Rondônia Weather by Month — Temperature & Rainfall Guide

Rondônia is a region in Brazil. Many people wonder what the weather conditions are in Rondônia over the year. What is the best time to visit Rondônia?

This page shows the average weather conditions by month in Rondônia over the year in: January, February, March, April, May, June, July, August, September, October, November, December.

In January the weather in Rondônia is generally poor. In Porto Velho you can expect very warm maximum average daytime temperatures around 31°C (88°F) and nighttime temperatures around 24°C (75°F). These night and day temperatures are an average and some days may be even warmer. So be prepared and bring light clothes.

Find more detailed climate information for Rondônia in January here.

In February the weather in Rondônia is generally poor. In Porto Velho you can expect very warm maximum average daytime temperatures around 31°C (88°F) and nighttime temperatures around 24°C (75°F). On average, this month is the coldest month of the year in Rondônia.

Find more detailed climate information for Rondônia in February here.

In March the weather in Rondônia is generally poor. In Porto Velho you can expect very warm maximum average daytime temperatures around 31°C (88°F) and nighttime temperatures around 24°C (75°F). These night and day temperatures are an average and some days may be even warmer. So be prepared and bring light clothes.

Find more detailed climate information for Rondônia in March here.

In April the weather in Rondônia is generally poor. In Porto Velho you can expect very warm maximum average daytime temperatures around 31°C (88°F) and nighttime temperatures around 24°C (75°F). These night and day temperatures are an average and some days may be even warmer. So be prepared and bring light clothes.

Find more detailed climate information for Rondônia in April here.

In May the weather in Rondônia ranges from tolerable in Porto Velho to pleasant in Ariquemes. In Porto Velho you can expect very warm maximum average daytime temperatures around 31°C (88°F) and nighttime temperatures around 23°C (73°F). These night and day temperatures are an average and some days may be even warmer. So be prepared and bring light clothes.

Find more detailed climate information for Rondônia in May here.

In June the weather in Rondônia ranges from pleasant in Porto Velho to perfect in Ariquemes. The average maximum daytime temperatures are very high and range from 30°C (86°F) in Vilhena to 33°C (91°F) in Ariquemes. These night and day temperatures are an average and some days may be even warmer. So be prepared and bring light clothes.

Find more detailed climate information for Rondônia in June here.

In July the weather in Rondônia ranges from tolerable in Ariquemes to perfect in Porto Velho. The average maximum daytime temperatures are very high and range from 31°C (88°F) in Vilhena to 35°C (95°F) in Ariquemes. These night and day temperatures are an average and some days may be even warmer. So be prepared and bring light clothes.

Find more detailed climate information for Rondônia in July here.

In August the weather in Rondônia ranges from poor in Ariquemes to unpleasant in Porto Velho. The temperatures range from very high in Vilhena with 33°C (91°F) to extremely high in Ariquemes with 36°C (97°F). On average, this month is one of the warmest months of the year in Rondônia. So be prepared and make sure to dress lightly.

Find more detailed climate information for Rondônia in August here.

In September the weather in Rondônia is generally unpleasant. The average maximum daytime temperatures are very high and range from 33°C (91°F) in Vilhena to 35°C (95°F) in Ariquemes. These night and day temperatures are an average and some days may be even warmer. So be prepared and bring light clothes.

Find more detailed climate information for Rondônia in September here.

In October the weather in Rondônia ranges from unpleasant in Ariquemes to tolerable in Porto Velho. The average maximum daytime temperatures are very high and range from 31°C (88°F) in Vilhena to 34°C (93°F) in Ariquemes. These night and day temperatures are an average and some days may be even warmer. So be prepared and bring light clothes.

Find more detailed climate information for Rondônia in October here.

In November the weather in Rondônia is generally poor. The average maximum daytime temperatures are very high and range from 30°C (86°F) in Vilhena to 32°C (90°F) in Ariquemes. These night and day temperatures are an average and some days may be even warmer. So be prepared and bring light clothes.

Find more detailed climate information for Rondônia in November here.

In December the weather in Rondônia is generally poor. The temperatures range from high in Vilhena with 30°C (86°F) to very high in Ariquemes with 32°C (90°F). These night and day temperatures are an average and some days may be even warmer. So be prepared and bring light clothes.

Find more detailed climate information for Rondônia in December here.