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June Weather in Grand Junction, United States

Last updated: June 24, 2025

In Grand Junction, United States, the average temperature in June is a comfortable 23°C (74°F). However, be prepared for temperature swings, as it can drop to a chilly 9°C (48°F) at night or soar up to a scorching 39°C (102°F) during the day. Expect some rainfall, with an average precipitation of 101 mm (4.0 in) spread over 10 days, and keep in mind the average humidity sits at a sticky 81%.

June Temperature in Grand Junction

In June in Grand Junction, the average temperature is 23°C (74°F), with maximums reaching up to 39°C (102°F) and minimums dropping as low as 9°C (48°F). It’s a great time to enjoy a mix of warm days and cooler evenings during your travels.

June Weather in Grand Junction: Daily Temperature Highs, Lows, and Averages

The chart illustrates June temperature patterns in Grand Junction, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grand Junction, June typically has an average temperature of 23°C (74°F), with highs reaching up to 39°C (102°F) and lows dropping to around 9°C (48°F).
JanFebMarAprMayJunJulAugSepOctNovDec222339496274777368523830
Data source: Temperature data for Grand Junction 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 Grand Junction

In Grand Junction in June, the precipitation amount is 101 mm (4.0 in) spread over the course of 10 days.

June Precipitation Trends in Grand Junction

The chart displays monthly precipitation patterns in Grand Junction, 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 Grand Junction, June typically receives around 101 mm (4.0 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec3239766616310184901081233637
Data source: Precipitation data for June generated using information from the Copernicus Climate Change Service.
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June Humidity in Grand Junction

In Grand Junction in June, humidity is 81%. With an average temperature of 23°C (74°F), this humidity feels like a warm, heavy blanket draped over your skin, making travel feel a bit more sluggish and requiring plenty of water breaks to stay comfortable.

June Average Humidity in Grand Junction

This chart illustrates the average monthly humidity levels in Grand Junction, 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 Grand Junction is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%80%77%78%77%81%81%77%73%75%85%83%
Data source: Humidity data for June generated using information from the Copernicus Climate Change Service.

June UV Index in Grand Junction

In Grand Junction 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 Grand Junction.

Maximum UV Index Levels in Grand Junction for June

The chart shows the monthly maximum UV Index (UVI) for Grand Junction 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 Grand Junction typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35589111098643
Data source: Grand Junction 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 Grand Junction Compares to Other Months

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

This table compares monthly weather conditions in Grand Junction, showing how June’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (22°F)32 mm (1.3 inches)78%moderate
February Weather-5°C (23°F)39 mm (1.5 inches)80%moderate
March Weather4°C (39°F)76 mm (3.0 inches)77%moderate
April Weather9°C (49°F)66 mm (2.6 inches)77%very high
May Weather17°C (62°F)163 mm (6.4 inches)77%very high
June Weather23°C (74°F)101 mm (4.0 inches)81%extreme
July Weather25°C (77°F)84 mm (3.3 inches)81%very high
August Weather23°C (74°F)90 mm (3.5 inches)77%very high
September Weather20°C (68°F)108 mm (4.2 inches)73%very high
October Weather11°C (52°F)122 mm (4.8 inches)75%high
November Weather3°C (38°F)36 mm (1.4 inches)85%moderate
December Weather-1°C (30°F)37 mm (1.4 inches)83%moderate

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