Rancho Cucamonga, CA Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Rancho Cucamonga, CA in one place.
Sunny, with a high near 98. Southwest wind 0 to 10 mph, with gusts as high as 20 mph.
Local Weather Overview
This forecast page for Rancho Cucamonga, CA is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Jul 14, 2026 6:17 PM PDT.
The active forecast window currently covers Jul 16 to Jul 20, 2026 for Rancho Cucamonga, CA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 16 to Jul 20, 2026
- Latest sync
- Jul 14, 2026 6:17 PM PDT
- Forecast office
- SGX
- Source
- NOAA / NWS
Daily Outlook
This Week in Rancho Cucamonga
Thursday looks like the warmest upcoming period in Rancho Cucamonga at 98 degrees F.
Friday Night is the coolest period ahead with temperatures near 65 degrees F.
The strongest winds are forecast for Thursday at about 0 to 10 mph SW.
The forecast from Jul 16 through Jul 20 stays mostly dry.
Forecast Details
- Last updated
- Jul 14, 2026 6:17 PM PDT
- Coverage
- 6 days
- Time zone
- America/Los_Angeles
- Forecast office
- SGX
- Radar station
- KSOX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 67.
Sunny, with a high near 92.
Mostly clear, with a low around 65.
Sunny, with a high near 90.
Mostly clear, with a low around 65.
Sunny, with a high near 91.
Mostly clear, with a low around 65.
Sunny, with a high near 91.
Mostly clear, with a low around 66.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Jul 16
|
Sunny
|
98°F |
0 to 10 mph
SW
|
|
Thursday Night
Jul 16
|
Mostly Clear
|
67°F |
0 to 10 mph
SW
|
|
Friday
Jul 17
|
Sunny
|
92°F |
0 to 10 mph
SW
|
|
Friday Night
Jul 17
|
Mostly Clear
|
65°F |
0 to 10 mph
SW
|
|
Saturday
Jul 18
|
Sunny
|
90°F |
0 to 10 mph
SW
|
|
Saturday Night
Jul 18
|
Mostly Clear
|
65°F |
0 to 10 mph
SW
|
|
Sunday
Jul 19
|
Sunny
|
91°F |
0 to 10 mph
SW
|
|
Sunday Night
Jul 19
|
Mostly Clear
|
65°F |
0 to 10 mph
SW
|
|
Monday
Jul 20
|
Sunny
|
91°F |
0 to 10 mph
SW
|
|
Monday Night
Jul 20
|
Mostly Clear
|
66°F |
0 to 10 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Rancho Cucamonga.
