April Weather in Eureka, United States

Last updated: June 24, 2025

The average temperature in Eureka, United States during April hovers around 4°C (40°F). Expect a wide range, as temperatures can dip to a minimum of -19°C (-2°F) and peak at a maximum of 26°C (79°F). Precipitation is noted at 43 mm (1.7 in) over approximately 7 days, accompanied by an average humidity of 79%.

April Temperature in Eureka

In April in Eureka, the average temperature is 4°C (40°F). Maximums can reach 26°C (79°F), and minimums can be as low as -19°C (-2°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

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 4°C (40°F), with highs reaching up to 26°C (79°F) and lows dropping to around -19°C (-2°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 total precipitation amount is 43 mm (1.7 in) spread over a period of 7 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 43 mm (1.7 inches) of precipitation spread over approximately 7 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 79%. With an average temperature of 4°C (40°F), this humidity feels like a chilly dampness that wraps around you, making outdoor activities uncomfortable and leaving you longing for warmth as your breath hangs in the air.

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 79%, 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 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more 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 7, which falls under the 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	-10°C (15°F)	14 mm (0.6 inches)	81%	low
February Weather	-11°C (13°F)	17 mm (0.7 inches)	85%	moderate
March Weather	-1°C (30°F)	29 mm (1.1 inches)	76%	moderate
April Weather	4°C (40°F)	43 mm (1.7 inches)	79%	high
May Weather	13°C (56°F)	57 mm (2.2 inches)	76%	very high
June Weather	21°C (70°F)	59 mm (2.3 inches)	81%	very high
July Weather	23°C (74°F)	63 mm (2.5 inches)	82%	very high
August Weather	21°C (70°F)	102 mm (4.0 inches)	82%	very high
September Weather	16°C (62°F)	69 mm (2.7 inches)	77%	very high
October Weather	7°C (44°F)	63 mm (2.5 inches)	76%	moderate
November Weather	0°C (32°F)	14 mm (0.5 inches)	84%	moderate
December Weather	-6°C (22°F)	27 mm (1.1 inches)	81%	low