Warm
Average highs sit around 29°C, giving warm days by monthly-average standards.
May verdict
Very good for holiday weather
Average highs sit around 29°C, giving warm days by monthly-average standards. Sunshine averages 12h per day, so bright days are a strong part of the month. Rainfall averages 3mm, which is relatively low for holiday planning.
Monthly averages
Temp
29°C
Rain
3mm
Sun
12h
Weather score
85
Very good
Warm
Average highs sit around 29°C, giving warm days by monthly-average standards.
Drier
Rainfall averages 3mm, which is relatively low for holiday planning.
Bright
Sunshine averages 12h per day, so bright days are a strong part of the month.
Map
Compare Sierra Vista, Arizona, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
May29°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.
May3mm average rain
May is one of Sierra Vista's driest months, making outdoor days easier to plan than in wetter parts of the year.
Driest monthsJanuary to June and October to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
May12 hours average sun
May is one of Sierra Vista's sunniest months, with some of the strongest bright-day conditions in the yearly averages.
Brightest monthsMay to June
This stretch has the strongest sunshine in the monthly averages.
May85 weather score
May scores above Sierra Vista's yearly average, so the overall weather mix is stronger than most months.
Best weather monthsMay to June and September
These months have the strongest weather score in the monthly averages.