Weather forecast for tomorrowSaint John, Canada

Weather forecast for tomorrow

Sunday 18. Oct 2026

  • 10°C
  • 3°C
Mostly Sunny
Mostly Sunny
  • Precip. probability: 1%
  • Precipitation: 0mm
  • Wind: 13km/hW 269°
  • Humidity: 53%
  • UV index: 3
  • Sunrise: 7:44 am ADT
  • Sunset: 6:34 pm ADT
  • ▼
Tomorrow, clear skies with only minor cloud interruptions are also in the outlook.
Temperature is expected to swing from a high of a cool 10°C to a low of a cold 3°C.
The temperature is anticipated to be moderately lower than the standard October peak of 12.5°C.
Sunrise will be at 7:44 am and sunset at 6:34 pm; tomorrow's daylight will last for 10h and 50min.

Hourly overview

Hourly temperatures

Warmest hour: 3 pm 9°C.
Coldest period: 3 am - 6 am 0°C.

Chance of precipitation

Highest chance: 9 pm 4%.

Hourly weather forecast

  • 12 am
  • 1°C
  • Feels like:
    -3°C
Clear
Clear
  • Precip. probability: 0%
  • Precipitation: 0mm
  • Wind: 12km/hNW 309°
  • Humidity: 58%
  • Pressure: 1025mbar
  • Visibility: 16km
  • UV index: 0
  • ▼
  • 2 am
  • 0°C
  • Feels like:
    -3°C
Clear
Clear
  • Precip. probability: 0%
  • Precipitation: 0mm
  • Wind: 11km/hWNW 302°
  • Humidity: 63%
  • Pressure: 1026mbar
  • Visibility: 16km
  • UV index: 0
  • ▼
  • 4 am
  • 0°C
  • Feels like:
    -4°C
Clear
Clear
  • Precip. probability: 1%
  • Precipitation: 0mm
  • Wind: 12km/hWNW 299°
  • Humidity: 66%
  • Pressure: 1027mbar
  • Visibility: 16km
  • UV index: 0
  • ▼
  • 6 am
  • 0°C
  • Feels like:
    -3°C
Clear
Clear
  • Precip. probability: 1%
  • Precipitation: 0mm
  • Wind: 10km/hWNW 297°
  • Humidity: 66%
  • Pressure: 1029mbar
  • Visibility: 16km
  • UV index: 0
  • ▼
Sunrise: 7:44 am
  • 8 am
  • 0°C
  • Feels like:
    -3°C
Sunny
Sunny
  • Precip. probability: 1%
  • Precipitation: 0mm
  • Wind: 8km/hWNW 291°
  • Humidity: 67%
  • Pressure: 1031mbar
  • Visibility: 16km
  • UV index: 0
  • ▼
  • 10 am
  • 3°C
  • Feels like:
    0°C
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0mm
  • Wind: 12km/hWNW 292°
  • Humidity: 57%
  • Pressure: 1032mbar
  • Visibility: 16km
  • UV index: 1
  • ▼
  • 12 pm
  • 7°C
  • Feels like:
    4°C
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0mm
  • Wind: 13km/hW 276°
  • Humidity: 46%
  • Pressure: 1033mbar
  • Visibility: 16km
  • UV index: 3
  • ▼
  • 2 pm
  • 8°C
  • Feels like:
    6°C
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0mm
  • Wind: 13km/hW 260°
  • Humidity: 44%
  • Pressure: 1032mbar
  • Visibility: 16km
  • UV index: 3
  • ▼
  • 4 pm
  • 9°C
  • Feels like:
    8°C
Mostly Sunny
Mostly Sunny
  • Precip. probability: 0%
  • Precipitation: 0mm
  • Wind: 12km/hWSW 248°
  • Humidity: 45%
  • Pressure: 1032mbar
  • Visibility: 16km
  • UV index: 1
  • ▼
  • 6 pm
  • 8°C
  • Feels like:
    7°C
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0mm
  • Wind: 10km/hSW 223°
  • Humidity: 57%
  • Pressure: 1033mbar
  • Visibility: 16km
  • UV index: 0
  • ▼
Sunset: 6:34 pm
  • 8 pm
  • 6°C
  • Feels like:
    4°C
Clear
Clear
  • Precip. probability: 3%
  • Precipitation: 0mm
  • Wind: 7km/hSW 220°
  • Humidity: 71%
  • Pressure: 1034mbar
  • Visibility: 16km
  • UV index: 0
  • ▼
  • 10 pm
  • 5°C
  • Feels like:
    3°C
Clear
Clear
  • Precip. probability: 4%
  • Precipitation: 0mm
  • Wind: 7km/hSSW 210°
  • Humidity: 79%
  • Pressure: 1034mbar
  • Visibility: 16km
  • UV index: 0
  • ▼
Tomorrow, a combination of clear and dull weather is predicted.
The temperature will vary between the lowest temperature of 0°C and the highest temperature of 9°C. The feels-like temperature will vary between a minimum of -4°C and a maximum of 8°C. The warmest part of the day will be from 3 pm to 5 pm.
Tomorrow, the temperature is expected to be a few degrees lower than October's normal maximum of 12.5°C. The expected low will be more in line with what’s common in November than the current October average of 6.9°C.
Updated: Oct 17, 2026 @ 14:21:23 UTC
Published by: Weather Atlas | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

On Sunday, sunny intervals will be long-lasting, with few disruptions.

Tomorrow, the highest temperature will be 10°C, while the lowest temperature will be 3°C.
Tomorrow, the highest temperature will be a few degrees lower than the average maximum temperature in October. The lowest temperature will be also slightly cooler than the average low of 6.9°C.

On Sunday, in Saint John, sunrise will be at 7:44 am and sunset at 6:34 pm (ADT).

Tomorrow, the daylight will last for 10h and 50min.