Temperature

T Ave.

T + 1

T + 2

Month

ETo  (mm/month)

January

73.2

75.9

78.9

February

79.8

82.8

85.8

March

98.7

102

105.6

April

124.5

128.4

132.3

May

137.1

141.3

145.5

June

151.2

155.7

159.9

July

164.4

169.2

173.7

August

167.7

172.5

177.3

September

149.1

153.3

157.8

October

121.8

125.7

129.6

November

95.1

98.4

101.4

December

80.7

83.4

86.4

Total

1443.3

1488,6

1534.2

Table 3: Reference evapotranspiration (ETo) respond to the temperature increase by 1 and 2oC on a monthly basis.