Dry and Wet Spells of Weather at Coimbatore

Abstract

During the pre-monsoon period comprising the months from January to May, the dry spell prevails on an average on 90'1% of the days. The mean rainfall during this period is 6'2", received on 11 rainy days. A continuous dry spell has prevailed for 132 days in the year 1914. In 34 out of 54 years no wot spell occurred during the pre-monsoon period. In the monsoon period from June to December, the mean duration of dry spell is 168 days covering 78-5% of the period. The mean rainfall is 18'9", received on 34 rainy days. Dry spell may prevail continuously for 46 days, when rainfall is abnormal and for 61 days when the rainfall is sub-normal during this period. During the monsoon period the mean number of rainy days is 344 and wet spells of three or more days occur on 12-5 days. Wet spells may occur for 25 days when rainfall is abnormal and for upto 20 days when rainfall is sub-normal. Considering the year as a whole the mean duration of dry spells is 304 days. The average rainfall is 25'1 and the number of rainy days is 455. The rainfall and number of rainy days are more closely associated with the wet spells prevailing during the monsoon period than during the pre-monsoon period.

DOI

https://doi.org/10.29321/MAJ.10.A03936

Pages

151 - 157

Creative Commons

Copyright

© The Author(s), 2025. Published by Madras Agricultural Students' Union in Madras Agricultural Journal (MAJ). This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium, provided the original work is properly cited by the user.

Keywords