Climate averages 1991–2020
Sullana weather
in December.
A hot, fairly dry month: the 6th warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in Sullana: daytime highs average 31.6°C and nights cool to about 20.0°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 18 mm of rain on roughly 4 days, which makes December a fairly dry month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 24 min on an average December day.
The nearest other city in this atlas is Piura (31 km away). In December its highs average 31.1°C, about as warm as Sullana, with 21 mm of rain.
Among the 24 cities listed in Peru, Sullana ranks 1st of 24 for the warmest December highs and 11th of 24 for the driest December (rainfall, lowest first). The mean December high of those 24 cities is 24.6°C; Sullana is 7.0°C warmer than that mean.
From December to January, average highs rise by 1.2°C to 32.8°C, and monthly rainfall rises from 18 mm to 35 mm.
The annual picture
December 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
Sullana climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 32.8°C21.9°C | 21.9°C | 35 | 5.2 | 12.412 h |
| February | 32.5°C23.2°C | 23.2°C | 75 | 9.9 | 12.312 h |
| March | 32.8°C23.2°C | 23.2°C | 113 | 11.2 | 12.112 h |
| April | 32.6°C22.0°C | 22.0°C | 42 | 6.5 | 12.012 h |
| May | 31.7°C20.4°C | 20.4°C | 4.9 | 1.8 | 11.912 h |
| June | 29.9°C18.7°C | 18.7°C | 1.8 | 0.8 | 11.812 h |
| July | 28.7°C17.5°C | 17.5°C | 0.6 | 0.2 | 11.912 h |
| August | 28.6°C17.0°C | 17.0°C | 0.2 | 0.1 | 12.012 h |
| September | 29.2°C17.3°C | 17.3°C | 1.3 | 0.4 | 12.112 h |
| October | 29.8°C17.7°C | 17.7°C | 2.5 | 0.9 | 12.212 h |
| November | 30.4°C18.3°C | 18.3°C | 6.9 | 1.8 | 12.312 h |
| December, selected | 31.6°C20.0°C | 20.0°C | 18 | 3.8 | 12.412 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
December in nearby cities
- Piura in DecemberPeru · 31 kmHigh 31.1°C · Low 20.0°C · 21 mm rain
- Talara in DecemberPeru · 74 kmHigh 26.9°C · Low 20.0°C · 14 mm rain
- Tumbes in DecemberPeru · 152 kmHigh 30.2°C · Low 22.3°C · 34 mm rain
- Loja in DecemberEcuador · 193 kmHigh 21.3°C · Low 14.7°C · 146 mm rain
- Chiclayo in DecemberPeru · 227 kmHigh 25.5°C · Low 19.2°C · 8.9 mm rain
- Cuenca in DecemberEcuador · 292 kmHigh 18.3°C · Low 11.5°C · 172 mm rain
- La Libertad in DecemberEcuador · 298 kmHigh 25.7°C · Low 21.7°C · 30 mm rain
- Eloy Alfaro in DecemberEcuador · 318 kmHigh 28.7°C · Low 22.6°C · 164 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 Sullana) is explained once on the Sullana year overview and on the Sources, method and limits page.