May Weather in Johnson, United States

Last updated: June 24, 2025

In Johnson, United States, the average temperature in May is a comfortable 18°C (65°F). However, be prepared for a range of conditions, as temperatures can dip to a chilly -3°C (27°F) or soar to a scorching 37°C (99°F). This month typically sees about 84 mm (3.3 in) of precipitation over 10 days, contributing to an average humidity of 81%. Enjoy the diverse climate while planning your activities!

May Temperature in Johnson

In May in Johnson, the average temperature is 18°C (65°F), with maximums reaching up to 37°C (99°F) and minimums dropping as low as -3°C (27°F). Travelers should be prepared for a wide range of temperatures, making it essential to pack accordingly for both warm and cool conditions.

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

The chart illustrates May temperature patterns in Johnson, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Johnson, May typically has an average temperature of 18°C (65°F), with highs reaching up to 37°C (99°F) and lows dropping to around -3°C (27°F).

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

May Precipitation in Johnson

In Johnson in May, the precipitation amount is 84 mm (3.3 in) over a span of 10 days.

May Precipitation Trends in Johnson

The chart displays monthly precipitation patterns in Johnson, 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 Johnson, May typically receives around 84 mm (3.3 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 Johnson

In Johnson in May, humidity is 81%. With an average temperature of 18°C (65°F), this humidity feels like a thick blanket wrapping around you, making every step feel heavier and the air thick and sultry—a challenging environment for traveling.

May Average Humidity in Johnson

This chart illustrates the average monthly humidity levels in Johnson, 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 Johnson is approximately 81%, 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 Johnson

In Johnson 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 Johnson.

Maximum UV Index Levels in Johnson for May

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

Data source: Johnson 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 Johnson Compares to Other Months

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

This table compares monthly weather conditions in Johnson, 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)	15 mm (0.6 inches)	74%	moderate
February Weather	2°C (36°F)	13 mm (0.5 inches)	77%	moderate
March Weather	9°C (48°F)	38 mm (1.5 inches)	65%	very high
April Weather	13°C (55°F)	44 mm (1.7 inches)	67%	very high
May Weather	18°C (65°F)	84 mm (3.3 inches)	81%	extreme
June Weather	25°C (77°F)	38 mm (1.5 inches)	82%	extreme
July Weather	27°C (81°F)	38 mm (1.5 inches)	82%	extreme
August Weather	25°C (78°F)	60 mm (2.4 inches)	84%	extreme
September Weather	22°C (73°F)	34 mm (1.3 inches)	79%	very high
October Weather	14°C (57°F)	29 mm (1.1 inches)	75%	high
November Weather	8°C (47°F)	8 mm (0.3 inches)	79%	moderate
December Weather	3°C (38°F)	19 mm (0.8 inches)	83%	moderate