Climate averages 1991–2020
Bytom weather
in December.
A cold, moderately wet month: the 11th warmest and the 2nd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a cold month in Bytom: daytime highs average 2.1°C and nights cool to about -2.7°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 45 mm of rain on roughly 11 days, which makes December a moderately wet month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 8 h 07 min on an average December day.
The nearest other city in this atlas is Zabrze (11 km away). In December its highs average 2.3°C, about as warm as Bytom, with 45 mm of rain.
Among the 60 cities listed in Poland, Bytom ranks joint 43rd of 60 for the warmest December highs and joint 37th of 60 for the driest December (rainfall, lowest first). The mean December high of those 60 cities is 2.4°C; Bytom is 0.3°C cooler than that mean.
From December to January, average highs fall by 1.4°C to 0.7°C, and monthly precipitation rises from 45 mm to 46 mm.
The annual picture
December in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Bytom climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 0.7°C-4.6°C | -4.6°C | 46 | 11.4 | 8.69 h |
| February | 2.6°C-3.9°C | -3.9°C | 43 | 10.4 | 10.010 h |
| March | 7.4°C-0.8°C | -0.8°C | 52 | 11.8 | 11.812 h |
| April | 13.7°C3.8°C | 3.8°C | 50 | 10.1 | 13.814 h |
| May | 18.1°C8.9°C | 8.9°C | 80 | 13.9 | 15.415 h |
| June | 21.3°C12.6°C | 12.6°C | 82 | 13.2 | 16.316 h |
| July | 23.3°C14.6°C | 14.6°C | 98 | 14.0 | 16.016 h |
| August | 23.3°C14.4°C | 14.4°C | 71 | 11.3 | 14.515 h |
| September | 18.3°C10.4°C | 10.4°C | 71 | 11.1 | 12.713 h |
| October | 12.9°C6.1°C | 6.1°C | 54 | 10.0 | 10.811 h |
| November | 7.2°C1.7°C | 1.7°C | 50 | 10.1 | 9.19 h |
| December, selected | 2.1°C-2.7°C | -2.7°C | 45 | 10.7 | 8.18 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
December in nearby cities
- Zabrze in DecemberPoland · 11 kmHigh 2.3°C · Low -2.5°C · 45 mm rain
- Katowice in DecemberPoland · 12 kmHigh 2.2°C · Low -2.6°C · 45 mm rain
- Sosnowiec in DecemberPoland · 14 kmHigh 2.3°C · Low -2.5°C · 45 mm rain
- Gliwice in DecemberPoland · 19 kmHigh 2.6°C · Low -2.2°C · 45 mm rain
- Dąbrowa Górnicza in DecemberPoland · 19 kmHigh 2.2°C · Low -2.6°C · 45 mm rain
- Mysłowice in DecemberPoland · 23 kmHigh 2.3°C · Low -2.6°C · 45 mm rain
- Tychy in DecemberPoland · 24 kmHigh 2.3°C · Low -2.7°C · 45 mm rain
- Jaworzno in DecemberPoland · 29 kmHigh 1.9°C · Low -3.0°C · 45 mm precipitation
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Bytom) is explained once on the Bytom year overview and on the Sources, method and limits page.
Katowice, Sosnowiec and Tychy lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.