June Weather in Grafton, United States

Last updated: June 24, 2025

In Grafton, United States, the average temperature in June hovers around 20°C (68°F), offering a comfortable climate for outdoor activities. However, be prepared for temperature swings, as it can dip as low as 5°C (41°F) and soar up to 42°C (107°F). During this month, expect about 64 mm (2.5 in) of precipitation spread over roughly 9 days, contributing to an average humidity of 72%. Stay hydrated and enjoy the weather!

June Temperature in Grafton

In June in Grafton, the average temperature is 20°C (68°F). Maximums can reach 42°C (107°F) and minimums can be as low as 5°C (41°F). Be prepared for a wide range of temperatures and pack accordingly for your trip!

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

The chart illustrates June temperature patterns in Grafton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grafton, June typically has an average temperature of 20°C (68°F), with highs reaching up to 42°C (107°F) and lows dropping to around 5°C (41°F).

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

June Precipitation in Grafton

In Grafton in June, the precipitation amount is 64 mm (2.5 in) over a span of 9 days.

June Precipitation Trends in Grafton

The chart displays monthly precipitation patterns in Grafton, 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 Grafton, June typically receives around 64 mm (2.5 inches) of precipitation spread over approximately 9 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 Grafton

In Grafton in June humidity is 72%. With an average temperature of 20°C (68°F), this humidity feels like a heavy blanket enveloping you, making every step slightly more laborious and the air thick with moisture, which can be uncomfortable for traveling.

June Average Humidity in Grafton

This chart illustrates the average monthly humidity levels in Grafton, 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 Grafton is approximately 72%, 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 Grafton

In Grafton in June, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Grafton.

Maximum UV Index Levels in Grafton for June

The chart shows the monthly maximum UV Index (UVI) for Grafton 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 Grafton typically reaches 9, which falls under the very high exposure category.

Data source: Grafton 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 Grafton Compares to Other Months

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

This table compares monthly weather conditions in Grafton, showing how June’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-13°C (9°F)	17 mm (0.6 inches)	92%	low
February Weather	-14°C (7°F)	18 mm (0.7 inches)	90%	moderate
March Weather	-4°C (25°F)	22 mm (0.9 inches)	88%	moderate
April Weather	3°C (38°F)	27 mm (1.1 inches)	81%	high
May Weather	13°C (55°F)	48 mm (1.9 inches)	74%	very high
June Weather	20°C (68°F)	64 mm (2.5 inches)	72%	very high
July Weather	22°C (72°F)	54 mm (2.1 inches)	74%	very high
August Weather	20°C (68°F)	63 mm (2.5 inches)	76%	very high
September Weather	15°C (59°F)	82 mm (3.2 inches)	73%	high
October Weather	6°C (43°F)	79 mm (3.1 inches)	76%	moderate
November Weather	-3°C (26°F)	26 mm (1.0 inches)	86%	moderate
December Weather	-9°C (16°F)	30 mm (1.2 inches)	91%	low