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The State
receives both south-west and north-east monsoons. The mean annual rainfall is
2693 mm. The highest rainfall was recorded (5883 mm) at Neriamangalam and the
lowest (651 mm) at Chinnar in Idukki district. The southern parts of Kerala
experience comparatively higher rate of south west and north-east monsoon while
the northern districts of Kannur and Kasaragod receive very little rains from
the north-east monsoon. The western part of the State is facing the Arabian sea,
hence southwest monsoon is more active and accounts for 60 per cent of the
annual rainfall on an average. The number of rainy days varies from 45-172 in a
year. The mean annual temperature varies from 25.40C to 310C in the central
parts of Kerala, while the temperature drops to 150C in the hills. March-May are
summer months and the temperature raises to 400C in the central plains. The mean
relative humidity varies between 85-95 per cent during June and lowers to 70 per
cent in summer months. |
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