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June Weather in Helena, United States

Last updated: June 24, 2025

In Helena, United States, the average temperature in June hovers around 14°C (58°F), with minimums dipping to 0°C (33°F) and maximums reaching 34°C (94°F). Expect 107 mm (4.2 in) of precipitation spread over 12 days, contributing to an average humidity of 78%—ideal for lush landscapes and vibrant scenery.

June Temperature in Helena

In June in Helena, the average temperature is 14°C (58°F). Maximum temperatures can reach up to 34°C (94°F), while minimum temperatures can drop as low as 0°C (33°F). Be prepared for a variety of weather conditions while exploring Helena during this time.

June Weather in Helena: Daily Temperature Highs, Lows, and Averages

The chart illustrates June temperature patterns in Helena, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Helena, June typically has an average temperature of 14°C (58°F), with highs reaching up to 34°C (94°F) and lows dropping to around 0°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec191629364858666555393021
Data source: Temperature data for Helena 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 Helena

In Helena in June, the precipitation amount is 107 mm (4.2 in) spread over 12 days.

June Precipitation Trends in Helena

The chart displays monthly precipitation patterns in Helena, 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 Helena, June typically receives around 107 mm (4.2 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec2351386788107313444413333
Data source: Precipitation data for June generated using information from the Copernicus Climate Change Service.
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June Humidity in Helena

In Helena in June, humidity is 78%. With an average temperature of 14°C (58°F), this humidity feels like a damp embrace, making traveling a bit uncomfortable as the air clings to your skin, causing you to sweat more than usual while exploring.

June Average Humidity in Helena

This chart illustrates the average monthly humidity levels in Helena, 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 Helena 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 Helena

In Helena in June, 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 Helena.

Maximum UV Index Levels in Helena for June

The chart shows the monthly maximum UV Index (UVI) for Helena 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 Helena typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34689111098532
Data source: Helena 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 Helena Compares to Other Months

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

This table compares monthly weather conditions in Helena, showing how June’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-7°C (20°F)23 mm (0.9 inches)87%moderate
February Weather-9°C (16°F)51 mm (2.0 inches)88%moderate
March Weather-2°C (29°F)38 mm (1.5 inches)83%high
April Weather2°C (36°F)67 mm (2.7 inches)78%very high
May Weather9°C (48°F)88 mm (3.5 inches)76%very high
June Weather14°C (58°F)107 mm (4.2 inches)78%extreme
July Weather19°C (67°F)31 mm (1.2 inches)77%very high
August Weather18°C (65°F)34 mm (1.3 inches)71%very high
September Weather13°C (55°F)44 mm (1.7 inches)68%very high
October Weather4°C (40°F)41 mm (1.6 inches)72%moderate
November Weather-1°C (30°F)33 mm (1.3 inches)84%moderate
December Weather-6°C (21°F)33 mm (1.3 inches)90%low

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