The highest day temperature in April 2026 was 76°F. The lowest night temperature was 39°F. The average values for day and night temperatures during April were 68.7°F и 46.6°F respectivly.

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

Precipitation total in April for Siena is 1.6 in. It makes april one of the least rainy months of the year.

The average wind speed in April is 5.9 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 April is 8.9 hours.