Hi Hunz,
Yes pheros, do get affected by whether conditions, reason behind is, it directly affects the diffusion process of pheros.
Best method to increase effects (regarding whether conditions) : is to select those app points which helps you in best diffusion as per whether conditions. the ways which suits best in targeting your target.
for app points : Application points 101: a guide to where on the body to apply pheromones.
Would request you for additional info about urself so that we can help u in best product selection too. also posting additional information makes you eligible for 25 USD GC.
keep posting, take care