Weather forecast for 10 daysFontana, CA
Weather forecast for the weekend
Sunday Oct 18, 2026
- 88°F
- 63°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 9mphNE 35°
- Humidity: 28%
- UV index: 6
- Sunrise: 6:57 am PDT
- Sunset: 6:12 pm PDT
- details ▼
On Sunday, October 18, sunny and dry conditions are anticipated.
The temperature is forecasted to vary between a maximum of a tropical 87.8°F and a minimum of an enjoyable 62.6°F.
A high of 87.8°F is expected, which resembles September's climate average of 88.3°F more than October's 78.8°F.
Sunrise will be at 6:57 am and sunset at 6:12 pm; the daylight will last for 11h and 14min.
The temperature is forecasted to vary between a maximum of a tropical 87.8°F and a minimum of an enjoyable 62.6°F.
A high of 87.8°F is expected, which resembles September's climate average of 88.3°F more than October's 78.8°F.
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 day: today 88°C.
Coldest day: Thursday 66°C.
Coldest day: Thursday 66°C.
Chance of precipitation
Highest chance: Thursday 67%.
Long-term weather forecast
- Sunday
- Oct 18, 2026
- 88°F
- 63°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 9mphNE 35°
- Humidity: 28%
- 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 219°
- 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 201°
- Humidity: 42%
- 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: 56%
- 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: 67%
- 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: 6%
- Precipitation: 0"
- Wind: 8mphNW 313°
- 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: 40%
- 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 289°
- 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 209°
- Humidity: 50%
- UV index: 5
- Sunrise: 7:04 am PDT
- Sunset: 6:02 pm PDT
- details ▼
- Tuesday
- Oct 27, 2026
- 72°F
- 54°F
Partly Cloudy
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 9mphSW 224°
- Humidity: 50%
- UV index: 5
- Sunrise: 7:05 am PDT
- Sunset: 6:01 pm PDT
- details ▼
The next ten days will bring unstable conditions, and a mix of mostly clear, cloud-filled, rainy and lightning-active weather is expected.
Rain is anticipated on Wednesday and Thursday.
Expect a substantial fluctuation in daytime highs throughout the forecast window. The temperature is expected to swing from 66.2°F up to 87.8°F, while the minimum temperature is forecast to range between 53.6°F and 62.6°F.
Today is the hottest day, with a maximum temperature of 87.8°F; the lowest daytime temperature of the period will be reached on Thursday, peaking at 66.2°F.
Rain is anticipated on Wednesday and Thursday.
Expect a substantial fluctuation in daytime highs throughout the forecast window. The temperature is expected to swing from 66.2°F up to 87.8°F, while the minimum temperature is forecast to range between 53.6°F and 62.6°F.
Today is the hottest day, with a maximum temperature of 87.8°F; the lowest daytime temperature of the period will be reached on Thursday, peaking at 66.2°F.
Updated: Oct 18, 2026 @ 11:59:53 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, sunny skies are in store, with excellent visibility.
Today, the highest temperature will be 87.8°F, while the lowest temperature will be 62.6°F.
The maximum temperature today will be a couple of degrees higher than the average highest temperature in October. The lowest temperature will be also slightly warmer than the average low of 57.2°F.
The maximum temperature today will be a couple of degrees higher than the average highest temperature in October. The lowest temperature will be also slightly warmer 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).
Today in Fontana, the daylight will last for 11h and 14min.
