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May Weather in Amherst, United States

Last updated: June 24, 2025

In Amherst, United States during May, the average temperature hovers around 21°C (70°F). However, be prepared for a temperature range that can dip to a brisk 1°C (35°F) and soar up to a sweltering 39°C (102°F). This month also sees an average precipitation of 49 mm (1.9 in) spread over 7 days, coupled with an average humidity level of 67%.

May Temperature in Amherst

In May in Amherst, the average temperature is 21°C (70°F). Maximums can reach 39°C (102°F), while minimums can dip as low as 1°C (35°F). Be prepared for a wide range of temperatures if you're traveling during this time.

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

The chart illustrates May temperature patterns in Amherst, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Amherst, May typically has an average temperature of 21°C (70°F), with highs reaching up to 39°C (102°F) and lows dropping to around 1°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec404354607078817973605043
Data source: Temperature data for Amherst 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 Amherst

In Amherst in May, the precipitation amount is 49 mm (1.9 in) over the course of 7 days.

May Precipitation Trends in Amherst

The chart displays monthly precipitation patterns in Amherst, 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 Amherst, May typically receives around 49 mm (1.9 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec161135224938313944631615
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Amherst

In Amherst in May humidity is 67%. With an average temperature of 21°C (70°F), this humidity feels like a warm embrace, making travel a bit stifling but still enjoyable if you're prepared with light clothing and plenty of water.

May Average Humidity in Amherst

This chart illustrates the average monthly humidity levels in Amherst, 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 Amherst is approximately 67%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%75%61%61%67%69%69%66%71%71%82%80%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Amherst

In Amherst 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 Amherst.

Maximum UV Index Levels in Amherst for May

The chart shows the monthly maximum UV Index (UVI) for Amherst 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 Amherst typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec579111112121210864
Data source: Amherst 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 Amherst Compares to Other Months

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

This table compares monthly weather conditions in Amherst, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)16 mm (0.6 inches)75%moderate
February Weather6°C (44°F)11 mm (0.4 inches)74%high
March Weather12°C (54°F)35 mm (1.4 inches)61%very high
April Weather16°C (60°F)22 mm (0.9 inches)61%extreme
May Weather21°C (70°F)49 mm (1.9 inches)67%extreme
June Weather26°C (78°F)38 mm (1.5 inches)69%extreme
July Weather27°C (81°F)31 mm (1.2 inches)69%extreme
August Weather26°C (79°F)39 mm (1.5 inches)66%extreme
September Weather23°C (73°F)44 mm (1.7 inches)71%very high
October Weather15°C (60°F)63 mm (2.5 inches)71%very high
November Weather10°C (50°F)16 mm (0.6 inches)82%high
December Weather6°C (44°F)15 mm (0.6 inches)80%moderate

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