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June Weather in Keystone, United States

Last updated: June 24, 2025

In Keystone, United States, the average temperature in June is a pleasant 23°C (73°F), with a minimum of 9°C (49°F) and a maximum soaring to 36°C (96°F). Expect about 143 mm (5.6 in) of precipitation spread over 10 days, accompanied by an average humidity level of 81%. Get ready for a varied climate that keeps things interesting!

June Temperature in Keystone

In June in Keystone, the average temperature is 23°C (73°F). Maximum can reach 36°C (96°F) and minimum can be as low as 9°C (49°F). This diverse temperature range makes it an ideal destination for travelers looking for both warmth and cooler evenings.

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

The chart illustrates June temperature patterns in Keystone, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Keystone, June typically has an average temperature of 23°C (73°F), with highs reaching up to 36°C (96°F) and lows dropping to around 9°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec212338486273757267523730
Data source: Temperature data for Keystone 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 Keystone

In Keystone in June, the precipitation amount is 143 mm (5.6 in) over the course of 10 days.

June Precipitation Trends in Keystone

The chart displays monthly precipitation patterns in Keystone, 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 Keystone, June typically receives around 143 mm (5.6 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec4552738516214391641211434540
Data source: Precipitation data for June generated using information from the Copernicus Climate Change Service.
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June Humidity in Keystone

In Keystone in June, humidity is 81%. With an average temperature of 23°C (73°F), this humidity feels like a heavy blanket wrapping around you, making every step feel more laborious while traveling and causing you to constantly seek out shade or a cool breeze for relief.

June Average Humidity in Keystone

This chart illustrates the average monthly humidity levels in Keystone, 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 Keystone is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%81%81%82%78%81%79%77%78%79%87%84%
Data source: Humidity data for June generated using information from the Copernicus Climate Change Service.

June UV Index in Keystone

In Keystone 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 Keystone.

Maximum UV Index Levels in Keystone for June

The chart shows the monthly maximum UV Index (UVI) for Keystone 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 Keystone typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35689111098633
Data source: Keystone 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 Keystone Compares to Other Months

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

This table compares monthly weather conditions in Keystone, showing how June’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (21°F)45 mm (1.8 inches)81%moderate
February Weather-5°C (23°F)52 mm (2.1 inches)81%moderate
March Weather3°C (38°F)73 mm (2.9 inches)81%high
April Weather9°C (48°F)85 mm (3.3 inches)82%very high
May Weather16°C (62°F)162 mm (6.4 inches)78%very high
June Weather23°C (73°F)143 mm (5.6 inches)81%extreme
July Weather24°C (76°F)91 mm (3.6 inches)79%very high
August Weather22°C (72°F)64 mm (2.5 inches)77%very high
September Weather20°C (67°F)121 mm (4.8 inches)78%very high
October Weather11°C (52°F)143 mm (5.6 inches)78%high
November Weather3°C (38°F)45 mm (1.8 inches)87%moderate
December Weather-1°C (30°F)40 mm (1.6 inches)84%moderate

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