Preferred playing hours: Between 6:00 PM and midnight, especially on Fridays, Saturdays, and Sundays.
Preferred weather: Cool or rainy—not because it directly improves your game, but because it tends to create a quieter environment with fewer distractions.
Most importantly: Only play when you're well-rested and able to concentrate. This has a much greater impact on your performance than the time of day or the weather.