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April Weather in Eureka, United States

Last updated: June 24, 2025

In April, the average temperature in Eureka, United States is a cool 8°C (46°F). Be prepared for a wide range of temperatures, with a minimum of -7°C (19°F) and a maximum reaching up to 27°C (81°F). Expect about 39 mm (1.5 in) of precipitation over 8 days, while the average humidity hovers around 71%. Stay cozy and enjoy the seasonal nuances!

April Temperature in Eureka

In April in Eureka, the average temperature is 8°C (46°F), with maximums reaching up to 27°C (81°F) and minimums dropping as low as -7°C (19°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for both warm and cold conditions.

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 8°C (46°F), with highs reaching up to 27°C (81°F) and lows dropping to around -7°C (19°F).
JanFebMarAprMayJunJulAugSepOctNovDec252734465468767564483926
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 precipitation amount is 39 mm (1.5 in) over the course of 8 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 39 mm (1.5 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec29295739391016912222229
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 71%. With an average temperature of 8°C (46°F), this humidity feels like a damp chill that envelops you, making outdoor activities less enjoyable and requiring you to dress in layers to stay comfortable while exploring the surroundings.

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 71%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%87%80%71%55%51%41%32%41%61%79%83%
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.
JanFebMarAprMayJunJulAugSepOctNovDec46991112121110754
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-4°C (25°F)29 mm (1.1 inches)84%moderate
February Weather-3°C (27°F)29 mm (1.1 inches)87%high
March Weather1°C (35°F)57 mm (2.3 inches)80%very high
April Weather8°C (46°F)39 mm (1.5 inches)71%very high
May Weather12°C (55°F)39 mm (1.5 inches)55%extreme
June Weather20°C (68°F)10 mm (0.4 inches)51%extreme
July Weather25°C (77°F)16 mm (0.6 inches)41%extreme
August Weather24°C (75°F)9 mm (0.3 inches)32%extreme
September Weather18°C (65°F)12 mm (0.5 inches)41%very high
October Weather9°C (48°F)22 mm (0.9 inches)61%high
November Weather4°C (39°F)22 mm (0.8 inches)79%moderate
December Weather-3°C (26°F)29 mm (1.1 inches)83%moderate

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