March Weather in Saint John, Canada

Last updated: April 22, 2025

In March, Saint John, Canada experiences a transition from winter to spring, marked by a maximum temperature of 11°C (52°F) and an average of -1°C (31°F). As the chill of winter lingers, temperatures can drop as low as -17°C (2°F). This month is characterized by significant precipitation, with an average of 88 mm (3.5 in) distributed over 10 days, contributing to a relatively high humidity of 82%. The shifting weather patterns create a dynamic atmosphere, making March a month of both chilly surprises and refreshing changes as the region moves closer to the warmth of spring.

March Temperature in Saint John

March in Saint John, Canada, marks a subtle transition as winter begins to release its grip. With temperatures gradually warming, the month sees a minimum of -17°C (2°F) and averages around -1°C (31°F), rising to a maximum of 11°C (52°F). These figures indicate a noticeable shift from the deep chill of January and February, when temperatures dipped to their lows at -22°C (-8°F) and -20°C (-4°F), respectively. As March progresses, the promise of spring becomes more palpable, encouraging outdoor activities amidst the melting snow and budding landscapes. This gradual warming trend sets the stage for the welcomed arrival of April, where temperatures continue to rise, inviting everyone to emerge from the winter hibernation.

March Weather in Saint John: Daily Temperature Highs, Lows, and Averages

The chart illustrates March temperature patterns in Saint John, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec252630404855616359514030
Data source: Temperature data for Saint John generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

March Precipitation in Saint John

March in Saint John, Canada, marks a transition as winter begins to fade and spring approaches. With an average precipitation of 88 mm (3.5 in) over 10 days, the month sees a slight decline compared to the heavier rains of January and February, which recorded 107 mm and 112 mm respectively. This shift hints at the gradual thawing of snow and a easing into the wetter months ahead, as April sees a jump to 129 mm. While March's rainfall is mild, it serves as a precursor to April's more significant precipitation, suggesting that the region prepares for lush growth as spring fully takes root. Interestingly, the precipitation pattern reveals a relatable ebb and flow, where the hustle of early-year rain paves the way for the vibrant awakening of the season.

March Precipitation Trends in Saint John

The chart displays monthly precipitation patterns in Saint John, with values for each month alongside March's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how March's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec107112881291171109289108123185142
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
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March Humidity in Saint John

In March, Saint John, Canada experiences a measured humidity of 82%, reflecting a slight dip from February’s 84%. This aligns with a general trend of decreasing humidity as winter transitions to spring, with April following closely at 80%. The fluctuations throughout the earlier months showcase a consistent humidity range between 80% and 84%, indicating that while March feels a touch drier, the sea-breezed city maintains a fairly humid atmosphere. As the seasons change, residents can expect a gradual levelling off, with humidity reaching its lowest point in the late spring, particularly in May at 78%. This ebb and flow of humidity highlight Saint John’s characteristic maritime climate, ensuring that, despite the slight nuances, the warmth of spring is accompanied by the familiar moisture of coastal living.

March Average Humidity in Saint John

This chart illustrates the average monthly humidity levels in Saint John, with March's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how March's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec83%84%82%80%78%82%84%82%82%82%84%82%
Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in Saint John

As March unfolds in Saint John, Canada, the UV Index climbs to a moderate 5, indicating a notable shift from the winter months. This increased UV exposure, with a burn time of just 30 minutes, highlights the need for sun safety as we transition into spring. Following February's 3, March presents a trend toward higher UV levels, foreshadowing even more intense rays in the coming months. This progression will soon peak in the summer, where values will soar to a staggering 10 in June. Residents and visitors alike should be mindful of these changes and take appropriate precautions as days grow longer and sunnier. For more details, visit Saint John UV Index.

Maximum UV Index Levels in Saint John for March

The chart shows the monthly maximum UV Index (UVI) for Saint John in March, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec2357910887532
Data source: Saint John March UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

March Sunshine in Saint John

As March unfolds in Saint John, Canada, the city basks in a remarkable 242 hours of sunshine, marking a noticeable increase from the 187 hours seen in February. This surge in daylight signals the transition into spring, as residents revel in the longer, brighter days that set the tone for the months ahead. Following March, April sees a slight dip to 228 hours, yet the upward trend continues into May, with a delightful 280 hours of sunlight, and peaks in the summer months, promising vibrancy and life. This rhythmic pattern of increasing daylight not only enhances the natural beauty of Saint John but also invigorates the community, fostering outdoor activities and a celebratory spirit as they welcome warmer days.

Monthly Sunshine Duration in Saint John: March Highlighted

The March sunshine duration represents the total number of hours Saint John experiences direct sunlight during the month of March, excluding cloudy or obstructed periods. This chart compares the sunshine duration of March with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec127h187h242h228h280h307h304h312h266h222h159h153h
Data source: Saint John March Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Saint John During March

As March arrives in Saint John, Canada, residents can look forward to a significant uptick in sunny weather, with the chance of sunshine soaring to 50%—a notable increase compared to the lower percentages observed in the preceding winter months. This rising trend marks a shift from the 29% in January and 28% in February, signaling the long-awaited transition towards spring. In fact, March stands out as the sunniest month since autumn, surpassing April's 28% and even May's 39%. This promising forecast not only enhances outdoor activities but also lifts spirits, making March a hopeful precursor to the sunnier days ahead.

