April Weather in Umatilla, United States

Last updated: June 24, 2025

In Umatilla, United States, the average temperature in April hovers around 22°C (72°F), with a range that can dip to a chilly 8°C (46°F) at night and soar to a sizzling 34°C (94°F) during the day. Expect about 80 mm (3.2 in) of precipitation spread over 8 days, contributing to an average humidity of 70%. Whether you're planning outdoor adventures or cozy indoor activities, be prepared for a blend of warm and refreshing weather!

April Temperature in Umatilla

In April in Umatilla, the average temperature is 22°C (72°F), with maximums reaching 34°C (94°F) and minimums dropping as low as 8°C (46°F). This variety in temperatures makes it essential to pack layers to ensure comfort during your travels.

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 22°C (72°F), with highs reaching up to 34°C (94°F) and lows dropping to around 8°C (46°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 total precipitation amount is 80 mm (3.2 in), occurring over a span of 8 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 80 mm (3.2 inches) of precipitation spread over approximately 8 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

April Humidity in Umatilla

In Umatilla in April, humidity is 70%. With an average temperature of 22°C (72°F), this humidity feels like a warm embrace, making travel slightly uncomfortable but still bearable; the air is thick and can leave you feeling sticky, so staying hydrated and taking frequent breaks is essential for enjoying your adventures.

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 70%, 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 reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the 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 11, which falls under the extreme 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	15°C (59°F)	47 mm (1.9 inches)	83%	moderate
February Weather	18°C (65°F)	57 mm (2.2 inches)	80%	very high
March Weather	19°C (67°F)	25 mm (1.0 inches)	75%	very high
April Weather	22°C (72°F)	80 mm (3.2 inches)	70%	extreme
May Weather	25°C (77°F)	97 mm (3.8 inches)	68%	extreme
June Weather	27°C (81°F)	190 mm (7.5 inches)	75%	extreme
July Weather	27°C (82°F)	221 mm (8.7 inches)	79%	extreme
August Weather	28°C (82°F)	203 mm (8.0 inches)	81%	extreme
September Weather	27°C (81°F)	153 mm (6.0 inches)	83%	extreme
October Weather	25°C (77°F)	80 mm (3.1 inches)	81%	very high
November Weather	19°C (67°F)	58 mm (2.3 inches)	82%	high
December Weather	17°C (62°F)	71 mm (2.8 inches)	84%	moderate