Years

Percentage (%)

Classes

SPEI-1

SPEI-3

SPEI-12

SPEI-1

SPEI-3

SPEI-12

Extremely wet (SPEI > 2)

1

2

1

2

3

2

Very wet (1.50 < SPEI < 1.99)

4

1

5

7

2

9

Moderately wet (1.00 < SPEI < 1.49)

11

8

9

19

14

15

Normal (−0.99 < SPEI < 0.99)

17

19.5

15.5

59

67

53

Moderately dry (−1 < SPEI < −1.49)

6

5

8

10

9

14

Very dry (−1.50 < SPEI < −1.99)

2

3

4

3

5

7

Extremely dry (SPEI < −2)

0

0

0

0

0

0