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May Weather in Riverton, New Zealand

Last updated: August 31, 2025

In May, the average temperature in Riverton, New Zealand is a crisp 9°C (49°F). Daily temperatures can swing from a chilly -2°C (29°F) to a pleasant 19°C (67°F). Expect some rain, with 101 mm (4.0 in) of precipitation falling over 15 days, and be prepared for a high average humidity of 85%!

May Temperature in Riverton

In May in Riverton, the average temperature is 9°C (49°F). Maximums can reach 19°C (67°F), while minimums can drop as low as -2°C (29°F). It's advisable to pack layers to stay comfortable while exploring the region.

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

The chart illustrates May temperature patterns in Riverton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Riverton, May typically has an average temperature of 9°C (49°F), with highs reaching up to 19°C (67°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec585856524944444648515457
Data source: Temperature data for Riverton 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 Riverton

In Riverton in May, the total precipitation amount is 101 mm (4.0 in) over the course of 15 days.

May Precipitation Trends in Riverton

The chart displays monthly precipitation patterns in Riverton, 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 Riverton, May typically receives around 101 mm (4.0 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec10612794991018510596131126123119
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Riverton

In Riverton in May humidity is 85%. With an average temperature of 9°C (49°F), this humidity feels like a damp chill that seeps into your bones, making every step outside a challenge as the moisture in the air weighs heavily and lingers, transforming even simple outings into a quest for comfort.

May Average Humidity in Riverton

This chart illustrates the average monthly humidity levels in Riverton, 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 Riverton is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%82%84%84%85%85%85%84%83%82%83%83%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Riverton

In Riverton 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 Riverton, you can check the information here.

Maximum UV Index Levels in Riverton for May

The chart shows the monthly maximum UV Index (UVI) for Riverton 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 Riverton typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec121185322358912
Data source: Riverton 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 Riverton Compares to Other Months

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

This table compares monthly weather conditions in Riverton, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather15°C (59°F)106 mm (4.2 inches)83%extreme
February Weather14°C (58°F)127 mm (5.0 inches)82%extreme
March Weather13°C (57°F)94 mm (3.7 inches)84%very high
April Weather11°C (53°F)99 mm (3.9 inches)84%moderate
May Weather9°C (49°F)101 mm (4.0 inches)85%moderate
June Weather7°C (45°F)85 mm (3.3 inches)85%low
July Weather7°C (44°F)105 mm (4.1 inches)85%low
August Weather8°C (46°F)96 mm (3.8 inches)84%moderate
September Weather9°C (48°F)131 mm (5.2 inches)83%moderate
October Weather10°C (51°F)126 mm (4.9 inches)82%very high
November Weather12°C (54°F)123 mm (4.9 inches)82%very high
December Weather14°C (57°F)119 mm (4.7 inches)83%extreme

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