Warm
Average highs sit around 27°C, giving warm days by monthly-average standards.
Weather Guide
Lake Geneva, Wisconsin, United States Average Monthly Weather
Weather score41Mixed annual avg
Best months: July, August, June
Across the year, average daytime temperatures are around 14°C, sunshine averages 6.7h per day, and rainfall totals about 861mm. Sea temperatures average 10°C across the year.
Annual weather
Annual averages
Temp
14°C
Rain
861mm
Annual total
Sun
6.7h
Sea
10°C
Weather score
41
Mixed avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 101mm, so some wet days are possible.
Bright
Sunshine averages 8.9h per day, so bright days are a strong part of the month.
Cool sea
Sea temperatures average 22°C, so the water can feel cool.
Map
Weather map
Compare Lake Geneva, Wisconsin, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
August27°C average high
August is one of Lake Geneva's warmest months, with daytime heat above the yearly average.
Warmest monthsMay to September
This stretch sets the upper range for average daytime heat.
Rain
August101mm average rain
August is one of Lake Geneva's wettest months, so rain is likely to be a major planning factor.
Driest monthsJanuary to February and December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
August8.9 hours average sun
August is brighter than Lake Geneva's yearly average, though the strongest sunshine usually sits closer to the peak months.
Brightest monthsMay to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
August22°C average sea
August is one of Lake Geneva's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJuly to September
Sea temperatures are usually near 20°C in this stretch, so swimming comfort is at its strongest.
Weather score
August68 weather score
August is one of Lake Geneva'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.
