Fontana, CA Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Fontana, CA in one place.
Sunny, with a high near 103. West wind 10 to 15 mph, with gusts as high as 25 mph.
Local Weather Overview
This forecast page for Fontana, 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: Aug 23, 2026 4:20 PM PDT.
The active forecast window currently covers Aug 23 to Aug 29, 2026 for Fontana, CA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Aug 23 to Aug 29, 2026
- Latest sync
- Aug 23, 2026 4:20 PM PDT
- Forecast office
- SGX
- Source
- NOAA / NWS
Daily Outlook
This Week in Fontana
Tuesday looks like the warmest upcoming period in Fontana at 104 degrees F.
Saturday Night is the coolest period ahead with temperatures near 72 degrees F.
The strongest winds are forecast for This Afternoon at about 10 to 15 mph W.
The forecast from Aug 23 through Aug 29 stays mostly dry.
Forecast Details
- Last updated
- Aug 23, 2026 4:20 PM PDT
- Coverage
- 8 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 73. West wind 0 to 15 mph, with gusts as high as 25 mph.
Sunny, with a high near 102. Southwest wind 0 to 15 mph, with gusts as high as 25 mph.
Mostly clear, with a low around 73. West wind 0 to 10 mph, with gusts as high as 20 mph.
Sunny, with a high near 104. Northwest wind 0 to 10 mph, with gusts as high as 20 mph.
Mostly clear, with a low around 75.
Sunny, with a high near 104.
Mostly clear, with a low around 76.
Sunny, with a high near 104.
Mostly clear, with a low around 76.
Sunny, with a high near 104.
Mostly clear, with a low around 74.
Sunny, with a high near 103.
Mostly clear, with a low around 72.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
Aug 23
|
Sunny
|
103°F |
10 to 15 mph
W
|
|
Tonight
Aug 23
|
Mostly Clear
|
73°F |
0 to 15 mph
W
|
|
Monday
Aug 24
|
Sunny
|
102°F |
0 to 15 mph
SW
|
|
Monday Night
Aug 24
|
Mostly Clear
|
73°F |
0 to 10 mph
W
|
|
Tuesday
Aug 25
|
Sunny
|
104°F |
0 to 10 mph
NW
|
|
Tuesday Night
Aug 25
|
Mostly Clear
|
75°F |
0 to 10 mph
NW
|
|
Wednesday
Aug 26
|
Sunny
|
104°F |
0 to 10 mph
NW
|
|
Wednesday Night
Aug 26
|
Mostly Clear
|
76°F |
0 to 10 mph
NW
|
|
Thursday
Aug 27
|
Sunny
|
104°F |
0 to 10 mph
W
|
|
Thursday Night
Aug 27
|
Mostly Clear
|
76°F |
0 to 10 mph
W
|
|
Friday
Aug 28
|
Sunny
|
104°F |
0 to 10 mph
NW
|
|
Friday Night
Aug 28
|
Mostly Clear
|
74°F |
0 to 10 mph
W
|
|
Saturday
Aug 29
|
Sunny
|
103°F |
0 to 10 mph
NW
|
|
Saturday Night
Aug 29
|
Mostly Clear
|
72°F |
0 to 10 mph
W
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Fontana.
