Weather forecast for tomorrowSaint John Harbor, AK
Weather forecast for tomorrow
Sunday Oct 18, 2026
- 46°F
- 37°F
Rain
- Precip. probability: 99%
- Precipitation: 0.47"
- Wind: 4mphE 100°
- Humidity: 91%
- UV index: 1
- Sunrise: 7:31 am AKDT
- Sunset: 5:42 pm AKDT
- details ▼
Tomorrow, on Sunday, October 18, wet weather is in store, with rain expected on and off.
The likelihood of rainfall is high, and precipitation will be moderate. Modest temperature shifts from a high of a brisk 46.4°F to a low of a wintry 37.4°F are forecasted.
October's usual high of 46°F is forecasted to be matched by the day’s maximum temperature.
Sunrise will be at 7:31 am and sunset at 5:42 pm; tomorrow's daylight will last for 10h and 11min.
The likelihood of rainfall is high, and precipitation will be moderate. Modest temperature shifts from a high of a brisk 46.4°F to a low of a wintry 37.4°F are forecasted.
October's usual high of 46°F is forecasted to be matched by the day’s maximum temperature.
Sunrise will be at 7:31 am and sunset at 5:42 pm; tomorrow's daylight will last for 10h and 11min.
Hourly overview
Hourly temperatures
Maximum temperature: 46°C.
Coldest hour: 9 pm 43°C.
Coldest hour: 9 pm 43°C.
Chance of precipitation
Highest chance: 12 pm 98%.
Hourly weather forecast
- 12 am
- 46°F
- Feels like:45°F
Showers
- Precip. probability: 42%
- Precipitation: 0.04"
- Wind: 6mphS 171°
- Humidity: 88%
- Pressure: 29.94"Hg
- Visibility: 7mi
- UV index: 0
- details ▼
- 2 am
- 46°F
- Feels like:43°F
Rain
- Precip. probability: 80%
- Precipitation: 0.04"
- Wind: 5mphSSE 162°
- Humidity: 89%
- Pressure: 29.97"Hg
- Visibility: 5mi
- UV index: 0
- details ▼
- 4 am
- 46°F
- Feels like:43°F
Rain
- Precip. probability: 82%
- Precipitation: 0.08"
- Wind: 5mphSSE 164°
- Humidity: 90%
- Pressure: 29.97"Hg
- Visibility: 5mi
- UV index: 0
- details ▼
- 6 am
- 45°F
- Feels like:45°F
Rain
- Precip. probability: 81%
- Precipitation: 0.04"
- Wind: 4mphSSE 153°
- Humidity: 90%
- Pressure: 29.97"Hg
- Visibility: 3mi
- UV index: 0
- details ▼
Sunrise: 7:31 am
- 8 am
- 45°F
- Feels like:45°F
Rain
- Precip. probability: 93%
- Precipitation: 0.04"
- Wind: 3mphSE 145°
- Humidity: 91%
- Pressure: 29.97"Hg
- Visibility: 4mi
- UV index: 0
- details ▼
- 10 am
- 46°F
- Feels like:45°F
Rain
- Precip. probability: 98%
- Precipitation: 0.08"
- Wind: 4mphESE 106°
- Humidity: 92%
- Pressure: 29.97"Hg
- Visibility: 3mi
- UV index: 0
- details ▼
- 12 pm
- 46°F
- Feels like:45°F
Rain
- Precip. probability: 98%
- Precipitation: 0.12"
- Wind: 4mphE 92°
- Humidity: 93%
- Pressure: 29.97"Hg
- Visibility: 2mi
- UV index: 1
- details ▼
- 2 pm
- 46°F
- Feels like:46°F
Rain
- Precip. probability: 89%
- Precipitation: 0.04"
- Wind: 2mphE 89°
- Humidity: 91%
- Pressure: 30"Hg
- Visibility: 4mi
- UV index: 0
- details ▼
- 4 pm
- 46°F
- Feels like:46°F
Showers
- Precip. probability: 56%
- Precipitation: 0.04"
- Wind: 2mphNE 52°
- Humidity: 90%
- Pressure: 30"Hg
- Visibility: 4mi
- UV index: 0
- details ▼
Sunset: 5:42 pm
- 6 pm
- 45°F
- Feels like:45°F
Few Showers
- Precip. probability: 31%
- Precipitation: 0.04"
- Wind: 1mphENE 79°
- Humidity: 92%
- Pressure: 30"Hg
- Visibility: 4mi
- UV index: 0
- details ▼
- 8 pm
- 43°F
- Feels like:43°F
Partly Cloudy
- Precip. probability: 24%
- Precipitation: 0"
- Wind: 1mphWNW 303°
- Humidity: 94%
- Pressure: 30.03"Hg
- Visibility: 4mi
- UV index: 0
- details ▼
- 10 pm
- 43°F
- Feels like:43°F
Partly Cloudy
- Precip. probability: 12%
- Precipitation: 0"
- Wind: 1mphNNE 20°
- Humidity: 93%
- Pressure: 30.03"Hg
- Visibility: 4mi
- UV index: 0
- details ▼
Tomorrow, on Sunday, primarily showery and occasionally overcast weather is predicted.
Rainfall is expected practically throughout the entire day. With light precipitation of 0.12", the most intense rain will be falling at 5 am and 12 pm.
The temperature difference will be unnoticeable, with the lowest temperature of 42.8°F and the highest temperature of 46.4°F. The warmest part of the day will be from midnight to 5 am, and from 10 am to 5 pm.
The maximum temperature will be close to October's average highest temperature of 46°F. Tomorrow, the lowest temperature will be also close to October's usual minimum.
Rainfall is expected practically throughout the entire day. With light precipitation of 0.12", the most intense rain will be falling at 5 am and 12 pm.
The temperature difference will be unnoticeable, with the lowest temperature of 42.8°F and the highest temperature of 46.4°F. The warmest part of the day will be from midnight to 5 am, and from 10 am to 5 pm.
The maximum temperature will be close to October's average highest temperature of 46°F. Tomorrow, the lowest temperature will be also close to October's usual minimum.
Updated: Oct 18, 2026 @ 01:31:09 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
Tomorrow, expect rainy conditions throughout the day.
Moderate precipitation of 0.47" is anticipated. The possibility of rainfall is high at 99%.
Tomorrow, the maximum temperature will be 46.4°F, while the minimum temperature will be 37.4°F.
The highest temperature tomorrow will be in line with the average maximum temperature in October. The lowest temperature will be also in line with the average low of 39.7°F.
The highest temperature tomorrow will be in line with the average maximum temperature in October. The lowest temperature will be also in line with the average low of 39.7°F.
On Sunday, in Saint John Harbor, sunrise will be at 7:31 am and sunset at 5:42 pm (AKDT).
In Saint John Harbor, tomorrow, there will be 10h and 11min of daylight.
