April Weather in Saint Helens, United States

Last updated: February 24, 2025

April in Saint Helens, United States showcases a dynamic range of temperatures, with a maximum reaching 29°C (85°F) and a minimum dipping to -1°C (30°F). The average temperature settles around a comfortable 10°C (51°F), making it a transitional month as spring unfolds. However, residents should prepare for significant precipitation, totaling around 140 mm (5.5 in) over approximately 16 days of rain, contributing to a high humidity level of 83%. With such variability, April in Saint Helens is a reminder of nature’s unpredictability, offering both warmth and refreshing showers.

April Temperature in Saint Helens

In April, Saint Helens experiences a delightful transition into spring, with temperatures showing a noticeable upward trend. The minimum temperature rises to a comfortable -1°C (30°F), while the average climbs to 10°C (51°F), offering a pleasant relief from the chillier months. The contrast becomes even more striking as the maximum temperature can reach an impressive 29°C (85°F), inviting residents to enjoy outdoor activities as nature begins to bloom. This month not only marks a significant warming but also sets the stage for the warmer days ahead, making April a pivotal time to embrace the vibrant changes in weather and scenery.

April Weather in Saint Helens: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Saint Helens, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec414045505762676963524540
Data source: Temperature data for Saint Helens 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.

April Precipitation in Saint Helens

In April, Saint Helens experiences a significant shift in precipitation as the region transitions into spring. With a total of 140 mm (5.5 in) of rainfall over 16 days, April marks a decrease from the wetter months of winter, specifically from January and February, which both averaged a robust 205 mm (8.1 in). This trend continues into May when precipitation drops further to just 73 mm (2.9 in), signaling the onset of drier conditions. The reduction in rainfall not only reflects the region’s seasonal changes but also highlights a pattern of diminished precipitation as the year progresses towards summer. Thus, April serves as a bridge between the heavy rains of early spring and the impending dry months, offering a unique glimpse into the Pacific Northwest's dynamic climate.

April Precipitation Trends in Saint Helens

The chart displays monthly precipitation patterns in Saint Helens, 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.
JanFebMarAprMayJunJulAugSepOctNovDec205205163140736291190149209224
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Saint Helens

In April, Saint Helens experiences a slight dip in humidity, with levels averaging 83%, down from the consistent 85% seen in the first three months of the year. This gradual decrease continues into May and June, suggesting a transition towards the drier summer months. Interestingly, humidity remains higher during the late fall and winter, peaking at 87% in both November and December. Overall, April’s humidity reflects the region's characteristic dampness while hinting at a shift toward more comfortable conditions as the year progresses.

April Average Humidity in Saint Helens

This chart illustrates the average monthly humidity levels in Saint Helens, 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.
JanFebMarAprMayJunJulAugSepOctNovDec85%84%85%83%83%84%82%74%71%81%87%87%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Saint Helens

As April unfolds in Saint Helens, United States, residents can expect a noticeable uptick in UV radiation, with the UV Index climbing to 6, categorized as high. This shift marks a significant transition from the moderate levels seen in March, bringing with it a reduced burn time of just 25 minutes. As the days grow longer and sunnier, it’s essential to stay vigilant about skin protection, especially with the UV Index reaching even higher peaks in the upcoming months of May and June. The trend towards increased sun exposure continues, urging residents to be proactive in safeguarding their skin as they enjoy the beauty of spring. For detailed information on daily UV levels, check out Saint Helens UV Index.

Maximum UV Index Levels in Saint Helens for April

The chart shows the monthly maximum UV Index (UVI) for Saint Helens 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.
JanFebMarAprMayJunJulAugSepOctNovDec23569101087532
Data source: Saint Helens 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 Saint Helens

April in Saint Helens shines brightly with 229 hours of sunshine, marking a delightful transition into spring. This surge in sunlight is a promising precursor to the even sunnier days ahead, as May delights with 282 hours, paving the way for the peak summer months. Notably, the trend showcases a steady increase from the winter's 88 hours in January to the blooming vibrancy of April, illustrating how the region shakes off the winter chill. As summer approaches, the long, sunlit days continue to mesmerize, reaching their pinnacle in July with a remarkable 374 hours. April, with its blossoming charm and rising sun, serves as a beautiful reminder of the energy and warmth that the season brings, setting the stage for the golden months ahead.

Monthly Sunshine Duration in Saint Helens: April Highlighted

The April sunshine duration represents the total number of hours Saint Helens 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.
JanFebMarAprMayJunJulAugSepOctNovDec88h123h195h229h282h318h374h335h268h211h136h115h
Data source: Saint Helens April Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Saint Helens During April

As April approaches in Saint Helens, the likelihood of sunny weather significantly increases, with a 53% chance of sunshine—a notable rise from the 35% seen in March. This trend continues the upward trajectory from the winter months, where sunshine chances lingered around a mere 15%. Following April, sunny days remain fairly stable into May before reaching a peak in July at 73%. Overall, if you're dreaming of brighter days, April marks a turning point, welcoming a refreshing uptick in sunshine that hints at the warmer months ahead.

