Mild
Average highs are around 21°C, so days are mild rather than hot.
May verdict
Lewiston, Idaho, United States in May
Weather score55Good
Good for holiday weather
Average highs are around 21°C, so days are mild rather than hot. Sunshine averages 9h per day, so bright days are a strong part of the month. Rainfall averages 42mm, which is relatively low for holiday planning.
May weather
Monthly averages
Temp
21°C
Rain
42mm
Sun
9h
Weather score
55
Good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 42mm, which is relatively low for holiday planning.
Bright
Sunshine averages 9h per day, so bright days are a strong part of the month.
Map
Weather map
Compare Lewiston, Idaho, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
May21°C average high
May is close to Lewiston's yearly temperature average, giving a typical read on daytime heat.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
May42mm average rain
May is close to Lewiston's usual rainfall pattern, with little seasonal change across the year.
Driest monthsAll year
Rainfall stays comparatively low through the year.
Sun
May9 hours average sun
May sits close to Lewiston's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsJuly to August
This stretch has the strongest sunshine in the monthly averages.
Weather score
May55 weather score
May sits close to Lewiston's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJuly to August
These months have the strongest weather score in the monthly averages.
