Weather forecast for tomorrowWainaku, HI

Weather forecast for tomorrow

Sunday Oct 18, 2026

  • 81°F
  • 72°F
Showers
Showers
  • Precip. probability: 68%
  • Precipitation: 0.83"
  • Wind: 10mphN 11°
  • Humidity: 81%
  • UV index: 10
  • Sunrise: 6:16 am HST
  • Sunset: 5:54 pm HST
  • ▼
On Sunday, October 18, showers will occur, with brief dry spells in between.
Elevated precipitation of 0.83" is predicted for tomorrow. Day and night temperatures will subtly differ, ranging from a peak of a moderately hot 80.6°F to a low of a delightful 71.6°F.
The maximum heat index, which combines air temperature and relative humidity, is computed to be a humid 86°F. Note that heat index values are valued for light wind and location in the shade.
The daily maximum temperature is forecasted to be a few degrees higher than October's climate average of 74.7°F.
Sunrise will be at 6:16 am and sunset at 5:54 pm; tomorrow's daylight will last for 11h and 38min.

Hourly overview

Hourly temperatures

Warmest period: 12 pm - 3 pm 84°C.
Coldest period: 3 am - 6 am 73°C.

Chance of precipitation

Highest chance: 6 pm 62%.

Hourly weather forecast

  • 12 am
  • 72°F
  • Feels like:
    75°F
Showers
Showers
  • Precip. probability: 52%
  • Precipitation: 0.04"
  • Wind: 5mphW 265°
  • Humidity: 89%
  • Pressure: 30.03"Hg
  • Visibility: 6mi
  • UV index: 0
  • ▼
  • 2 am
  • 72°F
  • Feels like:
    73°F
Showers
Showers
  • Precip. probability: 55%
  • Precipitation: 0.04"
  • Wind: 4mphWSW 258°
  • Humidity: 87%
  • Pressure: 30"Hg
  • Visibility: 7mi
  • UV index: 0
  • ▼
  • 4 am
  • 72°F
  • Feels like:
    73°F
Showers
Showers
  • Precip. probability: 49%
  • Precipitation: 0.04"
  • Wind: 5mphW 260°
  • Humidity: 90%
  • Pressure: 30"Hg
  • Visibility: 6mi
  • UV index: 0
  • ▼
  • 6 am
  • 72°F
  • Feels like:
    73°F
Showers
Showers
  • Precip. probability: 50%
  • Precipitation: 0.04"
  • Wind: 6mphW 270°
  • Humidity: 90%
  • Pressure: 30.03"Hg
  • Visibility: 7mi
  • UV index: 0
  • ▼
Sunrise: 6:16 am
  • 8 am
  • 75°F
  • Feels like:
    77°F
Few Showers
Few Showers
  • Precip. probability: 33%
  • Precipitation: 0.04"
  • Wind: 6mphWNW 290°
  • Humidity: 85%
  • Pressure: 30.06"Hg
  • Visibility: 7mi
  • UV index: 1
  • ▼
  • 10 am
  • 79°F
  • Feels like:
    82°F
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 24%
  • Precipitation: 0"
  • Wind: 7mphN 0°
  • Humidity: 77%
  • Pressure: 30.09"Hg
  • Visibility: 9mi
  • UV index: 6
  • ▼
  • 12 pm
  • 81°F
  • Feels like:
    84°F
Showers
Showers
  • Precip. probability: 40%
  • Precipitation: 0.04"
  • Wind: 8mphNNE 32°
  • Humidity: 76%
  • Pressure: 30.06"Hg
  • Visibility: 7mi
  • UV index: 10
  • ▼
  • 2 pm
  • 79°F
  • Feels like:
    84°F
Showers
Showers
  • Precip. probability: 45%
  • Precipitation: 0.04"
  • Wind: 9mphNE 36°
  • Humidity: 79%
  • Pressure: 30"Hg
  • Visibility: 4mi
  • UV index: 6
  • ▼
  • 4 pm
  • 79°F
  • Feels like:
    82°F
Showers
Showers
  • Precip. probability: 66%
  • Precipitation: 0.04"
  • Wind: 8mphNNE 29°
  • Humidity: 81%
  • Pressure: 30"Hg
  • Visibility: 2mi
  • UV index: 1
  • ▼
Sunset: 5:54 pm
  • 6 pm
  • 75°F
  • Feels like:
    81°F
Showers
Showers
  • Precip. probability: 62%
  • Precipitation: 0.08"
  • Wind: 6mphNNE 19°
  • Humidity: 87%
  • Pressure: 30.03"Hg
  • Visibility: 4mi
  • UV index: 0
  • ▼
  • 8 pm
  • 75°F
  • Feels like:
    79°F
Showers
Showers
  • Precip. probability: 63%
  • Precipitation: 0.08"
  • Wind: 6mphWNW 301°
  • Humidity: 89%
  • Pressure: 30.06"Hg
  • Visibility: 2mi
  • UV index: 0
  • ▼
  • 10 pm
  • 73°F
  • Feels like:
    77°F
Showers
Showers
  • Precip. probability: 62%
  • Precipitation: 0.08"
  • Wind: 6mphWSW 256°
  • Humidity: 89%
  • Pressure: 30.06"Hg
  • Visibility: 2mi
  • UV index: 0
  • ▼
Tomorrow, a combination of showery and gloomy weather is predicted.
Rain is anticipated from 12 am to 8 am, and from 11 am to 11 pm. With light precipitation of 0.12", most rainfall is expected at 7 pm.
The temperature will vary between a minimum of 71.6°F and a maximum of 80.6°F. The warmest part of the day will be from 11 am to 1 pm.
The highest temperature tomorrow will be relatively higher than October's typical maximum temperature. Tomorrow, the lowest temperature will be also close to October's usual minimum.
Updated: Oct 17, 2026 @ 14:17:01 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

Tomorrow, showers are expected to spread throughout the day, with the heaviest rain expected in the morning.

Yes, it will rain tomorrow in Wainaku. High precipitation of 0.83" is expected.

Tomorrow, the highest temperature will be 80.6°F, while the lowest temperature will be 71.6°F. The maximum heat index, which integrates air moisture with ambient temperature, is calculated to be 86°F.
The maximum temperature will be moderately higher than the average highest temperature of 74.7°F in October. Tomorrow, the lowest temperature will be in line with the average low temperature.

On Sunday, in Wainaku, sunrise will be at 6:16 am and sunset at 5:54 pm (HST).

In Wainaku, tomorrow, there will be 11h and 38min of daylight.