Last updated: April 22, 2025
January in Saint John, Canada presents a chilly yet captivating winter atmosphere. With maximum temperatures reaching 13°C (56°F) and an average sitting at a brisk -4°C (26°F), residents experience a true taste of the season. The minimum temperature can drop to a frosty -22°C (-8°F), calling for warm layers and cozy indoor activities. This month sees 107 mm (4.2 in) of precipitation spread over 10 days, contributing to an overall humidity level of 83%, creating a crisp and damp ambiance. Whether braving the cold outdoors or savoring the warmth indoors, January offers a unique blend of winter weather in Saint John.
In January, Saint John, Canada, experiences a chilling blend of winter temperatures, with minimums dipping to a frigid -22°C (-8°F) and averaging around -4°C (26°F). Despite the cold, temperature highs can surprisingly reach up to 13°C (56°F), showcasing the area's variability during winter. This month marks one of the coldest periods of the year, characteristic of the region’s harsh climate. As January transitions to February, temperatures remain similarly brisk, with average temperatures hovering near -3°C (26°F). Overall, the patterns illustrate a true northern winter experience, combining stark cold with fleeting warmth, enticing visitors to bundle up and explore the beauty of this maritime city.
January in Saint John, Canada, brings a modest precipitation total of 107 mm (4.2 in), falling over approximately 10 days. This sets the stage for a wet winter, though it is slightly less than the following month, February, which sees an increase to 112 mm (4.4 in). As winter deepens, the precipitation trend continues its upward trajectory, peaking in November with a significant 184 mm (7.3 in) over 14 days. Notably, January's precipitation is part of a larger pattern where the months that follow also show an increase, suggesting a shift from the drier conditions early in the year to the wetter, more saturated months of late fall. Overall, January's weather offers a glimpse into the diverse precipitation landscape of Saint John, where winter's chill often coexists with steady, if not abundant, rainfall.
In January, Saint John experiences humidity levels at 83%, marking the start of the year with a noticeable dampness. This trend of high humidity persists throughout the winter months, peaking at 84% in February and November. As spring approaches, humidity slightly decreases, with April and May showing a more moderate 80% and 78%, respectively. The summer months see a return to more humid conditions, particularly in July and August, when levels stabilize around 84% and 82%. Interestingly, this pattern is mirrored in fall, maintaining an average of 82% from September through October. Overall, Saint John's humidity remains consistently high, creating a moist atmosphere that characterizes its climate throughout the year.
In January, the UV Index in Saint John, Canada sits at a moderate 2, indicating a low exposure category with a burn time of 45 minutes. The trend begins to shift as February approaches, rising to 3 with a moderate exposure level, decreasing the burn time to 30 minutes. By March, the index escalates to 5, maintaining the moderate category but hinting at the stronger sunlight ahead. As spring unfolds, April sees a leap to 7—classified as high—requiring more caution with only 25 minutes before sunburn occurs. The UV Index peaks in May and June, soaring to 9 and 10, respectively, both under the very high exposure category where protective measures become essential with burn times shrinking to just 15 minutes. The summer months of July and August follow suit, sustaining a high index, though we observe a slight drop back to 7 in September, signaling a transition into fall. As the year winds down, the index returns to 3 in November and drops back to 2 by December, marking a seasonal decrease as the burn times extend back to 45 minutes. This cyclical pattern highlights the importance of staying informed about UV exposure throughout the year. For more detailed information, visit Saint John UV Index.
UV Risk Categories
In Saint John, Canada, January brings 127 hours of sunshine, making it one of the sunniest months of the year, albeit significantly lower than the sun-drenched summer days. As winter fades, February sees a promising increase to 187 hours, hinting at the return of brighter days. The real transformation occurs in March, where the sunshine hours leap to 242 and set the stage for spring's arrival. From this point on, sunshine remains abundant, peaking in the glorious summer months of July and August with a remarkable 304 and 312 hours, respectively. As autumn descends, sunshine gently declines but still holds steady with appealing hours in September and October before giving way to the shorter, darker days of November and December. Overall, the progression from the chilly start of the year to the vibrant summer showcases Saint John's charming shift from winter's grip to the warmth of sunny days.
In Saint John, Canada, January experiences a relatively low chance of sunny weather at 29%, reflecting the cold grip of winter. This percentage is closely matched by February's 28%, indicating a persistently gray season before the sun starts making more frequent appearances in March, when the likelihood jumps to 50%. As the calendar turns towards spring, the chances of sunlight fluctuate, with April and May showing similar probabilities of 28% and 39%, respectively. Notably, the summer months take a dip with July's chances plummeting to just 19% before gradually rising again in late summer and autumn. Overall, the trend suggests that while January is not particularly sunny, the transition towards spring brings a welcome increase in sunshine as the year progresses.
