April Weather in Guerneville, United States

Last updated: February 24, 2025

April in Guerneville, United States, presents a captivating blend of springtime warmth and occasional showers. With maximum temperatures soaring up to 30°C (86°F), the days invite outdoor exploration, balanced by a refreshing average of 13°C (57°F) that offers cool respite. Nighttime can dip to a brisk minimum of 3°C (37°F), emphasizing the region's seasonal transition. April also sees about 47 mm (1.9 in) of rain over 6 days, contributing to the vibrant greenery characteristic of the area. With humidity levels around 80%, the atmosphere feels lush and invigorating—perfect for enjoying the natural beauty that Guerneville has to offer.

April Temperature in Guerneville

In April, Guerneville experiences a gentle warming trend that ushers in the spring season. With minimum temperatures rising to 3°C (37°F) and averages climbing to 13°C (57°F), the area begins to shed the chill of winter. The maximum temperature can soar up to 30°C (86°F), offering a delightful contrast to the earlier months. This significant increase not only invites locals and visitors to enjoy outdoor activities but also sets the stage for the warmer months ahead. As the days grow longer and sunnier, Guerneville bursts into life, making April a captivating time for nature lovers and adventure seekers alike.

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

The chart illustrates April temperature patterns in Guerneville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec495052566066686867625349
Data source: Temperature data for Guerneville 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 Guerneville

In April, Guerneville experiences a notable dip in precipitation, receiving only 47 mm (1.9 in) over 6 days of rain, marking a significant reduction from the earlier months like January and February, which saw 140 mm (5.5 in) and 157 mm (6.2 in), respectively. This trend reflects the transition into drier spring conditions, as the region prepares for the hot summer months ahead, where rainfall drops even further to just 30 mm (1.2 in) in May and a mere 2 mm (0.1 in) in June. As the landscape begins to dry out, the decreased precipitation in April hints at a shift from the winter's wet embrace to the warm, sun-kissed days that follow.

April Precipitation Trends in Guerneville

The chart displays monthly precipitation patterns in Guerneville, 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.
JanFebMarAprMayJunJulAugSepOctNovDec14015796473020024361102
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Guerneville

In April, Guerneville experiences a notable shift in humidity, dropping to 80%, a slight decrease from the preceding months that typically showcase higher levels. This transition marks the beginning of a gradual decline that continues into the warmer months, aligning with the onset of spring. Interestingly, the humidity remains steady at 80% through May, suggesting a period of stability before the summer heat starts to lower moisture levels further. As the year progresses into June and beyond, the humidity dips steadily, revealing a trend of decreasing moisture that aligns with rising temperatures, making Guerneville's climate not just pleasant but also inviting for outdoor activities during the sunnier seasons.

April Average Humidity in Guerneville

This chart illustrates the average monthly humidity levels in Guerneville, 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.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%83%80%80%76%70%66%68%72%84%84%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Guerneville

In April, Guerneville experiences a noticeable rise in solar intensity, with a UV Index peaking at 8 and shifting into the very high exposure category. This significant increase from March's 7 underlines a trend towards higher UV radiation as spring unfolds. With a burn time of just 15 minutes, outdoor enthusiasts should be particularly mindful of sun protection during this month. This pattern not only highlights the urgency of safeguarding skin in the warmer months ahead, but also sets the stage for an even more intense UV Index of 10 in May. For detailed information on UV trends throughout the year, check out the Guerneville UV Index.

Maximum UV Index Levels in Guerneville for April

The chart shows the monthly maximum UV Index (UVI) for Guerneville 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.
JanFebMarAprMayJunJulAugSepOctNovDec3578101111109643
Data source: Guerneville 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 Guerneville

April in Guerneville, United States, brings a welcoming increase in sunshine, reaching 295 hours, a clear sign that the days are getting longer and warmer. This month continues the upward trend from March, where the sun graced the landscape with 265 hours of light. As the year progresses, April's brilliance sets the stage for even sunnier days ahead, with May expected to boast 351 hours of sunshine. This inviting spring atmosphere not only enhances the natural beauty of the region but also encourages outdoor activities, making April a delightful time to experience Guerneville's vibrant charm as it shakes off the lingering chill of winter.

Monthly Sunshine Duration in Guerneville: April Highlighted

The April sunshine duration represents the total number of hours Guerneville 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.
JanFebMarAprMayJunJulAugSepOctNovDec141h211h265h295h351h374h375h333h306h275h216h184h
Data source: Guerneville April Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Guerneville During April

As spring unfolds in Guerneville, April stands out with a promising 71% chance of sunny weather, marking a significant increase from the preceding months. The transition from winter to spring is evident, as the likelihood of sunshine jumps from 39% in January to 64% in March. By April, residents and visitors can anticipate more pleasant days, setting the stage for outdoor activities and blooming landscapes. As we move further into the season, the chances of sun continue to rise, peaking in May at an impressive 84%. Overall, April serves as a delightful precursor to the sunnier months ahead, making it an ideal time to enjoy the natural beauty of Guerneville.

