May Weather in Johnston

Last updated: March 2, 2024

The weather in Johnston, United Kingdom, during May is characterized by an average temperature of 12°C (53°F). Highs can soar to 19°C (66°F), while lows may dip to 5°C (42°F). Typically, the humidity level in Johnston throughout May hovers around 85%.

5°C (42°F)

Minimum temperature

12°C (53°F)

Average temperature

19°C (66°F)

Maximum temperature

85%

Humidity

Precipitation and Sunshine hours

In May, Johnston averages 61 mm (2.4 inches) of rainfall, typically over the course of 9 rainy days. The month enjoys an average of 15 hours 40 minutes of daylight, with the sun shining for approximately 13 hours 25 minutes each day. Additionally, there is a 37% probability of sunny days during this period.

61 mm (2.4 inches)

Precipitation

9 rainy days

Rainy days

13 hours 25 minutes

Sunshine hours

37%

Chance of sun

UV Index

In May, the UV Index in Johnston reaches a maximum of 7, indicating a level of High exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, during which unprotected skin may burn in as little as 25 minutes.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
  07:00 08:00 09:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00
UVI 1 2 3 4 6 7 7 7 6 5 3 2 1
Exposure Low Moderate High Moderate Low
Time to burn 45 min 30 min 25 min 30 min 45 min

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