July Weather in Lewiston, United States

Last updated: June 24, 2025

In Lewiston, United States during July, the average temperature hovers around 25°C (77°F), with a minimum that can dip to 10°C (51°F) and a maximum soaring to 40°C (104°F). Expect a light drizzle with only 2 mm (0.1 in) of precipitation across 0 days. The air is relatively humid, with an average of 70% humidity, creating a comfortable atmosphere for outdoor activities.

July Temperature in Lewiston

In July in Lewiston, the average temperature is 25°C (77°F). Maximum temperatures can reach 40°C (104°F), while minimums can drop as low as 10°C (51°F). Be prepared for a range of weather conditions when traveling 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 25°C (77°F), with highs reaching up to 40°C (104°F) and lows dropping to around 10°C (51°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 2 mm (0.1 in) during a span 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 2 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.

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Millimeters (mm) Inches (in)

July Humidity in Lewiston

In Lewiston in July, humidity is 70%. With an average temperature of 25°C (77°F), this humidity feels like walking through a warm, moist blanket that clings to your skin, making every step feel heavier as you explore the sights and sounds of your destination.

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 70%, 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	4°C (40°F)	163 mm (6.4 inches)	86%	moderate
February Weather	5°C (41°F)	156 mm (6.1 inches)	85%	moderate
March Weather	7°C (44°F)	137 mm (5.4 inches)	85%	high
April Weather	11°C (51°F)	82 mm (3.2 inches)	82%	very high
May Weather	15°C (59°F)	62 mm (2.4 inches)	81%	extreme
June Weather	20°C (69°F)	15 mm (0.6 inches)	79%	extreme
July Weather	25°C (77°F)	2 mm (0.1 inches)	70%	extreme
August Weather	24°C (76°F)	4 mm (0.1 inches)	60%	very high
September Weather	20°C (68°F)	12 mm (0.5 inches)	62%	very high
October Weather	13°C (56°F)	52 mm (2.0 inches)	72%	high
November Weather	8°C (46°F)	97 mm (3.8 inches)	87%	moderate
December Weather	4°C (39°F)	118 mm (4.6 inches)	86%	moderate