What temp to rejet?

some say one jet size for every 10 degreese.. but thats to much... summer to winte ri normally jump 3 up for winter and 3 down for summer... bigger for winter.. cold air is more dense so need more fuel
 
Well my blaster is stock and summer time i used a 230(stock)

But when winter came i put a 240 in.

but now its starting to warm up again so i was wondering should i put my 230 back in or...

anything under 30 degrees?

its in the high 40's this week