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April Weather in Glen Ullin, United States

Last updated: June 24, 2025

In Glen Ullin, United States, the average temperature for April hovers around 4°C (40°F). Expect a minimum of -18°C (0°F) and a maximum that can reach 26°C (78°F). During this month, precipitation totals approximately 28 mm (1.1 in) spread over 7 days, while average humidity sits at a comfortable 75%.

April Temperature in Glen Ullin

In April in Glen Ullin, the average temperature is 4°C (40°F). Maximums can reach 26°C (78°F), while minimums can dip as low as -18°C (0°F). This wide temperature range makes Glen Ullin a compelling destination for travelers who appreciate both warm days and chilly nights.

April Weather in Glen Ullin: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Glen Ullin, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Glen Ullin, April typically has an average temperature of 4°C (40°F), with highs reaching up to 26°C (78°F) and lows dropping to around -18°C (0°F).
JanFebMarAprMayJunJulAugSepOctNovDec171430405568736960433123
Data source: Temperature data for Glen Ullin 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.

April Precipitation in Glen Ullin

In Glen Ullin in April, the precipitation amount is 28 mm (1.1 in) over a period of 7 days.

April Precipitation Trends in Glen Ullin

The chart displays monthly precipitation patterns in Glen Ullin, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Glen Ullin, April typically receives around 28 mm (1.1 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec121625286154617252511720
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Glen Ullin

In Glen Ullin in April, humidity is 75%. With an average temperature of 4°C (40°F), this humidity feels like a chilly, damp embrace that can make outdoor activities uncomfortable, as the cold moisture seeps into your clothes and reduces your warmth, leaving you feeling more frigid than uplifting.

April Average Humidity in Glen Ullin

This chart illustrates the average monthly humidity levels in Glen Ullin, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Glen Ullin is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%88%78%75%76%79%78%78%69%71%82%84%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Glen Ullin

In Glen Ullin in April, 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 Glen Ullin.

Maximum UV Index Levels in Glen Ullin for April

The chart shows the monthly maximum UV Index (UVI) for Glen Ullin in April, 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 April, the maximum UV index in Glen Ullin typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2459810997532
Data source: Glen Ullin April 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 April Weather in Glen Ullin Compares to Other Months

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

This table compares monthly weather conditions in Glen Ullin, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (17°F)12 mm (0.5 inches)84%low
February Weather-10°C (14°F)16 mm (0.6 inches)88%moderate
March Weather-1°C (31°F)25 mm (1.0 inches)78%moderate
April Weather4°C (40°F)28 mm (1.1 inches)75%very high
May Weather13°C (55°F)61 mm (2.4 inches)76%very high
June Weather20°C (68°F)54 mm (2.1 inches)79%very high
July Weather23°C (73°F)61 mm (2.4 inches)78%very high
August Weather21°C (70°F)72 mm (2.8 inches)78%very high
September Weather16°C (60°F)51 mm (2.0 inches)69%high
October Weather6°C (43°F)51 mm (2.0 inches)71%moderate
November Weather-1°C (31°F)17 mm (0.7 inches)82%moderate
December Weather-5°C (23°F)20 mm (0.8 inches)84%low

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