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May Weather in Johnston City, United States

Last updated: June 24, 2025

In Johnston City, United States, the average temperature in May hovers around 20°C (69°F). Expect a pleasant range, with minimums dropping to 4°C (39°F) and peaks reaching up to 33°C (92°F). During this month, precipitation totals 138 mm (5.4 in) over approximately 12 days, contributing to an average humidity level of 82%.

May Temperature in Johnston City

In May in Johnston City, the average temperature is 20°C (69°F). Maximums can reach 33°C (92°F), while minimums can drop to as low as 4°C (39°F). This variation in temperature makes it a perfect time for travelers to enjoy a mix of warm days and cooler nights, allowing for comfortable outdoor activities.

May Weather in Johnston City: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Johnston City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Johnston City, May typically has an average temperature of 20°C (69°F), with highs reaching up to 33°C (92°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec363949576977807773614641
Data source: Temperature data for Johnston City 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 Johnston City

In Johnston City in May, the precipitation amount is 138 mm (5.4 in) spread over a period of 12 days.

May Precipitation Trends in Johnston City

The chart displays monthly precipitation patterns in Johnston City, 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 Johnston City, May typically receives around 138 mm (5.4 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec981181411421381089381741149488
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Johnston City

In Johnston City in May humidity is 82%. With an average temperature of 20°C (69°F), this humidity feels like a warm, sticky embrace that clings to your skin, making it necessary to stay hydrated while exploring the sights.

May Average Humidity in Johnston City

This chart illustrates the average monthly humidity levels in Johnston City, 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 Johnston City is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%84%80%82%83%80%76%75%75%85%88%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Johnston City

In Johnston City 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 Johnston City.

Maximum UV Index Levels in Johnston City for May

The chart shows the monthly maximum UV Index (UVI) for Johnston City 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 Johnston City typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35710111110109753
Data source: Johnston City 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 Johnston City Compares to Other Months

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

This table compares monthly weather conditions in Johnston City, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)98 mm (3.9 inches)86%moderate
February Weather4°C (39°F)118 mm (4.7 inches)84%moderate
March Weather10°C (49°F)141 mm (5.6 inches)84%high
April Weather14°C (57°F)142 mm (5.6 inches)80%very high
May Weather20°C (69°F)138 mm (5.4 inches)82%extreme
June Weather25°C (77°F)108 mm (4.2 inches)83%extreme
July Weather27°C (81°F)92 mm (3.6 inches)79%very high
August Weather25°C (78°F)81 mm (3.2 inches)76%very high
September Weather23°C (74°F)74 mm (2.9 inches)75%very high
October Weather16°C (61°F)114 mm (4.5 inches)74%high
November Weather8°C (46°F)94 mm (3.7 inches)85%moderate
December Weather5°C (42°F)88 mm (3.4 inches)88%moderate

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