May Weather in Jefferson, United States

Last updated: June 24, 2025

In May, the average temperature in Jefferson, United States hovers around 16°C (62°F). Daily temperatures can range from a chilly 1°C (35°F) to a sweltering 36°C (97°F). Expect about 163 mm (6.4 in) of precipitation spread over 15 days, contributing to an average humidity of 77%. Stay prepared for a mix of conditions!

May Temperature in Jefferson

In May in Jefferson, the average temperature is 16°C (62°F), with maximums reaching 36°C (97°F) and minimums dropping as low as 1°C (35°F). This wide temperature range makes it essential for travelers to pack both lightweight clothing for the warm days and warmer layers for the cooler nights.

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

The chart illustrates May temperature patterns in Jefferson, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Jefferson, May typically has an average temperature of 16°C (62°F), with highs reaching up to 36°C (97°F) and lows dropping to around 1°C (35°F).

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

May Precipitation in Jefferson

In Jefferson in May, the total precipitation amount is 163 mm (6.4 in) spread over 15 days.

May Precipitation Trends in Jefferson

The chart displays monthly precipitation patterns in Jefferson, 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 Jefferson, May typically receives around 163 mm (6.4 inches) of precipitation spread over approximately 15 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 Jefferson

In Jefferson in May, humidity is 77%. With an average temperature of 16°C (62°F), this humidity feels like a warm, enveloping blanket that can make outdoor activities feel heavy and draining, so travelers may want to plan for breaks in shaded areas and stay hydrated.

May Average Humidity in Jefferson

This chart illustrates the average monthly humidity levels in Jefferson, 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 Jefferson is approximately 77%, 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 Jefferson

In Jefferson in May, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Jefferson.

Maximum UV Index Levels in Jefferson for May

The chart shows the monthly maximum UV Index (UVI) for Jefferson 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 Jefferson typically reaches 9, which falls under the very high exposure category.

Data source: Jefferson 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 Jefferson Compares to Other Months

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

This table compares monthly weather conditions in Jefferson, 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 (22°F)	31 mm (1.2 inches)	78%	moderate
February Weather	-5°C (23°F)	39 mm (1.5 inches)	80%	moderate
March Weather	4°C (39°F)	76 mm (3.0 inches)	77%	moderate
April Weather	9°C (49°F)	64 mm (2.5 inches)	77%	very high
May Weather	16°C (62°F)	163 mm (6.4 inches)	77%	very high
June Weather	23°C (74°F)	104 mm (4.1 inches)	81%	extreme
July Weather	25°C (77°F)	76 mm (3.0 inches)	81%	very high
August Weather	23°C (73°F)	94 mm (3.7 inches)	77%	very high
September Weather	20°C (68°F)	100 mm (3.9 inches)	73%	very high
October Weather	11°C (52°F)	120 mm (4.7 inches)	75%	high
November Weather	3°C (38°F)	36 mm (1.4 inches)	85%	moderate
December Weather	-1°C (30°F)	37 mm (1.5 inches)	83%	moderate