Last updated: April 22, 2025
In May, St. John's, Canada emerges from the chill of winter, offering a refreshing spring climate characterized by a maximum temperature of 20°C (68°F) and an average of 5°C (41°F). Despite this warming trend, minimum temperatures can dip to -3°C (27°F), reminding residents of the lingering coolness. With an average precipitation amount of 80 mm (3.1 in) spread across 12 days, May is often marked by damp conditions, elevated by a significant humidity level of 90%. This month paints a picture of transitional weather, blending the vibrancy of spring with the remnants of winter's grasp.
In May, St. John's, Canada, begins to shed the last remnants of winter as temperatures rise markedly. With minimums around -3°C (27°F) and average highs reaching a pleasant 20°C (68°F), the city starts to buzz with life as the days beautifully transition into spring. Compared to the preceding months, where chilly temperatures lingered, May marks a significant warming trend, bringing a sense of renewal. The average temperature of 5°C (41°F) signals a fresh start, inviting both locals and visitors to enjoy the blossoming landscapes. As the chill of winter gives way to milder, sunnier days, this month sets the perfect stage for outdoor adventures and celebrations in the vibrant city.
In St. John's, Canada, May brings a notable shift in precipitation, with an average of 80 mm (3.1 in) over 12 rainy days. This marks a significant decrease from the wettest months earlier in the year, as January through April consistently recorded higher rainfall, ranging from 100 mm to 113 mm. The trend suggests a gradual easing of spring's wet embrace, leading into the summer months. After May, precipitation begins to slightly rise again in June to 86 mm (3.4 in), hinting at a pattern where wetter conditions oscillate throughout the year. As the landscape transitions from spring's showers to summer's milder rains, May serves as a pivotal point, balancing warmth and moisture for the burgeoning season ahead.
As the seasons shift in St. John's, Canada, May heralds a noticeable increase in humidity, reaching 90%—a significant jump from the 88% in April. This rising trend continues into the summer, with humidity peaking at 94% in July. The gradual escalation of moisture in the air signifies the approach of warmer months and an environment rich in vitality. Visitors can expect the air to feel increasingly dense as it transitions from the cooler, drier winter months, where humidity starts at 83% in January and only climbs throughout spring. May sets the stage for the summer's sultriness, laying the groundwork for a lush and vibrant setting.
As May rolls into St. John's, Canada, residents and visitors alike should be aware that the UV Index soars to an impressive 8, marking the beginning of a season where sun safety becomes paramount. With a “very high” exposure category, the risk of harm from unprotected sun exposure drastically increases, cutting burn time to a mere 15 minutes. This trend continues into June and July, where the UV Index peaks at 10 and 9 respectively, before tapering off in the fall. The gradual rise from 2 in January to 8 in May illustrates a clear shift towards more intense sun during the warmer months. As you plan your outdoor activities, remember to protect your skin and stay informed about the St. John's UV Index to ensure a safe and enjoyable experience under the sun.
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As the vibrant month of May unfolds in St. John's, Canada, residents eagerly welcome an impressive 280 hours of sunshine, marking a delightful peak in sunlight hours for the year. This significant increase from the previous months is a clear indication of spring's embrace, following a gradual rise from 208 hours in April. The trend continues as the city transitions into summer, with June and July offering similarly generous doses of sunlight, peaking at 306 hours in August. This pattern showcases a captivating shift from the limited daylight of winter months, where January recorded a mere 88 hours. The sunshine not only brightens the skies but also uplifts spirits, inviting outdoor adventures and community gatherings as the warmer days approach.
In St. John's, Canada, the likelihood of experiencing sunny weather in May shows a promising uptick, with a 32% chance of sunshine. This marks a notable improvement compared to the dismal winter months, where January and February boast only 17% and 18% chances, respectively. The month of March begins to hint at brighter days ahead, rising to 36%, while April remains relatively low at 19%. As spring fully unfolds in May, the likelihood of sunshine starts to resemble the early summer months, which hover around 33% in June and 25% in July. This trend indicates that as the seasons progress, residents and visitors of St. John's can look forward to an increasing opportunity to soak up some rays in May, making it a delightful time to enjoy the scenery.
