In outdoors, rain is a blessing so you don't have to water them. Check the weather for the whole week and if the temp goes up the next day, you should be fine. If I were you, the safest bet when doing outdoors is prep you plants indoor meaning let them grow about a foot or two before you throw them outside.
i have all my others inside under flouresents just have the one as experiment i am a newbie its about 5 inches tall with second set of leaves on it now hope its ok tonight its not supposed to rain all that hard plus i put it under my tangerine tree against a wall