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August Weather in Stephenville, Canada

Last updated: June 18, 2025

In Stephenville, Canada, the average temperature in August hovers around 18°C (65°F), with a comfortable range from a minimum of 9°C (49°F) to a pleasant maximum of 26°C (80°F). Prepare for 114 mm (4.5 in) of precipitation spread over 16 days, contributing to an average humidity level of 90%. Whether you're exploring the outdoors or seeking shelter, this month offers a unique blend of warm days and refreshing rains.

August Temperature in Stephenville

In August in Stephenville, the average temperature is 18°C (65°F). Maximum temperatures can reach 26°C (80°F), while minimums can dip as low as 9°C (49°F). This climate makes it an ideal time for travelers to enjoy outdoor activities comfortably.

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

The chart illustrates August temperature patterns in Stephenville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Stephenville, August typically has an average temperature of 18°C (65°F), with highs reaching up to 26°C (80°F) and lows dropping to around 9°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec242226354353626456473829
Data source: Temperature data for Stephenville 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 Stephenville

In Stephenville in August, the precipitation amount is 114 mm (4.5 in), occurring over a span of 16 days.

August Precipitation Trends in Stephenville

The chart displays monthly precipitation patterns in Stephenville, 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 Stephenville, August typically receives around 114 mm (4.5 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec10913112011211112389115144148172163
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Stephenville

In Stephenville in August, humidity is 90%. With an average temperature of 18°C (65°F), this humidity feels like walking through a dense fog, where the air clings to your skin and every step seems to sap your energy, making outdoor activities more challenging and less enjoyable for traveling.

August Average Humidity in Stephenville

This chart illustrates the average monthly humidity levels in Stephenville, 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 Stephenville is approximately 90%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%90%89%88%87%85%90%90%87%84%83%85%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Stephenville

In Stephenville in August, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Stephenville.

Maximum UV Index Levels in Stephenville for August

The chart shows the monthly maximum UV Index (UVI) for Stephenville 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 Stephenville typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235789886422
Data source: Stephenville 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 Stephenville Compares to Other Months

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

This table compares monthly weather conditions in Stephenville, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (24°F)109 mm (4.3 inches)88%low
February Weather-6°C (22°F)131 mm (5.2 inches)90%moderate
March Weather-3°C (27°F)120 mm (4.7 inches)89%moderate
April Weather2°C (36°F)112 mm (4.4 inches)88%high
May Weather6°C (43°F)111 mm (4.4 inches)87%very high
June Weather12°C (54°F)123 mm (4.8 inches)85%very high
July Weather16°C (62°F)89 mm (3.5 inches)90%very high
August Weather18°C (65°F)114 mm (4.5 inches)90%very high
September Weather13°C (57°F)144 mm (5.7 inches)87%high
October Weather8°C (47°F)148 mm (5.8 inches)84%moderate
November Weather3°C (38°F)172 mm (6.8 inches)83%low
December Weather-1°C (30°F)163 mm (6.4 inches)85%low

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