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Saint John, NB

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HEAT WARNING

A period of very hot and humid weather is expected. Time span: Tuesday through Thursday. Maximum temperature Tuesday: near 30 degrees Celsius (Humidex 35) Minimum temperature Tuesday night: 18 to 20 degrees Celsius. Maximum temperature Wednesday: 30 to 33 degrees Celsius (Humidex 40) Minimum temperature Wednesday night: 22 to 24 degrees Celsius. Maximum temperature Thursday: 30 to 33 degrees Celsius (Humidex 40) Minimum temperature Thursday night: 17 to 20 degrees Celsius. Locations: New Brunswick Remarks: hot conditions could possibly continue into Friday, especially over central and southwestern areas of the province. Extreme heat can affect everyone’s health. Drink plenty of water regularly, even before you feel thirsty to decrease your risk of dehydration. Thirst is not a good indicator of dehydration. Watch for early signs of heat illness (feeling unwell, fatigue, thirst, headache) as these can rapidly evolve into life-threatening emergencies. Move to a cooler environment immediately, such as a shaded or air-conditioned space. All workers should take regularly scheduled breaks in a cool or shaded space. Heat warnings are issued when very high temperature or humidity conditions are expected to pose an elevated risk of heat illnesses, such as heat stroke or heat exhaustion. Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to NBstorm@ec.gc.ca or tweet reports using #NBStorm.

In effect for:
  • Saint John and County
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Current ConditionsObserved at: Saint John Airport

Partly Cloudy

Partly Cloudy

5°C

Wind:
SSW 4 km/h
More details
Temperature:
5.1°C
Pressure:
102.3 kPa
Dew point:
5.0°C
Visibility:
24 km
Humidity:
99%
Date:
Observed at:
Saint John Airport
Past 24 hour Conditions
Weather Radar
Satellite
Lightning
Alerts
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Hourly Forecast
Air Quality
Historical Weather

ForecastForecast issued:

HEAT WARNING

A period of very hot and humid weather is expected. Time span: Tuesday through Thursday. Maximum temperature Tuesday: near 30 degrees Celsius (Humidex 35) Minimum temperature Tuesday night: 18 to 20 degrees Celsius. Maximum temperature Wednesday: 30 to 33 degrees Celsius (Humidex 40) Minimum temperature Wednesday night: 22 to 24 degrees Celsius. Maximum temperature Thursday: 30 to 33 degrees Celsius (Humidex 40) Minimum temperature Thursday night: 17 to 20 degrees Celsius. Locations: New Brunswick Remarks: hot conditions could possibly continue into Friday, especially over central and southwestern areas of the province. Extreme heat can affect everyone’s health. Drink plenty of water regularly, even before you feel thirsty to decrease your risk of dehydration. Thirst is not a good indicator of dehydration. Watch for early signs of heat illness (feeling unwell, fatigue, thirst, headache) as these can rapidly evolve into life-threatening emergencies. Move to a cooler environment immediately, such as a shaded or air-conditioned space. All workers should take regularly scheduled breaks in a cool or shaded space. Heat warnings are issued when very high temperature or humidity conditions are expected to pose an elevated risk of heat illnesses, such as heat stroke or heat exhaustion. Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to NBstorm@ec.gc.ca or tweet reports using #NBStorm.

In effect for:
  • Saint John and County
Follow:

Detailed ForecastForecast issued:

Increasing cloudiness
Today
14°C
Increasing cloudiness. Wind becoming southwest 20 km/h gusting to 40 this morning. High 14 except 19 inland. UV index 8 or very high.
Mainly cloudy
Tonight
12°C
Mainly cloudy. Wind southwest 20 km/h. Low 12.
Mainly sunny
Tue, 18 Jun
29°C
Mainly sunny. Wind southwest 20 km/h gusting to 40. High 29. Humidex 34. UV index 9 or very high.
Night:Cloudy periods. Low 17.
A mix of sun and cloud
Wed, 19 Jun
30°C
A mix of sun and cloud. High 30 except 20 along parts of the coast.
Night:Cloudy periods. Low 17.
A mix of sun and cloud
Thu, 20 Jun
30°C
A mix of sun and cloud. High 30 except 20 along parts of the coast.
Night:Cloudy periods with 30 percent chance of showers. Low 18.
A mix of sun and cloud
Fri, 21 Jun
26°C
A mix of sun and cloud. High 26.
Night:Cloudy periods. Low 12.
A mix of sun and cloud
Sat, 22 Jun
21°C
A mix of sun and cloud. High 21.
Night:Cloudy with 60 percent chance of showers. Low 12.
Chance of showers
Sun, 23 Jun
20°C
Cloudy with 60 percent chance of showers. High 20.
Normals:
Max20°C.Min10°C.
Sunrise:
5:36 ADT
Sunset:
21:15 ADT

Averages and extremes

17 Jun
Average high
  • 19.7°C
Average low
  • 8.7°C
Highest temperature (1947-2011)
  • 27.2°C
  • 1979
Lowest temperature (1947-2011)
  • 1.7°C
  • 1948
Greatest precipitation (1947-2011)
  • 42.7 mm
  • 1959
Greatest rainfall (1947-2011)
  • 42.7 mm
  • 1959
Greatest snowfall (1947-2011)
  • 0.0 cm
Most snow on the ground (1955-2007)
  • 0.0 cm
Monthly frequency of precipitation
  • 43%

Note that more recent Averages and Extremes information for this location may be available. Please visit the Historical Climate Data's Almanac Averages and Extremes page.

Yesterday's Data

Max:
21.7°C
Min:
4.2°C

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