January in Siena — middling scores, decent value
Trade-offs · 6.6/10Expect 6°C (43°F) in January. A good month for city streets, viewpoints and long meals; leave swimming for another season.
Budget for roughly 56 mm of rain this month — a flexible day or two helps — with about 20 days with 6+ hours of sunshine and 9.4 hours of daylight to work around it.
That is 6.6/10 on the same scale — 11th of 12 months, versus 9.3/10 for the best month here.
Budget for mid-season pricing, and crowds are light for this destination.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a packable rain layer.
If your dates are flexible, June is materially better in Siena — 2.7 points higher on the same scale.
February in Siena: strong conditions, 9th of 12
Good · 7.1/10Expect 7°C (45°F) in February. A good month for city streets, viewpoints and long meals; leave swimming for another season.
Budget for roughly 62 mm of rain this month — a flexible day or two helps — with about 21 days with 6+ hours of sunshine and 10.5 hours of daylight to work around it.
That is 7.1/10 on the same scale — 9th of 12 months, versus 9.3/10 for the best month here.
Expect mid-season pricing, and crowds are light for this destination.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a packable rain layer.
If your dates are flexible, June is materially better in Siena — 2.2 points higher on the same scale.
March holds up well in Siena — 7th best month
Good · 7.5/10March averages 9°C (49°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.
Rainfall runs 78 mm, so plan one flexible day in three; you still get about 26 days with 6+ hours of sunshine and 12 hours of daylight.
It scores 7.5/10 here, 7th of 12 months, against 9.3/10 in the destination's best month.
Plan for mid-season pricing, with crowds are moderate.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a packable rain layer.
Flexible dates? June scores 1.8 points higher here — enough to change the trip.
April holds up well in Siena — 3rd best month
Good · 8.3/10Expect 12°C (53°F) in April. A good month for city streets, viewpoints and long meals; leave swimming for another season.
Budget for roughly 73 mm of rain this month — a flexible day or two helps — with about 29 days with 6+ hours of sunshine and 13.4 hours of daylight to work around it.
That is 8.3/10 on the same scale — 3rd of 12 months, versus 9.3/10 for the best month here.
Expect mid-season pricing, and crowds are moderate.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a packable rain layer.
May in Siena: strong conditions, 2nd of 12
Good · 8.4/10May averages 17°C (63°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Rainfall runs 93 mm, so plan one flexible day in three; you still get about 28 days with 6+ hours of sunshine and 14.7 hours of daylight.
It scores 8.4/10 here, 2nd of 12 months, against 9.3/10 in the destination's best month.
Figure on mid-season pricing, with crowds are moderate.
Pack layers you can shed by midday plus one warm layer for the evening, a packable rain layer.
June: the best month of the year in Siena
Best window · 9.3/10At 22°C (72°F) this is comfortable city weather in June, with sightseeing easiest before lunch and after the afternoon peak.
Budget for roughly 54 mm of rain this month — a flexible day or two helps — with about 29 days with 6+ hours of sunshine and 15.3 hours of daylight to work around it.
On our climate-comfort scale this is the top-ranked month of the year for Siena at 9.3/10 — the reference point every other month on this page is measured against.
Budget for peak pricing, and crowds are moderate. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Pack light clothing, a hat and real sun protection, a packable rain layer.
July holds up well in Siena — 6th best month
Good · 7.9/10Days in July average 27°C (80°F) — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
At just 8 mm for the month, rain will not shape your plans; you get about 31 days with 6+ hours of sunshine and 15 hours of daylight.
That is 7.9/10 on the same scale — 6th of 12 months, versus 9.3/10 for the best month here.
Expect mid-season pricing, and crowds are moderate.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.
August holds up well in Siena — 5th best month
Good · 8.1/10August averages 26°C (78°F) — pleasant for mornings and evenings on foot in the city, with a midday break when the sun is strongest.
Rainfall runs 46 mm, so plan one flexible day in three; you still get about 31 days with 6+ hours of sunshine and 13.9 hours of daylight.
It scores 8.1/10 here, 5th of 12 months, against 9.3/10 in the destination's best month.
Plan for mid-season pricing, with crowds are moderate.
Pack light clothing, a hat and real sun protection, a packable rain layer.
September holds up well in Siena — 4th best month
Good · 8.2/10September averages 20°C (68°F) — pleasant for mornings and evenings on foot in the city, with a midday break when the sun is strongest.
Monthly rainfall reaches 101 mm — wet for this destination — but about 27 days with 6+ hours of sunshine still break through, so keep one indoor fallback in the plan.
It scores 8.2/10 here, 4th of 12 months, against 9.3/10 in the destination's best month.
Plan for mid-season pricing, with crowds are moderate.
Pack light clothing, a hat and real sun protection, a proper rain shell rather than an umbrella.
October in Siena — reliably good (8th best month)
Good · 7.4/10Temperatures hover around 17°C (63°F) — the kind of month where neither heat nor cold forces the schedule.
119 mm of rain makes this a wet month here, though with about 26 days with 6+ hours of sunshine there is still bright weather between the fronts.
That is 7.4/10 on the same scale — 8th of 12 months, versus 9.3/10 for the best month here.
Expect low-season pricing, and crowds are light for this destination.
Pack layers you can shed by midday plus one warm layer for the evening, a proper rain shell rather than an umbrella.
If your dates are flexible, June is materially better in Siena — 1.9 points higher on the same scale.
November in Siena: mixed conditions, plan around the weather
Trade-offs · 6.8/10Expect 10°C (51°F) in November. A good month for city streets, viewpoints and long meals; leave swimming for another season.
Budget for roughly 96 mm of rain this month — a flexible day or two helps — with about 22 days with 6+ hours of sunshine and 9.7 hours of daylight to work around it.
That is 6.8/10 on the same scale — 10th of 12 months, versus 9.3/10 for the best month here.
Expect low-season pricing, and crowds are light for this destination.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a packable rain layer.
If your dates are flexible, June is materially better in Siena — 2.5 points higher on the same scale.
December in Siena — middling scores, decent value
Trade-offs · 6/10December averages 7°C (45°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.
Rainfall runs 84 mm, so plan one flexible day in three; you still get about 19 days with 6+ hours of sunshine and 9 hours of daylight.
It scores 6/10 here, 12th of 12 months, against 9.3/10 in the destination's best month.
Figure on low-season pricing, with crowds are light for this destination.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a packable rain layer.
Flexible dates? June scores 3.3 points higher here — enough to change the trip.
