The arrival of Minecraft Beta 1.5 brought weather conditions. However, it can at times be inconvenient when you're trying to screenshot something and show it off (as it reduces lighting and obstructs your view slightly). Is there anyway to turn weather off?
Alternatively, is there a way to speed up the duration of weather or "skip" it?
To toggle off weather type in /gamerule doWeatherCycle false
If you simply want to enable a particular weather cycle for a near infinite amount of time, you can use the command /weather type time, for example if you want to have clear weather for a year, you could use /weather clear 9999999999.
Minecraft Java Edition allows suffixing with a unit, d and s to indicate in-game days and seconds respectively. The maximum allowed value for this duration is (2-2^-33)*2^127 or 340282346638528859811704183484516925440 so you could make the weather essentially permanent with:
/weather clear 340282346638528859811704183484516925440d
but a lower number is probably fine.
In Bedrock Edition, the number has a maximum value of 1000000 and you cannot use any unit suffixes.
This might be a little late, but.. I always use the command /time set 14000 (it's a default command). This command makes it completely dark, so you can use a bed. Most of the time the rain/snow is over when it's morning.
if you just want to turn it off, you just need to type in one of the following commands:
/weather clear
/toggledownfall
With zombe's modpack, you can control weather. ;)
If there is bad weather happening at night, a bed should help.
If you're not averse to a little cheating, the mod TooManyItems has recently added the ability to toggle weather.
There is no setting to turn this off, the only way to skip weather is as a side effect of sleeping through the night.
Of course if it's not night, or you don't have a bed, then you are stuck..
I wish Notch would add this option in, or at least allow for you to turn down the AMOUNT of rain, since I don't mind the fact that it happens, just the constant lag that it brings.
You can install Optifine, then you can disable it in the settings.(Works in 1.8.1)
To turn of rain, Type /toggledownfall while op'ed, if on a server.
Turning particle effects down to a minimum will reduce the amount of weather effects shown in game.
What I did was set the gamerule doDaylightCycle to false /gamerule DoDaylightCycle false This allowed me to use a daylight_detector and hook it up to a sticky piston with a redstone block on the end. 
When it starts to rain the daylight_detector will lessen in power and emit less in redstone strength and be unable to power the sticky piston. The sticky piston will deactivate pulling the redstone block with it, triggering the command /toggledownfall 
.The daylight_detector will sense the change in lighting and reactivate the sticky piston so it can once again clear up the weather.
Try exiting your game and then returning, it might help!
