Climate averages 1991–2020
Ariquemes weather
in October.
A hot, wet month: the 4th warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a hot month in Ariquemes: daytime highs average 32.1°C and nights cool to about 23.3°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 142 mm of rain on roughly 20 days, which makes October a wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 19 min on an average October day.
The nearest other city in this atlas is Porto Velho (159 km away). In October its highs average 31.7°C, about as warm as Ariquemes, with 178 mm of rain.
Among the 448 cities listed in Brazil, Ariquemes ranks joint 63rd of 448 for the warmest October highs and joint 355th of 448 for the driest October (rainfall, lowest first). The mean October high of those 448 cities is 28.3°C; Ariquemes is 3.8°C warmer than that mean.
From October to November, average highs fall by 1.7°C to 30.4°C, and monthly rainfall rises from 142 mm to 208 mm.
The annual picture
October 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 | 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, selected | 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
October in nearby cities
- Porto Velho in OctoberBrazil · 159 kmHigh 31.7°C · Low 23.9°C · 178 mm rain
- Ji Paraná in OctoberBrazil · 161 kmHigh 32.1°C · Low 23.3°C · 143 mm rain
- Cacoal in OctoberBrazil · 243 kmHigh 32.0°C · Low 23.2°C · 156 mm rain
- Riberalta in OctoberBolivia · 351 kmHigh 31.4°C · Low 23.6°C · 159 mm rain
- Vilhena in OctoberBrazil · 445 kmHigh 29.5°C · Low 21.2°C · 165 mm rain
- Rio Branco in OctoberBrazil · 522 kmHigh 31.5°C · Low 23.0°C · 137 mm rain
- Trinidad in OctoberBolivia · 583 kmHigh 31.0°C · Low 23.3°C · 161 mm rain
- Coari in OctoberBrazil · 648 kmHigh 30.3°C · Low 24.7°C · 163 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.