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Climate of Sri Lanka

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Climate of Sri Lanka

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    1. Climate of Sri Lanka B.V.R. Punyawardena Head – Agro climatology Division Natural Resources Management Center Department of Agriculture Peradeniya

    2. Climate of Sri Lanka

    3. Rainfall Seasons in Sri Lanka First Intermonsoon ? March-April Southwest Monsoon ? May - September Second Intermonsoon ? October-November Northeast Monsoon ? December-February

    4. First Inter Monsoon (March-April)

    5. Southwest Monsoon (May-Sept)

    6. Second Inter Monsoon (Oct-Nov)

    7. Northeast Monsoon (Dec-Feb)

    8. Rainfall during different seasons

    10. Rainfall Two peaks (bi-modal) thus, 2 cultivation seasons Minor rainy season - Yala (March - August) Major rainy season - Maha (September - February) Yala season Convectional rains - FIM Southwest monsoon Maha season Convection rains - SIM Northeast monsoon rains disturbances, depressions, cyclones

    11. Monthly rainfall distribution of Sri Lanka

    14. Temperature Dry zone Annual Maximum 30 - 34 0C Annual Minimum 21 – 24 0C Intermediate zone – Low country Annual Maximum 30 - 34 0C Annual Minimum 20 – 22 0C Intermediate zone – Mid country Annual Maximum 22 - 32 0C Annual Minimum 19 – 22 0C Intermediate zone – Up country Annual Maximum 23 - 27 0C Annual Minimum 14 – 16 0C

    15. Temperature Wet zone – Low country Annual Maximum 30 - 33 0C Annual Minimum 21– 24 0C Wet zone – Mid country Annual Maximum 28 - 32 0C Annual Minimum 19 – 22 0C Wet zone – Up country Annual Maximum 18 - 22 0C Annual Minimum 11 – 14 0C Frost in UCWZ February - March

    16. Humidity Varies around 60 - 70% in day time and around 85 - 90% at night May to September Dry zone drops to 50 - 60% Kachchan

    17. Evaporation Marked seasonal variation of Epan across the island Wet zone highest during March and September ? 4 mm/day Dry zone highest during May to September ? 6 mm/day

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