Climate averages 1991–2020
Arraiján weather
in September.
A warm, very wet month: the joint 8th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Arraiján: daytime highs average 27.9°C and nights cool to about 23.3°C. By daytime temperature it is the joint 8th warmest of the 12 months.
Expect about 269 mm of rain on roughly 30 days, which makes September a very wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 11 min on an average September day.
The nearest other city in this atlas is Panama City (15 km away). In September its highs average 28.5°C, 0.7°C warmer than Arraiján, with 257 mm of rain.
Among the 6 cities listed in Panama, Arraiján ranks joint 5th of 6 for the warmest September highs and 4th of 6 for the driest September (rainfall, lowest first). The mean September high of those 6 cities is 28.3°C; Arraiján is 0.5°C cooler than that mean.
From September to October, average highs fall by 0.3°C to 27.6°C, and monthly rainfall falls from 269 mm to 268 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
Arraiján climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.2°C23.5°C | 23.5°C | 29 | 8.4 | 11.712 h |
| February | 28.9°C23.4°C | 23.4°C | 15 | 4.7 | 11.812 h |
| March | 29.4°C23.6°C | 23.6°C | 18 | 5.4 | 12.112 h |
| April | 29.2°C24.0°C | 24.0°C | 87 | 15.6 | 12.312 h |
| May | 28.3°C23.9°C | 23.9°C | 234 | 28.9 | 12.513 h |
| June | 28.1°C23.6°C | 23.6°C | 255 | 29.2 | 12.613 h |
| July | 27.9°C23.5°C | 23.5°C | 280 | 30.2 | 12.613 h |
| August | 28.0°C23.5°C | 23.5°C | 276 | 30.6 | 12.412 h |
| September, selected | 27.9°C23.3°C | 23.3°C | 269 | 29.6 | 12.212 h |
| October | 27.6°C23.2°C | 23.2°C | 268 | 30.0 | 11.912 h |
| November | 27.3°C23.2°C | 23.2°C | 252 | 27.6 | 11.712 h |
| December | 27.6°C23.5°C | 23.5°C | 124 | 20.5 | 11.612 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
- Panama City in SeptemberPanama · 15 kmHigh 28.5°C · Low 24.1°C · 257 mm rain
- San Miguelito in SeptemberPanama · 22 kmHigh 29.0°C · Low 23.7°C · 257 mm rain
- Juan Díaz in SeptemberPanama · 25 kmHigh 28.5°C · Low 23.8°C · 257 mm rain
- Colón in SeptemberPanama · 55 kmHigh 28.3°C · Low 24.2°C · 300 mm rain
- David in SeptemberPanama · 312 kmHigh 27.9°C · Low 21.8°C · 460 mm rain
- Apartadó in SeptemberColombia · 352 kmHigh 29.4°C · Low 23.8°C · 199 mm rain
- Chigorodó in SeptemberColombia · 355 kmHigh 29.1°C · Low 22.6°C · 395 mm rain
- Montería in SeptemberColombia · 414 kmHigh 30.1°C · Low 23.4°C · 243 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 Arraiján) is explained once on the Arraiján year overview and on the Sources, method and limits page.