Climate averages 1991–2020
Tumbes weather
by month.
See how the year changes. December has the highest average daily maximum; August has the lowest average monthly rainfall.
Long-term climate patterns, not a forecast for a particular trip.
Across the year Tumbes averages a daytime high of 29.6°C and a nighttime low of 22.0°C, with about 614 mm of rain on roughly 83 days. December is the warmest month (average high 30.2°C) and July the coolest (29.2°C). March is the wettest month with 167 mm; August is the driest with 1.1 mm.
The annual picture
A year in Tumbes
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 | 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
Nearby cities
- LojaEcuador · 146 kmHigh 21.0°C · Low 14.2°C · 1,310 mm rain a year
- TalaraPeru · 146 kmHigh 26.7°C · Low 19.9°C · 159 mm rain a year
- SullanaPeru · 152 kmHigh 30.9°C · Low 19.8°C · 302 mm rain a year
- La LibertadEcuador · 156 kmHigh 25.4°C · Low 21.8°C · 420 mm rain a year
- Eloy AlfaroEcuador · 168 kmHigh 28.0°C · Low 22.2°C · 2,699 mm rain a year
- CuencaEcuador · 177 kmHigh 17.7°C · Low 10.8°C · 1,499 mm rain a year
- PiuraPeru · 182 kmHigh 30.4°C · Low 19.8°C · 290 mm rain a year
- PortoviejoEcuador · 278 kmHigh 28.8°C · Low 22.2°C · 1,044 mm rain a year
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 limitsWhat do the high and low temperatures mean?
We average the daily maximum and daily minimum for each calendar month over 1991–2020. They are not record extremes, a forecast range or temperatures at a fixed time of day.
How is a rain day counted?
A local calendar day (standard time, UTC-5, no daylight saving) with at least 1 mm of total precipitation counts as one rain day. We count these for each year and month, then average across 30 years. The average does not predict which days will be wet.
Where do the numbers come from?
ERA5-Land (temperature) and ERA5 (precipitation) reanalysis from the Copernicus Climate Change Service, read from the Open-Meteo open-data archive. Temperature comes from the 0.1° model cell at -3.60°, -80.40° (7 km from the city centre), adjusted up by 0.2°C for the difference between the city's elevation (4 m) and the cell's (28 m). Rain comes from the 0.25° cell at -3.50°, -80.50°. These are model estimates, not weather-station readings; coast, hills and city streets can differ.
Does this page show sunshine, humidity or sea temperature?
No. The data used here contain air temperature and precipitation only. Daylight hours are calculated from the city's latitude (sunrise to sunset), not measured sunshine.