Climate in Rondônia

Average daytime and nighttime temperatures

All climatic diagrams on this site result from the collected data from seven measuring weather stations in Rondônia.
Weather stations at an altitude above 610m have not been included.
All data correspond to the average monthly values of the last 20 years.

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Hours of sunshine per daySunshine hours per day in Rondônia
The number of hours of sunshine refers to the time when the sun is actually visible. That is, without any obstruction of visibility by clouds, fog or mountains. With 8 hours per day, July is the sunniest month in the state of Rondônia. In February the sun shines the shortest.
Rainy days per monthRainy days per month in Rondônia
A rainy day is a day on which at least an amount of 0.1 mm precipitation (=0.1 liter) per square meter falls. This can be rain, snow, hail or even dew. So it does not have to rain the whole day. With 18 rainy days, January offers the most number of rainy days, and in July the least.
Precipitation in mm/dayPrecipitation in Rondônia
The amount of precipitation is measured in millimeters per square meter. Thus, at two mm/day, two liters of water fall on one square meter within 24 hours. With only 0.4 mm, the least rain falls in July. February, on the other hand, has the most rain.
Map of Rondônia

Most important cities in the federal state »Rondônia«

Alone 2 cities with over 100,000 inhabitants are located here. The federal state has a west-east extension of about 570 km and over 480 km from north to south.

CityPopulationGeo position
Porto Velho482,8408° 45' 43"S63° 54' 14"W
Ji Paraná107,69710° 53' 7"S61° 57' 6"W
Vilhena63,23112° 44' 26"S60° 8' 45"W
Ariquemes58,0969° 54' 48"S63° 2' 27"W
Cacoal55,56011° 26' 19"S61° 26' 50"W
Pôsto Fiscal Rolim de Moura37,94913° 4' 58"S62° 16' 38"W
Guajará Mirim34,11910° 46' 58"S65° 20' 22"W
Jaru28,01510° 26' 20"S62° 27' 59"W
Ouro Preto do Oeste26,68310° 44' 53"S62° 12' 57"W
Pimenta Bueno25,76211° 40' 21"S61° 11' 37"W
Presidente Médici11,92211° 10' 31"S61° 54' 5"W

Data basis: German Weather Service, individual values averaged and supplemented by own elements. Data on cities and inhabitants:, United Nations Statistics Division and own research.
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