Jessi: The pictures don't, to me, indicate a serious issue. It is not uncommon that in a cold winter, to get some leaf tip dieback. Same symptom can come from weather that is too hot for an exposed plant in the summer. It is not serious. 

Rhodes are kind of picky in what locations they prefer (some shade, especially from afternoon sun when it is the hottest time of day and well-drained soil). 

There is another possible problem that is not easy to confirm from your pictures. If you look on the underside of the leaves and see a fair number of small black "drops" there, it is from feeding of the azalea/rhodie lace bug. They are hard to control and can lead to leaves that look "drained" of chlorophyll. Plants don't usually die but can look sickly green/yellow.  

You should fertilize now with rhododendron appropriate fertilizer. These have mainly nitrogen and should be sprinkled under the plant from the drip-line in towards the stem when there will be rain or irrigation to dissolve it and move it into the soil for root uptake. You can sometimes see a significant intensification in the deep green coloration of the leaves fairly quickly.  

The most fatal rhodie problem is root rot. It is common in rhodies planted where the soil drainage is poor (heavy clay in an area where it tends to stay wet for most of the winter/spring). We have a lot of land that is like that. It can be worse on fairly new construction when the topsoil is often largely removed before the house is built. Only solution for this is to move the plant to a better spot. 

I hope this helps. Feel free to contact me through this Ask Extension system or directly at <personal data hidden> 

Chip Bubl OSU Extension Agent/Columbia County (recently retired)