Climate averages 1991–2020
Altamira weather
in May.
A hot, very wet month: the 9th warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a hot month in Altamira: daytime highs average 28.8°C and nights cool to about 23.1°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 190 mm of rain on roughly 26 days, which makes May a very wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 58 min on an average May day.
The nearest other city in this atlas is Breves (256 km away). In May its highs average 29.2°C, about as warm as Altamira, with 286 mm of rain.
Among the 448 cities listed in Brazil, Altamira ranks joint 82nd of 448 for the warmest May highs and 418th of 448 for the driest May (rainfall, lowest first). The mean May high of those 448 cities is 25.3°C; Altamira is 3.5°C warmer than that mean.
From May to June, average highs rise by 0.4°C to 29.2°C, and monthly rainfall falls from 190 mm to 71 mm.
The annual picture
May 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 | 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, selected | 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
May in nearby cities
- Breves in MayBrazil · 256 kmHigh 29.2°C · Low 23.6°C · 286 mm rain
- Tucuruí in MayBrazil · 287 kmHigh 29.4°C · Low 24.0°C · 173 mm rain
- Santarém in MayBrazil · 290 kmHigh 28.3°C · Low 24.6°C · 365 mm rain
- Cametá in MayBrazil · 319 kmHigh 29.4°C · Low 24.0°C · 267 mm rain
- Tailândia in MayBrazil · 362 kmHigh 29.4°C · Low 23.0°C · 194 mm rain
- Santana in MayBrazil · 370 kmHigh 28.6°C · Low 23.6°C · 324 mm rain
- Macapá in MayBrazil · 382 kmHigh 28.4°C · Low 23.6°C · 357 mm rain
- São Félix do Xingu in MayBrazil · 383 kmHigh 29.1°C · Low 22.5°C · 135 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.