Lewiston weather averages

Going to Lewiston? Find the best month to visit Lewiston based on the weather.

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Check Lewiston weather averages before you book your next holiday in 2019/2020. Today's maximum temperature in Lewiston is expected to be 25°C, while the average maximum temperature in May is 21°C.

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More about Lewiston

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The weather for Lewiston, Idaho shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by MeteoBlue. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

Lewiston weather averages: best month

Lewiston Best month Averages
Warmest July & August 31°C
Sunniest July 14 hours per day
Least rain July & August 5 days

Lewiston climate guide

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Lewiston weather averages by month

Check Lewiston holiday weather averages for a particular month by selecting from the list below. Monthly weather guides include figures for temperature, rainfall, sunshine hours and sea temperature plus daily sunrise & sunset times.

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Compare Lewiston weather with the USA

Below the Lewiston weather chart shows maximum daytime temperature for Lewiston, Idaho, USA and the USA (Washington). For more weather parameters or to change the destinations shown visit the comparison weather tool.

Maximum daytime temperature (°C)

Lewiston, Idaho, USA
USA (Washington)
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Metric (°C / mm)  |  Imperial (°F / inches)

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