June climate stats show an average month for most in both daily average temperature and precipitation. Northwest Montana and parts of north-central Idaho would be two locations that did have a wet month as demonstrated by the departure from normal precipitation graph.
Source: https://www.facebook.com/NWSMissoula/posts/pfbid0Fm57WXaqZaZsyEXD5po1gqs7pi38EZ9YWGKg9JPTjSiAcjKYL5t5C8NE2TxoXMwWl