March weather forecast
Saint John, Canada

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Weather in March

March, the first month of the spring in Saint John, is an icy month, with an average temperature varying between 1.6°C (34.9°F) and -4.3°C (24.3°F).

Temperature

The start of March brings a subtle rise in the average high-temperature, moving from a subzero cold -1.5°C (29.3°F) in February to an icy 1.6°C (34.9°F). During March nights, Saint John witnesses a consistent average temperature of -4.3°C (24.3°F).

Humidity

In March, the average relative humidity is 82%.

Rainfall

In Saint John, Canada, during March, the rain falls for 8.9 days and regularly aggregates up to 26mm (1.02") of precipitation. In Saint John, during the entire year, the rain falls for 122.4 days and collects up to 390mm (15.35") of precipitation.

Snowfall

Months with snowfall in Saint John are January through May, November and December. In Saint John, in March, snow falls for 9.6 days, with typically accumulated 33mm (1.3") of snow. In Saint John, during the entire year, snow falls for 37.1 days and aggregates up to 188mm (7.4") of snow.

Sea temperature

The month with the coldest seawater in Saint John is March, with an average sea temperature of 2.9°C (37.2°F).
Note: In swimming engagements, this poses immediate life-threatening risks. The loss of breath control is instantaneous, thereby hindering clear thought. A specialized swimsuit is mandatory to limit thermal dissipation.

Daylight

In March, the average length of the day is 11h and 57min.
On the first day of the month, sunrise is at 7:00 am and sunset at 6:11 pm AST. On the last day of March, in Saint John, sunrise is at 7:04 am and sunset at 7:51 pm ADT.
Note: On Sunday, 10. March 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from AST to ADT. Daylight Saving Time lasts until Sunday, 03. November 2024, at 2:00 am; consequently, the time zone reverts from ADT to AST.

Sunshine

In March, the average sunshine is 4.8h.

UV index

The months with the lowest UV index in Saint John, Canada, are January through April, October through December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: A maximum high daily UV index of 2 during March translates into the following directions:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
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Frequently asked questions

How cold is it in Saint John in March?

The high-temperature, in March, in Saint John, is 1.6°C (34.9°F), while the low-temperature averages to -4.3°C (24.3°F).

What is the average humidity in March in Saint John?

In March, the average relative humidity in Saint John, Canada, is 82%.

How many days does it rain in March in Saint John?

In Saint John, Canada, in March, it is raining for 8.9 days, with typically 26mm (1.02") of accumulated precipitation.

How much does it snow in Saint John in March?

In March, in Saint John, it is snowing for 9.6 days. Throughout March, 33mm (1.3") of snow is accumulated.

What is the month with the coldest sea water in Saint John?

The month with the coldest seawater is March, with an average sea temperature of 2.9°C (37.2°F).

What is the water temperature in March in Saint John?

In Saint John, the average seawater temperature in March is 2.9°C (37.2°F). For swimming, this is considered life-threatening and very dangerous. The water feels painfully cold, and hyperventilation quickly occurs. A specialized swimsuit is mandatory to reduce thermal damage.

What is the average length of the day in March in Saint John?

In March, the average day length is 11h and 57min.

When is the sunrise / sunset in March in Saint John?

On the first day of March in Saint John, sunrise is at 7:00 am and sunset at 6:11 pm AST. On the last day of the month, sunrise is at 7:04 am and sunset at 7:51 pm ADT.

When does Daylight Saving Time (DST) start in March in Saint John?

On Sunday, 10. March 2024, at 2:00 am, Daylight Saving Time starts in Saint John, Canada, and the time zone changes from AST to ADT. DST ends on Sunday, 03. November 2024, at 2:00 am.

How long on average sun shines in March in Saint John?

In Saint John, Canada, the average sunshine duration in March is 4.8h.

When is the lowest UV index in Saint John?

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

How high is the UV index in March in Saint John?

In Saint John, the average daily maximum UV index in March is 2. A UV Index reading of 2, and below, represents a low health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in March
Saint John, Canada

Average temperature in March - Saint John, Canada
  • Average high temperature in March: 1.6°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 March: -4.3°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).

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Average pressure in March
Saint John, Canada

Average pressure in March - Saint John, Canada
  • Average pressure in March: 1015.3mbar

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

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Average wind speed in March
Saint John, Canada

Average wind speed in March - Saint John, Canada
  • Average wind speed in March: 19.2km/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).

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Average humidity in March
Saint John, Canada

Average humidity in March - Saint John, Canada
  • Average humidity in March: 82%

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

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Average rainfall in March
Saint John, Canada

Average rainfall in March - Saint John, Canada
  • Average rainfall in March: 26mm

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

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Average rainfall days in March
Saint John, Canada

Average rainfall days in March - Saint John, Canada
  • Average rainfall days in March: 8.9 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).

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Average snowfall in March
Saint John, Canada

Average snowfall in March - Saint John, Canada
  • Average snowfall in March: 33mm

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

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Average snowfall days in March
Saint John, Canada

Average snowfall days in March - Saint John, Canada
  • Average snowfall days in March: 9.6 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).

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Average sea temperature in March
Saint John, Canada

Average sea temperature in March - Saint John, Canada
  • Average sea temperature in March: 2.9°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).

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

Average daylight in March / Average sunshine in March - Saint John, Canada
  • Average daylight in March: 12h and 0min

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 March: 4h and 5min

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).

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Average sunshine days in March
Saint John, Canada

Average sunshine days in March - Saint John, Canada
  • Average sunshine days in March: 15.2 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).

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Average UV index in March
Saint John, Canada

Average UV index in March - Saint John, Canada
  • Average UV index in March: 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).

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Average cloud cover in March
Saint John, Canada

Average cloud cover in March - Saint John, Canada
  • Average cloud cover in March: 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).

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Average visibility in March
Saint John, Canada

Average visibility in March - Saint John, Canada
  • Average visibility in March: 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).

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Saint John, Canada

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