May Weather in Harlan, United States

Last updated: June 24, 2025

In Harlan, United States, the average temperature in May hovers around 18°C (65°F). Expect a range where the mercury can dip to a chilly 0°C (32°F) and soar up to a warm 30°C (87°F). This month witnesses 145 mm (5.7 in) of precipitation spread across about 14 days, while the air carries an average humidity of 84%. Prepare for a mix of weather as you explore!

May Temperature in Harlan

In May in Harlan, the average temperature is 18°C (65°F). The maximum can reach 30°C (87°F), while the minimum can drop as low as 0°C (32°F). It's a great time to visit for a mix of warm days and cool nights, perfect for exploring the sights and enjoying outdoor activities.

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

The chart illustrates May temperature patterns in Harlan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Harlan, May typically has an average temperature of 18°C (65°F), with highs reaching up to 30°C (87°F) and lows dropping to around 0°C (32°F).

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

May Precipitation in Harlan

In Harlan in May, the total precipitation amount is 145 mm (5.7 in) over a span of 14 days.

May Precipitation Trends in Harlan

The chart displays monthly precipitation patterns in Harlan, 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 Harlan, May typically receives around 145 mm (5.7 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 Harlan

In Harlan in May, humidity is 84%. With an average temperature of 18°C (65°F), this humidity feels like a thick blanket enveloping you, making travel feel heavy and slightly uncomfortable as the air clings to your skin and limits your breath.

May Average Humidity in Harlan

This chart illustrates the average monthly humidity levels in Harlan, 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 Harlan is approximately 84%, 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 Harlan

In Harlan 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 Harlan.

Maximum UV Index Levels in Harlan for May

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

Data source: Harlan 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 Harlan Compares to Other Months

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

This table compares monthly weather conditions in Harlan, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	3°C (37°F)	97 mm (3.8 inches)	88%	moderate
February Weather	6°C (43°F)	193 mm (7.6 inches)	88%	high
March Weather	9°C (48°F)	145 mm (5.7 inches)	87%	very high
April Weather	13°C (56°F)	163 mm (6.4 inches)	84%	very high
May Weather	18°C (65°F)	145 mm (5.7 inches)	84%	extreme
June Weather	21°C (71°F)	132 mm (5.2 inches)	83%	extreme
July Weather	24°C (75°F)	121 mm (4.8 inches)	79%	extreme
August Weather	23°C (73°F)	138 mm (5.4 inches)	66%	very high
September Weather	21°C (69°F)	104 mm (4.1 inches)	67%	very high
October Weather	15°C (60°F)	139 mm (5.5 inches)	76%	high
November Weather	7°C (45°F)	81 mm (3.2 inches)	89%	moderate
December Weather	5°C (41°F)	136 mm (5.3 inches)	88%	moderate