Moisture meters poster
You want the wood in your shop to reach its equilibrium moisture content before you begin to use it. As humidity increases the moisture content in wood increases causing wood to expand. As humidity decreases the moisture content decreases causing the wood to shrink. Wood reaches its equilibrium moisture content when it neither gains nor loses moisture.
The best way to find out the moisture content in your lumber is with a moisture meter.
Download this handy poster that you can put up in your workshop for practical tips on moisture meters.