Weather forecast for 10 daysFontana, CA
Weather forecast for the weekend
Sunday Oct 18, 2026
- 86°F
- 63°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 9mphNE 43°
- Humidity: 29%
- UV index: 6
- Sunrise: 6:57 am PDT
- Sunset: 6:12 pm PDT
- details ▼
Today, on Sunday, October 18, sun-filled conditions are expected to persist.
Anticipated temperatures will peak at a tropical 86°F and dip to a minimum of a breezy 62.6°F.
The temperature of 86°F aligns more with what is typical in September than what is normal in October.
Sunrise will be at 6:57 am and sunset at 6:12 pm; the daylight will last for 11h and 14min.
Anticipated temperatures will peak at a tropical 86°F and dip to a minimum of a breezy 62.6°F.
The temperature of 86°F aligns more with what is typical in September than what is normal in October.
Sunrise will be at 6:57 am and sunset at 6:12 pm; the daylight will last for 11h and 14min.
10-day overview
Daily temperatures
Warmest period: today - tomorrow 86°C.
Coldest day: Thursday 66°C.
Coldest day: Thursday 66°C.
Chance of precipitation
Highest chance: Thursday 68%.
Long-term weather forecast
- Sunday
- Oct 18, 2026
- 86°F
- 63°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 9mphNE 43°
- Humidity: 29%
- UV index: 6
- Sunrise: 6:57 am PDT
- Sunset: 6:12 pm PDT
- details ▼
- Monday
- Oct 19, 2026
- 86°F
- 61°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 12mphSW 217°
- Humidity: 30%
- UV index: 6
- Sunrise: 6:58 am PDT
- Sunset: 6:10 pm PDT
- details ▼
- Tuesday
- Oct 20, 2026
- 82°F
- 61°F
Sunny
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 11mphSSW 197°
- Humidity: 41%
- UV index: 6
- Sunrise: 6:59 am PDT
- Sunset: 6:09 pm PDT
- details ▼
- Wednesday
- Oct 21, 2026
- 77°F
- 57°F
Showers
- Precip. probability: 55%
- Precipitation: 0.55"
- Wind: 12mphS 190°
- Humidity: 57%
- UV index: 6
- Sunrise: 7:00 am PDT
- Sunset: 6:08 pm PDT
- details ▼
- Thursday
- Oct 22, 2026
- 66°F
- 54°F
Scattered Thunderstorms
- Precip. probability: 68%
- Precipitation: 0.16"
- Wind: 8mphSSW 210°
- Humidity: 72%
- UV index: 5
- Sunrise: 7:00 am PDT
- Sunset: 6:07 pm PDT
- details ▼
- Friday
- Oct 23, 2026
- 72°F
- 55°F
Sunny
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 8mphNW 312°
- Humidity: 61%
- UV index: 5
- Sunrise: 7:01 am PDT
- Sunset: 6:06 pm PDT
- details ▼
- Saturday
- Oct 24, 2026
- 79°F
- 55°F
Sunny
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 8mphN 0°
- Humidity: 41%
- UV index: 5
- Sunrise: 7:02 am PDT
- Sunset: 6:05 pm PDT
- details ▼
- Sunday
- Oct 25, 2026
- 77°F
- 55°F
Partly Cloudy
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 9mphWNW 297°
- Humidity: 43%
- UV index: 5
- Sunrise: 7:03 am PDT
- Sunset: 6:04 pm PDT
- details ▼
- Monday
- Oct 26, 2026
- 73°F
- 54°F
Mostly Sunny
- Precip. probability: 10%
- Precipitation: 0"
- Wind: 10mphSSW 211°
- Humidity: 50%
- UV index: 5
- Sunrise: 7:04 am PDT
- Sunset: 6:02 pm PDT
- details ▼
- Tuesday
- Oct 27, 2026
- 73°F
- 54°F
Partly Cloudy
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 9mphSW 228°
- Humidity: 50%
- UV index: 5
- Sunrise: 7:05 am PDT
- Sunset: 6:01 pm PDT
- details ▼
Over the course of the next ten days, expect shifting weather, and a mix of bright, cloud-filled, rain-filled and stormy weather is expected.
Rain is expected on Wednesday and Thursday.
Significant changes in temperature are expected over the next several days. The temperature is expected to swing from 66.2°F up to 86°F, while the minimum temperature is forecast to range between 53.6°F and 62.6°F.
The hottest days will be Sunday and Monday, with a maximum of 86°F; expect the coldest day on Thursday with a high of 66.2°F.
Rain is expected on Wednesday and Thursday.
Significant changes in temperature are expected over the next several days. The temperature is expected to swing from 66.2°F up to 86°F, while the minimum temperature is forecast to range between 53.6°F and 62.6°F.
The hottest days will be Sunday and Monday, with a maximum of 86°F; expect the coldest day on Thursday with a high of 66.2°F.
Updated: Oct 18, 2026 @ 10:44:00 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
Frequently asked questions
Today, in Fontana, sunshine is forecasted under mostly clear skies.
Today, the maximum temperature will be 86°F, while the minimum temperature will be 62.6°F.
Today, the highest temperature will be relatively higher than the average maximum temperature in October. The lowest temperature will be also relatively higher than the average low of 57.2°F.
Today, the highest temperature will be relatively higher than the average maximum temperature in October. The lowest temperature will be also relatively higher than the average low of 57.2°F.
On Sunday, in Fontana, sunrise will be at 6:57 am and sunset at 6:12 pm (PDT).
In Fontana, the length of the day today will be 11h and 14min.
