Lewiston Weather In May
In the last 64 years the highest measured May temperature in Lewiston was 100 degrees Fahrenheit, most recently measured on May 28, 1983, while the normal high temperature is 70. The coldest day reported in Lewiston in May for the past 64 years was 23 measured on May 2, 1954, while the average low temperature is 47.
United States National Weather Service historical Lewiston May Weather data shows that on May 13, 1955, the high temperature did not exceed 45 degrees Fahrenheit, the lowest high measured in Lewiston in the past 64 years. Weather Service records additionally indicate that on May 27, 1986, the low for the day was not measured below 68 degrees, the highest low temperature recorded in Lewiston in the last 64 years.
National Weather Service records indicate that the high temperature in Lewiston on May First averages 67 degrees and the high on the last day of the month averages 74 degrees. The daily low temperature in Lewiston on May First averages 42 degrees Fahrenheit and the low on the last day of May averages 49 degrees.
Lewiston typically receives an average of 1.56 inches of precipitation during the month. The most precipitation recorded on a single day in May, according to May Lewiston Weather data, was 1.32 inches on May 18, 1991.