Percentage of Sunny Days in April in Saint Helens

The chart illustrates the percentage of sunny days in Saint Helens 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 Saint Helens experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec15%15%35%53%38%61%73%55%49%28%14%12%
Data source: Saint Helens April chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Saint Helens in April

As April unfolds in Saint Helens, the days grow noticeably longer, offering 13 hours of daylight—an increase that marks a delightful transition from the shorter days of winter. Following the trend of gradual lengthening since January's 9 hours, April stands as a significant milestone, paving the way for brighter May and June, where daylight peaks at 14 and 15 hours respectively. This steady rise in sunlight not only invites longer outdoor activities but also signals the vibrant arrival of spring, as the world awakens from its winter slumber, encouraging both residents and nature to embrace the warmth and light ahead.

Average Daylight Hours in Saint Helens for April

The chart illustrates the variation in daylight duration in Saint Helens throughout the year, with April highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 7m10h 23m11h 57m13h 34m14h 56m15h 38m15h 15m14h 1m12h 28m10h 51m9h 27m8h 43m
Data source: Saint Helens daylight hours, calculated by summing the hours between sunrise and sunset for each day.

April Winds in Saint Helens

In April, the winds in Saint Helens, United States, settle into a gentle rhythm, with an average wind speed of 2.1 m/s (5 mph). This slight dip from the previous months reflects a transitional period as winter whispers farewell and spring begins to take hold. Interestingly, the wind speed in April is the lowest recorded in the first half of the year, suggesting a calmness that may complement the blooming scenery. As the seasons progress towards May—where winds pick up again to 2.5 m/s (6 mph)—this April lull provides a perfect backdrop for enjoying the resurgence of nature, making it an ideal time for tranquil walks and outdoor exploration in the crisp spring air.

Average April Wind Speed in Saint Helens

The chart displays monthly wind speed patterns in Saint Helens, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.52.52.22.1 m/s2.52.22.72.42.22.62.72.5
Data source: Saint Helens April wind data, generated using information from the Copernicus Climate Change Service.

How April Weather in Saint Helens Compares to Other Months

The weather in Saint Helens 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 Saint Helens and find detailed weather information for every month.

April weather in Saint Helens contrasts significantly with January's chill, showcasing a shift towards milder temperatures. While January experiences a minimum of -14°C (7°F) and an average of 5°C (41°F), April offers a more comfortable minimum of -1°C (30°F) and an average temperature reaching 10°C (51°F). Notably, April can see a maximum temperature as high as 29°C (85°F), making it feel much warmer than the cold peaks of January, which cap at 14°C (58°F). Precipitation is also notable, with April receiving 140 mm (5.5 in) over 16 days compared to January's 205 mm (8.1 in) over 17 days, reflecting a similar tendency for wet weather but less intensity overall in April. Both months show high humidity, with January at 85% and April slightly lower at 83%. For more details, check out Saint Helens weather in January.

April and February exhibit notable differences in weather patterns. In April, temperatures range from a chilly minimum of -1°C (30°F) to a pleasant maximum of 29°C (85°F), with an average temperature of 10°C (51°F). The month sees around 140 mm (5.5 in) of precipitation, occurring over 16 days, and maintains a humidity level of 83%. In contrast, February is colder, with temperatures varying from -7°C (19°F) to a maximum of 17°C (62°F), yielding a lower average temperature of 4°C (40°F). February experiences higher precipitation levels at 205 mm (8.1 in) over 20 days, coupled with a slightly higher humidity of 84%. For more details on February weather, visit Saint Helens weather in February.

April generally presents a more variable weather pattern compared to March, as the temperature range widens and averages rise. While March has cooler temperatures with a minimum of -3°C (27°F) and an average of 7°C (45°F), April features slightly milder conditions, with a minimum of -1°C (30°F) and an average of 10°C (51°F). However, April also experiences a higher maximum temperature of 29°C (85°F), suggesting more warm days. Precipitation is common in both months, with March recording 163 mm (6.4 in) over 18 days and April showing 140 mm (5.5 in) over 16 days, indicating that while April has slightly less precipitation, it still remains a reasonably wet month. The humidity remains relatively stable, slightly higher in March at 85% compared to April’s 83%. For more detailed insights, check out Saint Helens weather in March.

April and May exhibit notable differences in weather patterns, with May generally offering milder conditions. In April, temperatures can dip as low as -1°C (30°F), while the average is around 10°C (51°F), peaking at 29°C (85°F). The month sees significant precipitation, totaling 140 mm (5.5 in) over 16 days, maintaining a high humidity level of 83%. In contrast, May starts off warmer with a minimum temperature of 3°C (37°F) and an average of 14°C (57°F), reaching a maximum of 32°C (90°F). Additionally, May experiences less rainfall, accumulating 73 mm (2.9 in) over just 11 days, while humidity remains steady at 83%. For more specific details, check out Saint Helens weather in May.

