April Weather in Eureka, United States

Last updated: June 24, 2025

In Eureka, United States, the average temperature in April hovers around 13°C (56°F), with a notable range where the minimum can dip to -6°C (21°F) and the maximum may reach 31°C (87°F). Expect about 100 mm (3.9 in) of precipitation spread over 10 days, and enjoy a relatively high average humidity of 73%.

April Temperature in Eureka

In April in Eureka, the average temperature is 13°C (56°F). The maximum can reach 31°C (87°F) and the minimum can be as low as -6°C (21°F). Be prepared for a wide range of temperatures when traveling to Eureka during this month.

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 (56°F), with highs reaching up to 31°C (87°F) and lows dropping to around -6°C (21°F).

Data source: Temperature data for Eureka generated using information from the Copernicus Climate Change Service.

April Precipitation in Eureka

In Eureka in April, the precipitation amount is 100 mm (3.9 in) over a span of 10 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 100 mm (3.9 inches) of precipitation spread over approximately 10 days.

Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

April Humidity in Eureka

In Eureka in April humidity is 73%. With an average temperature of 13°C (56°F), this humidity feels like a cool, damp embrace that can be quite refreshing yet may require a light jacket for comfort while exploring the outdoors.

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 73%, offering insight into how humid the weather typically is during this month.

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.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	1°C (34°F)	50 mm (2.0 inches)	77%	moderate
February Weather	2°C (35°F)	40 mm (1.6 inches)	76%	high
March Weather	9°C (49°F)	84 mm (3.3 inches)	71%	high
April Weather	13°C (56°F)	100 mm (3.9 inches)	73%	very high
May Weather	19°C (66°F)	203 mm (8.0 inches)	83%	very high
June Weather	25°C (77°F)	114 mm (4.5 inches)	83%	extreme
July Weather	26°C (80°F)	93 mm (3.7 inches)	81%	extreme
August Weather	25°C (78°F)	112 mm (4.4 inches)	73%	very high
September Weather	23°C (73°F)	77 mm (3.0 inches)	67%	very high
October Weather	14°C (58°F)	143 mm (5.6 inches)	72%	high
November Weather	8°C (46°F)	28 mm (1.1 inches)	82%	moderate
December Weather	4°C (40°F)	31 mm (1.2 inches)	85%	moderate