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May Weather in Round Lake, United States

Last updated: June 24, 2025

In May, the average temperature in Round Lake, United States is a pleasant 15°C (59°F). However, be prepared for a range of temperatures, with a minimum dipping down to 0°C (32°F) and a maximum soaring to 33°C (93°F). Expect 103 mm (4.0 in) of precipitation over approximately 13 days, and don’t forget — the air will feel quite humid, with an average humidity of 76%.

May Temperature in Round Lake

In May in Round Lake, the average temperature is 15°C (59°F). Maximums can reach 33°C (93°F) and minimums can be as low as 0°C (32°F). This makes Round Lake a fantastic destination for travelers looking to enjoy a diverse range of weather experiences.

May Weather in Round Lake: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Round Lake, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Round Lake, May typically has an average temperature of 15°C (59°F), with highs reaching up to 33°C (93°F) and lows dropping to around 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec252834465867737164533830
Data source: Temperature data for Round Lake 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 Round Lake

In Round Lake in May, the precipitation amount is 103 mm (4.0 in) over a span of 13 days.

May Precipitation Trends in Round Lake

The chart displays monthly precipitation patterns in Round Lake, 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 Round Lake, May typically receives around 103 mm (4.0 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec81988213810310414210399158109110
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Round Lake

In Round Lake in May humidity is 76%. With an average temperature of 15°C (59°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities less enjoyable and often leading to a quick sense of fatigue while traveling.

May Average Humidity in Round Lake

This chart illustrates the average monthly humidity levels in Round Lake, 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 Round Lake is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%88%86%84%76%72%67%64%72%81%87%85%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Round Lake

In Round Lake 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 Round Lake.

Maximum UV Index Levels in Round Lake for May

The chart shows the monthly maximum UV Index (UVI) for Round Lake 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 Round Lake typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3468910997532
Data source: Round Lake 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 Round Lake Compares to Other Months

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

This table compares monthly weather conditions in Round Lake, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)81 mm (3.2 inches)89%moderate
February Weather-2°C (28°F)98 mm (3.8 inches)88%moderate
March Weather1°C (35°F)82 mm (3.2 inches)86%high
April Weather8°C (47°F)138 mm (5.4 inches)84%very high
May Weather15°C (59°F)103 mm (4.0 inches)76%very high
June Weather19°C (67°F)104 mm (4.1 inches)72%very high
July Weather23°C (73°F)142 mm (5.6 inches)66%very high
August Weather22°C (71°F)103 mm (4.1 inches)64%very high
September Weather18°C (64°F)99 mm (3.9 inches)72%high
October Weather12°C (53°F)158 mm (6.2 inches)81%moderate
November Weather3°C (38°F)109 mm (4.3 inches)87%moderate
December Weather-1°C (30°F)110 mm (4.3 inches)84%low

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