Cool
Average highs are around 19°C, so pack for cooler days.
May verdict
Mixed for holiday weather
Average highs are around 19°C, so pack for cooler days. Sunshine averages 8h per day, so bright days are a strong part of the month. Rainfall averages 90mm, so some wet days are possible.
Monthly averages
Temp
19°C
Rain
90mm
Sun
8h
Weather score
40
Mixed
Cool
Average highs are around 19°C, so pack for cooler days.
Showers
Rainfall averages 90mm, so some wet days are possible.
Bright
Sunshine averages 8h per day, so bright days are a strong part of the month.
Map
Compare Olean, New York, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
May19°C average high
May sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsMay to September
This stretch sets the upper range for average daytime heat.
May90mm average rain
May sits near Olean's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to May and October to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
May8 hours average sun
May is brighter than Olean'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.
May40 weather score
May sits close to Olean's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJune to August
These months have the strongest weather score in the monthly averages.