I hate riding in rain, though I'll do it sometimes when necessary. But, DO NOT ride in severe weather. Find shelter and stay there until the storm passes. I got caught a in a bad thunderstorm last year, and the initial gust of wind actually took my breath away. Heavy rain and wind are not safe conditions for cycling. And since you live in Kansas you probably already know this, but "under a tree" is not safe shelter in a severe storm.
That being said, you can ride a road bike in the rain. You'll want to reduce the air pressure in your tires for better traction. Fenders can be helpful, and it's possible to get some that can be easily attached to a road bike. Mine are called Race Blades, and I think Planet Bike makes something similar. Be careful riding on painted lines on the road and metal objects (manhole covers) because they get slippery. Also be careful if there are wet leaves on the ground.
I'm sure others will have lots to add...
- Gray 2010 carbon WSD road bike, Rivet Independence saddle
- Red hardtail 26" aluminum mountain bike, Bontrager Evoke WSD saddle
- Royal blue 2018 aluminum gravel bike, Rivet Pearl saddle
Gone but not forgotten:
- Silver 2003 aluminum road bike
- Two awesome worn out Juliana saddles