When to go · Brazil
When to go to Porto Velho
When to go
What the averages say
On these averages, Porto Velho has a mean high between 18°C and 32°C and under 150 mm of rain in May and June.
- Hot months (a mean high of 32°C or more): July to October.
- Wet months (150 mm of rain or more): November to April.
- Humid months (a high of 25°C or more with relative humidity of 70% or more): October to July.
- The warmest month is September (34°C) and the coolest January (28°C). The wettest is January (254 mm) and the driest July (20 mm); about 1,710 mm of rain falls in a year.
How these sentences are worded
Each sentence is written from the figures by fixed rules, and says no more than they do. Mild to warm: a mean daily high from 18°C up to 32°C. Hot: 32°C or more. Cool: 10°C up to 18°C. Cold: under 10°C. Dry: under 50 mm of rain in the month; wet: 150 mm or more. Humid: a high of 25°C or more with relative humidity of 70% or more. A month is described as good for going when it is mild to warm and not wet.
The year at a glance
- Mild to warm and dry
- Mild to warm, humid or showery
- Hot
- Cool
- Wet
- Cold
- JanWet
- FebWet
- MarWet
- AprWet
- MayMild–warm, mixed
- JunMild–warm, mixed
- JulHot
- AugHot
- SeptHot
- OctHot
- NovWet
- DecWet
Month by month
Every month in Porto Velho
| Month | High | Low | Rain | Humidity | Cloud | Sunlight (kWh/m²/day) | High in Dubai | What it is like |
|---|---|---|---|---|---|---|---|---|
| January | 28°C | 23°C | 254 mm | 91% | 89% | 4.6 | 23°C | Wet |
| February | 28°C | 23°C | 241 mm | 91% | 89% | 4.5 | 24°C | Wet |
| March | 28°C | 23°C | 228 mm | 91% | 88% | 4.5 | 27°C | Wet |
| April | 28°C | 23°C | 172 mm | 91% | 81% | 4.6 | 31°C | Wet |
| May | 28°C | 22°C | 94 mm | 90% | 69% | 4.5 | 35°C | Mild to warm, humid or showery |
| June | 29°C | 22°C | 32 mm | 86% | 45% | 4.9 | 37°C | Mild to warm, humid or showery |
| July | 32°C | 21°C | 20 mm | 75% | 34% | 5.3 | 39°C | Hot |
| August | 34°C | 22°C | 39 mm | 65% | 47% | 5.2 | 39°C | Hot |
| September | 34°C | 24°C | 83 mm | 68% | 67% | 5 | 37°C | Hot |
| October | 33°C | 24°C | 147 mm | 75% | 82% | 5.1 | 34°C | Hot |
| November | 31°C | 24°C | 154 mm | 82% | 87% | 4.8 | 29°C | Wet |
| December | 29°C | 23°C | 246 mm | 89% | 88% | 4.5 | 25°C | Wet |
The Dubai column is Dubai's mean daily high, for comparison.
Modelled averages for an area about 50 km across, not a weather station's record: NASA POWER climatology, 2001–2020. These data were obtained from the NASA Langley Research Center (LaRC) POWER Project funded through the NASA Earth Science/Applied Science Program.
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