by Artyom

That is info on weather as recorded in Red Army military situation reports:

Stalingrad Front - area east and south of Stalingrad
Don Front - north-west of Stalingrad from 1 January 1942 - all area around Stalingrad.

29.11 South-West Front – continuous cloudiness, occasional snowfall, temperature +3°C
30.11 Stalingrad Front – cloudiness at low and medium heights, 1000-1500 meters, temperature 0°C. Drifting of ice on Volga.
1.12 Stalingrad Front – cloudiness at low and medium heights, temperature °C.
3.12 Stalingrad Front – continuous cloudiness, temperature °C
4.12 Stalingrad Front – continuous low cloudiness, slight wind, temperature °C
5.12 Stalingrad Front – continuous cloudiness, wet snow, temperature from 0 to -2°C
6.12 Stalingrad Front – continuous low cloudiness, slight rain with snow, temperature from 0 to +2°C
7.12 Staligrad Front - continuous low cloudiness, temperature from -2 to -5°C
8.12 Stalingrad Front – low cloudiness, snowfall and rain, temperature from 0 to -2°C
9.12 Stalingrad Front - continuous low cloudiness, temperature from 0 to -2°C
10.12 Stalingrad Front – cloudiness 2-4 points, north-west wind 4-7 m/s, temperaturefrom -5 to -8°C
11.12 Don Front – cloudiness 4-8 points, temperature from -6 to -9°C. Stalingrad Front – continuous cloudiness, temperature -6°C
12.12 Don Front – cloudiness 2 points, temperature from -3 to -4 °C. Stalingrad Front – cloudiness 2 points, temperature from -2 to -5°C
13.12 Don Front - clear, temperature from -3 to -8°C. Stalingrad Front – clear, temperature from 0 to -3°C
14.12 Don Front – cloudiness 10 points, temperature from +1 to -1°C. Don Front – cloudiness 10 points, temperature 0 to +2°C
15.12 Don Front – continuous cloudiness, temperature from +2 to -2°C. Stalingrad Front – continuous cloudiness, temperature +2°C
16.12 Don Front – cloudiness up to 10 points, occasional fog, temperature -5°C. Stalingrad Front – continuous cloudiness, temperature - 7°C
17.12 Don Front – clear, temperature from -13 to -18°C. Stalingrad Front – clear, temperature -12°C
18.12 Stalingrad Front – clear, temperature from -8 to -10°C
19.12 Don Front – cloudiness 6-10 points, temperature from -4 to -10°C. Stalingrad Front – cloudiness 8 points at 1000-1500 meters, temperature from -6 to -8°C
20.12 Don Front – cloudiness 7-10 points, temperature from -5 to -9°C. Stalingrad Front – continuous cloudiness at 1000-1500 meters, temperature from -3 to -6°C
21.12 Don Front – cloudiness 10 points, temperature from -6 to -15°C. Stalingrad Front – cloudy, temperature -5°C
22.12 Stalingrad Front – low clouds, temperature -2°C
23.12 Don Front – cloudiness 10 points, snowfall, temperature from -1 to -6°C. Stalingrad Front – continuous low cloudiness, temperature -3°C
24.12 Don Front – cloudiness 10 points, fog, temperature from -3 to -5°C. Stalingrad Front – continuous low cloudiness, occasional slight snowfall, temperature from -3 to -6°C
25.12 Don Front – cloudiness 6-10 points, clear in some places, temperature from -13 to -20°C. Stalingrad Front – cloudiness diminishing to completely clear sky, temperature -6°C
26.12 Don Front – clear, temperature from -15 to -19°C. Don Front – clear, temperature from -11 to -17°C
27.12 Don Front – cloudiness 5-7 points, temperature from -13 to -21°C. Stalingrad – diminishing cloudiness, temperature from -12 to -4°C
28.12 Don Front – clear, temperature from -11 to -20°C. Stalingrad Front – clear, from -6 to -8°C
29.12 Don Front – clear, temperature from -10 to -19°C. Stalingrad Front – clear, temperature -10°C
30.12 Don Front – cloudiness 10 points, temperature from -8 to -14°C. Stalingrad Front – on the northern sector continuous cloudiness, temperature from -10 to -12°C. On the southern sector – clear, temperature from -1 to -2°C
31.12 Don Front – cloudiness 10 points, occasional snowfall, temperature from -4 to -5°C. Stalingrad Front – clear, temperature from -6 to -8°C
1.1 Don Front – cloudiness 10 points, temperature from -2 to -5°C
2.1 Don Front – cloudiness 10 points, temperature from +2 to -2°C
3.1 Don Front – cloudiness 9-10 points, temperature from -2 to -6°C
4.1 Don Front – cloudiness 5-10 points, temperature from -6 to -11°C
5.1 Don Front – cloudiness 3-5 points, temperature from -10 to -18°C
6.1 Don Front – cloudiness 10 points, occasional snowfall, temperature from -10 to -17°C
7.1 Don Front – cloudiness 5-10 points, haze, temperature from -6 to -12°C
8.1 Don Front – cloudiness 8-10 points, blizzards in some places, temperature from 0 to -3°C
9.1 Don Front – cloudiness 10 points, fog, temperature from -3 to -6°C
10.1 Don Front – cloudiness 7-10 points, temperature from -2 to -5°C
11.1 Don Front – cloudiness 10 points, temperature from -1 to -7°C
12.1 Don Front – cloudiness 3-10 points, snowfall in places, temperature from -10 to -19°C
13.1 Don Front – cloudiness 8-10 points, temperature from -10 to -18°C
14.1 Don Front – cloudiness 9-10 points, occasional snowfall, temperature from -16 to -25°C
15.12 Don Front - clear, temperature from -23 to -28°C
16.12 Don Front - clear, temperature from -22 to -32°C
17.12 Don Front – clear, temperature -20°C
18.12 Don Front – clear, temperature from -17 to -28°C
19.12 Don Front - cloudiness 10 points, temperature from -10 to -19°C
20.12 Don Front – cloudiness 10 points, temperature from -1 to -14°C
21.12 Don Front – cloudiness 10 points, temperature from -8 to -13°C
22.12 Don Front – cloudiness 10 points, occasional snowfall, temperature from -6 to -13°C
23.12 Don Front – cloudiness 10 points, slight snowfall, haze, temperature from -11 to -20°C
24.1 Don Front – low cloudiness, temperature from 0 to -7°C
25.1 Don Front – clear, temperature from -19 to -25°C
26.1 Don Front – clear, temperature from -13 to -20°C
27.1 Don Front – clear, slight snowfall, occasional fog, temperature from -16 to -27°C
28.1 Don Front – clear, temperature from -14 to -28°C
29.1 Don Front – cloudiness 9-10 points, temperature from -13 to -23°C
30.1 Don Front – cloudiness 9-10 points, temperature from -12 to -24°C
31.1 Don Front – temperature from -5 to -18°C
1.2 Don Front – cloudiness 6-10 points, occasionally clear, temperature from -13 to -22°C

Sources used

Stalingradskaya bitva, Vol.2, OLMA-PRESS, Moscow, 2002