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April Weather in Eureka, United States

Last updated: June 24, 2025

In April, the average temperature in Eureka, United States hovers around 13°C (55°F). Temperatures can range dramatically, dipping to a chilly -4°C (25°F) at night and soaring up to a sweltering 31°C (88°F) during the day. Expect 124 mm (4.9 in) of precipitation spread over about 12 days, contributing to a notably high average humidity of 80%. Be prepared for a mix of weather this month!

April Temperature in Eureka

In April in Eureka, the average temperature is 13°C (55°F). The maximum can reach 31°C (88°F), while the minimum can drop as low as -4°C (25°F). This varied climate makes Eureka an intriguing destination for travelers seeking both warm days and crisp evenings.

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 13°C (55°F), with highs reaching up to 31°C (88°F) and lows dropping to around -4°C (25°F).
JanFebMarAprMayJunJulAugSepOctNovDec333647556676797672594539
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 124 mm (4.9 in) 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 124 mm (4.9 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec75811291241448895139561107057
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 80%. With an average temperature of 13°C (55°F), this humidity feels like a damp blanket wrapping around you, making any outdoor activity feel stifling and heavy, which can lead to fatigue for travelers unaccustomed to such moist conditions.

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 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%80%80%80%82%83%81%80%76%76%85%86%
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 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check 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 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101110109753
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 Weather0°C (33°F)75 mm (3.0 inches)82%moderate
February Weather2°C (36°F)81 mm (3.2 inches)80%moderate
March Weather8°C (47°F)129 mm (5.1 inches)80%high
April Weather13°C (55°F)124 mm (4.9 inches)80%very high
May Weather19°C (67°F)144 mm (5.7 inches)82%very high
June Weather24°C (76°F)88 mm (3.5 inches)83%extreme
July Weather26°C (80°F)95 mm (3.7 inches)81%very high
August Weather24°C (76°F)139 mm (5.5 inches)80%very high
September Weather22°C (72°F)56 mm (2.2 inches)76%very high
October Weather15°C (59°F)110 mm (4.3 inches)76%high
November Weather7°C (45°F)70 mm (2.8 inches)85%moderate
December Weather4°C (40°F)57 mm (2.2 inches)86%moderate

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