Porto Velho weather in August
In August, Porto Velho has daytime highs averaging 33 °C, nights around 23 °C, with 7.4 wet days. Figures are 1991–2020 climate normals.
- 32.8°C Average high
- 22.8°C Average low
- 7.4days Wet days
- 43mm Rainfall
- 12h Daylight
Daily temperatures through August
How August 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 August | 32.7 °C | 22.3 °C | 15 % |
| 11–20 August | 33.0 °C | 22.8 °C | 21 % |
| 21–31 August | 32.8 °C | 23.1 °C | 33 % |
- Rain is most likely over days 21–31 of August (33 % of days) and least likely over days 1–10 (15 %).
What to expect
| Measure | Typical August | Share of the month |
|---|---|---|
| Days above 25 °C | 31 of 31 | 100 % |
| Days above 30 °C | 28 of 31 | 90 % |
| Days below 0 °C | 0 of 31 | 0 % |
| Days with more than 1 mm rain | 7.4 of 31 | 24 % |
Conditions in August
| Measure | Average |
|---|---|
| Mean temperature | 27 °C |
| Record high (1991–2020) | 38 °C |
| Record low (1991–2020) | 15 °C |
| Relative humidity | 71 % |
| Wind speed | 8.8 km/h |
| Cloud cover | 41 % |
Where Porto Velho ranks in August
| Ranking | Position | Value |
|---|---|---|
| The warmest places in South America in August | 31stof 50 | 33 °C |
August compared with the months around it
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| June | 29.7 °C | 46 mm | 53 % |
| July | 31.2 °C | 23 mm | 36 % |
| August | 32.8 °C | 43 mm | 41 % |
| September | 32.5 °C | 102 mm | 62 % |
| October | 31.7 °C | 176 mm | 79 % |
See all twelve months for Porto Velho
- August is the warmest month in Porto Velho.
- It is the 2nd driest month of the year.
- It ranks 2nd for least cloud cover.
- Days last about 12 hours from sunrise to sunset.
- It rains on 7.4 of 31 days — 24 % of the month.
- Nights are about 10 °C cooler than the middle of the day.
- The hottest August day on record since 1991 reached 38 °C, 5.2 °C above the usual daytime high.
Nearby destinations in August
| Destination | Avg high | Wet days |
|---|---|---|
| Porto Velho | 33 °C | 7.4 |
| Rio Branco | 32 °C | 6 |
QuestionsAugust in Porto Velho, answered
How warm is Porto Velho in August?
Daily highs average 33 °C and nights fall to about 23 °C, a spread of 10 °C between afternoon and dawn. That makes August the 2nd warmest month of the year here.
Does it rain much in Porto Velho in August?
August averages 43 mm of rain, spread over about 7 of the 31 days — 24 % of the month. Cloud cover averages 41 % of the sky.
How long are the days in August?
Porto Velho averages 12 hours between sunrise and sunset in August. 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.