Climate
The climate of Thiruvananthapuram district is generally hot tropical. The large forest reserves favourably affect the climate and induce rains. Cold weather is experienced in the mountain ranges, whereas lower down, the weather is bracing and is generally hot in the coastal regions. The mean maximum temperature is 95 °F (35 °C) and the mean minimum temperature is 69 °F (20 °C). As the district stretches from north to south with the Arabian Sea in the west side, the relative humidity is generally high. It rises up to about 95% during the South-West monsoon.
The total annual average rainfall in the district is about 1,500 mm (59 in) per annum. The southwest monsoon, from June to September is the principal rainy season. The district receives most of its annual rainfall in this season. The second rainy season is the Northeast monsoon. It is from October to November. The district also gets thunderstorm rains in the pre-monsoon months of April and May.
December to February are the coolest months. The average temperature goes down to 69 °F (20 °C) in these months. It is generally considered as the winter season. The summer season starts in February and continues until May. The average temperature goes up to 95 °F (35 °C) in these months.
| Climate data for Thiruvananthapuram | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °C (°F) | 37 (99) |
38 (100) |
38 (100) |
38 (100) |
38 (100) |
39 (102) |
38 (100) |
38 (100) |
33 (91) |
38 (100) |
37 (99) |
36 (97) |
39 (102) |
| Average high °C (°F) | 31.5 (88.7) |
31.9 (89.4) |
32.6 (90.7) |
32.6 (90.7) |
31.6 (88.9) |
29.7 (85.5) |
29.2 (84.6) |
29.4 (84.9) |
30.0 (86) |
29.9 (85.8) |
30.3 (86.5) |
31.0 (87.8) |
30.8 (87.4) |
| Average low °C (°F) | 22.2 (72) |
22.8 (73) |
24.1 (75.4) |
24.9 (76.8) |
24.7 (76.5) |
23.5 (74.3) |
23.1 (73.6) |
23.2 (73.8) |
23.3 (73.9) |
23.3 (73.9) |
23.1 (73.6) |
22.6 (72.7) |
23.4 (74.1) |
| Record low °C (°F) | 15 (59) |
17 (63) |
20 (68) |
20 (68) |
20 (68) |
21 (70) |
18 (64) |
20 (68) |
18 (64) |
20 (68) |
20 (68) |
20 (68) |
15 (59) |
| Precipitation mm (inches) | 22.7 (0.894) |
24.4 (0.961) |
40.4 (1.591) |
117.4 (4.622) |
230.4 (9.071) |
320.8 (12.63) |
226.8 (8.929) |
138.1 (5.437) |
174.6 (6.874) |
281.7 (11.091) |
184.5 (7.264) |
65.9 (2.594) |
1,827.7 (71.957) |
| Source #1: | |||||||||||||
| Source #2: | |||||||||||||
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