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June Weather in Great Falls, United States

Last updated: June 24, 2025

In June, the average temperature in Great Falls, United States hovers around 18°C (64°F), but it can swing from a chilly 4°C (40°F) to a scorching 39°C (103°F). Expect 71 mm (2.8 in) of precipitation over 9 days, contributing to an average humidity of 78%, creating a uniquely vibrant atmosphere.

June Temperature in Great Falls

In June in Great Falls, the average temperature is 18°C (64°F), with maximums reaching up to 39°C (103°F) and minimums dropping as low as 4°C (40°F). This temperature range makes Great Falls a versatile destination for travelers, offering options for both warm-weather activities and cooler outings.

June Weather in Great Falls: Daily Temperature Highs, Lows, and Averages

The chart illustrates June temperature patterns in Great Falls, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Great Falls, June typically has an average temperature of 18°C (64°F), with highs reaching up to 39°C (103°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec271934425464737059453729
Data source: Temperature data for Great Falls 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.

June Precipitation in Great Falls

In Great Falls in June, the precipitation amount is 71 mm (2.8 in) spread over 9 days.

June Precipitation Trends in Great Falls

The chart displays monthly precipitation patterns in Great Falls, with values for each month alongside June’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how June’s conditions compare to those of other months. In Great Falls, June typically receives around 71 mm (2.8 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec164125606571122336383228
Data source: Precipitation data for June generated using information from the Copernicus Climate Change Service.
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June Humidity in Great Falls

In Great Falls in June, humidity is 78%. With an average temperature of 18°C (64°F), this humidity feels like a warm, thick blanket wrapping around you, making traveling feel a bit sticky and sluggish, yet the coolness of the air tempers the intensity, inviting you to explore at a leisurely pace.

June Average Humidity in Great Falls

This chart illustrates the average monthly humidity levels in Great Falls, with June’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In June, average humidity in Great Falls is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%88%83%78%76%78%77%71%68%72%84%91%
Data source: Humidity data for June generated using information from the Copernicus Climate Change Service.

June UV Index in Great Falls

In Great Falls in June, 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 Great Falls.

Maximum UV Index Levels in Great Falls for June

The chart shows the monthly maximum UV Index (UVI) for Great Falls in June, 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 June, the maximum UV index in Great Falls typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457910997532
Data source: Great Falls June 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 June Weather in Great Falls Compares to Other Months

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

This table compares monthly weather conditions in Great Falls, showing how June’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)16 mm (0.6 inches)87%low
February Weather-7°C (20°F)41 mm (1.6 inches)88%moderate
March Weather1°C (34°F)25 mm (1.0 inches)83%moderate
April Weather6°C (43°F)60 mm (2.4 inches)78%high
May Weather12°C (55°F)65 mm (2.5 inches)76%very high
June Weather18°C (64°F)71 mm (2.8 inches)78%very high
July Weather23°C (73°F)12 mm (0.5 inches)77%very high
August Weather21°C (70°F)23 mm (0.9 inches)71%very high
September Weather15°C (60°F)36 mm (1.4 inches)68%high
October Weather7°C (45°F)38 mm (1.5 inches)72%moderate
November Weather3°C (37°F)32 mm (1.3 inches)84%moderate
December Weather-2°C (29°F)27 mm (1.1 inches)90%low

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