Ji Paraná climate
Ji Paraná (Rondônia, Brazil) has a tropical savanna (dry winter) climate (Köppen Aw). The average temperature over the year is 27 °C80 °F, and about 1,554 mm61 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Ji Paraná climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 2985 | 2373 | 2679 | 2399.4 |
| Feb | 2984 | 2373 | 2678 | 2499.8 |
| Mar | 2984 | 2373 | 2678 | 2319.1 |
| Apr | 2984 | 2272 | 2678 | 1204.7 |
| May | 2985 | 2170 | 2578 | 612.4 |
| Jun | 3188 | 2068 | 2678 | 140.5 |
| Jul | 3492 | 2068 | 2780 | 150.6 |
| Aug | 3697 | 2170 | 2984 | 200.8 |
| Sep | 3697 | 2374 | 3085 | 753.0 |
| Oct | 3494 | 2374 | 2984 | 1365.4 |
| Nov | 3289 | 2374 | 2882 | 1676.6 |
| Dec | 3086 | 2373 | 2680 | 2268.9 |
| Year | 3697 | 2068 | 2780 | 1,55461 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 88% | 89% | 4.8 | 12:42 |
| Feb | 89% | 90% | 4.6 | 12:28 |
| Mar | 89% | 87% | 4.7 | 12:11 |
| Apr | 88% | 77% | 4.8 | 11:52 |
| May | 86% | 63% | 4.6 | 11:37 |
| Jun | 77% | 35% | 5.0 | 11:29 |
| Jul | 63% | 26% | 5.4 | 11:33 |
| Aug | 54% | 40% | 5.3 | 11:45 |
| Sep | 60% | 66% | 5.0 | 12:03 |
| Oct | 70% | 81% | 5.3 | 12:22 |
| Nov | 79% | 86% | 5.0 | 12:38 |
| Dec | 85% | 88% | 4.7 | 12:45 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Ji Paraná is like
The warmest month is September, with an average high of 36 °C97 °F and a low of 23 °C74 °F. The coldest is May, when highs average 29 °C85 °F and lows 21 °C70 °F. Seasonal differences are small — just 4.4 °C7.8 °F between the warmest and the coolest month.
It is wet, with about 1,554 mm61 in of precipitation per year. The wettest three-month stretch is January–March, which brings 46% of the annual total. Months with less than 20 mm0.8 in on average: June and July. The wettest month is February (249 mm9.8 in), the driest is June (14 mm0.5 in).
Relative humidity ranges from 54% in August to 89% in March. The clearest skies (lowest average cloud amount, 26%) are typical of July. Average wind speed near the ground ranges from 0 km/h (0 mph) in November to 1 km/h (0 mph) in July. Daylight lasts from about 11.5 hours in June to 12.8 hours in December.
Best time to visit Ji Paraná
Based on these averages, the most comfortable months for sightseeing and outdoor activities are May and June: average highs of 29 °C85 °F to 31 °C88 °F with 14 mm0.5 in to 61 mm2.4 in of precipitation per month.
The most challenging month is February, which is very wet (249 mm9.8 in) and humid (89% relative humidity).
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Ji Paraná
- Wetter months (October–March) — highs 2984 to 34 °C94 °F, lows around 23 °C73 °F, about 208 mm8.2 in of precipitation a month. Pack very light, breathable clothing, a sun hat and plenty of water and a good rain jacket or umbrella and quick-drying shoes.
- Drier months (April–September) — highs 2984 to 36 °C97 °F, lows 2068 to 23 °C74 °F, about 51 mm2.0 in of precipitation a month. Pack very light, breathable clothing, a sun hat and plenty of water.
How Ji Paraná compares
Compared with Porto Velho, about 319 km to the northwest, Ji Paraná has practically the same average temperature and receives 9% less precipitation (1,554 mm61 in vs 1,711 mm67 in). The difference is largest in September (0.6 °C1 °F warmer).
Of the 223 places in Brazil covered by World Climates, Ji Paraná is the 36th warmest by annual mean temperature and the 44th wettest by annual precipitation. See all of them on the Brazil climate page.
Places in other countries with the most similar temperature and rainfall pattern (seasons shifted for the other hemisphere where needed): Battambang (Cambodia, Aw), Barinas (Venezuela, Aw) and Séguéla (Ivory Coast, Aw).
Nearby places
- Vilhena 285 km · 23 °C74 °F · 1,738 mm68 in
- Porto Velho 319 km · 27 °C80 °F · 1,711 mm67 in
- Tangará da Serra 638 km · 25 °C78 °F · 1,458 mm57 in
- Rio Branco 649 km · 26 °C78 °F · 1,737 mm68 in
- Sorriso 704 km · 26 °C78 °F · 1,535 mm60 in
- Sinop 711 km · 26 °C78 °F · 1,633 mm64 in
- Santa Cruz de la Sierra 779 km · 25 °C77 °F · 1,139 mm45 in
- Cuiabá 822 km · 27 °C81 °F · 1,312 mm52 in
Frequently asked questions
What is the warmest month in Ji Paraná?
September is the warmest month in Ji Paraná, with an average high of 36 °C (97 °F) and an average low of 23 °C (74 °F).
What is the coldest month in Ji Paraná?
May is the coldest month, with an average high of 29 °C (85 °F) and an average low of 21 °C (70 °F).
When does it rain the most in Ji Paraná?
February is the wettest month with about 249 mm (9.8 in) of precipitation; June is the driest with about 14 mm (0.5 in).
What is the best time to visit Ji Paraná?
Judging by long-term averages, the most comfortable months are May and June.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 225 m, while Ji Paraná lies at about 157 m. Temperatures on this page were therefore adjusted by +0.4 °C0.8 °F using the standard lapse rate of 6.5 °C per 1,000 m.