Education to the Core: Weather Pop-Up Book and Special Writing and Graphing Freebie! Great for getting kids engaged with your calendar block! Helping kids with graphing since there's no Montessori material for it
During a weather lesson, you might want to know how exactly to measure different things that deal with weather. This chart in particular, gives a great start to some of your most basic tools that are used to measure weather. You could add on others!