April Weather in Cornwall, Canada

Last updated: April 22, 2025

In April, Cornwall, Canada experiences a notable transition as winter gradually gives way to spring. The maximum temperature peaks at a pleasant 18°C (65°F), while the average hovers around a cool 4°C (39°F), and a brisk minimum can drop to -8°C (18°F). This month sees 85 mm (3.4 in) of precipitation over 12 days, creating a damp atmosphere characterized by a humidity level of 86%. As nature awakens, residents and visitors alike can enjoy the refreshing, albeit unpredictable, weather that defines this lively springtime in Cornwall.

April Temperature in Cornwall

In April, Cornwall, Canada, begins to shake off the chill of winter, revealing a noticeable shift in temperatures. With minimums around -8°C (18°F), the harshest frosts have subsided, paving the way for an average temperature of 4°C (39°F). This month serves as a bridge to spring, where daytime highs can reach a delightful 18°C (65°F), hinting at the warmth to come in May. The progression from the depths of winter to the mildness of early spring is truly remarkable, as the skies become brighter and the landscape gradually transforms, reminding residents and visitors alike that a vibrant season is just around the corner.

April Weather in Cornwall: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Cornwall, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec232228394860676860503928
Data source: Temperature data for Cornwall generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

April Precipitation in Cornwall

In April, Cornwall, Canada experiences a notable precipitation amount of 85 mm (3.4 in), marking a slight increase from March's 75 mm. This monthly total is spread across 12 days, mirroring the precipitation frequency of the preceding month. As spring blooms, April's rainfall lays the foundation for the lush greenery to follow, setting a rhythm that continues into May with its 88 mm. Notably, the precipitation begins to crescendo in the late spring and early summer months, which often brings welcome moisture to the region after the more arid days of July. This trend illustrates the essential role April plays in the overall climate pattern, bridging the transition from winter’s chill to the warm embrace of summer.

April Precipitation Trends in Cornwall

The chart displays monthly precipitation patterns in Cornwall, with values for each month alongside April's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec8193758588976873977713597
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Cornwall

In April, Cornwall, Canada, experiences a noticeable consistency in humidity, maintaining a level of 86% that mirrors the slightly higher readings from March. This slight rise suggests a transition into the wetter spring months, as the area prepares for the warmer summer ahead. The steady humidity trends from earlier months, with January and February both at 84%, indicate a persistently moist climate throughout the winter and into spring. Interestingly, such humidity levels remain stable through May before dipping slightly in the summer, showcasing a unique pattern of moisture that supports the lush landscapes of the region. Overall, April's humidity is a crucial element in shaping both the climate and the vibrant natural beauty of Cornwall.

April Average Humidity in Cornwall

This chart illustrates the average monthly humidity levels in Cornwall, with April's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how April's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec84%84%86%86%85%82%86%87%85%85%85%84%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Cornwall

As spring unfolds in Cornwall, Canada, April marks a significant shift in the UV Index, rising to 7, categorizing it as high exposure. This increase signals that residents and visitors should be more mindful of sun safety, as the burn time decreases to just 25 minutes—a stark contrast to the more forgiving months of winter. The trend of intensifying UV levels continues into May, with an even higher index of 8, emphasizing the need for protective measures as outdoor activities become more prevalent. To stay informed about UV levels and ensure safe outdoor enjoyment, explore the Cornwall UV Index.

Maximum UV Index Levels in Cornwall for April

The chart shows the monthly maximum UV Index (UVI) for Cornwall in April, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2357810887532
Data source: Cornwall April 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.

April Sunshine in Cornwall

April in Cornwall, Canada, shines brightly with 243 hours of sunshine, marking a delightful transition into spring. This month not only surpasses the sunny days of January, February, and March but also sets the stage for an impressive rise towards summer. As the days grow longer and warmer, April's sunshine brings an invigorating energy that hints at the approaching peak of 351 hours in August. The trend is clear: as the year progresses, Cornwall experiences a gradual increase in sunlight, culminating in the vibrant summer months. Enjoy the blooming landscapes and outdoor adventures that April's rays have to offer, as they promise the warmth of the coming season.

Monthly Sunshine Duration in Cornwall: April Highlighted

The April sunshine duration represents the total number of hours Cornwall experiences direct sunlight during the month of April, excluding cloudy or obstructed periods. This chart compares the sunshine duration of April with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec98h170h228h243h295h329h341h351h271h220h143h123h
Data source: Cornwall April Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Cornwall During April

April in Cornwall, Canada, offers a 28% chance of sunny weather, which is a slight dip from the 45% seen in March. This decline is not unusual as the transition from early spring to late spring brings variability in climate patterns. The likelihood of sunshine in April still surpasses the dreariness of winter months like January and February, when the chances linger around 16% and 27%, respectively. As warmer months approach, the probability of sunshine generally increases, peaking in late summer with 44% in August. Thus, while April may not be the sunniest month, it marks a transition towards brighter days ahead, encouraging outdoor activities as nature awakens.

