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May Weather in Dumfries, United States

Last updated: June 24, 2025

In May, the average temperature in Dumfries, United States hovers around 20°C (67°F), offering a pleasant climate for outdoor activities. However, temperatures can swing from a brisk 3°C (38°F) to a scorching 35°C (95°F), so dress accordingly! Expect approximately 117 mm (4.6 in) of rainfall spread over 12 days, contributing to an average humidity of 78%. Prepare for a month of varied weather experiences!

May Temperature in Dumfries

In May in Dumfries, the average temperature is 20°C (67°F). Maximums can reach 35°C (95°F), and minimums can be as low as 3°C (38°F). Pack accordingly to enjoy a range of weather conditions while traveling!

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

The chart illustrates May temperature patterns in Dumfries, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Dumfries, May typically has an average temperature of 20°C (67°F), with highs reaching up to 35°C (95°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec384248586776817873634842
Data source: Temperature data for Dumfries 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 Dumfries

In Dumfries in May, the total precipitation amount is 117 mm (4.6 in), occurring over a span of 12 days.

May Precipitation Trends in Dumfries

The chart displays monthly precipitation patterns in Dumfries, 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 Dumfries, May typically receives around 117 mm (4.6 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec629379101117108108153931097889
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Dumfries

In Dumfries in May humidity is 78%. With an average temperature of 20°C (67°F), this humidity feels like walking through a warm, thick blanket, making travel a bit sticky and requiring frequent breaks to find shade and cool refreshments.

May Average Humidity in Dumfries

This chart illustrates the average monthly humidity levels in Dumfries, 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 Dumfries is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%83%81%78%79%74%72%75%81%85%84%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Dumfries

In Dumfries 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 Dumfries.

Maximum UV Index Levels in Dumfries for May

The chart shows the monthly maximum UV Index (UVI) for Dumfries 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 Dumfries typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098753
Data source: Dumfries 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 Dumfries Compares to Other Months

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

This table compares monthly weather conditions in Dumfries, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (38°F)61 mm (2.4 inches)84%moderate
February Weather6°C (43°F)93 mm (3.6 inches)83%moderate
March Weather9°C (48°F)79 mm (3.1 inches)83%high
April Weather14°C (58°F)101 mm (4.0 inches)81%very high
May Weather20°C (67°F)117 mm (4.6 inches)78%very high
June Weather24°C (76°F)108 mm (4.3 inches)79%very high
July Weather27°C (81°F)108 mm (4.2 inches)74%very high
August Weather26°C (78°F)153 mm (6.0 inches)72%very high
September Weather23°C (73°F)93 mm (3.6 inches)75%very high
October Weather17°C (63°F)109 mm (4.3 inches)81%high
November Weather9°C (49°F)78 mm (3.1 inches)85%moderate
December Weather6°C (42°F)89 mm (3.5 inches)84%moderate

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