Quick answer: Siena sits at 43.3° N and gets about 12 h 11 min of daylight today, with the sun 47° up at solar noon. The panel above scores each upcoming day 0–100 and returns a direct go, wait or skip verdict.
Conditions on this page are recalculated from the latest forecast every time it is opened, for the current date in the location's own time zone.
Pick a ceremony date inside the 14-day forecast for Siena and read it as a wedding day: the Weather Score, rain probability and amount, sustained wind and gusts, heat and evening cool-down, plus sunset, golden hour and blue hour for photographs in Siena's timezone. Beyond 14 days the page makes no weather claim; the month-by-month daylight table shows how late natural light lasts in any month.
Any weather decision in Siena starts from the light budget. In September the location gets about 12 h 11 min of daylight, with the sun peaking 47° above the horizon — that sets how warm afternoons run, how long outdoor plans stay viable and how much usable photographic light the day contains. The scores above layer the live Open-Meteo forecast on top of that baseline.
Daylight, midday sun angle and golden-hour length below are calculated for Siena's own coordinates (43.32° N, 11.33° E) on the 15th of each month. These are solar geometry, not climate averages.
| Month | Daylight | Sun at solar noon | Golden hour |
|---|---|---|---|
| January | 9 h 18 min | 25° | 64 min |
| February | 10 h 24 min | 33° | 58 min |
| March | 11 h 48 min | 44° | 55 min |
| April | 13 h 24 min | 56° | 56 min |
| May | 14 h 42 min | 65° | 61 min |
| June | 15 h 24 min | 70° | 65 min |
| July | 15 h 6 min | 68° | 63 min |
| August | 13 h 54 min | 60° | 58 min |
| September | 12 h 24 min | 49° | 55 min |
| October | 10 h 54 min | 37° | 57 min |
| November | 9 h 36 min | 28° | 62 min |
| December | 9 h 0 min | 23° | 67 min |
Scores are capped by dealbreakers — heavy rain, dangerous wind, thick fog or hazardous UV pull a day down no matter how pleasant the rest of the numbers look. Forecast data is Open-Meteo; solar and lunar values are computed for Siena's own coordinates and time zone. Full details on the methodology page.