Climate - Petrolina (Brazil)

Petrolina's climate is tropical semi-arid, with a relatively rainy season from January to March and a dry season from May to October.
The city is located in the state of Pernambuco, 380 meters (1,245 feet) above sea level, on the banks of the São Francisco River. Across the river lies the city of Juazeiro. To the west of the city the river widens into the Lago de Sobradinho, a lake created by a dam built in the 1970s.
We are in the north-east of Brazil, the driest area of the country. The sun shines very often, even almost 3,000 hours a year.
Temperatures drop a bit in the austral winter, from June to August.

Petrolina - Climate data

In Petrolina, the average temperature of the coldest month (July) is of 25.2 °C (77.4 °F), that of the warmest month (November) is of 29.1 °C (84.4 °F). Here are the average temperatures.
In Petrolina, precipitation amounts to 485 millimeters (19.1 inches) per year: it is therefore quite scarce. It ranges from 1 mm (0 in) in the driest month (August) to 115 mm (4.5 in) in the wettest one (March). Here is the average precipitation.
In Petrolina, there are on average around 2995 sunshine hours per year. Here are the average hours of sunshine per day.

Petrolina - Weather by month

Based on the period 1991-2020

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In January, the weather in Petrolina is usually very hot. The average temperature is of 28.6 °C (83 °F), with a minimum of 23.6 °C (74.4 °F) and a maximum of 33.7 °C (92.6 °F).
On the coldest nights of the month, the temperature usually drops to around 21 °C (70.5 °F).
On the warmest days of the month, the temperature usually reaches around 36.5 °C (97.5 °F).
Precipitation amounts to 90 mm (3.5 in), distributed over 6 days.
The day lasts on average 12 hours and 35 minutes.
There are on average 8 hours of sunshine per day. So, the sun shines 64% of the time.
The average humidity is 54%.
The average wind speed is 13 kph (8 mph).

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In February, the weather in Petrolina is usually very hot. The average temperature is of 28.7 °C (84 °F), with a minimum of 23.7 °C (74.6 °F) and a maximum of 33.7 °C (92.7 °F).
On the coldest nights of the month, the temperature usually drops to around 21.5 °C (70.5 °F).
On the warmest days of the month, the temperature usually reaches around 36.5 °C (97.5 °F).
Precipitation amounts to 90 mm (3.5 in), distributed over 6 days.
The day lasts on average 12 hours and 25 minutes.
There are on average 8 hours of sunshine per day. So, the sun shines 64% of the time.
The average humidity is 56%.
The average wind speed is 13 kph (8 mph).

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In March, the weather in Petrolina is usually very hot. The average temperature is of 28.7 °C (84 °F), with a minimum of 23.7 °C (74.7 °F) and a maximum of 33.7 °C (92.6 °F).
On the coldest nights, the temperature usually drops to around 21.5 °C (71 °F).
On the warmest days, the temperature usually reaches around 36.5 °C (97.5 °F).
Precipitation amounts to 115 mm (4.5 in), distributed over 7 days.
The day lasts on average 12 hours and 5 minutes.
There are on average 7.5 hours of sunshine per day. So, the sun shines 62% of the time.
The average humidity is 58%.
The average wind speed is 12 kph (7 mph).

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In April, the weather in Petrolina is usually very hot. The average temperature is of 28.1 °C (83 °F), with a minimum of 23.4 °C (74.1 °F) and a maximum of 32.9 °C (91.2 °F).
On the coldest nights, the temperature usually drops to around 20.5 °C (69.5 °F).
On the warmest days, the temperature usually reaches around 35.5 °C (96 °F).
Precipitation amounts to 45 mm (1.8 in), distributed over 3 days.
The day lasts on average 11 hours and 55 minutes.
There are on average 8 hours of sunshine per day. So, the sun shines 66% of the time.
The average humidity is 59%.
The average wind speed is 13 kph (8 mph).

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In May, the weather in Petrolina is usually warm to hot. The average temperature is of 27.2 °C (81 °F), with a minimum of 22.5 °C (72.4 °F) and a maximum of 31.9 °C (89.4 °F).
On the coldest nights, the temperature usually drops to around 19 °C (66.5 °F).
On the warmest days, the temperature usually reaches around 34.5 °C (94.5 °F).
Precipitation amounts to 13 mm (0.5 in), distributed over 2 days.
The day lasts on average 11 hours and 40 minutes.
There are on average 7.5 hours of sunshine per day. So, the sun shines 64% of the time.
The average humidity is 59%.
The average wind speed is 15 kph (9 mph).

