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May Weather in Westfield, United States

Last updated: June 24, 2025

In Westfield, United States, the average temperature in May hovers around 15°C (59°F), with a minimum dipping to -3°C (28°F) and a maximum reaching 34°C (94°F). Expect about 114 mm (4.5 in) of precipitation spread over 14 days, resulting in an average humidity of 78%. Stay prepared for the fluctuating weather during your visit!

May Temperature in Westfield

In May in Westfield, the average temperature is 15°C (59°F), with maximums reaching up to 34°C (94°F) and minimums dropping as low as -3°C (28°F). This diverse temperature range means travelers should prepare for warm days as well as cooler evenings and unexpected cold spells.

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

The chart illustrates May temperature patterns in Westfield, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Westfield, May typically has an average temperature of 15°C (59°F), with highs reaching up to 34°C (94°F) and lows dropping to around -3°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec192034445870747063503527
Data source: Temperature data for Westfield 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 Westfield

In Westfield in May, the total precipitation amount is 114 mm (4.5 in) over the course of 14 days.

May Precipitation Trends in Westfield

The chart displays monthly precipitation patterns in Westfield, 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 Westfield, May typically receives around 114 mm (4.5 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec42536396114111117116951024948
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Westfield

In Westfield in May, humidity is 78%. With an average temperature of 15°C (59°F), this humidity feels like a warm, enveloping blanket that clings to your skin, making outdoor activities a bit more tiring and requiring frequent breaks for hydration as you explore the area.

May Average Humidity in Westfield

This chart illustrates the average monthly humidity levels in Westfield, 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 Westfield is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%85%85%85%78%80%78%76%79%83%88%82%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Westfield

In Westfield in May, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Westfield.

Maximum UV Index Levels in Westfield for May

The chart shows the monthly maximum UV Index (UVI) for Westfield 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 Westfield typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24589101097532
Data source: Westfield 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 Westfield Compares to Other Months

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

This table compares monthly weather conditions in Westfield, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-7°C (20°F)42 mm (1.6 inches)85%low
February Weather-7°C (20°F)53 mm (2.1 inches)85%moderate
March Weather1°C (34°F)63 mm (2.5 inches)85%moderate
April Weather7°C (44°F)96 mm (3.8 inches)85%very high
May Weather15°C (59°F)114 mm (4.5 inches)78%very high
June Weather21°C (70°F)111 mm (4.4 inches)80%very high
July Weather23°C (74°F)117 mm (4.6 inches)78%very high
August Weather21°C (70°F)115 mm (4.5 inches)76%very high
September Weather17°C (64°F)95 mm (3.7 inches)79%high
October Weather10°C (50°F)102 mm (4.0 inches)83%moderate
November Weather2°C (35°F)49 mm (1.9 inches)88%moderate
December Weather-3°C (27°F)48 mm (1.9 inches)81%low

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