Relative humidity fluctuated
between 74.2 % and 87.9 %, with exception of April,
May, and June 2011, when it oscillated between 27.2
% and 30.2 %. In 2009, April and May were the driest
months (2 mm); in 2010, March was the driest month
(2 mm); in 2010, March was the driest month (2 mm),
while greatest rainfall was in September (584.6 mm);
in 2011, from February to April was present drought,
while from June to November was the rainiest period
(323 mm); in 2012, March did not exceed 4 mm of
rain, as shown in Figure 1.