Weather forecast for 10 daysUnion, WA
Weather forecast for the weekend
Saturday Oct 17, 2026
- 64°F
- 37°F
Partly Cloudy
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 7mphSE 136°
- Humidity: 58%
- UV index: 3
- Sunrise: 7:34 am PDT
- Sunset: 6:21 pm PDT
- details ▼
Today, in Union, the sky will feature a blend of clouds and sunshine.
Dramatic temperature shifts from a high of a breezy 64.4°F to a low of a cold 37.4°F are anticipated.
Today, the temperature forecast of 64.4°F will better match September's climate average than that of October.
Sunrise was at 7:34 am and sunset will be at 6:21 pm; the daylight will last for 10h and 47min.
Dramatic temperature shifts from a high of a breezy 64.4°F to a low of a cold 37.4°F are anticipated.
Today, the temperature forecast of 64.4°F will better match September's climate average than that of October.
Sunrise was at 7:34 am and sunset will be at 6:21 pm; the daylight will last for 10h and 47min.
Sunday Oct 18, 2026
- 63°F
- 43°F
Partly Cloudy
- Precip. probability: 22%
- Precipitation: 0"
- Wind: 9mphNE 41°
- Humidity: 69%
- UV index: 3
- Sunrise: 7:35 am PDT
- Sunset: 6:19 pm PDT
- details ▼
Tomorrow, on Sunday, scattered clouds may briefly filter the sunlight, but it will remain bright overall.
The temperature is forecasted to vary between a comfortable 62.6°F and a chilly 42.8°F.
Tomorrow's high is forecasted to be slightly warmer than the average high in October of 57.6°F.
Sunrise will be at 7:35 am and sunset at 6:19 pm; tomorrow's daylight will last for 10h and 43min.
The temperature is forecasted to vary between a comfortable 62.6°F and a chilly 42.8°F.
Tomorrow's high is forecasted to be slightly warmer than the average high in October of 57.6°F.
Sunrise will be at 7:35 am and sunset at 6:19 pm; tomorrow's daylight will last for 10h and 43min.
10-day overview
Daily temperatures
Warmest period: Tuesday - Wednesday 66°C.
Coldest day: Saturday 24.10. 55°C.
Coldest day: Saturday 24.10. 55°C.
Chance of precipitation
Highest chance: Saturday 24.10. 48%.
Long-term weather forecast
- Saturday
- Oct 17, 2026
- 64°F
- 37°F
Partly Cloudy
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 7mphSE 136°
- Humidity: 58%
- UV index: 3
- Sunrise: 7:34 am PDT
- Sunset: 6:21 pm PDT
- details ▼
- Sunday
- Oct 18, 2026
- 63°F
- 43°F
Partly Cloudy
- Precip. probability: 22%
- Precipitation: 0"
- Wind: 9mphNE 41°
- Humidity: 69%
- UV index: 3
- Sunrise: 7:35 am PDT
- Sunset: 6:19 pm PDT
- details ▼
- Monday
- Oct 19, 2026
- 63°F
- 37°F
AM Clouds / PM Sun
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 6mphSW 215°
- Humidity: 69%
- UV index: 2
- Sunrise: 7:37 am PDT
- Sunset: 6:17 pm PDT
- details ▼
- Tuesday
- Oct 20, 2026
- 66°F
- 41°F
Sunny
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 8mphNE 51°
- Humidity: 67%
- UV index: 3
- Sunrise: 7:38 am PDT
- Sunset: 6:15 pm PDT
- details ▼
- Wednesday
- Oct 21, 2026
- 66°F
- 43°F
Sunny
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 4mphSSW 202°
- Humidity: 66%
- UV index: 3
- Sunrise: 7:40 am PDT
- Sunset: 6:13 pm PDT
- details ▼
- Thursday
- Oct 22, 2026
- 59°F
- 41°F
Partly Cloudy
- Precip. probability: 24%
- Precipitation: 0"
- Wind: 7mphSW 223°
- Humidity: 82%
- UV index: 2
- Sunrise: 7:41 am PDT
- Sunset: 6:12 pm PDT
- details ▼
- Friday
- Oct 23, 2026
- 57°F
