, with a rainy season from October to April and a dry season in the austral winter, from June to August, while May and September are transitional months.
The city is the capital of the state of Acre and is located at 10 degrees south latitude, in the west of Brazil, 65 km (40 miles) away from the border with Bolivia, along the Acre River. We are in the Amazon rainforest.
The dry period, from June to August, is also the coolest at night (in fact, we are in the austral winter). From time to time, in addition, there may be cool periods due to the winds that blow from the Argentine Pampas, with highs of about 20 °C (68 °F) or even below, while at night the temperature can even reach 10 °C (50 °F).
However, from mid-August to October, the temperature rises and the hottest days of the year are recorded, before the rains.
The best time to visit Rio Branco is from June to August, being the dry season. June is the best month, as July and August are more likely to be very hot.
. Here are the average temperatures.
January is generally a warm to hot, muggy month. The average temperature is of
27 °C, with a minimum of
22.7 °C and a maximum of
31.2 °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
33.5 °C.
Precipitation amounts to
295 mm, distributed over 19 days.
The day lasts on average 12 hours and 35 minutes.
There are on average 3.5 hours of sunshine per day. So, the sun shines 28% of the time.
The average humidity is 87%. Hence, the air is normally humid.
The average wind speed is of
5.3 kph.
February is generally a warm to hot, muggy month. The average temperature is of
26.9 °C, with a minimum of
22.7 °C and a maximum of
31.1 °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
33.5 °C.
Precipitation amounts to
300 mm, distributed over 17 days.
The day lasts on average 12 hours and 25 minutes.
There are on average 3 hours of sunshine per day. So, the sun shines 26% of the time.
The average humidity is 87%. Hence, the air is normally humid.
The average wind speed is of
5.2 kph.
March is generally a warm to hot, muggy month. The average temperature is of
27 °C, with a minimum of
22.7 °C and a maximum of
31.3 °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
33.5 °C.
Precipitation amounts to
280 mm, distributed over 17 days.
The day lasts on average 12 hours and 5 minutes.
There are on average 3.5 hours of sunshine per day. So, the sun shines 30% of the time.
The average humidity is 87%. Hence, the air is normally humid.
The average wind speed is of
4.8 kph.
April is generally a warm to hot, muggy month. The average temperature is of
26.9 °C, with a minimum of
22.3 °C and a maximum of
31.4 °C.
On the coldest nights of the month, the temperature usually drops to around
18.5 °C.
On the warmest days of the month, the temperature usually reaches around
34.5 °C.
Precipitation amounts to
205 mm, distributed over 13 days.
The day lasts on average 11 hours and 55 minutes.
There are on average 4 hours of sunshine per day. So, the sun shines 36% of the time.
The average humidity is 87%. Hence, the air is normally humid.
The average wind speed is of
4.4 kph.
May is generally a warm to hot, muggy month. The average temperature is of
26.1 °C, with a minimum of
21.2 °C and a maximum of
30.9 °C.
On the coldest nights of the month, the temperature usually drops to around
16.5 °C.
On the warmest days of the month, the temperature usually reaches around
33.5 °C.
Precipitation amounts to
90 mm, distributed over 8 days.
The day lasts on average 11 hours and 35 minutes.
There are on average 5 hours of sunshine per day. So, the sun shines 43% of the time.
The average humidity is 84%. Hence, the air is normally humid.
The average wind speed is of
4.4 kph.
June, the least warm month of the year, is generally a warm to hot, muggy month. The average temperature is of
25.4 °C, with a minimum of
20 °C and a maximum of
30.9 °C.
On the coldest nights of the month, the temperature usually drops to around
15.5 °C.
On the warmest days of the month, the temperature usually reaches around
33.5 °C.
Precipitation amounts to
35 mm, distributed over 3 days.
The day lasts on average 11 hours and 35 minutes.
There are on average 6 hours of sunshine per day. So, the sun shines 50% of the time.
The average humidity is 82%. Hence, the air is normally humid.
The average wind speed is of
4.4 kph.
July is generally a warm to hot, muggy month. The average temperature is of
25.5 °C, with a minimum of
19 °C and a maximum of
32 °C.
On the coldest nights of the month, the temperature usually drops to around
13.5 °C.
On the warmest days of the month, the temperature usually reaches around
35 °C.
Precipitation amounts to
30 mm, distributed over 3 days.
The day lasts on average 11 hours and 35 minutes.
There are on average 7 hours of sunshine per day. So, the sun shines 61% of the time.
The average humidity is 75%. Hence, the air is normally humid.
The average wind speed is of
4.7 kph.
August is generally a warm to hot month. However, there are remarkable differences between night and day. The average temperature is of
26.8 °C, with a minimum of
19.8 °C and a maximum of
33.7 °C.
On the coldest nights of the month, the temperature usually drops to around
14 °C.
On the warmest days of the month, the temperature usually reaches around
37 °C.
Precipitation amounts to
55 mm, distributed over 4 days.
The day lasts on average 11 hours and 50 minutes.
There are on average 6 hours of sunshine per day. So, the sun shines 49% of the time.
The average humidity is 68%.
The average wind speed is of
5.4 kph.
September is generally a very hot, muggy month. The average temperature is of
27.8 °C, with a minimum of
21.4 °C and a maximum of
34.2 °C.
On the coldest nights of the month, the temperature usually drops to around
16.5 °C.
On the warmest days of the month, the temperature usually reaches around
37 °C.
Precipitation amounts to
85 mm, distributed over 6 days.
The day lasts on average 12 hours and 5 minutes.
There are on average 5.5 hours of sunshine per day. So, the sun shines 44% of the time.
The average humidity is 71%. Hence, the air is normally humid.
The average wind speed is of
5.7 kph.
October, the hottest month of the year, is generally a very hot, muggy month. The average temperature is of
27.8 °C, with a minimum of
22.3 °C and a maximum of
33.4 °C.
On the coldest nights of the month, the temperature usually drops to around
19 °C.
On the warmest days of the month, the temperature usually reaches around
36.5 °C.
Precipitation amounts to
155 mm, distributed over 10 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 43% of the time.
The average humidity is 79%. Hence, the air is normally humid.
The average wind speed is of
5.5 kph.
November is generally a warm to hot, muggy month. The average temperature is of
27.4 °C, with a minimum of
22.5 °C and a maximum of
32.4 °C.
On the coldest nights of the month, the temperature usually drops to around
19.5 °C.
On the warmest days of the month, the temperature usually reaches around
35.5 °C.
Precipitation amounts to
205 mm, distributed over 14 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 37% of the time.
The average humidity is 83%. Hence, the air is normally humid.
The average wind speed is of
5.5 kph.
December is generally a warm to hot, muggy month. The average temperature is of
27 °C, with a minimum of
22.6 °C and a maximum of
31.4 °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
34 °C.
Precipitation amounts to
265 mm, distributed over 18 days.
The day lasts on average 12 hours and 40 minutes.
There are on average 4 hours of sunshine per day. So, the sun shines 30% of the time.
The average humidity is 86%. Hence, the air is normally humid.
The average wind speed is of
5.6 kph.