Weather in Siena in May 2026
Mon
Tue
Wed
Thu
Fri
Sat
Sun
1 +18° +7°
30% · 6.5 East
768 mmHg
2 +20° +7°
38% · 2.5 East-North-East
767 mmHg
3 +22° +8°
42% · 3.5 West
765 mmHg
4 +17° +11°
55% · 4.5 South-South-West
764 mmHg
5 +14° +11°
97% · 3.5 South-South-East
761 mmHg
6 +18°
75% · 8.5 South-South-West
758 mmHg
7 +20° +12°
55% · 3.5 South-South-West
761 mmHg
8 +19°
63% · 3.5 East
760 mmHg
9 +21° +11°
47% · 1.5 East-South-East
763 mmHg
10 +14° +13°
94% · 2.5 South
761 mmHg
11 +19° +14°
67% · 7.5 South-South-West
757 mmHg
12 +19°
58% · 10.5 West
755 mmHg
13 +16° +9°
52% · 6.5 West-North-West
755 mmHg
14 +18°
34% · 8.5 West
753 mmHg
15 +14° +12°
85% · 3.5 West-North-West
751 mmHg
16 +13°
74% · 7.5 West-North-West
753 mmHg
17 +19°
42% · 4.5 South
761 mmHg
18 +20° +9°
50% · 4.5 West-North-West
762 mmHg
19 +18° +11°
63% · 3.5 North-West
763 mmHg
20 +23° +12°
42% · 4.5 East
764 mmHg
21 +26° +13°
41% · 2.5 East
768 mmHg
22 +24° +14°
42% · 3.5 East
769 mmHg
23 +25° +15°
41% · 6.5 East
768 mmHg
24 +26° +15°
35% · 6.5 East-North-East
768 mmHg
25 +30°
38% · 6.5 East
770 mmHg
26 +30° +18°
37% · 2.5 East
769 mmHg
27 +27°
43% · 6.5 West-North-West
765 mmHg
28 +26° +16°
41% · 5.5 North-West
764 mmHg
29 +28°
43% · 5.5 South
765 mmHg
30 +28° +16°
35% · 3.5 West
764 mmHg
31 +28° +17°
38% · 5.5 West-North-West
761 mmHg
Temperature change in Siena, Italy in May 2026
Detailed daily forecast for Siena in May 2026
Early May
- 1 May Few clouds+18°+7°
- 2 May Scattered clouds+20°+7°
- 3 May Clear sky+22°+8°
- 4 May Light rain+17°+11°
- 5 May Overcast+14°+11°
- 6 May Light rain+18°—
- 7 May Overcast+20°+12°
- 8 May Light rain+19°—
- 9 May Few clouds+21°+11°
- 10 May Overcast+14°+13°
Mid-May 2026
- 11 May Rain+19°+14°
- 12 May Clear sky+19°—
- 13 May Rain+16°+9°
- 14 May Light rain+18°—
- 15 May Rain+14°+12°
- 16 May Light rain+13°—
- 17 May Scattered clouds+19°—
- 18 May Overcast+20°+9°
- 19 May Scattered clouds+18°+11°
- 20 May Clear sky+23°+12°
Late May in Siena
- 21 May Scattered clouds+26°+13°
- 22 May Few clouds+24°+14°
- 23 May Clear sky+25°+15°
- 24 May Scattered clouds+26°+15°
- 25 May Scattered clouds+30°—
- 26 May Few clouds+30°+18°
- 27 May Clear sky+27°—
- 28 May Overcast+26°+16°
- 29 May Light rain+28°—
- 30 May Few clouds+28°+16°
- 31 May Scattered clouds+28°+17°
Temperature in Siena in May 2026
What is the highest temperature in Siena in May 2026?
The highest temperature in Siena in May 2026 is +32°C, recorded on 25 May.
What is the lowest temperature in Siena in May 2026?
The lowest temperature in Siena in May 2026 is +7°C, recorded on 1 May.
What is the average temperature in Siena in May 2026?
The average temperature in Siena in May 2026 is +21°C during the day and +12°C at night.
Climate normals by month
average daytime and night-time temperature, Siena
Daytime Night-time
Wind rose for Siena: May
based on the month history over the last 10 years
Prevailing West — 16% of periods
Precipitation in Siena: May by year
days with precipitation
May in Siena over the last 10 years
average daytime temperature by year