- 41°F
Partly Cloudy
- Precip. probability: 21%
- Precipitation: 0.04"
- Wind: 7mphWSW 239°
- Humidity: 76%
- UV index: 2
- Sunrise: 7:43 am PDT
- Sunset: 6:10 pm PDT
- details ▼
- Saturday
- Oct 24, 2026
- 55°F
- 43°F
Showers
- Precip. probability: 48%
- Precipitation: 0.16"
- Wind: 7mphENE 62°
- Humidity: 72%
- UV index: 2
- Sunrise: 7:44 am PDT
- Sunset: 6:08 pm PDT
- details ▼
- Sunday
- Oct 25, 2026
- 59°F
- 41°F
Partly Cloudy
- Precip. probability: 19%
- Precipitation: 0"
- Wind: 7mphENE 67°
- Humidity: 71%
- UV index: 2
- Sunrise: 7:46 am PDT
- Sunset: 6:06 pm PDT
- details ▼
- Monday
- Oct 26, 2026
- 59°F
- 41°F
Partly Cloudy
- Precip. probability: 24%
- Precipitation: 0"
- Wind: 6mphSW 222°
- Humidity: 77%
- UV index: 2
- Sunrise: 7:47 am PDT
- Sunset: 6:05 pm PDT
- details ▼
Looking ahead, conditions suggest a period of primarily overcast and occasionally dry and sunny and rainy weather is anticipated.
Rainfall is predicted for Friday and next Saturday.
In the upcoming period, the maximum temperature will vary between 55.4°F and 66.2°F, while fluctuations in the night’s lowest temperature will be minimal, as the minimum temperature will fluctuate between 37.4°F and 42.8°F.
Tuesday and Wednesday, with the highest temperature of 66.2°F, will be the warmest days; expect the coldest day on next Saturday with a high of 55.4°F.
Rainfall is predicted for Friday and next Saturday.
In the upcoming period, the maximum temperature will vary between 55.4°F and 66.2°F, while fluctuations in the night’s lowest temperature will be minimal, as the minimum temperature will fluctuate between 37.4°F and 42.8°F.
Tuesday and Wednesday, with the highest temperature of 66.2°F, will be the warmest days; expect the coldest day on next Saturday with a high of 55.4°F.
Updated: Oct 17, 2026 @ 21:17:29 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
On Saturday, mostly clear with scattered clouds is expected.
Today, the maximum temperature in Union will be 64.4°F, while the minimum temperature will be 37.4°F.
The maximum temperature will be moderately higher than the average highest temperature of 57.6°F in October. Today, the lowest temperature will be also a couple of degrees lower than the average low temperature.
The maximum temperature will be moderately higher than the average highest temperature of 57.6°F in October. Today, the lowest temperature will be also a couple of degrees lower than the average low temperature.
On Saturday, in Union, sunrise was at 7:34 am and sunset will be at 6:21 pm (PDT).
Today, the daylight will last for 10h and 47min.
Tomorrow, in Union, a partly cloudy outlook will keep the sky interesting throughout the day.
Tomorrow, the maximum temperature will be 62.6°F, while the minimum temperature will be 42.8°F.
The highest temperature tomorrow will be a couple of degrees higher than the average maximum temperature in October. Tomorrow, the lowest temperature will be in line with the average low temperature.
The highest temperature tomorrow will be a couple of degrees higher than the average maximum temperature in October. Tomorrow, the lowest temperature will be in line with the average low temperature.
On Sunday, in Union, sunrise will be at 7:35 am and sunset at 6:19 pm (PDT).
In Union, the length of the day tomorrow will be 10h and 43min.





