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August Weather in Johnston, United Kingdom

Last updated: August 27, 2025

In August, the average temperature in Johnston, United Kingdom hovers around 16°C (61°F), providing a pleasant backdrop for various activities. Expect a minimum of 10°C (51°F) and a maximum reaching 23°C (74°F). However, with an average precipitation of 101 mm (4.0 in) over 16 days, it's wise to carry an umbrella. The atmosphere can feel quite humid, with an average humidity level of 86%, adding to the region's unique climate experience.

August Temperature in Johnston

In August in Johnston, the average temperature is 16°C (61°F). The maximum can reach 23°C (74°F), and the minimum can be as low as 10°C (51°F). This mild climate makes Johnston a great destination for outdoor activities and sightseeing during this time of year.

August Weather in Johnston: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Johnston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Johnston, August typically has an average temperature of 16°C (61°F), with highs reaching up to 23°C (74°F) and lows dropping to around 10°C (51°F).
JanFebMarAprMayJunJulAugSepOctNovDec454546495358616159555048
Data source: Temperature data for Johnston 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.

August Precipitation in Johnston

In Johnston in August, the total precipitation amount is 101 mm (4.0 in) spread over 16 days.

August Precipitation Trends in Johnston

The chart displays monthly precipitation patterns in Johnston, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Johnston, August typically receives around 101 mm (4.0 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec80102935061826710197130131150
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Johnston

In Johnston in August, humidity is 86%. With an average temperature of 16°C (61°F), this humidity feels like walking through a warm, thick blanket of air that clings to your skin, making outdoor activities feel sticky and uncomfortable for traveling.

August Average Humidity in Johnston

This chart illustrates the average monthly humidity levels in Johnston, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Johnston is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%84%83%84%85%86%87%86%85%85%82%80%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Johnston

In Johnston in August, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Johnston.

Maximum UV Index Levels in Johnston for August

The chart shows the monthly maximum UV Index (UVI) for Johnston in August, 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 August, the maximum UV index in Johnston typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124678876421
Data source: Johnston August 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 August Weather in Johnston Compares to Other Months

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

This table compares monthly weather conditions in Johnston, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (46°F)80 mm (3.2 inches)81%low
February Weather7°C (46°F)102 mm (4.0 inches)84%low
March Weather8°C (46°F)93 mm (3.7 inches)83%moderate
April Weather9°C (49°F)50 mm (2.0 inches)84%high
May Weather12°C (53°F)61 mm (2.4 inches)85%high
June Weather14°C (58°F)82 mm (3.2 inches)86%very high
July Weather16°C (61°F)67 mm (2.6 inches)87%very high
August Weather16°C (61°F)101 mm (4.0 inches)86%high
September Weather15°C (59°F)97 mm (3.8 inches)85%high
October Weather13°C (55°F)130 mm (5.1 inches)85%moderate
November Weather10°C (50°F)131 mm (5.2 inches)82%low
December Weather9°C (48°F)150 mm (5.9 inches)80%low

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