July Weather in Lewiston, United States

Last updated: June 24, 2025

In Lewiston, United States, the average temperature in July is a pleasant 22°C (71°F). Expect a minimum of 6°C (43°F) and a maximum of 33°C (91°F), offering a nice range for any activity. During this month, you can anticipate about 17 mm (0.7 in) of precipitation spread over 4 days, with an average humidity level around 44%. Enjoy your time in this vibrant destination!

July Temperature in Lewiston

In July in Lewiston, the average temperature is 22°C (71°F), with maximums reaching up to 33°C (91°F) and minimums dropping as low as 6°C (43°F). This diverse range of temperatures makes it a perfect time for travelers to enjoy a variety of outdoor activities while experiencing comfortable weather.

July Weather in Lewiston: Daily Temperature Highs, Lows, and Averages

The chart illustrates July temperature patterns in Lewiston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lewiston, July typically has an average temperature of 22°C (71°F), with highs reaching up to 33°C (91°F) and lows dropping to around 6°C (43°F).

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

July Precipitation in Lewiston

In Lewiston in July, the precipitation amount is 17 mm (0.7 in) over a span of 4 days.

July Precipitation Trends in Lewiston

The chart displays monthly precipitation patterns in Lewiston, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In Lewiston, July typically receives around 17 mm (0.7 inches) of precipitation spread over approximately 4 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

July Humidity in Lewiston

In Lewiston in July, humidity is 44%. With an average temperature of 22°C (71°F), this humidity feels like a refreshing embrace, making it pleasant for traveling and exploring the sights without discomfort.

July Average Humidity in Lewiston

This chart illustrates the average monthly humidity levels in Lewiston, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in Lewiston is approximately 44%, offering insight into how humid the weather typically is during this month.

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

July UV Index in Lewiston

In Lewiston in July, 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 Lewiston.

Maximum UV Index Levels in Lewiston for July

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

Data source: Lewiston July 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 July Weather in Lewiston Compares to Other Months

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

This table compares monthly weather conditions in Lewiston, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-5°C (23°F)	68 mm (2.7 inches)	91%	moderate
February Weather	-4°C (25°F)	89 mm (3.5 inches)	92%	moderate
March Weather	1°C (34°F)	63 mm (2.5 inches)	84%	very high
April Weather	4°C (40°F)	78 mm (3.1 inches)	74%	very high
May Weather	9°C (49°F)	66 mm (2.6 inches)	62%	extreme
June Weather	17°C (62°F)	31 mm (1.2 inches)	56%	extreme
July Weather	22°C (71°F)	17 mm (0.7 inches)	44%	extreme
August Weather	20°C (69°F)	23 mm (0.9 inches)	37%	extreme
September Weather	15°C (59°F)	36 mm (1.4 inches)	46%	very high
October Weather	6°C (43°F)	49 mm (1.9 inches)	67%	high
November Weather	0°C (33°F)	56 mm (2.2 inches)	84%	moderate
December Weather	-5°C (23°F)	59 mm (2.3 inches)	88%	moderate