| 85.9 | 76.1 | 16 | 88 | 3 April| 89.6 | 78.9 | 16 | 92 | 3 May | 89.1 | 79.3 | 19 | 93 | 3 June | 90.0 | 79.5 | 19 | 94 | 3 July | 87.7 | 77.7 | 16 | 90 | 5 Aug.

| 87.9 | 77.4 | 16 | 91 | 4 Sept.| 89.3 | 77.8 | 18 | 93 | 2 Oct.

| 85.2 | 75.8 | 15 | 89 | 14 Nov.

| 81.O | 74.9 | 11 | 83 | 15 Dec.

| 80.1 | 74.3 | 11 | 82 | 15 Mean temperature for the year 81.4.] In the extreme north of the island, the peninsula of Jaffna, and the vast plains of Neura-kalawa and the Wanny, form a third climatic division, which, from the geological structure and peculiar configuration of the district, differs essentially from the rest of Ceylon.