Percentage of Sunny Days in April in Cornwall

The chart illustrates the percentage of sunny days in Cornwall throughout the year, with April 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 Cornwall experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec16%27%45%28%41%42%27%44%42%34%34%29%
Data source: Cornwall April chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Cornwall in April

As April arrives in Cornwall, Canada, residents eagerly welcome an increase in daylight hours, basking in approximately 13 hours of sunlight—a marked improvement from the 11 hours seen in March. This uplifting trend signals the arrival of spring, as days gradually lengthen leading into the summer months. Following April, May blesses the region with 14 hours of daylight, reaching 15 hours in both June and July, providing ample time for outdoor activities and social gatherings. As the year progresses, daylight hours begin to taper off, with the sun setting earlier by autumn. This seasonal rhythm not only highlights the beauty of nature but also enhances the vibrant lifestyle that characterizes Cornwall throughout the year.

Average Daylight Hours in Cornwall for April

The chart illustrates the variation in daylight duration in Cornwall throughout the year, with April highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 4m10h 20m11h 57m13h 35m14h 59m15h 42m15h 19m14h 4m12h 29m10h 51m9h 24m8h 39m
Data source: Cornwall daylight hours, calculated by summing the hours between sunrise and sunset for each day.

April Winds in Cornwall

As April breezes into Cornwall, Canada, the wind speaks of transitions. With an average wind speed of 5.6 m/s (13 mph), April's gusts reflect a slight dip from March's lively 6.2 m/s (14 mph), heralding the softer breath of spring after the biting chill of winter. This trend aligns with the gradual decrease observed heading into summer, as May dips further to 5.2 m/s (12 mph). Interestingly, while winter months showcase stronger winds, April offers a gentle reminder of nature's awakening, balancing energy and calm before the summer's more tranquil breezes arrive. Overall, Cornwall's wind pattern illustrates a dance between briskness and serenity, inviting both exploration and reflection in the heart of spring.

Average April Wind Speed in Cornwall

The chart displays monthly wind speed patterns in Cornwall, with values for each month shown alongside April's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how April's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec5.35.76.25.6 m/s5.25.44.74.65.54.55.86.2
Data source: Cornwall April wind data, generated using information from the Copernicus Climate Change Service.

How April Weather in Cornwall Compares to Other Months

The weather in Cornwall 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 Cornwall and find detailed weather information for every month.

April and January present quite contrasting weather patterns. In April, temperatures begin to rise, with a minimum of -8°C (18°F), averaging around 4°C (39°F), and peaking at 18°C (65°F). This month also sees increased precipitation, totaling 85 mm (3.4 in) over about 12 days, accompanied by high humidity levels at 86%. In comparison, January is significantly colder, with temperatures ranging from a minimum of -20°C (-3°F) to an average of -5°C (23°F) and a maximum of only 14°C (58°F). The precipitation in January is slightly less, totaling 81 mm (3.2 in) over 10 days, with humidity remaining relatively low at 84%. For more detailed information on January weather, you can check Cornwall weather in January.

When comparing the weather in February and April, notable differences are evident. February typically experiences colder temperatures, with a minimum of -20°C (-4°F) and an average of -5°C (22°F), while April sees milder conditions, with a minimum of -8°C (18°F) and an average of 4°C (39°F). Precipitation levels are somewhat similar, with February receiving 93 mm (3.7 in) and April slightly less at 85 mm (3.4 in), both spanning 12 days. Notably, April's humidity is slightly higher at 86%, compared to February's 84%. This shift in temperature and humidity marks a clear transition from winter to spring, making April feel considerably more temperate. For more detailed insights on February weather, visit Cornwall weather in February.

In comparing the weather between March and April, April experiences a notable rise in temperatures, with a minimum of -8°C (18°F) and an average of 4°C (39°F), whereas March sees much colder values with a minimum of -19°C (-2°F) and an average of -2°C (28°F). The maximum temperatures in April also peak at a pleasant 18°C (65°F), significantly warmer than March's maximum of 11°C (53°F). While both months share the same humidity level of 86%, April has slightly more precipitation, totaling 85 mm (3.4 in) over 12 days compared to March's 75 mm (2.9 in) over 13 days. For more details on March weather, see Cornwall weather in March.

April and May show a notable progression in weather conditions, with May generally experiencing milder temperatures and slightly higher highs. In April, temperatures range from a chilly -8°C (18°F) at night to a maximum of 18°C (65°F), while May sees a minimum of -3°C (27°F) and peaks at 24°C (76°F). Precipitation levels remain similar, with April receiving 85 mm over 12 days and May slightly increasing to 88 mm over 13 days. Despite the added rainfall, humidity levels remain fairly consistent at 86% in April and 85% in May. For more detailed insights, check out Cornwall weather in May.

