Last updated: April 22, 2025
April in Ottawa, Canada brings a dramatic swing in weather, as temperatures range from a brisk -12°C (10°F) to a pleasantly warm 27°C (81°F). The month averages around 5°C (42°F), indicating a gradual transition into spring. However, residents should be prepared for 112 mm (4.4 in) of precipitation spread over 12 days, with a notable humidity level of 82%. As nature awakens from winter's chill, this blend of warmth and moisture creates an invigorating atmosphere, perfect for experiencing the vibrant reemergence of outdoor life in the capital.
In April, Ottawa begins to shake off the chill of winter, revealing a more temperate climate as the month progresses. With minimum temperatures averaging around -12°C (10°F), residents can expect a brisk start, but as days lengthen and the sun shines brighter, daytime highs can reach a pleasant 27°C (81°F). The shift to an average of 5°C (42°F) marks a significant transition, offering a taste of spring and encouraging outdoor activities. This remarkable temperature swing, from frosty mornings to mild afternoons, showcases Ottawa’s characteristic volatility, as it moves from the depths of winter into the rejuvenating warmth of spring.
April marks a significant uptick in precipitation in Ottawa, as the city receives 112 mm (4.4 in) of rain over 12 days, making it one of the wetter months of the year. This increase represents a noticeable shift from the preceding months, where precipitation amounts gradually rise from 76 mm (3.0 in) in January to 87 mm (3.4 in) in March. As spring fully unfolds, April's rainfall not only surpasses that of March but also paves the way for even wetter conditions in May, which records 117 mm (4.6 in). The transition from the drier winter months towards the more humid spring season is evident, allowing for the rejuvenation of nature and a vibrant landscape in the heart of Canada's capital.
In April, Ottawa experiences a noticeable decline in humidity, averaging around 82%. This marks a shift from the nearly constant 93% observed in the deep winter months of January and February, reflecting the gradual transition into spring. As temperatures rise, the city begins to shake off the chill of winter, which is mirrored in the steadily decreasing humidity levels—dropping from 86% in March to 82% in April. The month acts as a gateway to drier conditions, setting the stage for May, when humidity further decreases to 75%. This trend not only enhances the freshness of spring but also highlights Ottawa's climatic shift towards sunnier and more temperate days ahead.
April marks a significant shift in the UV Index for Ottawa, Canada, soaring to 8 and categorized as very high. This sharp increase from the previous month's moderate levels (UV Index 5) indicates that sunburn risks intensify, with a notably reduced burn time of just 15 minutes. As temperatures rise and sunny days become more frequent, it's essential for residents and visitors alike to take precautionary measures against UV exposure. The trend from winter’s mild levels to this brisk leap in April highlights the importance of being sun-smart during this transitioning season. For more insights on UV exposure throughout the year, check out the detailed information on the Ottawa UV Index.
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April in Ottawa shines with 227 hours of sunlight, showcasing a delightful continuation of the spring awakening that began in March, which recorded 235 hours. As the days lengthen and the chill of winter recedes, outdoor enthusiasts embrace the warmth and rejuvenation of the season. With May promising even more brightness at 279 hours, the city transitions into a vibrant tapestry of blooming flowers and bustling activities. This upward trend in sunshine hours sets the stage for an exciting summer, where July peaks at 348 hours, enveloping the capital in a sun-kissed glow, invigorating the local community and highlighting the beauty of nature in full bloom.
In April, Ottawa experiences a 36% chance of sunny weather, a figure that reflects a slight dip from the more optimistic conditions of March, which boasts a 44% likelihood of sunshine. As the city shakes off the chill of winter, residents and visitors alike begin to welcome the promise of longer days and warmer temperatures. Interestingly, the sunny disposition of April mirrors that of July, suggesting an intriguing fluctuation in odds throughout the spring and summer months. While May and August peak at 44% sunshine, the backdrop of April's weather remains a pivotal transitional period where the lingering clouds of winter slowly give way to the freshness of spring. This dynamic pattern sets an exciting stage for outdoor activities as Ottawa prepares to embrace the brighter days ahead.
As spring unfolds in Ottawa, April heralds a delightful increase in daylight, with the sun gracing the sky for 13 hours each day. This growth in daylight hours marks a significant leap from the 11 hours of March, signaling the transition from the chill of winter to a more vibrant and lively atmosphere. The trend continues as May approaches, promising 14 hours of daylight—an invitation to enjoy outdoor activities and relish the blooming surroundings. April’s expanding daylight not only brightens the days but also uplifts spirits, making it a perfect time for Ottawans to embrace the burgeoning energy of the season.
