June Weather in Grinnell, United States

Last updated: June 24, 2025

In Grinnell, United States, the average temperature in June hovers around 23°C (74°F). Expect a minimum of 9°C (48°F) and a maximum soaring to 37°C (98°F). With an average humidity of 81%, prepare for a sticky atmosphere. Rainfall can reach up to 133 mm (5.2 in) over 10 days, so don’t forget your umbrella!

June Temperature in Grinnell

In June in Grinnell, the average temperature is 23°C (74°F), with maximums reaching up to 37°C (98°F) and minimums dropping as low as 9°C (48°F). Be sure to pack both lightweight clothing for the warm days and a light jacket for the cooler evenings!

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

The chart illustrates June temperature patterns in Grinnell, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grinnell, June typically has an average temperature of 23°C (74°F), with highs reaching up to 37°C (98°F) and lows dropping to around 9°C (48°F).

Data source: Temperature data for Grinnell generated using information from the Copernicus Climate Change Service.

June Precipitation in Grinnell

In Grinnell in June, the total precipitation amount is 133 mm (5.2 in) spread over a period of 10 days.

June Precipitation Trends in Grinnell

The chart displays monthly precipitation patterns in Grinnell, 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 Grinnell, June typically receives around 133 mm (5.2 inches) of precipitation spread over approximately 10 days.

Data source: Precipitation data for June generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

June Humidity in Grinnell

In Grinnell 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 Grinnell

This chart illustrates the average monthly humidity levels in Grinnell, 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 Grinnell is approximately 81%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for June generated using information from the Copernicus Climate Change Service.

June UV Index in Grinnell

In Grinnell 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 Grinnell.

Maximum UV Index Levels in Grinnell for June

The chart shows the monthly maximum UV Index (UVI) for Grinnell 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 Grinnell typically reaches 11, which falls under the extreme exposure category.

Data source: Grinnell 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 Grinnell Compares to Other Months

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

This table compares monthly weather conditions in Grinnell, showing how June’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-6°C (22°F)	43 mm (1.7 inches)	78%	moderate
February Weather	-5°C (23°F)	48 mm (1.9 inches)	80%	moderate
March Weather	4°C (39°F)	79 mm (3.1 inches)	77%	high
April Weather	9°C (49°F)	81 mm (3.2 inches)	77%	very high
May Weather	17°C (62°F)	166 mm (6.5 inches)	77%	very high
June Weather	23°C (74°F)	133 mm (5.2 inches)	81%	extreme
July Weather	24°C (76°F)	81 mm (3.2 inches)	81%	very high
August Weather	23°C (73°F)	71 mm (2.8 inches)	77%	very high
September Weather	20°C (68°F)	118 mm (4.7 inches)	73%	very high
October Weather	11°C (53°F)	145 mm (5.7 inches)	75%	high
November Weather	3°C (38°F)	46 mm (1.8 inches)	85%	moderate
December Weather	-1°C (31°F)	38 mm (1.5 inches)	83%	moderate