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May Weather in Lowell, United States

Last updated: June 24, 2025

In May, the average temperature in Lowell, United States hovers around 15°C (60°F). While you may enjoy mild days, be prepared for a wide temperature range, with minimums dipping to -3°C (28°F) and maximums soaring to 35°C (94°F). Rain is also a possibility, with 134 mm (5.3 in) expected over 14 days, contributing to an average humidity of 82%.

May Temperature in Lowell

In May in Lowell, the average temperature is 15°C (60°F), with maximums reaching 35°C (94°F) and minimums dropping to as low as -3°C (28°F). This range means that travelers should be prepared for both warm days and chilly nights.

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

The chart illustrates May temperature patterns in Lowell, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lowell, May typically has an average temperature of 15°C (60°F), with highs reaching up to 35°C (94°F) and lows dropping to around -3°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec252636465970757265533832
Data source: Temperature data for Lowell 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 Lowell

In Lowell in May, the total precipitation amount is 134 mm (5.3 in) over the course of 14 days.

May Precipitation Trends in Lowell

The chart displays monthly precipitation patterns in Lowell, 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 Lowell, May typically receives around 134 mm (5.3 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec6568658613412068691131306266
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Lowell

In Lowell in May humidity is 82%. With an average temperature of 15°C (60°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities feel sticky and draining, which can hinder your travel experience.

May Average Humidity in Lowell

This chart illustrates the average monthly humidity levels in Lowell, 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 Lowell is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%86%87%82%81%78%79%80%82%87%86%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Lowell

In Lowell 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 Lowell.

Maximum UV Index Levels in Lowell for May

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

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

This table compares monthly weather conditions in Lowell, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (26°F)64 mm (2.5 inches)87%low
February Weather-3°C (27°F)68 mm (2.7 inches)87%moderate
March Weather2°C (37°F)65 mm (2.6 inches)86%moderate
April Weather8°C (46°F)86 mm (3.4 inches)87%very high
May Weather15°C (60°F)134 mm (5.3 inches)82%very high
June Weather21°C (70°F)120 mm (4.7 inches)81%very high
July Weather24°C (75°F)68 mm (2.7 inches)78%very high
August Weather22°C (72°F)69 mm (2.7 inches)79%very high
September Weather18°C (65°F)113 mm (4.5 inches)79%high
October Weather11°C (53°F)130 mm (5.1 inches)82%moderate
November Weather3°C (38°F)62 mm (2.4 inches)87%moderate
December Weather0°C (32°F)65 mm (2.6 inches)86%low

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