Currently, February is the cheapest month in which you can book a flight from Knoxville to Lewiston, Idaho (average of $278). Flying from Knoxville to Lewiston, Idaho in May is currently the most expensive (average of $534). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
In terms of precipitation, rainfall in Lewiston, Idaho ranges from 0.3 - 1.7 inches per month. June is typically the wettest month, when rainfall can reach 1.7 in. August is typically the driest time to visit Lewiston, Idaho when rainfall is around 0.3 in.
If weather is an important factor for your trip to Lewiston, Idaho, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 75.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 33.8 F).