April and June showcase distinct weather patterns, reflecting the transition from spring to summer. In April, temperatures vary significantly, with a minimum of -1°C (30°F) and a maximum of 29°C (85°F), leading to an average of 10°C (51°F). This month also sees considerable precipitation, totaling 140 mm (5.5 in) over 16 days, contributing to a high humidity level of 83%. In contrast, June brings warmer conditions, with a minimum temperature of 6°C (43°F), an average of 17°C (63°F), and a striking maximum of 45°C (113°F). Rainfall decreases significantly to 62 mm (2.5 in) across just 9 days, while humidity remains constant at 83%. For more detailed insights, you can explore Saint Helens weather in June.

When comparing the weather in April and July, the differences are quite striking. April experiences a wider range of temperatures, with a minimum of -1°C (30°F) and a maximum of 29°C (85°F), averaging around 10°C (51°F). This month also sees considerable precipitation, with 140 mm (5.5 in) falling over 16 days, leading to higher humidity levels at 83%. In contrast, July offers much warmer temperatures, ranging from a minimum of 8°C (46°F) to a scorching maximum of 37°C (99°F), with an average of 20°C (68°F). Precipitation is minimal in July, totaling just 9 mm (0.3 in) across only 2 days, and humidity levels remain relatively consistent at 82%. For a more detailed overview of the July weather, you can check Saint Helens weather in July.

April and August present contrasting weather conditions. In April, temperatures can drop as low as -1°C (30°F) with an average of 10°C (51°F) and a maximum reaching 29°C (85°F). The month is also characterized by significant rainfall, with approximately 140 mm (5.5 in) spread over 16 days, and high humidity at 83%. In stark contrast, August boasts milder nighttime temperatures starting at 8°C (47°F) and an average of 20°C (69°F), while the mercury can soar to a scorching 39°C (102°F) during the day. Precipitation in August is minimal, with only 11 mm (0.4 in) falling over just 2 days, resulting in a lower humidity level of 74%. For more specific details about August weather, you can refer to Saint Helens weather in August.

April and September present contrasting weather patterns, each with its own unique characteristics. In April, temperatures can range from a chilly -1°C (30°F) at night to a warm 29°C (85°F) during the day, with an average of 10°C (51°F). This month is marked by high humidity at 83% and considerable precipitation, totaling 140 mm (5.5 in) over about 16 days. In contrast, September enjoys milder temperatures, with lows around 6°C (43°F) and highs peaking at 35°C (95°F), averaging a comfortable 17°C (63°F). The month is drier, with only 90 mm (3.6 in) of precipitation and rain falling on just 9 days, along with lower humidity at 71%. For more details about September weather, you can check Saint Helens weather in September.

April and October present a transition in weather, both showcasing mild temperatures yet distinct characteristics. In April, temperatures range from a chilly -1°C (30°F) to a warm 29°C (85°F), with an average of 10°C (51°F), while October exhibits slightly cooler temperatures, featuring a minimum of -2°C (29°F) and a maximum of 26°C (78°F), averaging 11°C (52°F). Precipitation is notable in both months, with April receiving 140 mm (5.5 in) over 16 days compared to October's 149 mm (5.9 in) over 13 days. Humidity levels are also comparable, with April at 83% and October at 81%. For more specific insights, you can check out Saint Helens weather in October.

April and November present contrasting yet intriguing weather patterns. In April, temperatures range from a chilly minimum of -1°C (30°F) to a warm maximum of 29°C (85°F), with an average of 10°C (51°F). The month sees about 140 mm (5.5 in) of precipitation over 16 days, accompanied by a high humidity level of 83%. In contrast, November is colder overall, with temperatures dipping to a minimum of -3°C (27°F) and a maximum of 18°C (64°F), averaging at 7°C (46°F). It experiences higher rainfall at 209 mm (8.2 in) across 18 days and slightly increased humidity at 87%. For a deeper look into November's climate specifics, check out Saint Helens weather in November.

April and December showcase significantly different weather patterns. In April, temperatures range from a minimum of -1°C (30°F) to a maximum of 29°C (85°F), with an average of 10°C (51°F). Precipitation in April is moderate at 140 mm (5.5 in) over 16 days, while humidity averages around 83%. In contrast, December experiences colder conditions, with temperatures ranging from a low of -5°C (23°F) to a high of 15°C (59°F) and an average of 5°C (41°F). Additionally, December sees more precipitation at 224 mm (8.8 in) spread over 20 days, and a slight increase in humidity at 87%. For a more detailed look at December weather, you can check Saint Helens weather in December.

Compare Saint Helens's Climate with Cities Worldwide

Conclusion: What to Expect From April Weather in Saint Helens

April in Saint Helens marks a notable transition in weather as spring takes hold, characterized by a blend of mild temperatures and increased precipitation. Unlike the chill of winter or the sweltering heat of summer, April offers a refreshing average temperature that gently nudges above 10°C, bringing with it the promise of blooming nature. However, residents should prepare for frequent rainy days, as 16 days of precipitation contribute to a high humidity level of 83%, creating a lush and vibrant landscape. This unique combination of warmth and moisture distinguishes April from other months, inviting both adventurers and nature enthusiasts to revel in the renewal of the season. For a more detailed insight into what to expect throughout the year, visit Saint Helens Climate.