May Weather in Mill Creek, United States

Last updated: June 24, 2025

In May, the average temperature in Mill Creek, United States hovers around 13°C (56°F), with a comfortable range that sees minimums of 5°C (41°F) and maximums reaching up to 26°C (79°F). Expect about 77 mm (3.0 in) of precipitation spread over 13 days, contributing to an average humidity level of 81%. This blend of mild temperatures and moisture creates a unique atmosphere throughout the month.

May Temperature in Mill Creek

In May in Mill Creek, the average temperature is 13°C (56°F), with maximums reaching 26°C (79°F) and minimums dropping as low as 5°C (41°F). It's a pleasant time for traveling, so pack accordingly to enjoy the mild weather.

May Weather in Mill Creek: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Mill Creek, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mill Creek, May typically has an average temperature of 13°C (56°F), with highs reaching up to 26°C (79°F) and lows dropping to around 5°C (41°F).

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

May Precipitation in Mill Creek

In Mill Creek in May, the precipitation amount is 77 mm (3.0 in) spread over a total of 13 days.

May Precipitation Trends in Mill Creek

The chart displays monthly precipitation patterns in Mill Creek, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Mill Creek, May typically receives around 77 mm (3.0 inches) of precipitation spread over approximately 13 days.

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

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Millimeters (mm) Inches (in)

May Humidity in Mill Creek

In Mill Creek in May, humidity is 81%. With an average temperature of 13°C (56°F), this humidity feels like a blanket of damp air that clings to your skin, making it essential to pack breathable clothing and stay hydrated while exploring.

May Average Humidity in Mill Creek

This chart illustrates the average monthly humidity levels in Mill Creek, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Mill Creek is approximately 81%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Mill Creek

In Mill Creek in May, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Mill Creek.

Maximum UV Index Levels in Mill Creek for May

The chart shows the monthly maximum UV Index (UVI) for Mill Creek in May, 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 May, the maximum UV index in Mill Creek typically reaches 8, which falls under the very high exposure category.

Data source: Mill Creek May 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 May Weather in Mill Creek Compares to Other Months

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

This table compares monthly weather conditions in Mill Creek, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	6°C (43°F)	178 mm (7.0 inches)	86%	low
February Weather	5°C (41°F)	177 mm (7.0 inches)	86%	moderate
March Weather	7°C (45°F)	128 mm (5.0 inches)	87%	moderate
April Weather	10°C (50°F)	117 mm (4.6 inches)	84%	high
May Weather	13°C (56°F)	77 mm (3.0 inches)	81%	very high
June Weather	16°C (61°F)	73 mm (2.9 inches)	82%	very high
July Weather	18°C (65°F)	27 mm (1.1 inches)	79%	very high
August Weather	19°C (66°F)	24 mm (0.9 inches)	63%	very high
September Weather	16°C (61°F)	99 mm (3.9 inches)	62%	high
October Weather	11°C (52°F)	163 mm (6.4 inches)	83%	moderate
November Weather	8°C (47°F)	188 mm (7.4 inches)	89%	low
December Weather	6°C (42°F)	199 mm (7.8 inches)	88%	low