Climate averages 1991–2020
Tumbes weather
in September.
A hot, very dry month: the joint 9th warmest and the 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Tumbes: daytime highs average 29.3°C and nights cool to about 20.6°C. By daytime temperature it is the joint 9th warmest of the 12 months.
Expect about 6.0 mm of rain on roughly 2 days, which makes September a very dry month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 05 min on an average September day.
The nearest other city in this atlas is Loja (146 km away). In September its highs average 21.9°C, 7.5°C cooler than Tumbes, with 36 mm of rain.
Among the 24 cities listed in Peru, Tumbes ranks 5th of 24 for the warmest September highs and 14th of 24 for the driest September (rainfall, lowest first). The mean September high of those 24 cities is 23.3°C; Tumbes is 6.1°C warmer than that mean.
From September to October, average highs rise by 0.1°C to 29.4°C, and monthly rainfall rises from 6.0 mm to 9.6 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
Tumbes climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 30.0°C23.2°C | 23.2°C | 74 | 12.3 | 12.312 h |
| February | 29.5°C23.5°C | 23.5°C | 150 | 16.8 | 12.212 h |
| March | 29.6°C23.5°C | 23.5°C | 167 | 16.6 | 12.112 h |
| April | 29.7°C23.3°C | 23.3°C | 103 | 12.3 | 12.012 h |
| May | 29.7°C22.9°C | 22.9°C | 41 | 7.1 | 12.012 h |
| June | 29.3°C21.8°C | 21.8°C | 9.8 | 2.5 | 11.912 h |
| July | 29.2°C20.9°C | 20.9°C | 4.5 | 1.3 | 11.912 h |
| August | 29.3°C20.4°C | 20.4°C | 1.1 | 0.3 | 12.012 h |
| September, selected | 29.3°C20.6°C | 20.6°C | 6.0 | 1.8 | 12.112 h |
| October | 29.4°C20.9°C | 20.9°C | 9.6 | 2.8 | 12.212 h |
| November | 29.6°C21.1°C | 21.1°C | 15 | 3.7 | 12.312 h |
| December | 30.2°C22.3°C | 22.3°C | 34 | 5.8 | 12.312 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
- Loja in SeptemberEcuador · 146 kmHigh 21.9°C · Low 13.9°C · 36 mm rain
- Talara in SeptemberPeru · 146 kmHigh 24.6°C · Low 17.3°C · 1.2 mm rain
- Sullana in SeptemberPeru · 152 kmHigh 29.2°C · Low 17.3°C · 1.3 mm rain
- La Libertad in SeptemberEcuador · 156 kmHigh 23.9°C · Low 20.0°C · 8.9 mm rain
- Eloy Alfaro in SeptemberEcuador · 168 kmHigh 27.6°C · Low 20.8°C · 117 mm rain
- Cuenca in SeptemberEcuador · 177 kmHigh 18.1°C · Low 9.8°C · 62 mm rain
- Piura in SeptemberPeru · 182 kmHigh 28.4°C · Low 17.3°C · 2.1 mm rain
- Portoviejo in SeptemberEcuador · 278 kmHigh 28.9°C · Low 21.3°C · 20 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 Tumbes) is explained once on the Tumbes year overview and on the Sources, method and limits page.