August Weather in Lewiston, United States

Last updated: June 24, 2025

In August, the average temperature in Lewiston, United States is a comfortable 22°C (73°F), with a minimum of 15°C (59°F) and a maximum reaching 29°C (84°F). Expect around 85 mm (3.3 in) of precipitation spread over 12 days, and enjoy the refreshing average humidity of 72%. Plan your activities accordingly to make the most of this delightful climate!

August Temperature in Lewiston

In August in Lewiston, the average temperature is 22°C (73°F). The maximum can reach 29°C (84°F), and the minimum can be as low as 15°C (59°F). This pleasant weather makes it an ideal time for outdoor activities and sightseeing adventures.

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

The chart illustrates August 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, August typically has an average temperature of 22°C (73°F), with highs reaching up to 29°C (84°F) and lows dropping to around 15°C (59°F).

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

August Precipitation in Lewiston

In Lewiston in August, the precipitation amount is 85 mm (3.3 in) over a duration of 12 days.

August Precipitation Trends in Lewiston

The chart displays monthly precipitation patterns in Lewiston, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Lewiston, August typically receives around 85 mm (3.3 inches) of precipitation spread over approximately 12 days.

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

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Millimeters (mm) Inches (in)

August Humidity in Lewiston

In Lewiston in August, humidity is 72%. With an average temperature of 22°C (73°F), this humidity feels like a warm embrace, making it ideal for leisurely strolls but potentially uncomfortable for prolonged outdoor activities.

August Average Humidity in Lewiston

This chart illustrates the average monthly humidity levels in Lewiston, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Lewiston is approximately 72%, offering insight into how humid the weather typically is during this month.

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

August UV Index in Lewiston

In Lewiston in August, 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 Lewiston.

Maximum UV Index Levels in Lewiston for August

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

Data source: Lewiston August 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 August 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 August’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 August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-2°C (29°F)	78 mm (3.1 inches)	91%	low
February Weather	-1°C (30°F)	87 mm (3.4 inches)	91%	moderate
March Weather	2°C (35°F)	71 mm (2.8 inches)	88%	moderate
April Weather	6°C (43°F)	118 mm (4.6 inches)	88%	very high
May Weather	11°C (53°F)	99 mm (3.9 inches)	82%	very high
June Weather	18°C (64°F)	81 mm (3.2 inches)	79%	very high
July Weather	23°C (73°F)	115 mm (4.5 inches)	77%	very high
August Weather	22°C (73°F)	85 mm (3.3 inches)	72%	very high
September Weather	19°C (66°F)	73 mm (2.9 inches)	76%	high
October Weather	13°C (56°F)	128 mm (5.0 inches)	83%	moderate
November Weather	6°C (42°F)	89 mm (3.5 inches)	88%	moderate
December Weather	1°C (35°F)	90 mm (3.5 inches)	87%	low