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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 21°C (71°F). However, be prepared for a range, as temperatures can dip to a chilly 3°C (37°F) or soar up to a sweltering 39°C (103°F). Expect approximately 92 mm (3.6 in) of precipitation spread over 10 days, and remember, the air will feel quite humid with an average humidity level of 78%.

May Temperature in Wellington

In May, in Wellington, the average temperature is 21°C (71°F). Maximum temperatures can reach 39°C (103°F), while minimum temperatures can drop as low as 3°C (37°F). This wide range makes it essential for travelers to pack for both hot days and cooler evenings.

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 21°C (71°F), with highs reaching up to 39°C (103°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec404154617079838275615144
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 92 mm (3.6 in), which falls over the course of 10 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 92 mm (3.6 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec271870429388313574701622
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 78%. With an average temperature of 21°C (71°F), this humidity feels like a warm blanket wrapped around you, making travel a bit more challenging as it can lead to a sticky, heavy sensation, dampening the enjoyment of outdoor activities.

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 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%76%64%70%78%81%82%78%72%73%81%81%
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.
JanFebMarAprMayJunJulAugSepOctNovDec468101112121110754
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 Weather5°C (40°F)27 mm (1.1 inches)75%moderate
February Weather5°C (42°F)18 mm (0.7 inches)76%high
March Weather12°C (54°F)70 mm (2.7 inches)64%very high
April Weather16°C (61°F)42 mm (1.6 inches)70%very high
May Weather21°C (71°F)92 mm (3.6 inches)78%extreme
June Weather26°C (80°F)88 mm (3.5 inches)81%extreme
July Weather28°C (83°F)31 mm (1.2 inches)82%extreme
August Weather28°C (82°F)35 mm (1.4 inches)78%extreme
September Weather24°C (75°F)74 mm (2.9 inches)72%very high
October Weather16°C (62°F)70 mm (2.8 inches)73%high
November Weather10°C (51°F)16 mm (0.6 inches)80%moderate
December Weather7°C (44°F)22 mm (0.9 inches)81%moderate

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