Vilhena climate
Vilhena (Rondônia, Brazil) has a tropical savanna (dry winter) climate (Köppen Aw). The average temperature over the year is 23 °C74 °F, and about 1,738 mm68 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Vilhena climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 2679 | 2068 | 2374 | 30712 |
| Feb | 2679 | 2068 | 2374 | 28511 |
| Mar | 2679 | 2069 | 2374 | 26610 |
| Apr | 2679 | 2068 | 2374 | 1265.0 |
| May | 2678 | 1965 | 2272 | 582.3 |
| Jun | 2679 | 1763 | 2271 | 120.5 |
| Jul | 2781 | 1762 | 2271 | 90.3 |
| Aug | 3085 | 1865 | 2475 | 261.0 |
| Sep | 3187 | 2068 | 2578 | 612.4 |
| Oct | 2985 | 2169 | 2577 | 1536.0 |
| Nov | 2882 | 2169 | 2475 | 1957.7 |
| Dec | 2780 | 2169 | 2474 | 2409.4 |
| Year | 3187 | 1762 | 2374 | 1,73868 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 91% | 91% | 4.8 | 12:48 |
| Feb | 91% | 90% | 4.7 | 12:32 |
| Mar | 91% | 88% | 4.7 | 12:12 |
| Apr | 90% | 75% | 4.9 | 11:50 |
| May | 87% | 61% | 4.6 | 11:32 |
| Jun | 82% | 42% | 4.8 | 11:23 |
| Jul | 70% | 34% | 5.1 | 11:26 |
| Aug | 58% | 43% | 5.2 | 11:42 |
| Sep | 63% | 68% | 4.8 | 12:03 |
| Oct | 76% | 83% | 5.1 | 12:24 |
| Nov | 86% | 88% | 5.0 | 12:43 |
| Dec | 89% | 89% | 4.8 | 12:52 |
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 Vilhena is like
The warmest month is September, with an average high of 31 °C87 °F and a low of 20 °C68 °F. The coldest is June, when highs average 26 °C79 °F and lows 17 °C63 °F. Seasonal differences are small — just 3.9 °C7 °F between the warmest and the coolest month.
It is wet, with about 1,738 mm68 in of precipitation per year. The wettest three-month stretch is January–March, which brings 49% of the annual total. Months with less than 20 mm0.8 in on average: June and July. The wettest month is January (307 mm12 in), the driest is July (9 mm0.3 in).
Relative humidity ranges from 58% in August to 91% in February. The clearest skies (lowest average cloud amount, 34%) are typical of July. Average wind speed near the ground ranges from 0 km/h (0 mph) in December to 1 km/h (0 mph) in August. Daylight lasts from about 11.4 hours in June to 12.9 hours in December.
Best time to visit Vilhena
Based on these averages, the most comfortable months for sightseeing and outdoor activities are June–August: average highs of 26 °C79 °F to 30 °C85 °F with 9 mm0.3 in to 26 mm1.0 in of precipitation per month.
The most challenging month is January, which is very wet (307 mm12 in) and humid (91% 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 Vilhena
- Wetter months (October–March) — highs 2679 to 29 °C85 °F, lows 2068 to 21 °C69 °F, about 241 mm9.5 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and a good rain jacket or umbrella and quick-drying shoes.
- Drier months (April–September) — highs 2678 to 31 °C87 °F, lows 1762 to 20 °C68 °F, about 49 mm1.9 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses.
How Vilhena compares
Compared with Ji Paraná, about 285 km to the northwest, Vilhena is on average 3.5 °C6.2 °F cooler and receives 12% more precipitation (1,738 mm68 in vs 1,554 mm61 in). The difference is largest in July (4.9 °C8.7 °F cooler).
Of the 223 places in Brazil covered by World Climates, Vilhena is the 119th warmest by annual mean temperature and the 20th 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): Uromi (Nigeria, Aw), Nsukka (Nigeria, Aw) and Owo (Nigeria, Aw).
Nearby places
- Ji Paraná 285 km · 27 °C80 °F · 1,554 mm61 in
- Tangará da Serra 355 km · 25 °C78 °F · 1,458 mm57 in
- Sorriso 482 km · 26 °C78 °F · 1,535 mm60 in
- Sinop 514 km · 26 °C78 °F · 1,633 mm64 in
- Cuiabá 540 km · 27 °C81 °F · 1,312 mm52 in
- Porto Velho 603 km · 27 °C80 °F · 1,711 mm67 in
- Santa Cruz de la Sierra 649 km · 25 °C77 °F · 1,139 mm45 in
- Rondonópolis 723 km · 27 °C80 °F · 1,405 mm55 in
Frequently asked questions
What is the warmest month in Vilhena?
September is the warmest month in Vilhena, with an average high of 31 °C (87 °F) and an average low of 20 °C (68 °F).
What is the coldest month in Vilhena?
June is the coldest month, with an average high of 26 °C (79 °F) and an average low of 17 °C (63 °F).
When does it rain the most in Vilhena?
January is the wettest month with about 307 mm (12.1 in) of precipitation; July is the driest with about 9 mm (0.3 in).
What is the best time to visit Vilhena?
Judging by long-term averages, the most comfortable months are June–August.
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 493 m, while Vilhena lies at about 591 m. Temperatures on this page were therefore adjusted by −0.6 °C1.1 °F using the standard lapse rate of 6.5 °C per 1,000 m.