Percentage of Sunny Days in March in Saint John

The chart illustrates the percentage of sunny days in Saint John throughout the year, with March highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Saint John experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec29%28%50%28%39%38%19%29%42%41%42%33%
Data source: Saint John March chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Saint John in March

In Saint John, Canada, the arrival of March signals a delightful transition toward longer days, with daylight stretching to 11 hours. This increase from the 10 hours of February not only brightens the atmosphere but also sets the stage for the upcoming spring. As the days grow progressively longer, peaking in the summer months with 15 hours of daylight in June and July, March represents a pivotal moment in the seasonal shift. The gradual elongation of daylight continues into April, showcasing the region's evolution from winter's grasp to the vibrant life of spring. With each passing month, the increasing sunlight invites outdoor activities and a revitalizing sense of warmth and energy.

Average Daylight Hours in Saint John for March

The chart illustrates the variation in daylight duration in Saint John throughout the year, with March highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 10m10h 24m11h 57m13h 32m14h 53m15h 34m15h 12m13h 59m12h 28m10h 53m9h 30m8h 46m
Data source: Saint John daylight hours, calculated by summing the hours between sunrise and sunset for each day.

March Winds in Saint John

As March arrives in Saint John, Canada, residents can expect a noticeable uptick in wind activity, with average wind speeds reaching 6.2 m/s (14 mph)—the highest point since December. This transition marks a shift from the calmer winds of winter, which average around 5.5 m/s (12 mph) in January and February, heralding the arrival of spring. Interestingly, the winds begin to taper off in the following months of April and May, dropping to 5.7 m/s (13 mph) and 4.8 m/s (11 mph) respectively. This fluctuation creates a dynamic climate, where March's brisk breezes invigorate the atmosphere, offering a refreshing prelude to the milder months ahead. The windy pattern seen in March not only signals a change in seasons but also sets the stage for the tranquil summers that lie ahead.

Average March Wind Speed in Saint John

The chart displays monthly wind speed patterns in Saint John, with values for each month shown alongside March's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how March's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec5.55.66.2 m/s5.74.84.94.14.04.64.45.66.1
Data source: Saint John March wind data, generated using information from the Copernicus Climate Change Service.

How March Weather in Saint John Compares to Other Months

The weather in Saint John changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of March's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Saint John and find detailed weather information for every month.

In comparing the weather between March and January, we see a notable shift in temperatures and precipitation patterns. March tends to be milder, with average temperatures ranging from a minimum of -17°C (2°F) to a maximum of 11°C (52°F), while January experiences colder extremes, with a minimum of -22°C (-8°F) and a maximum of 13°C (56°F). Precipitation is slightly lower in March at 88 mm (3.5 in) compared to January's 107 mm (4.2 in), although both months see precipitation on approximately 10 days. Humidity levels remain relatively stable, with March at 82% and January at 83%. For more details about January weather, you can check Saint John weather in January.

March experiences a slight warming trend compared to February, with average temperatures rising from -3°C (26°F) in February to -1°C (31°F) in March. While both months see temperatures dipping to below freezing—February recording a minimum of -20°C (-4°F) and March a minimum of -17°C (2°F)—March boasts a maximum temperature of 11°C (52°F), slightly above February's maximum of 10°C (50°F). Precipitation levels are a bit lower in March, with 88 mm (3.5 inches) over 10 days, compared to February’s 112 mm (4.4 inches) over 12 days. Humidity remains similar, with March at 82% and February at 84%. For a detailed look at February conditions, you can visit Saint John weather in February.

In March, the weather is characterized by colder temperatures, with a minimum of -17°C (2°F) and an average of -1°C (31°F), while April brings a noticeable warming trend, with temperatures ranging from a minimum of -5°C (23°F) to an average of 4°C (40°F). Precipitation also increases from March's 88 mm (3.5 in) over 10 days to April's 129 mm (5.1 in), occurring over 13 days. Despite the rise in precipitation, April's humidity is slightly lower at 80%, compared to March's 82%. Overall, April offers a transition to milder weather, making it a more pleasant month. For more details, check out Saint John weather in April.

March and May present stark contrasts in weather for the region. In March, temperatures can plunge as low as -17°C (2°F), with an average of -1°C (31°F) and a maximum of 11°C (52°F), making it a much colder month overall. Precipitation is notable at 88 mm (3.5 in) over about 10 days, coupled with a high humidity level of 82%. In contrast, May shows a warming trend, with minimum temperatures starting at 1°C (33°F) and rising to an average of 9°C (48°F) and a maximum of 20°C (68°F). The month is slightly wetter, with 117 mm (4.6 in) of precipitation spread over 12 days, and humidity drops to a more comfortable 78%. For those interested in more details about the conditions in May, you can find more information here: Saint John weather in May.

