April Weather in Umatilla, United States

Last updated: June 24, 2025

In Umatilla, United States, the average temperature in April hovers around 13°C (55°F), making it a moderate time of year. Be prepared for temperatures to swing, with a minimum dipping as low as -2°C (29°F) and peaking at a warm 32°C (90°F). Expect about 24 mm (0.9 in) of precipitation spread over 5 days, contributing to the relatively high average humidity of 83%. Stay comfortable and plan ahead!

April Temperature in Umatilla

In April in Umatilla, the average temperature is 13°C (55°F), with maximums reaching up to 32°C (90°F) and minimums dropping as low as -2°C (29°F). This range makes Umatilla a perfect destination for travelers seeking both warmth and the chance to experience a cool retreat.

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

The chart illustrates April temperature patterns in Umatilla, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Umatilla, April typically has an average temperature of 13°C (55°F), with highs reaching up to 32°C (90°F) and lows dropping to around -2°C (29°F).

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

April Precipitation in Umatilla

In Umatilla in April, the precipitation amount is 24 mm (0.9 in) over the course of 5 days.

April Precipitation Trends in Umatilla

The chart displays monthly precipitation patterns in Umatilla, 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 Umatilla, April typically receives around 24 mm (0.9 inches) of precipitation spread over approximately 5 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 Umatilla

In Umatilla in April humidity is 83%. With an average temperature of 13°C (55°F), this humidity feels like a damp embrace, often leaving travelers feeling slightly sticky and in need of frequent breaks in the shade.

April Average Humidity in Umatilla

This chart illustrates the average monthly humidity levels in Umatilla, 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 Umatilla is approximately 83%, 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 Umatilla

In Umatilla in April, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Umatilla, you can refer to this Hourly UV Index in Umatilla.

Maximum UV Index Levels in Umatilla for April

The chart shows the monthly maximum UV Index (UVI) for Umatilla 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 Umatilla typically reaches 6, which falls under the high exposure category.

Data source: Umatilla 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 Umatilla Compares to Other Months

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

This table compares monthly weather conditions in Umatilla, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	2°C (36°F)	35 mm (1.4 inches)	86%	low
February Weather	3°C (37°F)	46 mm (1.8 inches)	86%	moderate
March Weather	8°C (46°F)	30 mm (1.2 inches)	85%	moderate
April Weather	13°C (55°F)	24 mm (0.9 inches)	83%	high
May Weather	18°C (65°F)	15 mm (0.6 inches)	77%	very high
June Weather	23°C (73°F)	8 mm (0.3 inches)	81%	very high
July Weather	27°C (81°F)	0 mm (0.0 inches)	76%	very high
August Weather	26°C (79°F)	4 mm (0.1 inches)	60%	very high
September Weather	20°C (69°F)	9 mm (0.4 inches)	58%	high
October Weather	12°C (54°F)	26 mm (1.0 inches)	75%	moderate
November Weather	6°C (43°F)	34 mm (1.3 inches)	85%	moderate
December Weather	2°C (37°F)	33 mm (1.3 inches)	87%	low