May Weather in Hartley, United States

Last updated: June 24, 2025

In May, the average temperature in Hartley, United States hovers around 15°C (59°F). However, be prepared for a range: the minimum can drop to 0°C (33°F) while the maximum may soar to 34°C (94°F). With an average precipitation of 136 mm (5.3 in) spread over 14 days, and humidity levels at a sticky 74%, it’s advisable to pack accordingly for a variety of weather conditions!

May Temperature in Hartley

In May in Hartley, the average temperature is 15°C (59°F). The maximum can reach 34°C (94°F), and the minimum can be as low as 0°C (33°F). It's advisable to pack layers to stay comfortable during your travels, as temperatures can vary significantly throughout the day.

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

The chart illustrates May temperature patterns in Hartley, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hartley, May typically has an average temperature of 15°C (59°F), with highs reaching up to 34°C (94°F) and lows dropping to around 0°C (33°F).

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

May Precipitation in Hartley

In Hartley in May, the total precipitation amount is 136 mm (5.3 in) spread over 14 days.

May Precipitation Trends in Hartley

The chart displays monthly precipitation patterns in Hartley, 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 Hartley, May typically receives around 136 mm (5.3 inches) of precipitation spread over approximately 14 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

May Humidity in Hartley

In Hartley in May, humidity is 74%. With an average temperature of 15°C (59°F), this humidity feels like traveling through a warm, sticky blanket that clings to your skin, making outdoor activities a bit uncomfortable and prompting you to seek out shaded areas or cool breezes.

May Average Humidity in Hartley

This chart illustrates the average monthly humidity levels in Hartley, 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 Hartley is approximately 74%, 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 Hartley

In Hartley 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 Hartley.

Maximum UV Index Levels in Hartley for May

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

Data source: Hartley 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 Hartley Compares to Other Months

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

This table compares monthly weather conditions in Hartley, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-7°C (20°F)	28 mm (1.1 inches)	80%	moderate
February Weather	-7°C (19°F)	34 mm (1.3 inches)	84%	moderate
March Weather	2°C (35°F)	69 mm (2.7 inches)	75%	moderate
April Weather	7°C (45°F)	101 mm (4.0 inches)	79%	very high
May Weather	15°C (59°F)	136 mm (5.3 inches)	74%	very high
June Weather	22°C (72°F)	126 mm (5.0 inches)	81%	extreme
July Weather	24°C (75°F)	73 mm (2.9 inches)	82%	very high
August Weather	22°C (71°F)	104 mm (4.1 inches)	80%	very high
September Weather	19°C (66°F)	109 mm (4.3 inches)	75%	very high
October Weather	9°C (49°F)	88 mm (3.5 inches)	77%	moderate
November Weather	2°C (35°F)	31 mm (1.2 inches)	85%	moderate
December Weather	-3°C (27°F)	39 mm (1.5 inches)	83%	moderate