Weather forecast for tomorrowSaint John, VI

Weather forecast for tomorrow

Sunday Oct 18, 2026

  • 86°F
  • 77°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 23%
  • Precipitation: 0"
  • Wind: 8mphSE 139°
  • Humidity: 71%
  • UV index: 10
  • Sunrise: 6:13 am AST
  • Sunset: 5:54 pm AST
  • ▼
Tomorrow, on Sunday, partly cloudy skies will persist, making for a mix of sun and clouds.
Minor variations in temperature are expected, peaking at a humid 86°F and slightly dropping to a low of a warm 77°F.
The maximum heat index, which represents the influence of relative humidity on air temperature, is appraised at a sizzling 95°F. Note that heat index values are valued for light wind and location in the shade. Bear in mind that direct sunshine exposure increases weather impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees.
The expected daily high is projected to match October's typical maximum of 86°F.
Sunrise will be at 6:13 am and sunset at 5:54 pm; tomorrow's daylight will last for 11h and 41min.

Hourly overview

Hourly temperatures

Warmest period: 12 pm - 3 pm 91°C.
Coldest period: 3 am - 6 am 82°C.

Chance of precipitation

Highest chance: 3 am 46%.

Hourly weather forecast

  • 12 am
  • 79°F
  • Feels like:
    84°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 17%
  • Precipitation: 0"
  • Wind: 4mphESE 116°
  • Humidity: 81%
  • Pressure: 29.94"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 2 am
  • 79°F
  • Feels like:
    84°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 24%
  • Precipitation: 0"
  • Wind: 3mphSE 125°
  • Humidity: 82%
  • Pressure: 29.91"Hg
  • Visibility: 9mi
  • UV index: 0
  • ▼
  • 4 am
  • 79°F
  • Feels like:
    82°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 24%
  • Precipitation: 0"
  • Wind: 3mphSSE 159°
  • Humidity: 83%
  • Pressure: 29.91"Hg
  • Visibility: 9mi
  • UV index: 0
  • ▼
  • 6 am
  • 77°F
  • Feels like:
    82°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 8%
  • Precipitation: 0"
  • Wind: 2mphSSE 150°
  • Humidity: 84%
  • Pressure: 29.91"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunrise: 6:13 am
  • 8 am
  • 81°F
  • Feels like:
    86°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 13%
  • Precipitation: 0"
  • Wind: 6mphSE 135°
  • Humidity: 76%
  • Pressure: 29.94"Hg
  • Visibility: 10mi
  • UV index: 2
  • ▼
  • 10 am
  • 84°F
  • Feels like:
    90°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 9%
  • Precipitation: 0"
  • Wind: 6mphSE 144°
  • Humidity: 70%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 7
  • ▼
  • 12 pm
  • 84°F
  • Feels like:
    91°F
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 11%
  • Precipitation: 0"
  • Wind: 8mphSE 143°
  • Humidity: 67%
  • Pressure: 29.94"Hg
  • Visibility: 10mi
  • UV index: 10
  • ▼
  • 2 pm
  • 86°F
  • Feels like:
    91°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 13%
  • Precipitation: 0"
  • Wind: 8mphSE 141°
  • Humidity: 66%
  • Pressure: 29.91"Hg
  • Visibility: 10mi
  • UV index: 8
  • ▼
  • 4 pm
  • 84°F
  • Feels like:
    91°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 14%
  • Precipitation: 0"
  • Wind: 7mphSE 136°
  • Humidity: 68%
  • Pressure: 29.88"Hg
  • Visibility: 10mi
  • UV index: 2
  • ▼
Sunset: 5:54 pm
  • 6 pm
  • 81°F
  • Feels like:
    88°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 5%
  • Precipitation: 0"
  • Wind: 6mphSE 125°
  • Humidity: 75%
  • Pressure: 29.91"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 8 pm
  • 81°F
  • Feels like:
    86°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 5%
  • Precipitation: 0"
  • Wind: 5mphESE 107°
  • Humidity: 78%
  • Pressure: 29.91"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 10 pm
  • 81°F
  • Feels like:
    86°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 8%
  • Precipitation: 0"
  • Wind: 4mphESE 103°
  • Humidity: 80%
  • Pressure: 29.91"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Tomorrow, on Sunday, primarily cloudy and occasionally rainy weather is forecasted.
Rainfall is forecasted at 1 am and 3 am. With light precipitation of 0.12", most rainfall is expected at 3 am.
The temperature will be between the lowest temperature of 77°F and the highest temperature of 86°F. The hottest part of the day will be around 2 pm.
The maximum temperature will be similar to October's average highest temperature of 86°F. The temperature low is forecasted to be also resembling the usual October value of 75.2°F.
Updated: Oct 17, 2026 @ 13:00:05 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

Tomorrow, changing cloud patterns will allow for periods of sunshine.

Tomorrow, the maximum temperature will be 86°F, while the minimum temperature will be 77°F. The maximum heat index, which factors the actual air temperature with the relative humidity, is evaluated at 95°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 75.2°F.

On Sunday, in Saint John, sunrise will be at 6:13 am and sunset at 5:54 pm (AST).

In Saint John, United States Virgin Islands, the length of the day tomorrow will be 11h and 41min.