Climate - Ribeirao Preto (Brazil)

The climate of Ribeirão Preto is tropical, with a relatively cool and dry season from June to August, and a hot and rainy season from November to March.
The city is located in southern Brazil, in the state of São Paulo, at 21 degrees south latitude and 570 meters (1,870 feet) above sea level.
From June to August, the dry period, is the winter of the southern hemisphere, and in fact the temperature decreases, especially at night. During this period, there can sometimes be outbursts of cold air from the south, and the temperature can drop below 5 °C (41 °F) at night and below 15 °C (59 °F) during the day.
Instead, from mid-August the temperature begins to rise, and until November, before the wettest period, the highest values of the year can be reached. However, it can sometimes be very hot even in summer and autumn, from November to April.

The average temperature of the coldest month (June) is of 19.6 °C (67.3 °F), that of the warmest month (December) is of 25.9 °C (78.7 °F). Here are the average temperatures.
Precipitation amounts to 1390 millimeters (54.7 inches) per year: it is therefore quite abundant. It ranges from 15 mm (0.6 in) in the driest months (July, August) to 265 mm (10.4 in) in the wettest one (January). Here is the average precipitation.
The sea temperature ranges from 23.5 °C (23.5 °F) in July, August, September to 27 °C (27 °F) in March. Here are the average sea temperatures.
On average, there are around 2530 sunshine hours per year. Here are the average sunshine hours per day.

Ribeirao Preto - Weather by month

Based on the period 1992-2009
(January - February - March - April - May - June - July - August - September - October - November - December)

In January, the average temperature is of 25.6 °C (78 °F), with a minimum of 21.3 °C (70.4 °F) and a maximum of 29.8 °C (85.7 °F).
On the coldest nights of the month, the temperature usually drops to around 19 °C (66.5 °F). However, in January 2001, it dropped to 17 °C (62.6 °F).
On the warmest days of the month, the temperature usually reaches around 34 °C (93.5 °F). However, in January 1998, it reached 35 °C (95 °F).
Precipitation amounts to 265 mm (10.4 in), distributed over 18 days.
The average humidity is 80%.
The average wind speed is 8 kph (5 kph).

In February, the average temperature is of 25.7 °C (78 °F), with a minimum of 21.3 °C (70.3 °F) and a maximum of 30 °C (86 °F).
On the coldest nights of the month, the temperature usually drops to around 19 °C (66.5 °F). However, in February 2000, it dropped to 17 °C (62.6 °F).
On the warmest days of the month, the temperature usually reaches around 34.5 °C (94.5 °F). However, in February 1998, it reached 36 °C (96.8 °F).
Precipitation amounts to 210 mm (8.3 in), distributed over 14 days.
The average humidity is 78%.
The average wind speed is 7 kph (4 kph).

In March, the average temperature is of 25.3 °C (78 °F), with a minimum of 20.6 °C (69 °F) and a maximum of 30 °C (86 °F).
On the coldest nights of the month, the temperature usually drops to around 18 °C (64 °F). However, in March 1997, it dropped to 16 °C (60.8 °F).
On the warmest days of the month, the temperature usually reaches around 34.5 °C (94 °F). However, in March 1998, it reached 37 °C (98.6 °F).
Precipitation amounts to 160 mm (6.3 in), distributed over 14 days.
The average humidity is 77%.
The average wind speed is 6 kph (4 kph).

In April, the average temperature is of 23.4 °C (74 °F), with a minimum of 18 °C (64.5 °F) and a maximum of 28.7 °C (83.6 °F).
On the coldest nights of the month, the temperature usually drops to around 13 °C (55.5 °F). However, in April 1995, it dropped to 11 °C (51.8 °F).
On the warmest days of the month, the temperature usually reaches around 32.5 °C (90.5 °F). However, in April 2007, it reached 35 °C (95 °F).
Precipitation amounts to 65 mm (2.6 in), distributed over 6 days.
The average humidity is 74%.
The average wind speed is 7 kph (4 kph).

In May, the average temperature is of 20.6 °C (69 °F), with a minimum of 15 °C (59.1 °F) and a maximum of 26.2 °C (79.2 °F).
On the coldest nights of the month, the temperature usually drops to around 9.5 °C (49.5 °F). However, in May 1999, it dropped to 7 °C (44.6 °F).
On the warmest days of the month, the temperature usually reaches around 30.5 °C (87 °F). However, in May 2001, it reached 34 °C (93.2 °F).
Precipitation amounts to 60 mm (2.4 in), distributed over 5 days.
The average humidity is 74%.
The average wind speed is 6 kph (4 kph).