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In June, the weather in Petrolina is usually warm to hot. The average temperature is of 26.0 °C (79 °F), with a minimum of 21.3 °C (70.3 °F) and a maximum of 30.8 °C (87.5 °F).
On the coldest nights, the temperature usually drops to around 18.5 °C (65 °F).
On the warmest days, the temperature usually reaches around 34 °C (93 °F).
Precipitation amounts to only 6 mm (0.2 in), distributed over 2 days.
The day lasts on average 11 hours and 35 minutes.
There are on average 7.5 hours of sunshine per day. So, the sun shines 63% of the time.
The average humidity is 59%.
The average wind speed is 16 kph (10 mph).

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In July, the coldest month of the year, the weather in Petrolina is usually warm to hot. The average temperature is of 25.2 °C (77 °F), with a minimum of 20.3 °C (68.5 °F) and a maximum of 30.2 °C (86.4 °F).
On the coldest nights of the month, the temperature usually drops to around 16.5 °C (62 °F).
On the warmest days of the month, the temperature usually reaches around 33 °C (91.5 °F).
Precipitation amounts to only 4 mm (0.2 in), and all occurs in one day.
The day lasts on average 11 hours and 35 minutes.
There are on average 8 hours of sunshine per day. So, the sun shines 67% of the time.
The average humidity is 56%.
The average wind speed is 17 kph (11 mph).

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In August, the weather in Petrolina is usually warm to hot. The average temperature is of 25.8 °C (78 °F), with a minimum of 20.5 °C (68.9 °F) and a maximum of 31.2 °C (88.1 °F).
On the coldest nights of the month, the temperature usually drops to around 18 °C (64 °F).
On the warmest days of the month, the temperature usually reaches around 34 °C (93.5 °F).
Precipitation amounts to only 1 mm (0 in), distributed over 0 days.
The day lasts on average 11 hours and 50 minutes.
There are on average 8.5 hours of sunshine per day. So, the sun shines 74% of the time.
The average humidity is 52%.
The average wind speed is 18 kph (11 mph).

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In September, the weather in Petrolina is usually warm to hot. The average temperature is of 27.4 °C (81 °F), with a minimum of 21.7 °C (71.1 °F) and a maximum of 33 °C (91.5 °F).
On the coldest nights, the temperature usually drops to around 19 °C (66 °F).
On the warmest days, the temperature usually reaches around 36 °C (97 °F).
Precipitation amounts to only 3 mm (0.1 in), distributed over 0 days.
The day lasts on average 12 hours and 5 minutes.
There are on average 9 hours of sunshine per day. So, the sun shines 76% of the time.
The average humidity is 47%.
The average wind speed is 18 kph (11 mph).

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In October, the weather in Petrolina is usually very hot. The average temperature is of 28.7 °C (84 °F), with a minimum of 23 °C (73.5 °F) and a maximum of 34.4 °C (93.9 °F).
On the coldest nights, the temperature usually drops to around 21 °C (69.5 °F).
On the warmest days, the temperature usually reaches around 37 °C (99 °F).
Precipitation amounts to 11 mm (0.4 in), and all occurs in one day.
The day lasts on average 12 hours and 20 minutes.
There are on average 9 hours of sunshine per day. So, the sun shines 75% of the time.
The average humidity is 45%.
The average wind speed is 17 kph (10 mph).

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In November, the warmest month of the year, the weather in Petrolina is usually very hot. The average temperature is of 29.1 °C (84 °F), with a minimum of 23.7 °C (74.7 °F) and a maximum of 34.5 °C (94.2 °F).
On the coldest nights, the temperature usually drops to around 21.5 °C (70.5 °F).
On the warmest days, the temperature usually reaches around 38 °C (100 °F).
Precipitation amounts to 50 mm (2 in), distributed over 4 days.
The day lasts on average 12 hours and 35 minutes.
There are on average 9 hours of sunshine per day. So, the sun shines 70% of the time.
The average humidity is 49%.
The average wind speed is 15 kph (9 mph).

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In December, the warmest month of the year, the weather in Petrolina is usually very hot. The average temperature is of 28.9 °C (84 °F), with a minimum of 23.7 °C (74.7 °F) and a maximum of 34.1 °C (93.4 °F).
On the coldest nights of the month, the temperature usually drops to around 21 °C (70.5 °F).
On the warmest days of the month, the temperature usually reaches around 37.5 °C (100 °F).
Precipitation amounts to 55 mm (2.2 in), distributed over 4 days.
The day lasts on average 12 hours and 40 minutes.
There are on average 8.5 hours of sunshine per day. So, the sun shines 67% of the time.
The average humidity is 52%.
The average wind speed is 14 kph (9 mph).