In March, the weather is quite chilly, with temperatures ranging from a frigid minimum of -17°C (2°F) to a maximum of 11°C (52°F), and an average temperature of -1°C (31°F). The month sees about 88 mm (3.5 in) of precipitation over 10 days, while humidity hovers at 82%. In contrast, June offers a significant warming trend, with temperatures starting at a minimum of 4°C (39°F) and reaching a comfortable maximum of 21°C (71°F), resulting in an average of 13°C (56°F). June also experiences a slightly higher precipitation level of 110 mm (4.3 in) over 11 days, maintaining the same humidity level of 82%. For more details on the June weather, check out Saint John weather in June.

In comparing the weather of March and July, we see a stark contrast in temperatures and conditions. March features a chilly range with minimum temperatures plummeting to -17°C (2°F), while the average temperature sits at a brisk -1°C (31°F) and peaks at 11°C (52°F). This month also experiences significant precipitation, totaling 88 mm (3.5 in) over about 10 days, coupled with high humidity of 82%.

In contrast, July brings milder and more pleasant weather, with temperatures ranging from a minimum of 11°C (51°F) to an average of 16°C (62°F) and a maximum of 22°C (72°F). Although July has slightly higher precipitation at 92 mm (3.6 in) distributed over 13 days, the humidity remains relatively stable at 84%. For more detailed insights, you can check Saint John weather in July.

March and August in Saint John present a striking contrast in weather conditions. March experiences much colder temperatures, with a minimum of -17°C (2°F) and an average of -1°C (31°F), compared to August's milder minimum of 11°C (53°F) and an average of 17°C (63°F). While both months receive similar levels of precipitation—88 mm (3.5 in) in March and 89 mm (3.5 in) in August—the temperature range in August allows for a more pleasant outdoor experience. Additionally, humidity remains constant at 82% for both months, emphasizing the consistent moisture in the atmosphere regardless of the temperature differences. For a deeper look at August weather specifics, you can refer to Saint John weather in August.

March and September in Saint John present a stark contrast in weather conditions. March features colder temperatures, with a minimum dipping to -17°C (2°F) and an average around -1°C (31°F), while September enjoys milder temperatures, with a minimum of 7°C (45°F) and an average of 15°C (59°F). Precipitation levels are similar, with March receiving 88 mm (3.5 in) and September slightly higher at 108 mm (4.3 in), both spread over approximately 10 days. Despite this, the humidity remains constant at 82% in both months, contributing to a damp feeling in the air. For more insights into the September climate, you can refer to Saint John weather in September.

In comparing the weather of March and October, significant differences in temperature and precipitation patterns emerge. March experiences colder conditions, with temperatures ranging from a chilling minimum of -17°C (2°F) to a maximum of 11°C (52°F), while October sees a more temperate range from 0°C (33°F) to 19°C (67°F). Precipitation is slightly higher in October, with 123 mm (4.8 in) measured over 12 days compared to March's 88 mm (3.5 in) across 10 days, but both months share a consistent humidity level of 82%. For those looking to understand October's weather in more detail, visit Saint John weather in October.

March and November present contrasting weather patterns in Saint John. In March, temperatures typically range from a chilly -17°C (2°F) at night to a mild high of 11°C (52°F) during the day, with an average temperature around -1°C (31°F). The month sees about 88 mm (3.5 in) of precipitation over approximately 10 days, coupled with an average humidity of 82%. In contrast, November offers milder conditions with a temperature range from a minimum of -12°C (10°F) to a maximum of 16°C (62°F), averaging 5°C (40°F). This month experiences significantly higher precipitation at 184 mm (7.3 in) over about 14 days, and humidity rises slightly to 84%. For more details, see Saint John weather in November.

In March, temperatures can range from a minimum of -17°C (2°F) to a maximum of 11°C (52°F), with an average hovering around -1°C (31°F). The month sees about 88 mm (3.5 in) of precipitation over roughly 10 days, while humidity remains steady at 82%. In contrast, December experiences slightly colder temperatures, with a minimum of -18°C (-1°F) and a maximum of 14°C (57°F), although the average also rests at -1°C (31°F). This month records more precipitation at 142 mm (5.6 in) over 12 days, maintaining the same humidity of 82%. For more detailed insights, you can explore Saint John weather in December.

Compare Saint John's Climate with Cities Worldwide

Conclusion: What to Expect From March Weather in Saint John

As winter slowly gives way to spring, March in Saint John brings a notable shift in weather patterns. While temperatures begin to rise, contrasting widely from the biting chill of January and February, the lingering cold can still surprise, with minimums dipping near freezing. Precipitation is frequent yet modest, maintaining that 82% humidity which adds a crispness to the air. Unlike the heavier snowfalls of winter, March often presents a mix of rain and occasional flurries, showcasing the transition of the seasons. This month is a reminder that while spring is on the horizon, winter still holds a stubborn grip. To explore more about how Saint John's climate evolves throughout the year, check out Saint John Climate.