Lewiston Weather in August

During August, Lewiston experiences high daytime temperatures of 26°C (79°F) and cooler nights around 14°C (57°F). As part of the summer season, expect quite a bit of rainfall. Around 119 mm (4.7 in) is typical.

Rainfall in Lewiston in August

Historically, August sees about 12 days of rain, with a monthly average of 119 mm (4.7 in). The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in Lewiston in August

Daytime temperatures in Lewiston reach 26°C (79°F) in August, dropping to 14°C (57°F) at night. The summer season is characteristic of August. Overall, the month follows a fairly predictable daily temperature pattern. With lows of 14°C (57°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.

Sunshine in Lewiston in August

Expect sunny days throughout the month, with an estimated 267 hours of sunshine. This makes it a pleasant time to visit Lewiston.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. May, June, July, August and September typically offer the best weather for Lewiston.

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For a detailed overview over the year and the best time to visit the United States of America, check out our Lewiston's climate page.

Lewiston Temperature in August

Min Temperature 14°C (57°F)  

Max Temperature 26°C (79°F)  

Chance of Rain 41%  

Precipitation 119 mm (4.7 in)  

Rainy days 12 days  

Humidity 76% *  

Sunshine 267 hours *  

Percentage Sunshine 62% *  

* Data from: Portland, the United States of America (48 KM, 30 Miles).

What to Wear in Lewiston in August

Warm weather calls for comfortable, breathable clothing in August. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). High rain levels are expected, so pack waterproof gear and an umbrella or poncho. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Lewiston in August

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

9/10

Cycling

7/10

Walking

7/10

Camping

6/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Lewiston's climate page.

More climate data for Lewiston

Temperature Rainfall Sunshine Humidity

See the full Lewiston climate overview or explore weather in the United States of America.