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April Weather in Eureka, United States

Last updated: June 24, 2025

In Eureka, United States, the average temperature in April is a cool 10°C (51°F), with extremes ranging from a chilly -8°C (18°F) to a warm 29°C (84°F). Visitors can expect about 117 mm (4.6 in) of precipitation over 12 days, contributing to an average humidity of 85%. An ideal time to embrace the unique climate!

April Temperature in Eureka

In April in Eureka, the average temperature is 10°C (51°F), with maximums reaching 29°C (84°F) and minimums dipping as low as -8°C (18°F). Travelers should be prepared for a wide range of temperatures and pack accordingly to enjoy their stay.

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

The chart illustrates April temperature patterns in Eureka, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Eureka, April typically has an average temperature of 10°C (51°F), with highs reaching up to 29°C (84°F) and lows dropping to around -8°C (18°F).
JanFebMarAprMayJunJulAugSepOctNovDec272941516474777470564034
Data source: Temperature data for Eureka 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 Eureka

In Eureka in April, the total precipitation amount is 117 mm (4.6 in), occurring over a span of 12 days.

April Precipitation Trends in Eureka

The chart displays monthly precipitation patterns in Eureka, 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. In Eureka, April typically receives around 117 mm (4.6 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec616810611716513810980691305655
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Eureka

In Eureka in April, humidity is 85%. With an average temperature of 10°C (51°F), this humidity feels like a damp chill enveloping you, making travel quite uncomfortable as your clothes cling to your skin and the air feels heavy, often leaving you longing for a dry, warmer environment.

April Average Humidity in Eureka

This chart illustrates the average monthly humidity levels in Eureka, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Eureka is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%83%84%85%79%82%80%81%80%82%88%84%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Eureka

In Eureka in April, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Eureka.

Maximum UV Index Levels in Eureka for April

The chart shows the monthly maximum UV Index (UVI) for Eureka 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. In April, the maximum UV index in Eureka typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357810111098642
Data source: Eureka 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.

How April Weather in Eureka Compares to Other Months

Weather in Eureka varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Eureka, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Eureka, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)61 mm (2.4 inches)82%moderate
February Weather-2°C (29°F)68 mm (2.7 inches)83%moderate
March Weather5°C (42°F)106 mm (4.2 inches)84%high
April Weather10°C (51°F)117 mm (4.6 inches)85%very high
May Weather18°C (64°F)165 mm (6.5 inches)79%very high
June Weather23°C (74°F)138 mm (5.4 inches)82%extreme
July Weather25°C (77°F)109 mm (4.3 inches)80%very high
August Weather23°C (74°F)80 mm (3.1 inches)81%very high
September Weather21°C (70°F)69 mm (2.7 inches)80%very high
October Weather13°C (56°F)130 mm (5.1 inches)82%high
November Weather4°C (40°F)56 mm (2.2 inches)88%moderate
December Weather1°C (34°F)55 mm (2.2 inches)84%low

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