| 8 PM | Clear sky | 75° | 74° | 0% | 0.00″ | 9 NNE | 39% |
| 9 PM | Clear sky | 74° | 73° | 0% | 0.00″ | 10 NNE | 40% |
| 10 PM | Clear sky | 73° | 72° | 0% | 0.00″ | 10 NNE | 41% |
| 11 PM | Clear sky | 71° | 70° | 0% | 0.00″ | 10 NNE | 42% |
| 12 AM | Clear sky | 70° | 69° | 0% | 0.00″ | 10 NNE | 44% |
| 1 AM | Clear sky | 70° | 69° | 0% | 0.00″ | 10 NNE | 45% |
| 2 AM | Clear sky | 69° | 68° | 0% | 0.00″ | 9 NNE | 45% |
| 3 AM | Clear sky | 69° | 68° | 0% | 0.00″ | 9 NNE | 45% |
| 4 AM | Clear sky | 68° | 66° | 0% | 0.00″ | 9 NE | 47% |
| 5 AM | Clear sky | 67° | 66° | 0% | 0.00″ | 8 NNE | 48% |
| 6 AM | Clear sky | 65° | 64° | 0% | 0.00″ | 8 NNE | 52% |
| 7 AM | Clear sky | 64° | 63° | 0% | 0.00″ | 8 NNE | 52% |
| 8 AM | Clear sky | 68° | 67° | 0% | 0.00″ | 7 NNE | 48% |
| 9 AM | Partly cloudy | 75° | 74° | 0% | 0.00″ | 5 SSE | 37% |
| 10 AM | Partly cloudy | 78° | 77° | 0% | 0.00″ | 7 SSE | 30% |
| 11 AM | Overcast | 80° | 78° | 0% | 0.00″ | 6 SSE | 26% |
| 12 PM | Overcast | 82° | 81° | 0% | 0.00″ | 5 SSE | 23% |
| 1 PM | Overcast | 83° | 82° | 0% | 0.00″ | 5 S | 21% |
| 2 PM | Partly cloudy | 85° | 84° | 0% | 0.00″ | 6 S | 20% |
| 3 PM | Partly cloudy | 85° | 84° | 0% | 0.00″ | 7 SSE | 19% |
| 4 PM | Partly cloudy | 84° | 83° | 0% | 0.00″ | 8 NNE | 19% |
| 5 PM | Mainly clear | 82° | 80° | 0% | 0.00″ | 7 NNE | 19% |
7-day forecast
Confidence decreases the further out you look.
Today
Clear sky
85° / 64°
- Precip:
- 0% · 0.00″
- Wind:
- 13 mph
- UV:
- 6.1
- Sun:
- 11 PM to 11 AM
Sun, Oct 18
Clear sky
84° / 64°
- Precip:
- 0% · 0.00″
- Wind:
- 7 mph
- UV:
- 6.3
- Sun:
- 11 PM to 11 AM
Mon, Oct 19
Clear sky
83° / 67°
- Precip:
- 0% · 0.00″
- Wind:
- 11 mph
- UV:
- 0.4
- Sun:
- 11 PM to 11 AM
Tue, Oct 20
Clear sky
78° / 62°
- Precip:
- 0% · 0.00″
- Wind:
- 7 mph
- UV:
- 0.0
- Sun:
- 11 PM to 11 AM
Wed, Oct 21
Clear sky
73° / 60°
- Precip:
- 0% · 0.00″
- Wind:
- 5 mph
- UV:
- 0.0
- Sun:
- 11 PM to 11 AM
Lower confidence: long-range outlook, not a certainty.
Thu, Oct 22
Clear sky
63° / 58°
- Precip:
- 0% · 0.00″
- Wind:
- 4 mph
- UV:
- 0.0
- Sun:
- 11 PM to 11 AM
Lower confidence: long-range outlook, not a certainty.
Fri, Oct 23
Clear sky
67° / 56°
- Precip:
- 0% · 0.00″
- Wind:
- 4 mph
- UV:
- 0.0
- Sun:
- 11 PM to 11 AM
Lower confidence: long-range outlook, not a certainty.
Forecasts describe likely conditions, not guaranteed outcomes. Official warnings from your national weather service always take precedence over anything shown here.
Air quality
US EPA AQI · Good
- AQI
- 39
- Primary
- Ozone
- PM2.5
- 3.5µg/m³
- PM10
- 7.4µg/m³
- Ozone
- 90.0µg/m³
- Dust
- 7.0µg/m³
Good
Highest measured pollutant
Air quality is satisfactory for outdoor activity.
Air-quality guidance comes from the published category definitions of the source scale. WeatherSignal does not provide medical advice.
Source updated: not provided · WeatherSignal checked: 12:31:40 AM
Rancho Cucamonga hourly weather
Hour by hour, out to eight days ahead.
Rancho Cucamonga 7 day forecast
Highs, lows and rain chance for the week.
Air quality detail
Pollutants, category, and official guidance.