Weather forecast for 10 daysUnion City, CA
Weather forecast for the weekend
Sunday Oct 18, 2026
- 70°F
- 54°F
Sunny
- Precip. probability: 15%
- Precipitation: 0"
- Wind: 12mphWNW 297°
- Humidity: 69%
- UV index: 5
- Sunrise: 7:19 am PDT
- Sunset: 6:26 pm PDT
- details ▼
Today, conditions will remain bright with clear skies.
The temperature scale will run from a maximum of an agreeable 69.8°F to a minimum of a fresh 53.6°F.
Today's highest temperature is predicted to match the regular high for October at 72.1°F.
Sunrise will be at 7:19 am and sunset at 6:26 pm; the daylight will last for 11h and 7min.
The temperature scale will run from a maximum of an agreeable 69.8°F to a minimum of a fresh 53.6°F.
Today's highest temperature is predicted to match the regular high for October at 72.1°F.
Sunrise will be at 7:19 am and sunset at 6:26 pm; the daylight will last for 11h and 7min.
10-day overview
Daily temperatures
Warmest period: Friday - Saturday 72°C.
Coldest day: tomorrow 64°C.
Coldest day: tomorrow 64°C.
Chance of precipitation
Highest chance: Wednesday 70%.
Long-term weather forecast
- Sunday
- Oct 18, 2026
- 70°F
- 54°F
Sunny
- Precip. probability: 15%
- Precipitation: 0"
- Wind: 12mphWNW 297°
- Humidity: 69%
- UV index: 5
- Sunrise: 7:19 am PDT
- Sunset: 6:26 pm PDT
- details ▼
- Monday
- Oct 19, 2026
- 64°F
- 52°F
Cloudy
- Precip. probability: 20%
- Precipitation: 0"
- Wind: 13mphW 276°
- Humidity: 63%
- UV index: 5
- Sunrise: 7:20 am PDT
- Sunset: 6:25 pm PDT
- details ▼
- Tuesday
- Oct 20, 2026
- 70°F
- 54°F
Cloudy
- Precip. probability: 11%
- Precipitation: 0.24"
- Wind: 8mphWNW 302°
- Humidity: 62%
- UV index: 3
- Sunrise: 7:21 am PDT
- Sunset: 6:24 pm PDT
- details ▼
- Wednesday
- Oct 21, 2026
- 66°F
- 54°F
Rain
- Precip. probability: 70%
- Precipitation: 0.2"
- Wind: 7mphNNW 346°
- Humidity: 75%
- UV index: 3
- Sunrise: 7:22 am PDT
- Sunset: 6:22 pm PDT
- details ▼
- Thursday
- Oct 22, 2026
- 66°F
- 54°F
Partly Cloudy
- Precip. probability: 24%
- Precipitation: 0"
- Wind: 11mphW 269°
- Humidity: 77%
- UV index: 4
- Sunrise: 7:23 am PDT
- Sunset: 6:21 pm PDT
- details ▼
- Friday
- Oct 23, 2026
- 72°F
- 50°F
Partly Cloudy
- Precip. probability: 12%
- Precipitation: 0"
- Wind: 9mphWNW 299°
- Humidity: 69%
- UV index: 5
- Sunrise: 7:24 am PDT
- Sunset: 6:20 pm PDT
- details ▼
- Saturday
- Oct 24, 2026
- 72°F
- 50°F
Partly Cloudy
- Precip. probability: 18%
- Precipitation: 0"
- Wind: 9mphWNW 288°
- Humidity: 60%
- UV index: 4
- Sunrise: 7:25 am PDT
- Sunset: 6:19 pm PDT
- details ▼
- Sunday
- Oct 25, 2026
- 68°F
- 50°F
Partly Cloudy
- Precip. probability: 24%
- Precipitation: 0"
- Wind: 10mphW 273°
- Humidity: 62%
- UV index: 4
- Sunrise: 7:26 am PDT
- Sunset: 6:17 pm PDT
- details ▼
- Monday
- Oct 26, 2026
- 68°F
- 48°F
Partly Cloudy
- Precip. probability: 20%
- Precipitation: 0"
- Wind: 10mphW 266°
- Humidity: 61%
- UV index: 4
- Sunrise: 7:27 am PDT
- Sunset: 6:16 pm PDT
- details ▼
- Tuesday
- Oct 27, 2026
- 68°F
- 48°F
Mostly Sunny
- Precip. probability: 9%
- Precipitation: 0"
- Wind: 9mphW 267°
- Humidity: 59%
- UV index: 4
- Sunrise: 7:28 am PDT
- Sunset: 6:15 pm PDT
- details ▼
Looking ahead, conditions suggest a period of primarily dull and occasionally clear and rain-filled weather is forecasted.
Rainfall is predicted for Tuesday and Wednesday.
In the upcoming days, the highest temperature will range between 64.4°F and 71.6°F, while fluctuations in the night’s lowest temperature will be minimal, as the minimum temperature will fluctuate between 48.2°F and 53.6°F.
The warmest days will be Friday and Saturday, with a maximum of 71.6°F; Monday will be the coldest day, with the highest temperature of 64.4°F.
Rainfall is predicted for Tuesday and Wednesday.
In the upcoming days, the highest temperature will range between 64.4°F and 71.6°F, while fluctuations in the night’s lowest temperature will be minimal, as the minimum temperature will fluctuate between 48.2°F and 53.6°F.
The warmest days will be Friday and Saturday, with a maximum of 71.6°F; Monday will be the coldest day, with the highest temperature of 64.4°F.
Updated: Oct 18, 2026 @ 12:57:28 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 Union City, clear and sunny conditions are expected.
Today, the maximum temperature will be 69.8°F, while the minimum temperature will be 53.6°F.
Today, the highest temperature will be in line with the average maximum temperature in October. Today, the lowest temperature will be also in line with the average low temperature.
Today, the highest temperature will be in line with the average maximum temperature in October. Today, the lowest temperature will be also in line with the average low temperature.
On Sunday, in Union City, sunrise will be at 7:19 am and sunset at 6:26 pm (PDT).
In Union City, California, today, there will be 11h and 7min of daylight.
