Tuscany Weather

Siena in September

Pleasant early autumn. Still warm enough for light clothing.

Shoulder Season

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September is part of Autumn

See the complete autumn weather guide

Weather Overview

Average conditions for Siena in September

Average High

26°C

79°F

Average Low

14°C

57°F

Precipitation

70mm

6 rainy days

Sunny Days

days

Humidity

66%

UV Index

Sunshine Hours

8h/day

What to Pack

Packing recommendations for September

Mix of summer and light layers, swimwear, light jacket for evenings.

Light to medium jacket

Layered clothing

Comfortable walking shoes

Umbrella

Light scarf

Warm sweater for evenings

Compare All Months

See weather patterns throughout the year in Siena

Jan

9°

1°

Feb

11°

2°

Mar

14°

4°

Apr

18°

7°

May

23°

11°

Jun

27°

15°

Jul

31°

18°

Aug

31°

18°

Sep

26°

14°

Oct

20°

10°

Nov

14°

5°

Dec

10°

2°

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Essentials for September weather in Italy.

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Planning Your Visit?

Compare crowds, prices, and events for each month to find the perfect time to visit Siena.

Best Time to Visit Siena Siena City Guide