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May Weather in Johnson, United States

Last updated: June 24, 2025

In May, the average temperature in Johnson, United States hovers around 13°C (55°F). Expect a minimum chill of -2°C (29°F) and the potential for a warm peak at 34°C (94°F). With an average humidity of 80%, it's a month where the air feels quite moist. Be prepared for 109 mm (4.3 in) of precipitation spread over about 13 days, so grabbing an umbrella might be a wise choice!

May Temperature in Johnson

In May in Johnson, the average temperature is 13°C (55°F). The maximum can reach 34°C (94°F), while the minimum can drop as low as -2°C (29°F). Travelers should be prepared for a wide range of temperatures, making layering essential for comfort during their visit.

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 13°C (55°F), with highs reaching up to 34°C (94°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec182028415563696759483323
Data source: Temperature data for Johnson generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Johnson

In Johnson in May, the precipitation amount is 109 mm (4.3 in), which occurs during 13 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 109 mm (4.3 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec9792921241091161411158716513193
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Johnson

In Johnson in May humidity is 80%. With an average temperature of 13°C (55°F), this humidity feels like a damp blanket wrapping around you, making any outdoor activity feel stifling and heavy, which can lead to fatigue for travelers unaccustomed to such moist conditions.

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 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%92%86%85%80%74%76%75%78%86%89%89%
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 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 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 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457910997532
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.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (18°F)96 mm (3.8 inches)93%low
February Weather-6°C (21°F)92 mm (3.6 inches)92%moderate
March Weather-2°C (28°F)92 mm (3.6 inches)86%moderate
April Weather5°C (42°F)124 mm (4.9 inches)85%high
May Weather13°C (55°F)109 mm (4.3 inches)80%very high
June Weather17°C (64°F)116 mm (4.6 inches)74%very high
July Weather20°C (69°F)141 mm (5.6 inches)76%very high
August Weather19°C (67°F)115 mm (4.5 inches)75%very high
September Weather15°C (59°F)87 mm (3.4 inches)78%high
October Weather9°C (48°F)165 mm (6.5 inches)86%moderate
November Weather0°C (33°F)131 mm (5.2 inches)88%moderate
December Weather-5°C (23°F)92 mm (3.6 inches)89%low

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