As spring blossoms into summer, St. John's, Canada, experiences a remarkable shift in daylight duration. Starting in January with just 8 hours of sunlight, the days gradually lengthen to 10 hours in February and 11 hours in March as winter gives way to early spring. By April, the daylight extends to 13 hours, setting the stage for May's peak at an invigorating 15 hours. This generous daylight persists through June and July, allowing residents to savor the warm evenings. As late summer transitions into early autumn, daylight begins to wane, dropping to 14 hours in August and further to 12 hours in September. Ultimately, by October, daylight decreases to 10 hours, heralding the approach of winter once again, with the cycle repeating as the year closes with 9 hours in November and returning to 8 hours in December. This cyclical dance of daylight in St. John's paints a vivid picture of the changing seasons.
In May, the winds in St. John's, Canada, exhibit a gentle decline, with an average speed of 5.4 m/s (12 mph). This marks a slight decrease from April's 5.6 m/s, suggesting a transition to the calmness of summer. Interestingly, while the wind speeds peak in the earlier months, notably reaching 7.2 m/s in December, there appears to be a consistent trend of diminishing wind through spring and the onset of summer. By June, the average dips further to 5.0 m/s, reflecting a seasonal shift that locals may appreciate as they enjoy outdoor activities. Overall, May serves as a pivotal month, bridging the brisk spring breezes with the softer winds of the approaching summer.
The weather in St. John's changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of May's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in St. John's and find detailed weather information for every month.
When comparing the weather in May and January, there are notable differences in both temperature and precipitation. In May, temperatures range from a minimum of -3°C (27°F) to a pleasant maximum of 20°C (68°F), with an average of 5°C (41°F). This month sees about 80 mm (3.1 in) of precipitation over 12 days and a high humidity level of 90%. In contrast, January is much colder, with temperatures dipping as low as -14°C (7°F) and averaging -2°C (29°F), peaking at 12°C (54°F). It experiences slightly higher precipitation at 113 mm (4.5 in) over 13 days, along with a humidity of 83%. For more detailed information about January's weather, you can visit St. John's weather in January.
When comparing the weather in May and February, it's clear that May brings a significant warming trend. In May, temperatures can range from a chilly -3°C (27°F) to a pleasant max of 20°C (68°F), with an average of 5°C (41°F). In contrast, February is much colder, with temperatures ranging from -16°C (3°F) to a maximum of only 10°C (50°F) and an average of -3°C (26°F). While both months see similar precipitation days—12 in each—February has slightly higher precipitation at 102 mm (4.0 in) compared to May's 80 mm (3.1 in). Additionally, May experiences a higher humidity level of 90%, compared to February's 84%. For a more detailed look at February, visit St. John's weather in February.
In comparing the weather between March and May, it's evident that May brings a significant warming trend. While March experiences a chilly average temperature of -2°C (29°F) with minimum lows of -14°C (8°F), May sees temperatures rise to an average of 5°C (41°F), peaking at a pleasant 20°C (68°F). Despite May's warmer conditions, it does bring along 80 mm (3.1 in) of precipitation over 12 days, compared to March's slightly higher 100 mm (3.9 in) across 13 days. Humidity levels also differ slightly, with May at a humid 90% and March at 85%. For more detailed insights, you can explore St. John's weather in March.
In comparing the weather between April and May, we notice a transition towards milder temperatures. May typically has a minimum temperature of -3°C (27°F) compared to April's cooler minimum of -6°C (22°F), and its maximum reaches a more comfortable 20°C (68°F) versus April's 15°C (60°F). The average temperature in May also rises to 5°C (41°F), which is an improvement over April's 2°C (36°F). However, April experiences slightly more precipitation at 103 mm (4.0 in) over 14 days, compared to May's 80 mm (3.1 in) on 12 days. Despite the increased rainfall in April, May's humidity level is higher at 90%, reflecting the change in season. For a closer look, you can check St. John's weather in April.
May and June exhibit a noticeable shift in weather patterns. In May, temperatures range from a minimum of -3°C (27°F) to a maximum of 20°C (68°F), with an average of 5°C (41°F). The month sees about 80 mm (3.1 in) of precipitation over 12 days, accompanied by a high humidity level of 90%. By contrast, June temperatures rise, with a minimum of 0°C (33°F), an average of 10°C (51°F), and a maximum of 24°C (75°F). While precipitation slightly increases to 86 mm (3.4 in) over the same 12 days, humidity remains comparable at 91%. For a closer look at June weather specifics, check out St. John's weather in June.
