May Weather in Delta, United States

Last updated: June 24, 2025

In May, the average temperature in Delta, United States is a pleasant 17°C (63°F). However, be prepared for temperature fluctuations, as it can drop to a chilly -1°C (30°F) at its lowest and soar to a warm 36°C (98°F) at its highest. Rainfall is moderate, with an average precipitation of 24 mm (1.0 in) spread across 5 days. You can expect a comfortable average humidity of 51%, making this month a delightful time to explore!

May Temperature in Delta

In May in Delta, the average temperature is 17°C (63°F), with a maximum reaching 36°C (98°F) and a minimum dropping as low as -1°C (30°F). Travelers should be prepared for a wide range of temperatures, making layers essential for comfort during their visit.

May Weather in Delta: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Delta, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Delta, May typically has an average temperature of 17°C (63°F), with highs reaching up to 36°C (98°F) and lows dropping to around -1°C (30°F).

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

May Precipitation in Delta

In Delta in May, the precipitation amount is 24 mm (1.0 in) spread over the course of 5 days.

May Precipitation Trends in Delta

The chart displays monthly precipitation patterns in Delta, 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 Delta, May typically receives around 24 mm (1.0 inches) of precipitation spread over approximately 5 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 Delta

In Delta in May humidity is 51%. With an average temperature of 17°C (63°F), this humidity feels like a pleasant and refreshing embrace, making it ideal for exploring outdoor attractions and enjoying leisurely strolls without feeling overly sticky or uncomfortable.

May Average Humidity in Delta

This chart illustrates the average monthly humidity levels in Delta, 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 Delta is approximately 51%, 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 Delta

In Delta in May, 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 Delta.

Maximum UV Index Levels in Delta for May

The chart shows the monthly maximum UV Index (UVI) for Delta 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 Delta typically reaches 11, which falls under the extreme exposure category.

Data source: Delta 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 Delta Compares to Other Months

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

This table compares monthly weather conditions in Delta, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	0°C (32°F)	24 mm (0.9 inches)	82%	moderate
February Weather	3°C (37°F)	28 mm (1.1 inches)	84%	high
March Weather	8°C (46°F)	40 mm (1.6 inches)	76%	very high
April Weather	12°C (54°F)	24 mm (0.9 inches)	67%	very high
May Weather	17°C (63°F)	24 mm (1.0 inches)	51%	extreme
June Weather	25°C (77°F)	4 mm (0.2 inches)	44%	extreme
July Weather	29°C (85°F)	6 mm (0.2 inches)	36%	extreme
August Weather	28°C (82°F)	7 mm (0.3 inches)	32%	extreme
September Weather	22°C (72°F)	9 mm (0.4 inches)	43%	very high
October Weather	11°C (53°F)	26 mm (1.0 inches)	63%	high
November Weather	6°C (44°F)	19 mm (0.8 inches)	80%	moderate
December Weather	0°C (32°F)	26 mm (1.0 inches)	83%	moderate