Rondônia Weather in January

Average temperatures, rainfall, sunshine and the best places to visit in Rondônia, Brazil in January.

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Porto Velho Ariquemes Ji-Paraná Vilhena

Planning a journey to Rondônia, Brazil this January and curious over the weather conditions to await? Your essential details are found on this page, answering your query:

What to Expect in Rondônia in January

Rondônia, Brazil is a region in Brazil. January in Rondônia generally has very warm temperatures, with heavy precipitation.

Temperatures

You can expect very warm maximum daytime temperatures of around 31°C (88°F) and nighttime temperatures around 24°C (75°F) in Porto Velho. The temperatures cited for both day and night represent usual averages, but it's possible some days could be hotter. It's advisable to dress accordingly to handle the heat.

To learn more about the conditions in specific areas of Rondônia, Brazil, check out the map below.

Precipitation

In January, precipitation varies across different areas. From heavy rainfall in Ji-Paraná with an average of 277 mm (11 in) to heavy rainfall in Cacoal with 314 mm (12 in).

Explore Rondônia by month

Pick a month to see the average temperature, rainfall and sunshine in Rondônia — and find the best time to visit. (based on Porto Velho)

January31°C (88°F) February31°C (88°F) March31°C (88°F) April31°C (88°F) May31°C (88°F) June32°C (90°F) This monthJuly33°C (91°F) August35°C (95°F) September34°C (93°F) October33°C (91°F) November32°C (90°F) December31°C (88°F)
Best Time to Visit Rondônia →

Best Places to Visit in Rondônia in January

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Rondônia.

Conditions Temperatures Precipitation
perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Rondônia

What is the weather like in January for some of the most popular destinations in Rondônia, Brazil?

Temperature range in Rondônia (January)

Precipitation variation in Rondônia (January)

Porto Velho

In January Porto Velho generally has very high temperatures with maximum daytime temperatures around 31°C (88°F), minimum nighttime temperatures around 24°C (75°F) and heavy monthly rainfall. So on average the conditions are poor that month.

« December
January
February »
December
January
February
Max temperature
31°C (88°F)
31°C (88°F)
31°C (88°F)
Min temperature
24°C (75°F)
24°C (75°F)
24°C (75°F)
Monthly rainfall
300 mm (12 in)
311 mm (12 in)
355 mm (14 in)
Monthly rainy days
22 days
24 days
22 days
Weather conditions
poor
poor
poor
Climate in Porto Velho →

Ariquemes

In January Ariquemes generally has very high temperatures with maximum daytime temperatures around 31°C (88°F), minimum nighttime temperatures around 23°C (73°F) and heavy monthly rainfall. So on average the conditions are poor that month.

« December
January
February »
December
January
February
Max temperature
32°C (90°F)
31°C (88°F)
31°C (88°F)
Min temperature
23°C (73°F)
23°C (73°F)
23°C (73°F)
Monthly rainfall
261 mm (10 in)
297 mm (12 in)
320 mm (13 in)
Monthly rainy days
20 days
22 days
21 days
Weather conditions
poor
poor
poor
Climate in Ariquemes →

Ji-Paraná

In January Ji-Paraná generally has very high temperatures with maximum daytime temperatures around 31°C (88°F), minimum nighttime temperatures around 23°C (73°F) and heavy monthly rainfall. So on average the conditions are poor that month.

« December
January
February »
December
January
February
Max temperature
31°C (88°F)
31°C (88°F)
30°C (86°F)
Min temperature
23°C (73°F)
23°C (73°F)
23°C (73°F)
Monthly rainfall
258 mm (10 in)
277 mm (11 in)
298 mm (12 in)
Monthly rainy days
18 days
21 days
19 days
Weather conditions
poor
poor
poor
Climate in Ji-Paraná →

Vilhena

In January Vilhena generally has high temperatures with maximum daytime temperatures around 29°C (84°F), minimum nighttime temperatures around 21°C (70°F) and heavy monthly rainfall. So on average the conditions are poor that month.

« December
January
February »
December
January
February
Max temperature
30°C (86°F)
29°C (84°F)
29°C (84°F)
Min temperature
21°C (70°F)
21°C (70°F)
21°C (70°F)
Monthly rainfall
276 mm (11 in)
283 mm (11 in)
318 mm (13 in)
Monthly rainy days
17 days
19 days
18 days
Weather conditions
poor
poor
poor
Climate in Vilhena →

Cacoal

In January Cacoal generally has very high temperatures with maximum daytime temperatures around 31°C (88°F), minimum nighttime temperatures around 23°C (73°F) and heavy monthly rainfall. So on average the conditions are poor that month.

« December
January
February »
December
January
February
Max temperature
31°C (88°F)
31°C (88°F)
30°C (86°F)
Min temperature
23°C (73°F)
23°C (73°F)
22°C (72°F)
Monthly rainfall
285 mm (11 in)
314 mm (12 in)
333 mm (13 in)
Monthly rainy days
17 days
20 days
19 days
Weather conditions
poor
poor
poor
Climate in Cacoal →

Is your destination not in the list? Have a look at all destinations in Rondônia, in Brazil.

In our records: Brazil January extremes

Notable January records observed across cities in Brazil in our climate database (1976 – 2026). Historic readings can vary in quality, so treat these as illustrative.

  • In our records, the warmest January day in Brazil reached 43°C (109°F) in Rio de Janeiro on January 22, 1988.
  • From our sources, the wettest January day in Brazil brought 318 mm (13 in) in Balneário Camboriú on January 31, 2008.

Popular cities in January

Day & night temperatures, rainfall and average weather in Rondônia in January.

City Weather Day temp Night temp Rainfall
Porto Velho 31°C (88°F) 24°C (75°F) 311 mm (12 in)
Ariquemes 31°C (88°F) 23°C (73°F) 297 mm (12 in)
Ji-Paraná 31°C (88°F) 23°C (73°F) 277 mm (11 in)
Vilhena 29°C (84°F) 21°C (70°F) 283 mm (11 in)
Cacoal 31°C (88°F) 23°C (73°F) 314 mm (12 in)
Rondônia 31°C (88°F) 23°C (73°F) 280 mm (11 in)

Rondônia weather in January: frequently asked questions

What is the weather like in Rondônia, Brazil in January?

January in Rondônia, Brazil brings poor weather. In Porto Velho, daytime temperatures are typically around 31°C (88°F) and nighttime lows hover near 24°C (75°F).

What is the average temperature in Rondônia, Brazil in January?

Daytime temperatures in Porto Velho peak at roughly 31°C (88°F) in January, dropping to about 24°C (75°F) overnight.

Does Rondônia, Brazil get a lot of rain in January?

Rainfall in Rondônia, Brazil peaks during January. Porto Velho averages roughly 311 mm (12 in), so frequent and sometimes heavy showers are the norm.

Is January a Good Time to Visit Rondônia, Brazil?

In our opinion, January may not be the ideal time to visit Rondônia, Brazil due to the typically poor weather in Porto Velho.

On average, the best time to visit Rondônia, Brazil is in June and July with generally tolerable weather in Porto Velho. In contrast, January, February, March, April, August, September, October, November and December tend to have poor weather conditions.

Interested in more climate information?

We have much more information about the climate in Rondônia.

Weather and climate has detailed information for every country in the world. Are you going to Brazil? Get detailed historical weather averages for many cities in Brazil.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

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