nomadseason

May Weather in Portland West, Australia

Last updated: August 22, 2025

In Portland West, Australia, the average temperature in May hovers around 13°C (56°F). You can expect temperatures to range from a cool 6°C (44°F) to a pleasant 21°C (70°F). With 92 mm (3.6 in) of precipitation spread over 16 days, be prepared for occasional showers. The air is generally humid, with an average humidity level of 79%, adding to the rich atmosphere of the season.

May Temperature in Portland West

In May in Portland West, the average temperature is 13°C (56°F), with maximums reaching 21°C (70°F) and minimums dropping as low as 6°C (44°F). It's a great time to enjoy mild weather and explore the local sights comfortably.

May Weather in Portland West: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Portland West, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Portland West, May typically has an average temperature of 13°C (56°F), with highs reaching up to 21°C (70°F) and lows dropping to around 6°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec646363595653525253555861
Data source: Temperature data for Portland West generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Portland West

In Portland West in May, the total precipitation amount reaches 92 mm (3.6 in) spread over 16 days.

May Precipitation Trends in Portland West

The chart displays monthly precipitation patterns in Portland West, 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 Portland West, May typically receives around 92 mm (3.6 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec32313652928112211386756844
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

May Humidity in Portland West

In Portland West in May, humidity is 79%. With an average temperature of 13°C (56°F), this humidity feels like a damp, cool blanket wrapping around you, making traveling slightly uncomfortable and requiring you to dress in layers to stay comfortable while exploring.

May Average Humidity in Portland West

This chart illustrates the average monthly humidity levels in Portland West, 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 Portland West is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%75%76%76%79%78%78%77%77%76%76%76%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Portland West

In Portland West in May, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Portland West for better planning.

Maximum UV Index Levels in Portland West for May

The chart shows the monthly maximum UV Index (UVI) for Portland West 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 Portland West typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec13121074334791114
Data source: Portland West 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 Portland West Compares to Other Months

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

This table compares monthly weather conditions in Portland West, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather18°C (64°F)32 mm (1.3 inches)76%extreme
February Weather17°C (63°F)31 mm (1.2 inches)75%extreme
March Weather17°C (63°F)35 mm (1.4 inches)76%very high
April Weather15°C (60°F)51 mm (2.0 inches)76%high
May Weather13°C (56°F)92 mm (3.6 inches)79%moderate
June Weather11°C (53°F)81 mm (3.2 inches)78%moderate
July Weather11°C (52°F)122 mm (4.8 inches)78%moderate
August Weather11°C (52°F)113 mm (4.4 inches)77%moderate
September Weather12°C (54°F)86 mm (3.4 inches)76%high
October Weather13°C (56°F)74 mm (2.9 inches)76%very high
November Weather15°C (59°F)68 mm (2.7 inches)76%extreme
December Weather16°C (61°F)44 mm (1.7 inches)76%extreme

Compare Portland West's Climate with Cities Worldwide