May Weather in Delta, United States

Last updated: June 24, 2025

In May, the average temperature in Delta, United States hovers around 18°C (64°F), with a minimum dipping to 1°C (35°F) and a maximum soaring to 34°C (93°F). Expect about 140 mm (5.5 in) of precipitation spread over 14 days, contributing to an average humidity of 78%. Stay prepared for a diverse climate that beautifully blends warmth and occasional rain!

May Temperature in Delta

In May in Delta, the average temperature is 18°C (64°F). Maximum temperatures can reach 34°C (93°F), while minimums can drop as low as 1°C (35°F). Be prepared for a wide range of temperatures to make the most of your travels!

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 18°C (64°F), with highs reaching up to 34°C (93°F) and lows dropping to around 1°C (35°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 140 mm (5.5 in) over the course of 14 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 140 mm (5.5 inches) of precipitation spread over approximately 14 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 78%. With an average temperature of 18°C (64°F), this humidity feels like a warm, thick blanket wrapping around you, making traveling feel a bit sticky and sluggish, yet the coolness of the air tempers the intensity, inviting you to explore at a leisurely pace.

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 78%, 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 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, 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 10, which falls under the very high 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	2°C (35°F)	61 mm (2.4 inches)	84%	moderate
February Weather	3°C (38°F)	97 mm (3.8 inches)	83%	moderate
March Weather	6°C (44°F)	100 mm (3.9 inches)	83%	high
April Weather	12°C (54°F)	100 mm (3.9 inches)	81%	very high
May Weather	18°C (64°F)	140 mm (5.5 inches)	78%	very high
June Weather	23°C (73°F)	108 mm (4.3 inches)	79%	very high
July Weather	26°C (79°F)	150 mm (5.9 inches)	74%	very high
August Weather	24°C (76°F)	144 mm (5.7 inches)	72%	very high
September Weather	21°C (70°F)	111 mm (4.4 inches)	75%	very high
October Weather	16°C (60°F)	101 mm (4.0 inches)	81%	high
November Weather	7°C (46°F)	88 mm (3.5 inches)	85%	moderate
December Weather	4°C (39°F)	98 mm (3.9 inches)	84%	moderate