In January, Saint John, Canada, experiences about 9 hours of daylight, marking a gradual transition from the long winter nights. As February unfolds, daylight increases to 10 hours, hinting at the approaching spring. March brings further brightness with 11 hours, setting the stage for the significant jump in April, where daylight reaches 13 hours. This trend continues into May, offering 14 hours of sunshine, while June and July maintain a peak of 15 hours. However, as summer wanes, daylight begins to decline, with August dipping to 13 hours, followed by a gradual decrease through September and October, both at 10 hours. By November, daylight returns to 9 hours, and in December, it hits its lowest at just 8 hours, completing a yearly cycle of light that beautifully reflects the changing seasons in this vibrant coastal city.
In January, Saint John experiences a brisk average wind speed of 5.5 m/s (12 mph), setting the tone for the winter months with its invigorating chill. As the season progresses into February, the winds barely shift, remaining steady at 5.6 m/s. However, in the transition to March, a noticeable increase occurs, with winds strengthening to 6.2 m/s (14 mph), indicating a surge in gusty conditions as winter reluctantly gives way to spring. The winds then moderate slightly in April at 5.7 m/s before a gentle decline over the spring and summer months, with May and June dropping to 4.8 m/s and 4.9 m/s, respectively. By the time summer arrives, winds become softer, reaching their annual low in July and August at 4.1 m/s and 4.0 m/s. As autumn approaches, wind speeds gradually climb back up, peaking again in late fall with November at 5.6 m/s and December continuing the trend at 6.1 m/s (14 mph). This seasonal ebb and flow of wind in Saint John paints a vivid picture of the changing climates, offering both the thrill of winter’s bite and the calm of summer's embrace.
The weather in Saint John changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of January'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.
January and February exhibit similar cold temperatures, with January recording a minimum of -22°C (-8°F) and an average of -4°C (26°F), while February sees slightly milder conditions with a minimum of -20°C (-4°F) and an average of -3°C (26°F). Both months can experience significant precipitation, with January receiving 107 mm (4.2 in) over 10 days and February slightly surpassing that with 112 mm (4.4 in) over 12 days. Humidity levels remain quite high in both months, at 83% in January and 84% in February. For a detailed look at what to expect during February specifically, you can check out Saint John weather in February.
In January, the weather is quite frigid, with average temperatures hovering around -4°C (26°F) and minimums plunging to -22°C (-8°F), while March brings a slight reprieve with average temperatures rising to -1°C (31°F) and minimums at -17°C (2°F). Both months experience similar levels of precipitation, around 107 mm (4.2 in) in January compared to 88 mm (3.5 in) in March, occurring on about 10 days each month. Additionally, humidity remains fairly constant, with January at 83% and March at 82%. For more specific insights on the weather in March, check out Saint John weather in March.
In January, the weather is notably colder, with temperatures ranging from a minimum of -22°C (-8°F) to an average of -4°C (26°F) and a maximum of 13°C (56°F). The month experiences significant precipitation, totaling 107 mm (4.2 in) over about 10 days, and maintains a high humidity level of 83%. In contrast, April sees a milder climate, featuring a minimum temperature of -5°C (23°F) and an average of 4°C (40°F), with similar maximum temperatures reaching 13°C (55°F). Though April is wetter with 129 mm (5.1 in) of precipitation over 13 days, the humidity slightly decreases to 80%. For more detailed insights, you can visit Saint John weather in April.
January and May present starkly contrasting weather conditions. In January, temperatures can plummet to a chilling minimum of -22°C (-8°F), with an average temperature of -4°C (26°F) and a maximum of just 13°C (56°F). The month experiences significant precipitation, totaling 107 mm (4.2 in) over about 10 days, accompanied by high humidity levels of 83%. In contrast, May ushers in a breath of spring, with minimum temperatures rising to a milder 1°C (33°F) and an average of 9°C (48°F), reaching a maximum of 20°C (68°F). Although precipitation slightly increases to 117 mm (4.6 in) over 12 days, humidity decreases to 78%. For more details on spring conditions, check out Saint John weather in May.
In January, the weather is characterized by frigid temperatures, with a minimum reaching -22°C (-8°F) and an average of -4°C (26°F), making it the coldest month of the year. The precipitation in January is substantial, totaling 107 mm (4.2 in) over about 10 days, coupled with high humidity at 83%. In stark contrast, June brings a much milder climate, with temperatures ranging from a minimum of 4°C (39°F) to a maximum of 21°C (71°F) and an average of 13°C (56°F). While precipitation slightly increases to 110 mm (4.3 in) spread across 11 days, humidity remains comparable at 82%. For more details on June weather, you can check Saint John weather in June.
