The highest day temperature in July 2026 was 107°F. The lowest night temperature was 59°F. The average values for day and night temperatures during July were 98.5°F и 66.9°F respectivly.

Most of the days in July are sunny but you can also expect cloudy and gloomy days.

Precipitation total in July for Siena is 1.0 in. It makes july the least rainy month of the year.

The average wind speed in July is 5.7 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Siena in July is 12.9 hours.