January weather forecastSaint John, Canada

January

Weather in January

Kicking off the year, January presents some of Saint John, Canada's coldest weather conditions. A dominating feature of this month is the high probability of snow, creating a winter wonderland ambiance across the city. Given freezing temperatures reaching their peak, it is a good idea to bundle up before venturing outdoors. Winds also contribute to the chilly air, adding a significant wind-chill factor to the equation. Notably, January’s lowest temperature can dip down to -8.6°C (16.5°F) with snowfall accumulating from 38mm (1.5") to 40mm (1.57") combining with the strong gust of wind peaking at 29.4km/h (18.3mph).

Temperature

Saint John notes the coldest temperatures in January, with a high average of -1.9°C (28.6°F) and a low of -8.6°C (16.5°F).

Humidity

January and February, with an average relative humidity of 85%, are the most humid months.

Rainfall

In Saint John, during January, the rain falls for 5.6 days and regularly aggregates up to 39mm (1.54") of precipitation. Throughout the year, there are 122.4 rainfall days, and 390mm (15.35") of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, November and December. January is the month with the most snowfall in Saint John. Snow falls for 7.6 days and accumulates 40mm (1.57") of snow.

Sea temperature

In January, the average sea temperature is 4.8°C (40.6°F).
Note: Under swimming conditions, this represents an immediate threat to life. Control over breathing is lost instantaneously, complicating thought processes. A specialized swimsuit is indispensable to conserve thermal energy.

Daylight

In January, the average length of the day is 9h and 13min.
On the first day of January, sunrise is at 8:03 am and sunset at 4:51 pm. On the last day of the month, sunrise is at 7:46 am and sunset at 5:29 pm AST.

Sunshine

The average sunshine in January in Saint John is 3.8h.

UV index

January through April, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Saint John. A UV Index estimate of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum daily UV index of 2 during January translates into the following directions:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. To guard against the harmful effects of the Sun, minimize exposure during midday. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.

Updated: Feb 5, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

January, noted for its average high-temperature of -1.9°C (28.6°F) and an average low-temperature of -8.6°C (16.5°F), is considered the coldest month.

Saint John in January has an average high-temperature of -1.9°C (28.6°F) and an average low-temperature of -8.6°C (16.5°F).

January and February, with an average relative humidity of 85%, are most humid months in Saint John.

In Saint John, Canada, the average relative humidity in January is 85%.

In Saint John, during January, the rain falls for 5.6 days and regularly aggregates up to 39mm (1.54") of precipitation.

January is the month with the most snowfall. Snow falls for 7.6 days and accumulates 40mm (1.57") of snow.

In Saint John, during January, snow falls for 7.6 days and regularly aggregates up to 40mm (1.57") of snow.

In Saint John, in January, the average water temperature is 4.8°C (40.6°F). For swimming, this is considered very dangerous and immediately life-threatening. Total loss of breathing control instantly occurs, and clear thinking becomes almost impossible. A specialized swimsuit is obligatory to minimize thermal loss.

In Saint John, Canada, the average day length in January is 9h and 13min.

On the first day of January, sunrise is at 8:03 am and sunset at 4:51 pm. On the last day of the month, sunrise is at 7:46 am and sunset at 5:29 pm AST.

The average sunshine duration in January in Saint John is 3.8h.

January through April, October through December, with an average maximum UV index of 2, are months with the lowest UV index.

The average daily maximum UV index in January in Saint John is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year January F M A M J J A S O N D

Dec

January

Feb

Average high temperature

1.3°C

-1.9°C

-1.5°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

20.6km/h

21km/h

20.7km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

5.6

7.6

8.2

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

16.9

18.9

Average UV index

Average cloud cover

Average visibility

Average temperature in January
Saint John, Canada

Average high temperature in January: -1.9°C

The warmest month (with the highest average high temperature) is August (21.5°C).
The month with the lowest average high temperature is January (-1.9°C).

Average low temperature in January: -8.6°C

The month with the highest average low temperature is August (14.3°C).
The coldest month (with the lowest average low temperature) is January (-8.6°C).

Average pressure in January
Saint John, Canada

Average pressure in January: 1013.3mbar

The month with the highest atmospheric pressure is September (1017mbar).
The month with the lowest atmospheric pressure is June (1012.8mbar).

Average wind speed in January
Saint John, Canada

Average wind speed in January: 19.9km/h

The windiest month (with the highest average wind speed) is January (19.9km/h).
The calmest month (with the lowest average wind speed) is August (12.3km/h).

Average humidity in January
Saint John, Canada

Average humidity in January: 85%

The months with the highest relative humidity are January and February (85%).
The months with the lowest relative humidity are October and November (80%).

Average rainfall in January
Saint John, Canada

Average rainfall in January: 39mm

The wettest month (with the highest rainfall) is December (43mm).
The driest month (with the least rainfall) is August (22mm).

Average rainfall days in January
Saint John, Canada

Average rainfall days in January: 5.6 days

The month with the highest number of rainy days is May (14.2 days).
The month with the least rainy days is February (5.4 days).

Average snowfall in January
Saint John, Canada

Average snowfall in January: 40mm

The month with the highest snowfall is January (40mm).
The months with the least snowfall are June, July, August, September and October (0mm).

Average snowfall days in January
Saint John, Canada

Average snowfall days in January: 7.6 days

The month with the highest number of snowfall days is March (9.6 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

Average sea temperature in January
Saint John, Canada

Average sea temperature in January: 4.8°C

The best month for swimming (with the highest average sea temperature) is August (13.3°C).
The coldest month (with the lowest average sea temperature) is March (2.9°C).

Average daylight in January /
Average sunshine in January
Saint John, Canada

Average daylight in January: 9h and 12min

The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).

Average sunshine in January: 3h and 48min

The month with the most sunshine is August (Average sunshine: 9h and 30min).
The month with the least sunshine is February (Average sunshine: 3h and 42min).

Average sunshine days in January
Saint John, Canada

Average sunshine days in January: 18.9 days

The month with the most sunshine days is January (18.9 days).
The month with the least sunshine days is April (11.8 days).

Average UV index in January
Saint John, Canada

Average UV index in January: 2

The months with the highest UV index are July and August (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).

Average cloud cover in January
Saint John, Canada

Average cloud cover in January: 60

The month with the most cloud cover is February (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 36).

Average visibility in January
Saint John, Canada

Average visibility in January: 9km

The month with the highest visibility is October (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, November and December (9km).