Cuiabá weather in December
In December, Cuiabá has daytime highs averaging 31 °C, nights around 24 °C, with 24 wet days. Figures are 1991–2020 climate normals.
- 30.9°C Average high
- 23.9°C Average low
- 24days Wet days
- 210mm Rainfall
- 13h Daylight
Daily temperatures through December
How December develops
Averages for the first, middle and last part of the month, from daily 1991–2020 normals. Chance of rain is the share of years in which that calendar day recorded more than 1 mm.
| Days | Avg high | Avg low | Chance of rain |
|---|---|---|---|
| 1–10 December | 30.8 °C | 24.0 °C | 80 % |
| 11–20 December | 30.7 °C | 23.7 °C | 77 % |
| 21–31 December | 31.0 °C | 23.9 °C | 77 % |
What to expect
| Measure | Typical December | Share of the month |
|---|---|---|
| Days above 25 °C | 31 of 31 | 100 % |
| Days above 30 °C | 21 of 31 | 69 % |
| Days below 0 °C | 0 of 31 | 0 % |
| Days with more than 1 mm rain | 24 of 31 | 78 % |
Conditions in December
| Measure | Average |
|---|---|
| Mean temperature | 27 °C |
| Record high (1991–2020) | 36 °C |
| Record low (1991–2020) | 18 °C |
| Relative humidity | 79 % |
| Wind speed | 12 km/h |
| Cloud cover | 81 % |
Where Cuiabá ranks in December
| Ranking | Position | Value |
|---|---|---|
| The warmest places in South America in December | 27thof 50 | 31 °C |
December compared with the months around it
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| January | 30.5 °C | 242 mm | 82 % |
| February | 30.4 °C | 220 mm | 82 % |
| October | 33.1 °C | 128 mm | 65 % |
| November | 31.5 °C | 174 mm | 76 % |
| December | 30.9 °C | 210 mm | 81 % |
See all twelve months for Cuiabá
- December is the 5th warmest month here.
- It is the 10th driest month of the year.
- It ranks 10th for least cloud cover.
- Days last about 13 hours from sunrise to sunset.
- It rains on 24 of 31 days — 78 % of the month.
- Nights are about 7.0 °C cooler than the middle of the day.
- The hottest December day on record since 1991 reached 36 °C, 5.3 °C above the usual daytime high.
Nearby destinations in December
| Destination | Avg high | Wet days |
|---|---|---|
| Cuiabá | 31 °C | 24 |
| Várzea Grande | 31 °C | 23 |
| Rondonópolis | 31 °C | 24 |
| Sinop | 29 °C | 27 |
| Rio Verde | 28 °C | 26 |
QuestionsDecember in Cuiabá, answered
How warm is Cuiabá in December?
Daily highs average 31 °C and nights fall to about 24 °C, a spread of 7.0 °C between afternoon and dawn. That makes December the 4th warmest month of the year here.
Does it rain much in Cuiabá in December?
December averages 210 mm of rain, spread over about 24 of the 31 days — 78 % of the month. Cloud cover averages 81 % of the sky.
How long are the days in December?
Cuiabá averages 13 hours between sunrise and sunset in December. Day length is computed from latitude and date, so it is exact rather than modelled — but it says nothing about how much of that time is sunny.
Data sources and method
- ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
- Open-Meteo — Open-Meteo.com. CC BY 4.0
- NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
- GeoNames — GeoNames.org. CC BY 4.0
- Normal period
- 1991–2020
- Dataset version
- era5-1991-2020-scores1.1
- Last processed
Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: daylight hours, beach and comfort scores, monthly rankings, threshold day counts, chance of a wet day by date, ten-day averages within the month. Full formulas are on the methodology page.
Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.