, with a rainy season from October to April and a dry season from May to September.
The city is located in Brazil, in the state of Tocantins and along the river of the same name, at 10 degrees south latitude and 240 meters (785 feet) above sea level. The river is very wide because a hydroelectric power plant was built further north, near the city of Lajeado.
, which has a similar climate. We are in a transition zone between the north-west of Brazil, where the Amazon rainforest is located, and the north-east, which is more arid.
From June to August, the dry period, would be the austral winter, and in fact the night temperatures decrease a bit, but during the day it is very hot. In addition, from mid-August to October, the temperature rises and the hottest days of the year are recorded, before the rains. In September 2010, the temperature reached 42 °C (107.5 °F), and the average high was 37.9 °C (100 °F).
The best time to visit Porto Nacional is from May to September, being the dry season. It must be said that this is a very hot period, especially in August and September, so you can choose the period from May to July.
. Here are the average temperatures.
January is generally a warm to hot, muggy month. The average temperature is of
27.2 °C, with a minimum of
22.6 °C and a maximum of
31.9 °C.

On the coldest nights of the month, the temperature usually drops to around
21 °C.

On the warmest days of the month, the temperature usually reaches around
36 °C.

Precipitation amounts to
255 mm, distributed over 18 days.
The day lasts on average 12 hours and 35 minutes.

There are on average 4.5 hours of sunshine per day. So, the sun shines 36% of the time.
The average humidity is 73%. Hence, the air is normally humid.
The average wind speed is of
4.6 kph.
February is generally a warm to hot, muggy month. The average temperature is of
27.3 °C, with a minimum of
22.4 °C and a maximum of
32.2 °C.

On the coldest nights of the month, the temperature usually drops to around
21 °C.

On the warmest days of the month, the temperature usually reaches around
36 °C.

Precipitation amounts to
240 mm, distributed over 16 days.
The day lasts on average 12 hours and 25 minutes.

There are on average 5 hours of sunshine per day. So, the sun shines 39% of the time.
The average humidity is 74%. Hence, the air is normally humid.
The average wind speed is of
4.7 kph.
March is generally a warm to hot, muggy month. The average temperature is of
27.1 °C, with a minimum of
22.4 °C and a maximum of
31.8 °C.

On the coldest nights of the month, the temperature usually drops to around
20.5 °C.

On the warmest days of the month, the temperature usually reaches around
35.5 °C.

Precipitation amounts to
270 mm, distributed over 18 days.
The day lasts on average 12 hours and 5 minutes.

There are on average 4.5 hours of sunshine per day. So, the sun shines 38% of the time.
The average humidity is 75%. Hence, the air is normally humid.
The average wind speed is of
5 kph.
April is generally a very hot month. The average temperature is of
27.7 °C, with a minimum of
22.4 °C and a maximum of
33.1 °C.

On the coldest nights of the month, the temperature usually drops to around
21 °C.

On the warmest days of the month, the temperature usually reaches around
36 °C.

Precipitation amounts to
165 mm, distributed over 11 days.
The day lasts on average 11 hours and 55 minutes.

There are on average 6.5 hours of sunshine per day. So, the sun shines 53% of the time.
The average humidity is 68%.
The average wind speed is of
4.9 kph.
May is generally a very hot month. The average temperature is of
27.6 °C, with a minimum of
21.5 °C and a maximum of
33.7 °C.

On the coldest nights of the month, the temperature usually drops to around
20 °C.

On the warmest days of the month, the temperature usually reaches around
36 °C.

Precipitation amounts to
50 mm, distributed over 4 days.
The day lasts on average 11 hours and 35 minutes.

There are on average 8.5 hours of sunshine per day. So, the sun shines 71% of the time.
The average humidity is 59%.
The average wind speed is of
6 kph.
June is generally a warm to hot month. However, there are remarkable differences between night and day. The average temperature is of
26.6 °C, with a minimum of
19.2 °C and a maximum of
34 °C.

