Climate averages 1991–2020
Ariquemes weather
in May.
A hot, wet month: one of the coolest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a hot month in Ariquemes: daytime highs average 29.3°C and nights cool to about 22.2°C. By daytime temperature it is one of the coolest months of the year.
Expect about 91 mm of rain on roughly 16 days, which makes May a wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 40 min on an average May day.
The nearest other city in this atlas is Porto Velho (159 km away). In May its highs average 29.1°C, about as warm as Ariquemes, with 133 mm of rain.
Among the 448 cities listed in Brazil, Ariquemes ranks joint 57th of 448 for the warmest May highs and 280th of 448 for the driest May (rainfall, lowest first). The mean May high of those 448 cities is 25.3°C; Ariquemes is 4.0°C warmer than that mean.
From May to June, average highs rise by 1.4°C to 30.7°C, and monthly rainfall falls from 91 mm to 20 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
Ariquemes climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.5°C22.8°C | 22.8°C | 281 | 27.6 | 12.613 h |
| February | 29.3°C22.7°C | 22.7°C | 282 | 26.3 | 12.412 h |
| March | 29.4°C22.8°C | 22.8°C | 274 | 28.1 | 12.212 h |
| April | 29.4°C22.7°C | 22.7°C | 185 | 23.8 | 11.912 h |
| May, selected | 29.3°C22.2°C | 22.2°C | 91 | 15.7 | 11.712 h |
| June | 30.7°C21.5°C | 21.5°C | 20 | 4.4 | 11.612 h |
| July | 32.7°C21.5°C | 21.5°C | 13 | 2.5 | 11.612 h |
| August | 33.9°C22.4°C | 22.4°C | 32 | 5.3 | 11.812 h |
| September | 33.1°C23.3°C | 23.3°C | 86 | 13.9 | 12.012 h |
| October | 32.1°C23.3°C | 23.3°C | 142 | 20.1 | 12.312 h |
| November | 30.4°C23.1°C | 23.1°C | 208 | 23.2 | 12.613 h |
| December | 29.8°C22.9°C | 22.9°C | 246 | 26.8 | 12.713 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
- Porto Velho in MayBrazil · 159 kmHigh 29.1°C · Low 22.9°C · 133 mm rain
- Ji Paraná in MayBrazil · 161 kmHigh 29.2°C · Low 21.8°C · 78 mm rain
- Cacoal in MayBrazil · 243 kmHigh 29.3°C · Low 21.6°C · 77 mm rain
- Riberalta in MayBolivia · 351 kmHigh 28.5°C · Low 22.0°C · 81 mm rain
- Vilhena in MayBrazil · 445 kmHigh 27.5°C · Low 19.4°C · 57 mm rain
- Rio Branco in MayBrazil · 522 kmHigh 28.4°C · Low 21.6°C · 76 mm rain
- Trinidad in MayBolivia · 583 kmHigh 27.6°C · Low 20.9°C · 84 mm rain
- Coari in MayBrazil · 648 kmHigh 28.4°C · Low 23.7°C · 297 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 Ariquemes) is explained once on the Ariquemes year overview and on the Sources, method and limits page.