Mild
Average highs are around 22°C, so days are mild rather than hot.
September verdict
Mixed for holiday weather
Average highs are around 22°C, so days are mild rather than hot. Sunshine averages 6.6h per day, enough for a balanced month. Rainfall averages 80mm, so some wet days are possible.

Monthly averages
Temp
22°C
Rain
80mm
Sun
6.6h
Sea
20°C
Weather score
51
Mixed
Mild
Average highs are around 22°C, so days are mild rather than hot.
Showers
Rainfall averages 80mm, so some wet days are possible.
Some sun
Sunshine averages 6.6h per day, enough for a balanced month.
Cool sea
Sea temperatures average 20°C, so the water can feel cool.
Map
Compare Geneva, New York, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
September22°C average high
September sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
September80mm average rain
September is wetter than Geneva's yearly average, so flexible plans matter more.
Driest monthsJanuary to May, July to August, October, and December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
September6.6 hours average sun
September sits close to Geneva's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsMay to August
This stretch has the strongest sunshine in the monthly averages.
September20°C average sea
September sits in the warmer sea-temperature season, usually making swimming easier to enjoy.
Warmest seaJuly to September
Sea temperatures are usually near 21°C in this stretch, so swimming comfort is at its strongest.
September51 weather score
September sits close to Geneva'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.