St John weather live forecast

Today's maximum temperature in St John is expected to be 43°F. Select a day from the live weather forecast for St John, New Brunswick, Canada for more weather parameters.

5-day weather forecast updated at 04:00 on Thursday 18th December 2025 GMT

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The 5-day weather forecast for New Brunswick (St John) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

St John weather forecast by day

Below are the detailed weather forecasts for St John for the next 5 days.

St John weather for Thursday 18th December 2025

Expect scattered clouds in St John, New Brunswick with a maximum temperature of 43°F, maximum UV of 1 (Low) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a fresh breeze of 21 mph from the south.

  • 43°F maximum temperature43
    °F maximum temperature
  • 27°F minimum temperature27
    °F minimum temperature
  • Scattered clouds
    scattered clouds
  • 8 hours of bright sunshine8
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 34°F wind chill34
    °F wind chill
  • Fresh breeze of 21 mph from the South21
    mph wind from S

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St John weather for Friday 19th December 2025

Expect mostly cloudy with rain in St John, New Brunswick with a maximum temperature of 54°F and no hours of bright sunshine. There are 10-20 mm of rainfall expected with 99% chance of some rain and a strong breeze of 30 mph from the south.

  • 54°F maximum temperature54
    °F maximum temperature
  • 43°F minimum temperature43
    °F minimum temperature
  • Mostly cloudy with rain
    mostly cloudy with rain
  • No hours of bright sunshine0
    hours of sunshine
  • No UV (maximum) index0
    UV index (None)
  • 99% chance of some rain99
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Strong breeze of 30 mph from the South30
    mph wind from S

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St John weather for Saturday 20th December 2025

Expect cloudy with sleet or snow in St John, New Brunswick with a maximum temperature of 43°F, maximum UV of 1 (Low) and 8 hours of bright sunshine. There are 2-5 mm of sleet/snow expected with 8% chance of some sleet or snow and a fresh breeze of 22 mph from the west.

  • 43°F maximum temperature43
    °F maximum temperature
  • 27°F minimum temperature27
    °F minimum temperature
  • Cloudy with sleet or snow
    cloudy with sleet or snow
  • 8 hours of bright sunshine8
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 8% chance of some sleet or snow8
    % chance of some sleet or snow
  • 2-5 mm of sleet/snow expected<5
    mm of sleet/snow expected
  • 32°F wind chill32
    °F wind chill
  • Fresh breeze of 22 mph from the West22
    mph wind from W

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St John weather for Sunday 21st December 2025

Expect cloudy with sleet or snow in St John, New Brunswick with a maximum temperature of 41°F, maximum UV of 1 (Low) and 2 hours of bright sunshine. There are 5-10 mm of sleet/snow expected with 91% chance of some sleet or snow and a fresh breeze of 18 mph from the south.

  • 41°F maximum temperature41
    °F maximum temperature
  • 28°F minimum temperature28
    °F minimum temperature
  • Cloudy with sleet or snow
    cloudy with sleet or snow
  • 2 hours of bright sunshine2
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 91% chance of some sleet or snow91
    % chance of some sleet or snow
  • 5-10 mm of sleet/snow expected<10
    mm of sleet/snow expected
  • 32°F wind chill32
    °F wind chill
  • Fresh breeze of 18 mph from the South18
    mph wind from S

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St John weather for Monday 22nd December 2025

Expect scattered clouds in St John, New Brunswick with a maximum temperature of 28°F, maximum UV of 1 (Low) and 9 hours of bright sunshine. There are 0 cm of snow expected and a moderate breeze of 17 mph from the north-west.

  • 28°F maximum temperature28
    °F maximum temperature
  • 18°F minimum temperature18
    °F minimum temperature
  • Scattered clouds
    scattered clouds
  • 9 hours of bright sunshine9
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 0 cm of snow expected0
    cm of snow expected
  • 16°F wind chill16
    °F wind chill
  • Moderate breeze of 17 mph from the North-West17
    mph wind from NW

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Metric (°C)  |  Imperial (°F)

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