Climate averages 1991–2020
Altamira weather
in January.
A hot, very wet month: the 8th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a hot month in Altamira: daytime highs average 28.9°C and nights cool to about 23.0°C. By daytime temperature it is the 8th warmest of the 12 months.
Expect about 248 mm of rain on roughly 28 days, which makes January a very wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 17 min on an average January day.
The nearest other city in this atlas is Breves (256 km away). In January its highs average 29.7°C, 0.8°C warmer than Altamira, with 250 mm of rain.
Among the 448 cities listed in Brazil, Altamira ranks joint 179th of 448 for the warmest January highs and joint 304th of 448 for the driest January (rainfall, lowest first). The mean January high of those 448 cities is 28.5°C; Altamira is 0.4°C warmer than that mean.
From January to February, average highs fall by 0.3°C to 28.5°C, and monthly rainfall rises from 248 mm to 276 mm.
The annual picture
January 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
Altamira climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 28.9°C23.0°C | 23.0°C | 248 | 28.1 | 12.312 h |
| February | 28.5°C22.9°C | 22.9°C | 276 | 26.8 | 12.212 h |
| March | 28.5°C22.9°C | 22.9°C | 328 | 29.1 | 12.112 h |
| April | 28.5°C23.0°C | 23.0°C | 280 | 28.2 | 12.012 h |
| May | 28.8°C23.1°C | 23.1°C | 190 | 26.1 | 12.012 h |
| June | 29.2°C22.9°C | 22.9°C | 71 | 16.5 | 11.912 h |
| July | 30.0°C22.8°C | 22.8°C | 46 | 10.1 | 12.012 h |
| August | 32.1°C23.5°C | 23.5°C | 31 | 7.1 | 12.012 h |
| September | 33.1°C24.2°C | 24.2°C | 34 | 7.0 | 12.112 h |
| October | 33.0°C24.5°C | 24.5°C | 60 | 11.1 | 12.212 h |
| November | 31.9°C24.3°C | 24.3°C | 100 | 14.9 | 12.312 h |
| December | 30.4°C23.8°C | 23.8°C | 152 | 21.9 | 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
January in nearby cities
- Breves in JanuaryBrazil · 256 kmHigh 29.7°C · Low 23.6°C · 250 mm rain
- Tucuruí in JanuaryBrazil · 287 kmHigh 29.2°C · Low 23.8°C · 350 mm rain
- Santarém in JanuaryBrazil · 290 kmHigh 28.6°C · Low 24.7°C · 409 mm rain
- Cametá in JanuaryBrazil · 319 kmHigh 29.5°C · Low 23.8°C · 299 mm rain
- Tailândia in JanuaryBrazil · 362 kmHigh 30.3°C · Low 23.0°C · 282 mm rain
- Santana in JanuaryBrazil · 370 kmHigh 28.8°C · Low 23.5°C · 229 mm rain
- Macapá in JanuaryBrazil · 382 kmHigh 28.5°C · Low 23.5°C · 274 mm rain
- São Félix do Xingu in JanuaryBrazil · 383 kmHigh 28.4°C · Low 22.4°C · 315 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 Altamira) is explained once on the Altamira year overview and on the Sources, method and limits page.