Cool
Average highs are around 18°C, so pack for cooler days.
May verdict
Mixed for holiday weather
Average highs are around 18°C, so pack for cooler days. Sunshine averages 7.5h per day, enough for a balanced month. Rainfall averages 30mm, which is relatively low for holiday planning.
Monthly averages
Temp
18°C
Rain
30mm
Sun
7.5h
Weather score
42
Mixed
Cool
Average highs are around 18°C, so pack for cooler days.
Drier
Rainfall averages 30mm, which is relatively low for holiday planning.
Some sun
Sunshine averages 7.5h per day, enough for a balanced month.
Map
Compare Winthrop (Washington), United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
May18°C average high
May 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.
May30mm average rain
May sits on the drier side of Winthrop (Washington)'s year, which helps with sightseeing and transfers.
Driest monthsMarch to October
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
May7.5 hours average sun
May is brighter than Winthrop (Washington)'s yearly average, though the strongest sunshine usually sits closer to the peak months.
Brightest monthsJune to August
This stretch has the strongest sunshine in the monthly averages.
May42 weather score
May sits close to Winthrop (Washington)'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.
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