Weather forecast for tomorrowHappy Valley, OR

Weather forecast for tomorrow

Sunday Oct 18, 2026

  • 68°F
  • 46°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 20%
  • Precipitation: 0"
  • Wind: 7mphN 10°
  • Humidity: 63%
  • UV index: 3
  • Sunrise: 7:30 am PDT
  • Sunset: 6:19 pm PDT
  • ▼
On Sunday, October 18, thin clouds will pass through at times, but overall, it will remain bright.
Temperatures are predicted to peak at a pleasant 68°F and drop to a minimum of a chilly 46.4°F.
The expected high will be relatively higher than October's standard temperature of 61.9°F.
Sunrise will be at 7:30 am and sunset at 6:19 pm; tomorrow's daylight will last for 10h and 49min.

Hourly overview

Hourly temperatures

Warmest period: 3 pm - 6 pm 64°C.
Coldest hour: 6 am 41°C.

Chance of precipitation

Highest chance: 6 am 21%.

Hourly weather forecast

  • 12 am
  • 50°F
  • Feels like:
    48°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 6%
  • Precipitation: 0"
  • Wind: 4mphN 1°
  • Humidity: 80%
  • Pressure: 30.21"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 2 am
  • 46°F
  • Feels like:
    46°F
Mostly Clear
Mostly Clear
  • Precip. probability: 7%
  • Precipitation: 0"
  • Wind: 3mphN 6°
  • Humidity: 90%
  • Pressure: 30.18"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 4 am
  • 43°F
  • Feels like:
    43°F
Clear
Clear
  • Precip. probability: 8%
  • Precipitation: 0"
  • Wind: 2mphNE 37°
  • Humidity: 95%
  • Pressure: 30.15"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 6 am
  • 41°F
  • Feels like:
    41°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 21%
  • Precipitation: 0"
  • Wind: 3mphNE 43°
  • Humidity: 100%
  • Pressure: 30.15"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunrise: 7:30 am
  • 8 am
  • 41°F
  • Feels like:
    41°F
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 21%
  • Precipitation: 0"
  • Wind: 3mphNE 37°
  • Humidity: 99%
  • Pressure: 30.15"Hg
  • Visibility: 9mi
  • UV index: 0
  • ▼
  • 10 am
  • 48°F
  • Feels like:
    46°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 18%
  • Precipitation: 0"
  • Wind: 4mphNNE 29°
  • Humidity: 82%
  • Pressure: 30.12"Hg
  • Visibility: 10mi
  • UV index: 1
  • ▼
  • 12 pm
  • 55°F
  • Feels like:
    55°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 6mphN 0°
  • Humidity: 61%
  • Pressure: 30.06"Hg
  • Visibility: 10mi
  • UV index: 3
  • ▼
  • 2 pm
  • 63°F
  • Feels like:
    63°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 7mphN 3°
  • Humidity: 46%
  • Pressure: 30"Hg
  • Visibility: 10mi
  • UV index: 3
  • ▼
  • 4 pm
  • 66°F
  • Feels like:
    66°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 6mphN 353°
  • Humidity: 37%
  • Pressure: 29.94"Hg
  • Visibility: 10mi
  • UV index: 1
  • ▼
  • 6 pm
  • 64°F
  • Feels like:
    64°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 5mphNNW 343°
  • Humidity: 41%
  • Pressure: 29.91"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunset: 6:19 pm
  • 8 pm
  • 57°F
  • Feels like:
    57°F
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 2mphNW 319°
  • Humidity: 55%
  • Pressure: 29.91"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 10 pm
  • 54°F
  • Feels like:
    54°F
Cloudy
Cloudy
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 2mphSE 125°
  • Humidity: 64%
  • Pressure: 29.91"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Tomorrow, primarily dull and occasionally bright weather is predicted.
The temperature will vary between a minimum of 41°F and a maximum of 66.2°F. The warmest part of the day will be at 4 pm and 5 pm.
The highest temperature tomorrow will be relatively higher than October's typical maximum temperature. The night temperature will be also comparable to the standard October low of 45.5°F.
Updated: Oct 17, 2026 @ 18:36:29 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

Tomorrow, in Happy Valley, moments of sunshine will break through the patchy clouds.

Tomorrow, the highest temperature will be 68°F, while the lowest temperature will be 46.4°F.
Tomorrow, the highest temperature will be moderately higher than the average maximum temperature in October. The lowest temperature tomorrow will be in line with the average low temperature.

On Sunday, in Happy Valley, sunrise will be at 7:30 am and sunset at 6:19 pm (PDT).

In Happy Valley, tomorrow, there will be 10h and 49min of daylight.