Percentage of Sunny Days in April in Guerneville

The chart illustrates the percentage of sunny days in Guerneville 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 Guerneville experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec39%58%64%71%84%78%79%80%72%52%48%36%
Data source: Guerneville April chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Guerneville in April

As spring unfolds in Guerneville, the daylight duration sees a remarkable increase, stretching from 11 hours in March to 13 hours in April. This trend marks a significant leap in sunlight, heralding the vibrant growth of flora and the invigorating warmth that characterizes the season. Following April, May continues the upward trajectory, boasting 14 hours of daylight, which lingers through the early summer months. The gradual shift from shorter winter days to the long, sun-soaked hours of spring and summer highlights the transition towards brighter, more lively days—a perfect backdrop for outdoor adventures and community gatherings in this charming part of the United States.

Average Daylight Hours in Guerneville for April

The chart illustrates the variation in daylight duration in Guerneville throughout the year, with April highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 48m10h 46m11h 59m13h 13m14h 16m14h 47m14h 30m13h 34m12h 22m11h 8m10h 3m9h 30m
Data source: Guerneville daylight hours, calculated by summing the hours between sunrise and sunset for each day.

April Winds in Guerneville

April in Guerneville brings a gentle uptick in average wind speed, reaching 3.2 m/s (7 mph), slightly higher than the preceding months of January, February, and March. This mild increase marks the transition towards the spring season, where the breeze begins to carry a hint of warmth and renewal. As the year progresses, we observe a noticeable rise in wind speeds peaking in May at 4.1 m/s (9 mph), creating a lively atmosphere just before summer. Interestingly, this month serves as a bridge, with the winds relaxing again into the warmer summer months. The pattern of wind speeds throughout the year reveals a dynamic landscape influenced by seasonal changes, making Guerneville's air both refreshing and invigorating in April.

Average April Wind Speed in Guerneville

The chart displays monthly wind speed patterns in Guerneville, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.43.02.93.2 m/s4.13.42.42.42.32.71.82.5
Data source: Guerneville April wind data, generated using information from the Copernicus Climate Change Service.

How April Weather in Guerneville Compares to Other Months

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

In comparing the weather between April and January, we can see notable differences in temperature and precipitation. April features a minimum temperature of 3°C, an average of 13°C, and can reach a maximum of 30°C, making it generally warmer than January, which has a minimum of -1°C and an average of 10°C, with a maximum of 25°C. In terms of precipitation, January is considerably wetter, recording 140 mm over 9 days, compared to April's 47 mm over 6 days. Interestingly, January also exhibits higher humidity at 86%, compared to April’s 80%. For more details on the conditions during January, visit Guerneville weather in January.

April and February exhibit notable differences in weather patterns. In April, temperatures range from a chilly 3°C (37°F) at their lowest to a warm 30°C (86°F) at their highest, with an average temperature of 13°C (57°F). In contrast, February experiences cooler temperatures, with a minimum of -3°C (27°F) and a maximum of 25°C (77°F), averaging 10°C (51°F). Precipitation is significantly higher in February, with 157 mm (6.2 in) over 8 days, compared to April’s 47 mm (1.9 in) recorded over 6 days. Additionally, humidity levels are slightly higher in February at 84%, compared to 80% in April. For more insights into February weather, visit Guerneville weather in February.

In comparing the weather of March and April, we can observe a notable increase in temperature from March to April. March experiences a minimum temperature of 0°C (32°F) and peaks at 26°C (80°F) with an average of 11°C (52°F), whereas April boasts a minimum of 3°C (37°F), an average of 13°C (57°F), and a maximum that reaches 30°C (86°F). Additionally, April sees a slight decrease in precipitation, dropping to 47 mm (1.9 in) over 6 days compared to March’s 96 mm (3.8 in) across 10 days. Humidity remains relatively comparable, with March at 83% and April at 80%, indicating that while April is warmer and drier, both months maintain a high level of moisture in the air. For more detailed insights into March's weather, you can refer to Guerneville weather in March.

April and May exhibit a notable transition in weather patterns. In April, temperatures range from a minimum of 3°C (37°F) to a maximum of 30°C (86°F), with an average of 13°C (57°F) and about 47 mm (1.9 in) of precipitation over 6 days. In contrast, May sees slightly warmer temperatures, with a minimum of 5°C (41°F), an average of 16°C (60°F), and a maximum of 33°C (91°F). Rainfall decreases to 30 mm (1.2 in) over just 3 days, while humidity remains steady at 80%. This shift indicates a warming trend as spring progresses. For more detailed weather insights, check Guerneville weather in May.

