Average data for 10 years
1 December
Sunday
−2°
−3°
2 December
Monday
−1°
−3°
3 December
Tuesday
−1°
−3°
4 December
Wednesday
−2°
−2°
5 December
Thursday
−1°
−3°
6 December
Friday
−2°
−2°
7 December
Saturday
−2°
−3°
8 December
Sunday
−2°
−4°
9 December
Monday
−3°
−4°
10 December
Tuesday
−3°
−4°
11 December
Wednesday
−2°
−4°
12 December
Thursday
−2°
−3°
13 December
Friday
−4°
−4°
14 December
Saturday
−5°
−6°
15 December
Sunday
−5°
−7°
16 December
Monday
−5°
−6°
17 December
Tuesday
−6°
−6°
18 December
Wednesday
−4°
−6°
19 December
Thursday
−4°
−5°
20 December
Friday
−3°
−4°
21 December
Saturday
−4°
−5°
22 December
Sunday
−3°
−5°
23 December
Monday
−4°
−5°
24 December
Tuesday
−4°
−5°
25 December
Wednesday
−2°
−5°
26 December
Thursday
−2°
−3°
27 December
Friday
−3°
−4°
28 December
Saturday
−4°
−4°
29 December
Sunday
−5°
−5°
30 December
Monday
−4°
−6°
31 December
Tuesday
−4°
−6°
December in Ostashkov is the snowiest and the windiest month of the year. In December, the weather in Ostashkov is typically freezing. Average daily high temperature in December is about 3 degrees below zero. On average, Ostashkov has 22 snowy and 9 cloudy days in December. The snowfalls are usually moderate.