In May, the weather in St. John's is characterized by cooler temperatures, with a minimum of -3°C (27°F) and an average of 5°C (41°F), while July sees a significant increase, with minimum temperatures rising to 6°C (43°F) and an average of 15°C (58°F). July also experiences higher maximum temperatures, reaching up to 25°C (76°F), compared to May’s max of 20°C (68°F). While both months receive considerable rainfall, May has 80 mm (3.1 in) over 12 days, whereas July sees slightly more precipitation at 100 mm (3.9 in) across 10 days. Additionally, humidity levels are notably high in both months, with May at 90% and July at 94%. For more detailed insights on July weather, visit St. John's weather in July.
In comparing the weather between May and August, we notice distinct differences. May tends to be cooler, with temperatures ranging from a minimum of -3°C (27°F) to a maximum of 20°C (68°F) and an average of 5°C (41°F). It also experiences higher precipitation, averaging 80 mm (3.1 in) over about 12 rainy days, coupled with a humidity level of 90%. In contrast, August offers warmer temperatures, with a minimum of 8°C (46°F), an average of 17°C (62°F), and a maximum of 27°C (80°F). The month is slightly drier, with 69 mm (2.7 in) of precipitation spread over around 10 days and a higher humidity of 93%. For a detailed look at what to expect, you can check out St. John's weather in August.
May and September in St. John's showcase distinct differences in weather patterns. In May, temperatures range from a brisk -3°C (27°F) to a mild 20°C (68°F), with an average of 5°C (41°F). The month experiences about 80 mm (3.1 in) of precipitation over approximately 12 days, while the humidity remains high at 90%. In contrast, September offers a warmer climate, with temperatures ranging from a minimum of 4°C (39°F) to a pleasant maximum of 24°C (75°F), averaging around 13°C (56°F). The amount of rainfall also increases slightly, reaching 107 mm (4.2 in) over 11 days. Despite the uptick in precipitation, the humidity remains consistently high at 90%. For more details, check out St. John's weather in September.
In May, temperatures range from a chilly minimum of -3°C (27°F) to a pleasant maximum of 20°C (68°F), with an average of 5°C (41°F). The month sees around 80 mm (3.1 in) of precipitation over 12 days, accompanied by high humidity at 90%. In contrast, October experiences slightly milder conditions, with temperatures starting at 0°C (32°F) and reaching a maximum of 22°C (72°F), averaging 8°C (48°F). October also has a bit more precipitation, totaling 97 mm (3.8 in) over the same number of days, but with a lower humidity level of 87%. For more details on October weather, you can check St. John's weather in October.
May and November in St. John's exhibit distinct weather patterns, reflecting the transition between spring and late autumn. In May, temperatures range from a minimum of -3°C (27°F) to a maximum of 20°C (68°F), with an average of 5°C (41°F), while November sees slightly cooler temperatures with a minimum of -6°C (22°F), an average of 4°C (40°F), and a maximum of 16°C (62°F). Precipitation is more significant in November, totaling 108 mm (4.3 in) over 13 days, compared to May's 80 mm (3.1 in) over 12 days. Humidity levels are high in both months, but May experiences slightly higher humidity at 90%, while November's humidity stands at 84%. For more details, check out St. John's weather in November.
May and December in St. John's present two distinct weather experiences. May sees a wider temperature range, with minimums around -3°C (27°F) and maximums reaching up to 20°C (68°F), while averaging 5°C (41°F). In contrast, December is colder, with averages hovering around 0°C (33°F) and maximums capping at 15°C (59°F), alongside lower humidity at 83% compared to May's 90%. Additionally, December experiences more precipitation, with 133 mm (5.3 in) over 16 days, compared to May’s 80 mm (3.1 in) over 12 days. For more details on December weather, you can visit St. John's weather in December.
As May unfolds in St. John's, the weather begins to transition from the lingering chill of winter to the promise of warmer days. With average temperatures hovering around 5°C, the city experiences its first real signs of spring, distinguished by a notable increase in humidity at 90%. While the 80 mm of precipitation over approximately 12 days ensures the lushness of the landscape, these wetter conditions are a sharp contrast to the drier and cooler months preceding it. Thus, May serves as a pivotal month, bridging St. John's still-cool springtime with the summer warmth to come. For a deeper dive into the overarching trends of St. John's weather, explore St. John's Climate.