May Weather in Smithfield, United States

Last updated: June 24, 2025

In May, the average temperature in Smithfield, United States hovers around 20°C (69°F). This month can bring a variety of weather, with minimum temperatures dipping as low as 4°C (39°F) and peaks reaching a sizzling 36°C (97°F). Expect about 122 mm (4.8 in) of precipitation spread over 10 days, contributing to the average humidity level of 80%.

May Temperature in Smithfield

In May in Smithfield, the average temperature is 20°C (69°F), with maximums reaching 36°C (97°F) and minimums dropping as low as 4°C (39°F). Be prepared for a wide temperature range and pack accordingly for your travels!

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

The chart illustrates May temperature patterns in Smithfield, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Smithfield, May typically has an average temperature of 20°C (69°F), with highs reaching up to 36°C (97°F) and lows dropping to around 4°C (39°F).

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

May Precipitation in Smithfield

In Smithfield in May, the total precipitation amount reaches 122 mm (4.8 in) over the course of 10 days.

May Precipitation Trends in Smithfield

The chart displays monthly precipitation patterns in Smithfield, 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 Smithfield, May typically receives around 122 mm (4.8 inches) of precipitation spread over approximately 10 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 Smithfield

In Smithfield in May, humidity is 80%. With an average temperature of 20°C (69°F), this humidity feels like a warm blanket enveloping you, making every step slightly more challenging as you navigate the air that clings to your skin, often leaving you longing for a cool breeze while exploring the sights.

May Average Humidity in Smithfield

This chart illustrates the average monthly humidity levels in Smithfield, 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 Smithfield is approximately 80%, 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 Smithfield

In Smithfield 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 Smithfield.

Maximum UV Index Levels in Smithfield for May

The chart shows the monthly maximum UV Index (UVI) for Smithfield 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 Smithfield typically reaches 10, which falls under the very high exposure category.

Data source: Smithfield 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 Smithfield Compares to Other Months

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

This table compares monthly weather conditions in Smithfield, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (42°F)	85 mm (3.3 inches)	84%	moderate
February Weather	8°C (47°F)	107 mm (4.2 inches)	83%	high
March Weather	10°C (51°F)	88 mm (3.5 inches)	82%	high
April Weather	16°C (61°F)	106 mm (4.2 inches)	81%	very high
May Weather	20°C (69°F)	122 mm (4.8 inches)	80%	very high
June Weather	24°C (76°F)	117 mm (4.6 inches)	82%	very high
July Weather	27°C (81°F)	135 mm (5.3 inches)	81%	extreme
August Weather	26°C (79°F)	169 mm (6.7 inches)	81%	very high
September Weather	23°C (74°F)	126 mm (4.9 inches)	78%	very high
October Weather	18°C (65°F)	89 mm (3.5 inches)	80%	very high
November Weather	11°C (52°F)	76 mm (3.0 inches)	84%	moderate
December Weather	8°C (46°F)	84 mm (3.3 inches)	84%	moderate