Climate averages 1991–2020
Acharnés weather
in September.
A hot, fairly dry month: the 4th warmest and the 4th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Acharnés: daytime highs average 28.4°C and nights cool to about 18.0°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 15 mm of rain on roughly 3 days, which makes September a fairly dry month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 28 min on an average September day.
The nearest other city in this atlas is Khalándrion (9 km away). In September its highs average 27.8°C, 0.5°C cooler than Acharnés, with 15 mm of rain.
Among the 11 cities listed in Greece, Acharnés ranks joint 2nd of 11 for the warmest September highs and joint 2nd of 11 for the driest September (rainfall, lowest first). The mean September high of those 11 cities is 27.4°C; Acharnés is 1.0°C warmer than that mean.
From September to October, average highs fall by 5.2°C to 23.2°C, and monthly rainfall rises from 15 mm to 27 mm.
The annual picture
September in context
Monthly rainfall
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
Acharnés climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 11.7°C4.5°C | 4.5°C | 52 | 7.3 | 9.810 h |
| February | 12.7°C4.7°C | 4.7°C | 47 | 7.2 | 10.811 h |
| March | 15.7°C6.6°C | 6.6°C | 49 | 6.4 | 11.912 h |
| April | 20.0°C9.7°C | 9.7°C | 29 | 5.4 | 13.213 h |
| May | 25.5°C14.5°C | 14.5°C | 23 | 4.9 | 14.214 h |
| June | 30.6°C18.9°C | 18.9°C | 11 | 2.5 | 14.815 h |
| July | 32.8°C21.2°C | 21.2°C | 6.4 | 1.3 | 14.515 h |
| August | 32.6°C21.2°C | 21.2°C | 4.4 | 1.1 | 13.614 h |
| September, selected | 28.4°C18.0°C | 18.0°C | 15 | 2.5 | 12.512 h |
| October | 23.2°C14.3°C | 14.3°C | 27 | 3.8 | 11.211 h |
| November | 17.6°C10.2°C | 10.2°C | 45 | 6.6 | 10.210 h |
| December | 13.0°C6.3°C | 6.3°C | 58 | 7.8 | 9.610 h |
Rainfall is the average of the 30 separate monthly totals. A rain 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
- Khalándrion in SeptemberGreece · 9 kmHigh 27.8°C · Low 18.3°C · 15 mm rain
- Athens in SeptemberGreece · 11 kmHigh 28.3°C · Low 19.0°C · 15 mm rain
- Piraeus in SeptemberGreece · 17 kmHigh 28.4°C · Low 19.6°C · 15 mm rain
- Glyfáda in SeptemberGreece · 25 kmHigh 28.4°C · Low 20.1°C · 11 mm rain
- Volos in SeptemberGreece · 158 kmHigh 25.8°C · Low 19.6°C · 63 mm rain
- Pátra in SeptemberGreece · 176 kmHigh 26.5°C · Low 17.7°C · 51 mm rain
- Lárisa in SeptemberGreece · 206 kmHigh 27.4°C · Low 17.4°C · 49 mm rain
- Ayvalık in SeptemberTurkey · 291 kmHigh 25.4°C · Low 19.6°C · 26 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 Acharnés) is explained once on the Acharnés year overview and on the Sources, method and limits page.
Athens, Piraeus and Khalándrion lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.