January and July present stark contrasts in weather conditions. January experiences frigid temperatures, with average lows dipping to -22°C (-8°F) and highs reaching only 13°C (56°F), accompanied by significant precipitation of 107 mm (4.2 in) over about 10 days and high humidity at 83%. In contrast, July offers a much milder climate, featuring average temperatures ranging from 11°C (51°F) at night to 22°C (72°F) during the day. The precipitation is slightly lower at 92 mm (3.6 in) spread over 13 days, and humidity remains high at 84%. For more details on the summer climate, visit Saint John weather in July.
January and August in Saint John present strikingly different weather conditions. In January, temperatures can plummet to a minimum of -22°C (-8°F), with an average temperature of -4°C (26°F) and a maximum reaching 13°C (56°F). The month is marked by significant precipitation of 107 mm (4.2 in) over about 10 days, accompanied by high humidity at 83%. In contrast, August offers a more temperate climate, with minimum temperatures around 11°C (53°F), an average of 17°C (63°F), and a maximum of 23°C (74°F). Precipitation in August is slightly lower at 89 mm (3.5 in) over the same number of days, with humidity slightly reduced to 82%. For more details on the weather during this month, you can visit Saint John weather in August.
In January, the weather is significantly colder, with temperatures ranging from a frigid -22°C (-8°F) to a maximum of 13°C (56°F), characterized by an average temperature of -4°C (26°F). This stark chill is accompanied by considerable precipitation, totaling 107 mm (4.2 in) over about 10 days, and a high humidity level of 83%. In contrast, September brings much milder conditions, with temperatures varying from a minimum of 7°C (45°F) to a pleasant maximum of 22°C (73°F), leading to an average of 15°C (59°F). While precipitation remains similar at 108 mm (4.3 in) over the same number of days, humidity dips slightly to 82%. The transition from the harsh, wintry January to the gentle warmth of September is a remarkable shift in the climate. For those interested in specifics, you can find more about Saint John weather in September.
In January, the weather is much colder, with temperatures ranging from a frigid -22°C (-8°F) at minimum to a maximum of 13°C (56°F), and an average of -4°C (26°F). The month sees significant precipitation of 107 mm (4.2 in) over approximately 10 days and a relative humidity of 83%. In contrast, October experiences milder temperatures, with a minimum of 0°C (33°F) and a comfortable average of 11°C (52°F), peaking at 19°C (67°F). Though October has slightly higher precipitation at 123 mm (4.8 in) over about 12 days, the humidity remains comparable at 82%. For a closer look at what to expect, check out Saint John weather in October.
In January, the weather is significantly colder, with average temperatures hovering around -4°C (26°F) and a chilling minimum of -22°C (-8°F). In comparison, November enjoys milder conditions, where temperatures range from a minimum of -12°C (10°F) to an average of 5°C (40°F). While January experiences less precipitation, totaling 107 mm (4.2 in) over approximately 10 days, November sees a notable increase in rainfall at 184 mm (7.3 in) over 14 days. Additionally, humidity levels remain quite high in both months, with January at 83% and November slightly higher at 84%. For more specifics on November weather, visit Saint John weather in November.
In January, temperatures in Saint John typically range from a chilly minimum of -22°C (-8°F) to a maximum of 13°C (56°F), with an average temperature of -4°C (26°F). While January experiences precipitation on about 10 days, totaling 107 mm (4.2 in), the humidity remains high at 83%. In comparison, December boasts slightly milder temperatures, with a minimum of -18°C (-1°F) and an average of -1°C (31°F), reaching a maximum of 14°C (57°F). December also sees more precipitation, averaging 142 mm (5.6 in) over 12 days, with humidity at 82%. For more detailed information, check out Saint John weather in December.
January in Saint John brings a distinct chill that sets it apart from other months of the year. As winter fully takes hold, temperatures can plunge to their lowest, with crisp days characterized by a significant drop from the mild fall months. While the precipitation levels remain relatively consistent, the icy chill and higher humidity levels can make the air feel even colder, leading to frequent snow and sleet. This month, with its occasional flurries and biting winds, showcases a winter landscape that starkly contrasts the warmer, more temperate conditions of spring and summer. For those curious about the broader climatic patterns, check out Saint John Climate to explore how January's weather fits into the region's overall climate.