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May Weather in Caldwell, United States

Last updated: June 24, 2025

In May, the average temperature in Caldwell, United States is a pleasant 18°C (64°F). However, be prepared for a range of temperatures; it can dip to a chilly -2°C (29°F) at its lowest and soar to a warm 31°C (89°F) at its highest. With 147 mm (5.8 in) of precipitation over 17 days, you'll want to keep your umbrella handy. The atmosphere is also quite humid, with an average humidity level of 82%.

May Temperature in Caldwell

In May in Caldwell, the average temperature is 18°C (64°F). Maximums can reach 31°C (89°F), and minimums can be as low as -2°C (29°F). This variation in temperature makes Caldwell a destination for travelers looking to experience both warm and cooler weather in the same month.

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

The chart illustrates May temperature patterns in Caldwell, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Caldwell, May typically has an average temperature of 18°C (64°F), with highs reaching up to 31°C (89°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec323643536471757369584337
Data source: Temperature data for Caldwell 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 Caldwell

In Caldwell in May, the precipitation amount is 147 mm (5.8 in) over a span of 17 days.

May Precipitation Trends in Caldwell

The chart displays monthly precipitation patterns in Caldwell, 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 Caldwell, May typically receives around 147 mm (5.8 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec9212312214314716912610610911390116
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Caldwell

In Caldwell in May humidity is 82%. With an average temperature of 18°C (64°F), this humidity feels like a warm, muggy embrace that can make exploring the area feel stifling, leaving travelers drenched in sweat and longing for respite in the shade.

May Average Humidity in Caldwell

This chart illustrates the average monthly humidity levels in Caldwell, 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 Caldwell is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%88%87%82%84%82%73%74%81%89%86%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Caldwell

In Caldwell in May, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Caldwell.

Maximum UV Index Levels in Caldwell for May

The chart shows the monthly maximum UV Index (UVI) for Caldwell 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 Caldwell typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098643
Data source: Caldwell 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 Caldwell Compares to Other Months

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

This table compares monthly weather conditions in Caldwell, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)91 mm (3.6 inches)88%moderate
February Weather2°C (37°F)123 mm (4.8 inches)88%moderate
March Weather6°C (44°F)122 mm (4.8 inches)88%high
April Weather12°C (53°F)143 mm (5.6 inches)86%very high
May Weather18°C (64°F)147 mm (5.8 inches)82%very high
June Weather22°C (71°F)169 mm (6.7 inches)84%very high
July Weather24°C (76°F)126 mm (4.9 inches)82%very high
August Weather23°C (74°F)106 mm (4.2 inches)73%very high
September Weather20°C (69°F)109 mm (4.3 inches)73%very high
October Weather15°C (58°F)113 mm (4.5 inches)81%high
November Weather6°C (43°F)90 mm (3.6 inches)89%moderate
December Weather3°C (38°F)116 mm (4.6 inches)86%moderate

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