WEATHER FOR FARMERS
THE ONSET OF THE MAJOR RAINY SEASON (2004):
Table 1: The mean dates, range and standard deviation for the onset of the major season are as follows:
SECTOR |
RANGE |
MEAN DATE
|
STANDARD DEV.
(DAYS)
|
NORTHERN (8° - 11ºN) |
23 RD MAY – 23 RD JUNE |
30 TH MAY |
±14 |
MIDDLE (6º - 8ºN) |
21 ST MARCH – 30 TH APRIL |
12 TH APRIL |
±10 |
COASTAL (4º - 6ºN) |
7 TH APRIL – 21 ST APRIL |
14 TH APRIL |
±10 |
Table 2: The mean dates and range for the end of the major season rains
SECTOR |
RANGE |
MEAN DATE |
STANDARD DEV.
(DAYS)
|
NORTHERN (8° - 11ºN) |
2 ND OCT. – 21 ST OCT. |
14 TH OCT. |
±15 |
MIDDLE (6º - 8ºN) |
14 TH JULY – 31 ST AUGUST |
31 ST JULY |
±30 |
COASTAL (4º - 6ºN) |
8 TH JULY – 14 TH AUGUST |
31 ST JULY |
±30 |
Table 3: The duration of the rains for the major rainy season.
SECTOR |
RANGE (DAYS) |
MEAN DURATION (DAYS)
|
STANDARD DEV.
(DAYS)
|
NORTHERN (8° - 11ºN) |
102 - 160 |
140 |
±15 |
MIDDLE (6º - 8ºN) |
93 - 165 |
130 |
±30 |
COASTAL (4º - 6ºN) |
79 - 130 |
105 |
±30 |
