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May Weather in Stephenville, Canada

Last updated: June 18, 2025

In May, the average temperature in Stephenville, Canada hovers around 6°C (43°F), with minimums dipping to -3°C (28°F) and maximums reaching 18°C (64°F). Be prepared for some rain, as 111 mm (4.4 in) of precipitation is expected over 15 days, contributing to an average humidity of 87%.

May Temperature in Stephenville

In May in Stephenville, the average temperature is 6°C (43°F). The maximum can reach 18°C (64°F), while the minimum can drop as low as -3°C (28°F). Travelers should be prepared for a wide range of temperatures and dress in layers to stay comfortable.

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

The chart illustrates May 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, May typically has an average temperature of 6°C (43°F), with highs reaching up to 18°C (64°F) and lows dropping to around -3°C (28°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.

May Precipitation in Stephenville

In Stephenville in May, the total precipitation amount is 111 mm (4.4 in) spread over 15 days.

May Precipitation Trends in Stephenville

The chart displays monthly precipitation patterns in Stephenville, 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 Stephenville, May typically receives around 111 mm (4.4 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec10913112011211112389115144148172163
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Stephenville

In Stephenville in May, humidity is 87%. With an average temperature of 6°C (43°F), this humidity feels like a damp chill that clings to your skin, making outdoor activities uncomfortable and necessitating warm, breathable layers for traveling.

May Average Humidity in Stephenville

This chart illustrates the average monthly humidity levels in Stephenville, 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 Stephenville is approximately 87%, 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 May generated using information from the Copernicus Climate Change Service.

May UV Index in Stephenville

In Stephenville in May, 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 May

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

Weather in Stephenville varies notably across the year, with each month offering distinct climate conditions. This page compares May’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 May’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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