Weather in Siena in December 2026
Mon
Tue
Wed
Thu
Fri
Sat
Sun
1 +10° +3°
70% · 2 East
760 mmHg
2 +9° +2°
70% · 2 East-South-East
760 mmHg
3 +9° +3°
70% · 3 East
760 mmHg
4 +9° +1°
71% · 3 East
760 mmHg
5 +9° +3°
71% · 3 East
760 mmHg
6 +9° +2°
71% · 3 East-South-East
760 mmHg
7 +9° +2°
71% · 3 East
760 mmHg
8 +9° +3°
71% · 3 East
760 mmHg
9 +8° +2°
71% · 3 East
760 mmHg
10 +9° +4°
74% · 3 East
761 mmHg
11 +8° +3°
74% · 3 East-South-East
761 mmHg
12 +7° +3°
74% · 3 East
762 mmHg
13 +7° +3°
74% · 3 East
762 mmHg
14 +9° +4°
74% · 3 East
762 mmHg
15 +10° +3°
74% · 3 East-South-East
762 mmHg
16 +9° +4°
74% · 3 East
762 mmHg
17 +10° +3°
75% · 3 East
762 mmHg
18 +10° +3°
75% · 3 East
762 mmHg
19 +10° +3°
75% · 3 East-South-East
762 mmHg
20 +8° +4°
77% · 4 East-South-East
763 mmHg
21 +9° +5°
78% · 4 East
763 mmHg
22 +10° +4°
78% · 4 East
763 mmHg
23 +10° +5°
78% · 4 East
763 mmHg
24 +10° +6°
78% · 4 East-South-East
763 mmHg
25 +9° +4°
78% · 4 East
764 mmHg
26 +8° +4°
78% · 4 East
764 mmHg
27 +8° +3°
78% · 4 East
764 mmHg
28 +8° +3°
78% · 4 East-South-East
764 mmHg
29 +8° +3°
79% · 4 East-South-East
764 mmHg
30 +10° 0°
65% · 2 East
757 mmHg
31 +9° +2°
65% · 2 East
757 mmHg
Temperature change in Siena, Italy in December 2026
Detailed daily forecast for Siena in December 2026
Early December
- 1 December Few clouds+10°+3°
- 2 December Few clouds+9°+2°
- 3 December Few clouds+9°+3°
- 4 December Few clouds+9°+1°
- 5 December Few clouds+9°+3°
- 6 December Few clouds+9°+2°
- 7 December Few clouds+9°+2°
- 8 December Few clouds+9°+3°
- 9 December Scattered clouds+8°+2°
- 10 December Scattered clouds+9°+4°
Mid-December 2026
- 11 December Scattered clouds+8°+3°
- 12 December Scattered clouds+7°+3°
- 13 December Scattered clouds+7°+3°
- 14 December Scattered clouds+9°+4°
- 15 December Scattered clouds+10°+3°
- 16 December Scattered clouds+9°+4°
- 17 December Scattered clouds+10°+3°
- 18 December Scattered clouds+10°+3°
- 19 December Scattered clouds+10°+3°
- 20 December Overcast+8°+4°
Late December in Siena
- 21 December Overcast+9°+5°
- 22 December Overcast+10°+4°
- 23 December Overcast+10°+5°
- 24 December Overcast+10°+6°
- 25 December Overcast+9°+4°
- 26 December Overcast+8°+4°
- 27 December Overcast+8°+3°
- 28 December Overcast+8°+3°
- 29 December Overcast+8°+3°
- 30 December Clear sky+10°0°
- 31 December Clear sky+9°+2°
Temperature in Siena in December 2026
What is the highest temperature in Siena in December 2026?
The highest temperature in Siena in December 2026 is +12°C, recorded on 1 December.
What is the lowest temperature in Siena in December 2026?
The lowest temperature in Siena in December 2026 is 0°C, recorded on 30 December.
What is the average temperature in Siena in December 2026?
The average temperature in Siena in December 2026 is +9°C during the day and +3°C at night.
Climate normals by month
average daytime and night-time temperature, Siena
Daytime Night-time
Wind rose for Siena: December
based on the month history over the last 10 years
Prevailing East — 17.3% of periods
Precipitation in Siena: December by year
days with precipitation
December in Siena over the last 10 years
average daytime temperature by year