Do you love making things in creative mode? Perhaps you have a world specifically for creative mode - and perhaps you'd like it to always be day, as well as sunny. If so, then this simple gamerule and command block circuit will do just that. Note: This tutorial assumes that you are in creative, are able to use command blocks and have cheats enabled.

First of all, type these two commands (works best if you do it in order):

/gamerule doDaylightCycle false
(disables daylight cycle)

/time set 6000
(set the time to midday)

After you have done that, build the redstone circuit pictured. The comparator's torch must be down. In the command block, set the command to "/weather clear".

Whenever it rains, the light level will fall, making the daylight sensor's output weaker than the torch. This activates the command block which clears the weather. The time of the day must be around 6000 for the daylight sensor to emit the strongest signal (otherwise, the torch above the command block would never turn off). The entire circuit can be contained in a 2x4x2 area, including the blocks the comparator, torch and redstone dust is on.

This is a very simple and compact circuit, but it's quite useful for if you want to keep your creative world bright. I've seen many videos and posts on how to do this, but my method appears to be more compact and simple compared to the ones I've seen. What do you think of it? Are there any improvements I can make (not likely)? Feedback is appreciated.