Lewiston Weather in May

May in Lewiston brings pleasant temperatures around 19°C (66°F) during the day, dropping to 7°C (45°F) at night, with quite a bit of rainfall expected, averaging around 93 mm (3.7 in) for the month.

Rainfall in Lewiston in May

Past climate data indicates that roughly 14 days will see rain, totalling around 93 mm (3.7 in) for the month. The rainfall pattern this month is fairly balanced. Showers tend to be moderate rather than extreme.

Temperature in Lewiston in May

If you're visiting Lewiston in May, expect highs of 19°C (66°F) and overnight lows around 7°C (45°F). This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. Nights drop to 7°C (45°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.

Sunshine in Lewiston in May

Enjoy a sunny month with about 244 hours of sunshine, the clear skies make Lewiston even more beautiful.

If you favor pleasant temperatures and minimal rainfall, May is one of the best months to visit Lewiston.

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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.

Lewiston Temperature in May

Min Temperature 7°C (45°F)  

Max Temperature 19°C (66°F)  

Chance of Rain 47%  

Precipitation 93 mm (3.7 in)  

Rainy days 14 days  

Humidity 71% *  

Sunshine 244 hours *  

Percentage Sunshine 53% *  

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

What to Wear in Lewiston in May

Comfortable temperatures call for an easy wardrobe in May. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Expect heavy rainfall, so bring good rain protection and waterproof bags. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Lewiston in May

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

Cycling

9/10

Walking

9/10

Camping

4/10

Outdoor sports

9/10

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.