In June, the coldest month of the year, the average temperature is of 19.6 °C (67 °F), with a minimum of 13.2 °C (55.7 °F) and a maximum of 26.1 °C (79 °F).
On the coldest nights of the month, the temperature usually drops to around 7 °C (44 °F). However, in June 2009, it dropped to 4 °C (39.2 °F).
On the warmest days of the month, the temperature usually reaches around 30 °C (86.5 °F). However, in June 2001, it reached 32 °C (89.6 °F).
Precipitation amounts to 25 mm (1 in), distributed over 3 days.
The average humidity is 70%.
The average wind speed is 7 kph (4 kph).

In July, the average temperature is of 20.5 °C (69 °F), with a minimum of 13.3 °C (55.9 °F) and a maximum of 27.8 °C (82 °F).
On the coldest nights of the month, the temperature usually drops to around 8 °C (46.5 °F). However, in July 2000, it dropped to 3 °C (37.4 °F).
On the warmest days of the month, the temperature usually reaches around 32 °C (89.5 °F). However, in July 1998, it reached 34 °C (93.2 °F).
Precipitation amounts to 15 mm (0.6 in), distributed over 2 days.
The average humidity is 62%.
The average wind speed is 7 kph (5 kph).

In August, the average temperature is of 22.6 °C (73 °F), with a minimum of 15.1 °C (59.2 °F) and a maximum of 30.2 °C (86.3 °F).
On the coldest nights of the month, the temperature usually drops to around 10.5 °C (50.5 °F). However, in August 1999, it dropped to 6 °C (42.8 °F).
On the warmest days of the month, the temperature usually reaches around 35 °C (94.5 °F). However, in August 2006, it reached 37 °C (98.6 °F).
Precipitation amounts to 15 mm (0.6 in), distributed over 3 days.
The average humidity is 52%.
The average wind speed is 9 kph (5 kph).

In September, the average temperature is of 24.1 °C (75 °F), with a minimum of 17.4 °C (63.4 °F) and a maximum of 30.7 °C (87.3 °F).
On the coldest nights of the month, the temperature usually drops to around 12 °C (53 °F). However, in September 2006, it dropped to 7 °C (44.6 °F).
On the warmest days of the month, the temperature usually reaches around 36.5 °C (97.5 °F). However, in September 2006, it reached 38 °C (100.4 °F).
Precipitation amounts to 60 mm (2.4 in), distributed over 6 days.
The average humidity is 58%.
The average wind speed is 10 kph (6 kph).

In October, the average temperature is of 25.6 °C (78 °F), with a minimum of 20 °C (68 °F) and a maximum of 31.2 °C (88.1 °F).
On the coldest nights of the month, the temperature usually drops to around 16 °C (61 °F). However, in October 1993, it dropped to 13 °C (55.4 °F).
On the warmest days of the month, the temperature usually reaches around 37 °C (98.5 °F). However, in October 2008, it reached 39 °C (102.2 °F).
Precipitation amounts to 105 mm (4.1 in), distributed over 10 days.
The average humidity is 64%.
The average wind speed is 9 kph (6 kph).

In November, the average temperature is of 25.1 °C (77 °F), with a minimum of 20.1 °C (68.1 °F) and a maximum of 30.1 °C (86.2 °F).
On the coldest nights of the month, the temperature usually drops to around 16 °C (61 °F). However, in November 1995, it dropped to 14 °C (57.2 °F).
On the warmest days of the month, the temperature usually reaches around 35 °C (94.5 °F). However, in November 1994, it reached 36 °C (96.8 °F).
Precipitation amounts to 175 mm (6.9 in), distributed over 13 days.
The average humidity is 70%.
The average wind speed is 9 kph (6 kph).

In December, the average temperature is of 25.9 °C (79 °F), with a minimum of 21.1 °C (70 °F) and a maximum of 30.7 °C (87.3 °F).
On the coldest nights of the month, the temperature usually drops to around 17.5 °C (64 °F). However, in December 2001, it dropped to 14 °C (57.2 °F).
On the warmest days of the month, the temperature usually reaches around 34.5 °C (94 °F). However, in December 2007, it reached 36 °C (96.8 °F).
Precipitation amounts to 235 mm (9.3 in), distributed over 16 days.
The average humidity is 75%.
The average wind speed is 8 kph (5 kph).