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May Weather in Wellington, United States

Last updated: June 24, 2025

In May, the average temperature in Wellington, United States hovers around 12°C (54°F). Expect a range of conditions, with minimums plummeting to -3°C (26°F) and maximums soaring to 30°C (86°F). Rainfall can be expected, with about 116 mm (4.6 in) spread over 14 days, contributing to an average humidity of 67%.

May Temperature in Wellington

In May in Wellington, the average temperature is 12°C (54°F), with maximums reaching up to 30°C (86°F) and minimums dropping as low as -3°C (26°F). This makes it essential for travelers to pack layers to stay comfortable in both warm days and chilly nights.

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

The chart illustrates May temperature patterns in Wellington, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Wellington, May typically has an average temperature of 12°C (54°F), with highs reaching up to 30°C (86°F) and lows dropping to around -3°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec302838455466727064473933
Data source: Temperature data for Wellington 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 Wellington

In Wellington in May, the total precipitation amount is 116 mm (4.6 in) spread over a duration of 14 days.

May Precipitation Trends in Wellington

The chart displays monthly precipitation patterns in Wellington, 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 Wellington, May typically receives around 116 mm (4.6 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec1624535411646353726362418
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Wellington

In Wellington in May, humidity is 67%. With an average temperature of 12°C (54°F), this humidity feels like a cool, damp blanket wrapping around you, making it essential to layer your clothing for comfort while exploring.

May Average Humidity in Wellington

This chart illustrates the average monthly humidity levels in Wellington, 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 Wellington is approximately 67%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%86%75%67%67%68%62%63%63%72%80%85%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Wellington

In Wellington in May, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Wellington.

Maximum UV Index Levels in Wellington for May

The chart shows the monthly maximum UV Index (UVI) for Wellington 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 Wellington typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810111212119654
Data source: Wellington 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 Wellington Compares to Other Months

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

This table compares monthly weather conditions in Wellington, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)16 mm (0.6 inches)84%moderate
February Weather-2°C (28°F)24 mm (0.9 inches)85%high
March Weather4°C (39°F)53 mm (2.1 inches)75%very high
April Weather7°C (45°F)54 mm (2.1 inches)67%very high
May Weather12°C (54°F)116 mm (4.6 inches)67%extreme
June Weather19°C (67°F)46 mm (1.8 inches)68%extreme
July Weather22°C (73°F)35 mm (1.4 inches)62%extreme
August Weather21°C (71°F)37 mm (1.5 inches)63%extreme
September Weather18°C (64°F)26 mm (1.0 inches)63%very high
October Weather8°C (47°F)36 mm (1.4 inches)72%high
November Weather4°C (40°F)24 mm (0.9 inches)79%moderate
December Weather0°C (33°F)18 mm (0.7 inches)85%moderate

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