April and June present contrasting weather patterns. In April, temperatures range from a chilly minimum of -8°C (18°F) to a comfortable maximum of 18°C (65°F), with an average of 4°C (39°F). The month experiences significant precipitation of 85 mm (3.4 in) over 12 days, coupled with high humidity at 86%. In contrast, June boasts much warmer temperatures, with a minimum of 0°C (33°F) and a maximum reaching 29°C (84°F), averaging at 15°C (60°F). Although June sees a slight increase in precipitation to 97 mm (3.8 in) over 12 days, the humidity drops to 82%. This shift marks a transition from the cool, damp days of April to the warmer and more vibrant days of June. For more specific details about June weather, you can visit Cornwall weather in June.

April and July weather present a stark contrast in both temperature and precipitation. In April, temperatures range from a chilly minimum of -8°C (18°F) to a mild maximum of 18°C (65°F), with an average of around 4°C (39°F). The month sees about 85 mm (3.4 in) of precipitation, occurring on roughly 12 days, all while maintaining a high humidity level of 86%. In comparison, July offers a much warmer climate, with temperatures ranging from a minimum of 11°C (52°F) to a hot maximum of 30°C (85°F), and an average of 20°C (67°F). The total precipitation for July is lower at 68 mm (2.7 in) over approximately 10 days, yet the humidity remains constant at 86%. For a more detailed look at July weather, you can visit Cornwall weather in July.

April and August present contrasting weather experiences. In April, temperatures range from a chilly -8°C (18°F) at night to a mild 18°C (65°F) during the day, with an average of 4°C (39°F). The month tends to be quite wet, with around 85 mm (3.4 in) of precipitation over 12 days and humidity levels hovering at 86%. In contrast, August enjoys a warmer climate, featuring minimum temperatures of 11°C (51°F) and reaching a pleasant maximum of 30°C (86°F), leading to an average of 20°C (68°F). Although August has slightly less precipitation, about 73 mm (2.9 in) over 10 days, humidity remains comparable at 87%. For more details on the climatic conditions during August, you can check out Cornwall weather in August.

April and September present distinctly different weather profiles. In April, temperatures range from a chilly minimum of -8°C (18°F) to a mild maximum of 18°C (65°F), with an average of 4°C (39°F). The month experiences considerable precipitation, with 85 mm (3.4 in) falling over about 12 days, resulting in high humidity of 86%. In contrast, September offers warmer temperatures, with a minimum of 3°C (38°F) and a comfortable maximum of 27°C (82°F), averaging 16°C (61°F). Precipitation slightly increases to 96 mm (3.8 in), but it occurs over fewer days, approximately 10, leading to a slightly lower humidity level of 85%. For more details on September weather, check out Cornwall weather in September.

April and October present notable differences in weather conditions. In April, temperatures typically range from a brisk -8°C (18°F) at night to a mild 18°C (65°F) during the day, with an average temperature of around 4°C (39°F). The month also experiences higher humidity at 86% and significant precipitation totaling 85 mm (3.4 in) over approximately 12 days. In contrast, October offers a more temperate climate with minimum temperatures of -2°C (29°F) and daytime highs reaching 24°C (75°F), averaging 10°C (50°F). This month sees slightly less precipitation at 77 mm (3.0 in) spread over 11 days and maintains a similar humidity level of 85%. For those interested in the specific weather patterns in Cornwall, October is a particularly fascinating time to explore. Cornwall weather in October

April and November offer distinct weather experiences, despite having similar average temperatures. In April, temperatures range from a minimum of -8°C (18°F) to a maximum of 18°C (65°F), with an average of 4°C (39°F). This month sees a moderate amount of precipitation, totaling 85 mm (3.4 in) over about 12 days, and the humidity is relatively high at 86%. In contrast, November features slightly colder temperatures, with lows of -12°C (10°F) and highs reaching up to 20°C (68°F), while maintaining the same average of 4°C (39°F). The precipitation increases to 135 mm (5.3 in) across 15 days and the humidity remains quite stable at 85%. For more insights, you can read about the specifics of Cornwall weather in November.

April and December present notably different weather conditions. In April, temperatures climb from a chilly minimum of -8°C (18°F) to a more moderate average of 4°C (39°F), peaking at a maximum of 18°C (65°F). The month experiences about 85 mm (3.4 inches) of precipitation over 12 days, accompanied by high humidity levels of 86%. In contrast, December is significantly colder, with temperatures ranging from a minimum of -19°C (-3°F) to an average of -2°C (29°F) and a maximum of 14°C (58°F). Although it is just slightly wetter with 97 mm (3.8 inches) of precipitation over 13 days, the humidity remains relatively low at 84%. For more details on December weather, you can explore Cornwall weather in December.

Compare Cornwall's Climate with Cities Worldwide

Conclusion: What to Expect From April Weather in Cornwall

April in Cornwall marks a significant transition from the brisk chill of winter to the promise of spring. While temperatures begin to rise, the mix of refreshing breezes and lingering cold can create a somewhat unpredictable weather experience. With an average temperature hovering around 4°C, days can oscillate between mild sunshine and unexpected showers, accompanied by high humidity levels. The month sees a notable amount of precipitation, with rain gracing about half of the days, making it a wetter period compared to the drier summer months ahead. For those looking to explore Cornwall this April, it’s essential to be prepared for variable conditions. To learn more about how these trends compare across the year, visit Cornwall Climate.