In Ottawa, April brings a gentle breeze with an average wind speed of 3.2 m/s (7 mph), slightly lower than the brisk winds of March, which gusted up to 3.8 m/s (9 mph). As winter yields to spring, there's a noticeable transition in wind patterns; the increased warmth of April appears to soften the harshness of the cold months, yet still maintains a pleasant freshness that invigorates the city’s outdoor life. While May and June see similar wind conditions at around 2.9 m/s (7 mph) and 3.1 m/s (7 mph), April stands out for striking that balance between briskness and comfort. This springtime gust serves as a gentle reminder that nature is awakening, setting the stage for milder days to come.
The weather in Ottawa changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of April's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Ottawa and find detailed weather information for every month.
April and January present a stark contrast in weather conditions. In April, temperatures range from a minimum of -12°C (10°F) to a maximum of 27°C (81°F), with an average of 5°C (42°F), making it a much milder month. Additionally, April experiences more precipitation at 112 mm (4.4 in) over 12 days, with humidity around 82%. In comparison, January is characterized by much colder temperatures, with a minimum of -32°C (-26°F), an average of -9°C (16°F), and a maximum of 10°C (50°F). The month sees less precipitation, totaling 76 mm (3.0 in) over 9 days, but it has a higher humidity level of 93%. For more details on January's climate, you can check Ottawa weather in January.
April weather in Ottawa showcases a significant shift in temperatures compared to February. With minimum temperatures reaching -12°C (10°F) and an average of 5°C (42°F), April offers a much warmer climate, peaking at a pleasant 27°C (81°F). In contrast, February sees much colder conditions, with minimums dropping to -27°C (-16°F) and an average of -8°C (18°F), only rising to a maximum of 11°C (53°F). Although both months experience precipitation over 12 days, April's total of 112 mm (4.4 in) outpaces February's 81 mm (3.2 in), reflecting the transition to spring. Humidity is slightly lower in April at 82% compared to February's 93%, contributing to a more comfortable environment. For a detailed look at February weather, visit Ottawa weather in February.
April's weather presents a notable shift compared to March, with a significant increase in average temperatures. While March sees lows around -24°C (-12°F) and an average of -3°C (27°F), April enjoys milder minimums of -12°C (10°F) and an average of 5°C (42°F), culminating in a warmer maximum of 27°C (81°F). Precipitation is slightly higher in April at 112 mm (4.4 in), compared to March’s 87 mm (3.4 in), but both months share an equal number of rainy days at 12. Humidity levels are relatively high in both months, with April at 82% compared to March's 86%. For a detailed look at March weather, you can check Ottawa weather in March.
April and May showcase a notable transition in weather patterns. In April, the temperatures range from a chilly minimum of -12°C (10°F) to a max of 27°C (81°F), with an average of 5°C (42°F). This month experiences significant precipitation, totaling 112 mm (4.4 in) over 12 days, and high humidity at 82%. In contrast, May brings milder temperatures, with a minimum of -3°C (26°F) and a maximum reaching 35°C (95°F), averaging 13°C (56°F). Precipitation slightly increases to 117 mm (4.6 in) over 14 days, but humidity decreases to 75%. For more details on May weather, you can visit Ottawa weather in May.
April and June present contrasting weather patterns, illustrating the transition from early spring to early summer. In April, temperatures fluctuate significantly, with a minimum of -12°C (10°F) and a maximum of 27°C (81°F), averaging around 5°C (42°F). The precipitation is relatively high at 112 mm (4.4 in), falling on about 12 days, and the humidity levels hover around 82%. In contrast, June offers a more stable climate, with minimum temperatures of 2°C (36°F) and maximums reaching 32°C (91°F), resulting in a comfortable average of 18°C (65°F). Rainfall decreases slightly to 98 mm (3.9 in) over 13 days, and the humidity drops to 68%, making June a more enjoyable month. For more details, check out this link: Ottawa weather in June.
