Climate averages 1991–2020
Rybnik weather
in September.
A mild, moderately wet month: the 4th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a mild month in Rybnik: daytime highs average 18.8°C and nights cool to about 10.4°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 76 mm of rain on roughly 11 days, which makes September a moderately wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 40 min on an average September day.
The nearest other city in this atlas is Jastrzębie Zdrój (16 km away). In September its highs average 18.6°C, about as warm as Rybnik, with 76 mm of rain.
Among the 60 cities listed in Poland, Rybnik ranks joint 9th of 60 for the warmest September highs and joint 55th of 60 for the driest September (rainfall, lowest first). The mean September high of those 60 cities is 18.3°C; Rybnik is 0.5°C warmer than that mean.
From September to October, average highs fall by 5.4°C to 13.5°C, and monthly rainfall falls from 76 mm to 57 mm.
The annual picture
September 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
Rybnik climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 1.4°C-4.0°C | -4.0°C | 47 | 11.1 | 8.69 h |
| February | 3.3°C-3.5°C | -3.5°C | 44 | 10.3 | 10.010 h |
| March | 7.9°C-0.6°C | -0.6°C | 52 | 12.0 | 11.812 h |
| April | 14.0°C3.8°C | 3.8°C | 51 | 10.3 | 13.714 h |
| May | 18.4°C8.8°C | 8.8°C | 85 | 13.4 | 15.415 h |
| June | 21.7°C12.6°C | 12.6°C | 89 | 12.8 | 16.316 h |
| July | 23.8°C14.6°C | 14.6°C | 105 | 13.6 | 15.916 h |
| August | 23.8°C14.4°C | 14.4°C | 75 | 11.3 | 14.514 h |
| September, selected | 18.8°C10.4°C | 10.4°C | 76 | 10.7 | 12.713 h |
| October | 13.5°C6.3°C | 6.3°C | 57 | 10.3 | 10.811 h |
| November | 7.8°C2.1°C | 2.1°C | 51 | 10.4 | 9.19 h |
| December | 2.7°C-2.2°C | -2.2°C | 46 | 10.6 | 8.28 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
September in nearby cities
- Jastrzębie Zdrój in SeptemberPoland · 16 kmHigh 18.6°C · Low 10.5°C · 76 mm rain
- Gliwice in SeptemberPoland · 24 kmHigh 18.9°C · Low 10.9°C · 72 mm rain
- Tychy in SeptemberPoland · 31 kmHigh 18.3°C · Low 10.2°C · 71 mm rain
- Zabrze in SeptemberPoland · 31 kmHigh 18.6°C · Low 10.6°C · 72 mm rain
- Ostrava in SeptemberCzechia · 35 kmHigh 18.7°C · Low 10.4°C · 82 mm rain
- Havířov in SeptemberCzechia · 36 kmHigh 18.3°C · Low 10.1°C · 88 mm rain
- Katowice in SeptemberPoland · 39 kmHigh 18.4°C · Low 10.4°C · 71 mm rain
- Bytom in SeptemberPoland · 39 kmHigh 18.3°C · Low 10.4°C · 71 mm rain
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 Rybnik) is explained once on the Rybnik year overview and on the Sources, method and limits page.
Jastrzębie Zdrój lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.