On the coldest nights of the month, the temperature usually drops to around
17.5 °C.

On the warmest days of the month, the temperature usually reaches around
36 °C.

Precipitation amounts to only
3.1 mm, distributed over 0 days.
The day lasts on average 11 hours and 30 minutes.

There are on average 9 hours of sunshine per day. So, the sun shines 79% of the time.
The average humidity is 48%.
The average wind speed is of
7.4 kph.
July, the least warm month of the year, is generally a warm to hot month. However, there are remarkable differences between night and day. The average temperature is of
26.4 °C, with a minimum of
18.3 °C and a maximum of
34.5 °C.

On the coldest nights of the month, the temperature usually drops to around
17 °C.

On the warmest days of the month, the temperature usually reaches around
36.5 °C.

Precipitation amounts to only
1 mm, distributed over 0 days.
The day lasts on average 11 hours and 35 minutes.

There are on average 9.5 hours of sunshine per day. So, the sun shines 81% of the time.
The average humidity is 42%.
The average wind speed is of
8 kph.
August is generally a very hot month. However, there are remarkable differences between night and day. The average temperature is of
27.9 °C, with a minimum of
19.7 °C and a maximum of
36 °C.

On the coldest nights of the month, the temperature usually drops to around
17.5 °C.

On the warmest days of the month, the temperature usually reaches around
38.5 °C.

Precipitation amounts to only
5.2 mm, distributed over 0 days.
The day lasts on average 11 hours and 50 minutes.

There are on average 9 hours of sunshine per day. So, the sun shines 76% of the time.
The average humidity is 36%.
The average wind speed is of
8 kph.
September, the hottest month of the year, is generally a very hot month. However, there are remarkable differences between night and day. The average temperature is of
29.4 °C, with a minimum of
22.5 °C and a maximum of
36.4 °C.

On the coldest nights of the month, the temperature usually drops to around
20 °C.

On the warmest days of the month, the temperature usually reaches around
39.5 °C.

Precipitation amounts to
50 mm, distributed over 4 days.
The day lasts on average 12 hours and 5 minutes.

There are on average 6.5 hours of sunshine per day. So, the sun shines 53% of the time.
The average humidity is 43%.
The average wind speed is of
7.1 kph.
October is generally a very hot month. The average temperature is of
28.8 °C, with a minimum of
23 °C and a maximum of
34.5 °C.

On the coldest nights of the month, the temperature usually drops to around
20.5 °C.

On the warmest days of the month, the temperature usually reaches around
38.5 °C.

Precipitation amounts to
140 mm, distributed over 9 days.
The day lasts on average 12 hours and 20 minutes.

There are on average 5.5 hours of sunshine per day. So, the sun shines 46% of the time.
The average humidity is 59%.
The average wind speed is of
6.2 kph.
November is generally a very hot month. The average temperature is of
27.8 °C, with a minimum of
23.2 °C and a maximum of
32.4 °C.

On the coldest nights of the month, the temperature usually drops to around
20.5 °C.

On the warmest days of the month, the temperature usually reaches around
37 °C.

Precipitation amounts to
185 mm, distributed over 14 days.
The day lasts on average 12 hours and 35 minutes.

There are on average 5.5 hours of sunshine per day. So, the sun shines 43% of the time.
The average humidity is 70%.
The average wind speed is of
5.4 kph.
December is generally a warm to hot, muggy month. The average temperature is of
27.3 °C, with a minimum of
22.6 °C and a maximum of
32 °C.

On the coldest nights of the month, the temperature usually drops to around
21 °C.

On the warmest days of the month, the temperature usually reaches around
36 °C.

Precipitation amounts to
260 mm, distributed over 15 days.
The day lasts on average 12 hours and 40 minutes.

There are on average 4.5 hours of sunshine per day. So, the sun shines 37% of the time.
The average humidity is 73%. Hence, the air is normally humid.
The average wind speed is of
5 kph.