April and July present contrasting weather patterns in terms of temperature and humidity. In April, temperatures range from a chilly minimum of -12°C (10°F) to a pleasant maximum of 27°C (81°F), with an average of 5°C (42°F) and a humidity level of 82%. The month experiences approximately 112 mm (4.4 in) of precipitation over 12 days. Conversely, July offers a much warmer climate, with temperatures ranging from a minimum of 8°C (47°F) to a maximum of 35°C (96°F), and an average temperature of 21°C (70°F). While July sees slightly more precipitation at 114 mm (4.5 in), the humidity decreases to 69%, creating a more comfortable atmosphere. For more details, you can check Ottawa weather in July.
April and August weather in Ottawa present contrasting experiences. In April, temperatures can range dramatically from a chilly minimum of -12°C (10°F) to a warm maximum of 27°C (81°F), with an average of 5°C (42°F). This month also sees relatively high precipitation at 112 mm (4.4 in) across about 12 days, coupled with humidity levels peaking at 82%. In contrast, August offers a much milder climate, with minimum temperatures starting at 7°C (45°F) and peaking at a comfortable 32°C (89°F), averaging around 20°C (68°F). Precipitation during this month is slightly lower at 94 mm (3.7 in) over 13 days, and humidity decreases to 67%. For more details, check out Ottawa weather in August.
April and September present quite distinct weather patterns, reflecting the transition between spring and autumn. In April, temperatures can drop to a chilly -12°C (10°F), with an average of 5°C (42°F) and a maximum of 27°C (81°F), showcasing significant variability. The month also sees substantial precipitation, totaling 112 mm (4.4 in) over about 12 days, coupled with a high humidity of 82%. In contrast, September offers a milder experience, with minimum temperatures around 0°C (31°F) and an average of 15°C (60°F), peaking at a comfortable 32°C (90°F). The month generally receives less precipitation, about 79 mm (3.1 in) over 11 days, and has lower humidity at 72%. For a deeper look at September conditions, you can visit Ottawa weather in September.
April and October present a fascinating contrast in weather, despite having similar maximum temperatures. In April, temperatures range from a chilly -12°C (10°F) to a pleasant 27°C (81°F), with an average of 5°C (42°F). This month experiences a significant amount of rainfall, totaling 112 mm over 12 days, and a humidity level of 82%. On the other hand, October's temperatures are milder, with a minimum of -6°C (22°F), an average of 9°C (48°F), and the same maximum of 27°C (81°F). Precipitation is slightly higher in October at 132 mm, also over 12 days, and humidity is marginally increased at 83%. For a closer look at October's weather specifics, check out Ottawa weather in October.
April and November showcase distinct weather patterns, reflecting the transition from spring to late autumn. In April, temperatures range from a brisk -12°C (10°F) to a warm 27°C (81°F), with an average temperature of 5°C (42°F). The month experiences around 112 mm (4.4 in) of precipitation over 12 days, accompanied by a humidity level of 82%. In contrast, November is cooler, with a temperature range from -19°C (-2°F) to a maximum of 22°C (71°F) and an average of 0°C (33°F). Although it sees slightly less precipitation at 97 mm (3.8 in) over 14 days, it has a higher humidity level of 88%. This comparison highlights the significant temperature drop and increased humidity as the year transitions into its colder months. For more detailed insights, check out Ottawa weather in November.
In comparing April and December weather, April boasts a much wider temperature range, with minimums dipping to -12°C (10°F) and highs reaching 27°C (81°F), resulting in an average temperature of 5°C (42°F). In contrast, December temperatures are significantly colder, with minimums dropping to -29°C (-20°F) and a more moderate maximum of 14°C (58°F), leading to an average of -5°C (22°F). While April sees higher precipitation at 112 mm (4.4 in) over 12 days, December's precipitation total is slightly lower at 80 mm (3.2 in) but maintains the same number of rainy days. Additionally, December tends to be more humid, with levels reaching 89% compared to April's 82%. For a more detailed look at Ottawa's December weather, you can visit Ottawa weather in December.
As April unfolds in Ottawa, it signifies a dynamic shift from the lingering cold of winter to the hopeful warmth of spring. Temperatures begin to rise, bringing a pleasant contrast to the bitter chill that characterizes earlier months—yet, the month still embraces a blend of cool days and occasional frosts, reminding residents of winter’s retreat. With an average humidity of 82%, April is often marked by a mix of rainy days, which contribute to a total precipitation of 112 mm, making it one of the wetter months. This transitional period fosters an environment ripe for flourishing blossoms and vibrant greenery, setting the stage for the beautiful summer that lies ahead. For more insights into what to expect throughout the year, check out Ottawa Climate.