April and June exhibit distinct weather characteristics, with April experiencing a wider range of temperatures—from a minimum of 3°C (37°F) to a maximum of 30°C (86°F)—and averaging 13°C (57°F). In contrast, June features a more moderate temperature range, with a minimum of 9°C (48°F) and a maximum climbing to 37°C (99°F), averaging 19°C (67°F). Additionally, April tends to be wetter, with 47 mm (1.9 in) of precipitation over about six days, while June enjoys dry conditions with only 2 mm (0.1 in) and no rainfall days. Despite the slight drop in humidity from April's 80% to June's 76%, both months offer unique weather experiences. For more detailed June weather information, check out Guerneville weather in June.

April and July offer quite different weather experiences. In April, temperatures range from a chilly minimum of 3°C (37°F) to a pleasantly mild average of 13°C (57°F), peaking at a warm 30°C (86°F), accompanied by significant humidity at 80%. This month also sees an average of 47 mm (1.9 in) of precipitation over about six days, adding a touch of spring rain. In contrast, July boasts much warmer temperatures, with a minimum of 11°C (53°F) and an average of 20°C (68°F), soaring to a high of 35°C (95°F). Remarkably, July is dry, with no recorded precipitation and lower humidity at 70%. For a detailed look at July weather, check out Guerneville weather in July.

April and August showcase significant differences in weather patterns. In April, temperatures range from a chilly 3°C (37°F) at night to a mild 30°C (86°F) during the day, with an average temperature of 13°C (57°F). This month also sees a fair amount of precipitation, averaging 47 mm (1.9 in) over about six days, contributing to a high humidity level of 80%. In contrast, August reveals a warmer climate, with nighttime lows of 10°C (50°F) and daytime highs peaking at 35°C (96°F), averaging 20°C (68°F). Notably, this summer month enjoys significantly less rainfall, with zero precipitation and humidity at a lower 66%. For more details, check out Guerneville weather in August.

April and September present contrasting weather patterns. April shows a wide temperature range with minimums around 3°C (37°F) and maximums peaking at 30°C (86°F), accompanied by moderate precipitation of 47 mm (1.9 in) over six days and high humidity at 80%. In contrast, September boasts a milder climate with minimum temperatures rising to 8°C (47°F) and averages reaching 19°C (67°F), while maximum temperatures can soar to 40°C (103°F). Notably, September experiences significantly less rainfall with only 2 mm (0.1 in) and no rainy days, coupled with lower humidity levels at 68%. For more detailed information, you can explore Guerneville weather in September.

April and October both showcase mild temperatures, but their characteristics differ significantly. In April, temperatures range from a cool 3°C (37°F) to a pleasant average of 13°C (57°F), with a maximum reaching up to 30°C (86°F). It experiences more precipitation, totaling 47 mm (1.9 in) over about six days, coupled with higher humidity at 80%. In contrast, October offers a slightly warmer average temperature of 16°C (62°F) and can peak at 35°C (94°F), while only experiencing minimal precipitation of 43 mm (1.7 in) over just two days and lower humidity at 72%. This is indicative of a transition towards drier weather as the year progresses. For more details on weather patterns during this month, check out Guerneville weather in October.

In April, the weather is generally milder with temperatures ranging from a minimum of 3°C (37°F) to a maximum of 30°C (86°F), and average temperatures around 13°C (57°F). This month experiences about 47 mm (1.9 in) of precipitation spread over approximately 6 days, along with a humidity level of 80%. In contrast, November sees slightly cooler temperatures, with a minimum of -1°C (30°F) and a maximum of 27°C (81°F), while the average temperature remains similar at 12°C (54°F). November also has higher precipitation at 61 mm (2.4 in) but fewer rainy days, totaling 5, with humidity increasing slightly to 84%. For a more detailed look at the weather patterns, you can check out Guerneville weather in November.

When comparing the weather in April and December, April typically showcases warmer temperatures, with a minimum of 3°C and an average of 13°C, peaking at 30°C. In contrast, December's temperatures are cooler, ranging from a minimum of 0°C to a maximum of 24°C, with an average of 9°C. Precipitation levels are also notably different; while April experiences about 47 mm over 6 days, December has higher rainfall, totaling 102 mm over 9 days. Additionally, December tends to be slightly more humid at 84%, compared to April's 80%. For more detailed insights, you can check Guerneville weather in December.

Compare Guerneville's Climate with Cities Worldwide

Conclusion: What to Expect From April Weather in Guerneville

As April unfolds in Guerneville, the weather offers a striking transition into spring, marked by warmer temperatures and an invigorating humidity that differs noticeably from the cooler, wetter months preceding it. With maximum highs reaching up to 30°C (86°F), the days become more inviting, allowing for outdoor adventures. However, the occasional rain, with about six days of precipitation, reminds us that spring can bring its own set of surprises. This balance of warmth and moisture fosters the vibrant greenery that Guerneville is renowned for. For a deeper dive into how April compares with other months in Guerneville, be sure to explore Guerneville Climate.