International Journal of Scientific Research and Engineering Development

Weather data is a challenge for designing an air-conditioning system around the globe. The acquired hourly meteorological data for relative humidity and dry-bulb temperature for Abeokuta, Ibadan, Ikeja, Ondo, and Oshogbo, covering the period from 2013 to 2022, were digitised using Microsoft Excel. The digitised data were analysed to provide the appropriate outdoor design conditions of 1%, 2½% and 5% outdoor design temperature of the four warmest months, for the temperatures of dry and moist bulbs, and 0.4%, 1%, and 2% outdoor design temperature of the cumulative distribution function with their corresponding coincident relative humidity. The results of this study will provide updated information on outdoor design conditions for the selected South West cities in Nigeria, which will be useful for other locations in their proximity.

Awolola O.O, Ibiwoye M.O, Fasasi T.A,"Weather Data Analysis for Outdoor Design Conditions for Air Conditioning Systems in Selected Cities in South-West Nigeria" International Journal of Scientific Research and Engineering Development, V9(3): Page(671-678) May-June 2026. ISSN: 2581-7175. www.ijsred.com. Published by Scientific and Academic Research Publishing.