Warm
Average highs sit around 31°C, giving warm days by monthly-average standards.
July verdict
Excellent for holiday weather
Average highs sit around 31°C, giving warm days by monthly-average standards. Sunshine averages 14h per day, so bright days are a strong part of the month. Rainfall averages 18mm, which is relatively low for holiday planning.

Monthly averages
Temp
31°C
Rain
18mm
Sun
14h
Weather score
90
Excellent
Warm
Average highs sit around 31°C, giving warm days by monthly-average standards.
Drier
Rainfall averages 18mm, which is relatively low for holiday planning.
Bright
Sunshine averages 14h per day, so bright days are a strong part of the month.
Map
Compare Lewiston, Idaho, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
July31°C average high
July is one of Lewiston's warmest months, with daytime heat above the yearly average.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
July18mm average rain
July 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.
July14 hours average sun
July is one of Lewiston's sunniest months, with some of the strongest bright-day conditions in the yearly averages.
Brightest monthsJuly to August
This stretch has the strongest sunshine in the monthly averages.
July90 weather score
July is one of Lewiston's best weather-score months, combining the strongest overall balance in the yearly averages.
Best weather monthsJuly to August
These months have the strongest weather score in the monthly averages.