Warm
Average highs sit around 28°C, giving warm days by monthly-average standards.
August verdict
Very good for holiday weather
Average highs sit around 28°C, giving warm days by monthly-average standards. Sunshine averages 8.7h per day, so bright days are a strong part of the month. Rainfall averages 43mm, which is relatively low for holiday planning.

Monthly averages
Temp
28°C
Rain
43mm
Sun
8.7h
Weather score
82
Very good
Warm
Average highs sit around 28°C, giving warm days by monthly-average standards.
Drier
Rainfall averages 43mm, which is relatively low for holiday planning.
Bright
Sunshine averages 8.7h per day, so bright days are a strong part of the month.
Map
Compare Siena, Italy with nearby places by weather score, rain, sun, temperature, and swim conditions.
August28°C average high
August is one of Siena's warmest months, with daytime heat above the yearly average.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
August43mm average rain
August sits on the drier side of Siena's year, which helps with sightseeing and transfers.
Driest monthsMay to August
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
August8.7 hours average sun
August is brighter than Siena'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.
August82 weather score
August is one of Siena's best weather-score months, combining the strongest overall balance in the yearly averages.
Best weather monthsJune to August
These months have the strongest weather score in the monthly averages.