Happened to me also in the same weather condition, after a few weeks, started to notice something weird during starting, I ignored it since 1 year old plus pa lang battery and it is not the usual sign I encounter on a failing battery, ayun, the next week, it failed without warning, umandar sya from parking then when I gassed up a few kms away, the engine won't turn on again. Hassle. From ATC parking to Petron Commerce Av, dedbol.