Brazil's coffee belt will gradually warm up this week after a chilly start on Monday, private meteorologists Somar said today.
Temperatures dropped to a low of 4 Celsius (39 Fahrenheit) in northern Parana Sunday night as a mass of polar air passed over southern Brazil. In south Minas, lows of 7 C (45 F) were recorded.
"As expected, the centre of the polar mass passed south of coffee areas and did not cause any damage to coffee trees," Somar said in a daily report.
It added that temperatures will slowly rise and the weather will be drier this week, aiding harvesting.
Somar said that no significant cold weather fronts were expected to move into coffee areas until at least June 28.
Winter officially starts in Brazil on June 21.
Traders said they are mainly concerned about delays to Brazil's coffee harvest, caused by persistent and unseasonal rains, which resulted in a shortage of supplies.
South Minas has already had around 50 percent more than its monthly rainfall average for June and south-west Sao Paulo has had its monthly average.
The weather is usually dry during the May to September harvest but south Minas had double the monthly average of rain in May and Varginha has already exceeded the June average.