I've been mid feb 3 times and had different weather each one - snow, mild & wet! We like February (booked again for next year). Book dates as early as you can, we got an amazing price for Newport Bay Compass Club, hadn't seen it as cheap ever. Park normally shuts about 7 which means illuminations earlier, though also means not as many park hours. But not as busy so can get plenty done and then go have evening meal and a good nights sleep. I struggled when we did August as didn't leave park till gone 11pm.