May Weather in Portobello, New Zealand

Last updated: August 31, 2025

In May, the average temperature in Portobello, New Zealand hovers around 9°C (49°F), with a minimum of 1°C (34°F) and a maximum of 18°C (64°F). Throughout the month, expect about 50 mm (2.0 in) of precipitation over 10 days, contributing to an average humidity of 84%. Whether you're exploring the outdoors or seeking cozy indoor activities, be prepared for a mix of cool temperatures and occasional rain!

May Temperature in Portobello

In May in Portobello, the average temperature is 9°C (49°F), with maximums reaching 18°C (64°F) and minimums dipping as low as 1°C (34°F). Be sure to pack layers to stay comfortable during your travels!

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

The chart illustrates May temperature patterns in Portobello, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Portobello, May typically has an average temperature of 9°C (49°F), with highs reaching up to 18°C (64°F) and lows dropping to around 1°C (34°F).

Data source: Temperature data for Portobello generated using information from the Copernicus Climate Change Service.

May Precipitation in Portobello

In Portobello in May, the precipitation amount is 50 mm (2.0 in) over a span of 10 days.

May Precipitation Trends in Portobello

The chart displays monthly precipitation patterns in Portobello, 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 Portobello, May typically receives around 50 mm (2.0 inches) of precipitation spread over approximately 10 days.

Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

May Humidity in Portobello

In Portobello in May, humidity is 84%. With an average temperature of 9°C (49°F), this humidity feels like a chilly embrace, making travel uncomfortable as the dampness seeps into your clothes and lingers in the air, leaving you feeling cool yet clammy.

May Average Humidity in Portobello

This chart illustrates the average monthly humidity levels in Portobello, 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 Portobello is approximately 84%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Portobello

In Portobello in May, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Portobello, you can check the information here.

Maximum UV Index Levels in Portobello for May

The chart shows the monthly maximum UV Index (UVI) for Portobello 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 Portobello typically reaches 3, which falls under the moderate exposure category.

Data source: Portobello 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 Portobello Compares to Other Months

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

This table compares monthly weather conditions in Portobello, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	15°C (59°F)	90 mm (3.5 inches)	79%	extreme
February Weather	15°C (59°F)	91 mm (3.6 inches)	76%	extreme
March Weather	14°C (57°F)	48 mm (1.9 inches)	78%	very high
April Weather	12°C (53°F)	73 mm (2.9 inches)	81%	moderate
May Weather	9°C (49°F)	50 mm (2.0 inches)	84%	moderate
June Weather	7°C (45°F)	43 mm (1.7 inches)	85%	low
July Weather	7°C (44°F)	68 mm (2.7 inches)	85%	low
August Weather	8°C (46°F)	41 mm (1.6 inches)	84%	moderate
September Weather	9°C (48°F)	56 mm (2.2 inches)	83%	moderate
October Weather	10°C (51°F)	76 mm (3.0 inches)	80%	very high
November Weather	12°C (55°F)	84 mm (3.3 inches)	78%	very high
December Weather	14°C (57°F)	88 mm (3.5 inches)	81%	extreme