Monthly weather overview

Siena monthly weather overview Italy · 시에나

A quick, year-round overview of monthly and seasonal weather in Siena. Use this page to get a feel for which months and seasons match your travel style.

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Siena weather at a glance

• Siena sits on a hill in inland Tuscany, so evenings can cool down faster than nearby lower areas. A day can feel hot at noon and noticeably cooler after sunset.
• A common feel is: hot, sunny summer (Jun–Aug), cool and occasionally rainy winter (Nov–Feb), and shoulder seasons (Mar–May, Sep–Oct) that are great for walking but swing with rain and day–night gaps.
• It’s a walking city with slopes and steps. Midday sun can build fatigue, while evening breeze can lower comfort—one light layer often stabilizes the day.
• On rainy days, wetness plus cool air can be the main friction. A compact umbrella and waterproof pouch help.
• Instead of calling a season ‘good’ or ‘bad,’ planning by time-of-day and wet vs dry conditions usually works best.

Dec · Jan · Feb

Winter (cool + rain): damp cool and evening chill matter most

Avg low 1–4°C / high 8–12°C · Rainy days: 6–11 / 45–95 mm

• Even if midday feels okay, evenings can cool quickly.
• Rain can create a persistent damp chill.
• Breeze can drop perceived temperature a notch.

Suggested outfits

· Jacket/coat + knit layers
· Umbrella/waterproof pouch
· Scarf option

A note for travelers

In Siena winter, comfort is often decided after sunset.

Mar · Apr · May · Sep · Oct · Nov

Shoulder seasons (walkable): warm days, cooler evenings, with rain swings

Avg low 7–15°C / high 14–24°C · Rainy days: 5–10 / 45–110 mm

• Light by day, a layer later—gaps are real.
• Rain can swing comfort cooler quickly.
• Sunny afternoons can feel warmer fast.

Suggested outfits

· T-shirt/long sleeve + light layer
· Compact umbrella
· Comfortable shoes

A note for travelers

If you dress only for midday, evenings can surprise you—especially on the hill.

Jun · Jul · Aug

Summer (hot + strong sun): hot at noon, often easier after sunset

Avg low 17–21°C / high 28–33°C (higher feel in sun) · Rainy days: 2–6 / 15–60 mm

• Midday sun can feel intense quickly.
• Evenings can feel noticeably easier with breeze and elevation.
• After showers, humidity can make heat feel heavier.

Suggested outfits

· Breathable/quick-dry clothing
· Hat/sunscreen/water
· Thin layer for evenings

A note for travelers

In summer, timing your walks matters more than chasing a perfect forecast number.

Want detailed monthly weather?

Pick a month below to see detailed average temperatures, rainfall, outfit ideas, and travel tips.

January February March April May June July August September October November December

Explore Siena

These pages are connected so you can compare conditions and decide for yourself.

Current weather

Forecasts for Siena

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Best time to visit

When it tends to fit

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What to wear

How people usually dress

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Climate

Heat, rain, seasonality

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Monthly hub

Jan–Dec at a glance

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