July Weather in Lewiston, United States

Last updated: June 24, 2025

In Lewiston, United States, the average temperature for July hovers around 24°C (76°F). Temperatures can fluctuate dramatically, with lows of 9°C (49°F) and scorching highs reaching 42°C (107°F). Visitors can expect a minimal precipitation of just 3 mm (0.1 in) over 0 days of rain, while the average humidity levels sit comfortably at 77%. Perfect weather for exploration!

July Temperature in Lewiston

In July in Lewiston, the average temperature is 24°C (76°F). The maximum can reach 42°C (107°F), while the minimum can drop as low as 9°C (49°F). It's essential to pack for a range of weather conditions when visiting during this time.

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 24°C (76°F), with highs reaching up to 42°C (107°F) and lows dropping to around 9°C (49°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 3 mm (0.1 in) during a total of 0 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 3 mm (0.1 inches) of precipitation spread over approximately 0 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 77%. With an average temperature of 24°C (76°F), this humidity feels like traveling through a warm, heavy blanket that clings to your skin, making each step feel like a gentle workout as the air wraps around you, urging you to move at a leisurely pace and seek out shade whenever possible.

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 77%, 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 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, 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 10, which falls under the very high 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	0°C (32°F)	58 mm (2.3 inches)	89%	low
February Weather	1°C (33°F)	95 mm (3.7 inches)	89%	moderate
March Weather	5°C (41°F)	64 mm (2.5 inches)	87%	high
April Weather	9°C (49°F)	51 mm (2.0 inches)	84%	very high
May Weather	14°C (58°F)	47 mm (1.8 inches)	77%	very high
June Weather	19°C (66°F)	28 mm (1.1 inches)	78%	very high
July Weather	24°C (76°F)	3 mm (0.1 inches)	77%	very high
August Weather	24°C (75°F)	8 mm (0.3 inches)	64%	very high
September Weather	18°C (64°F)	22 mm (0.9 inches)	62%	high
October Weather	10°C (50°F)	52 mm (2.1 inches)	79%	moderate
November Weather	4°C (40°F)	65 mm (2.6 inches)	87%	moderate
December Weather	1°C (33°F)	74 mm (2.9 inches)	90%	low