Reduce impedance for power traces of a decoupling Cap when ground planes are not directly under
Your design seems accurate to me. 

I still have some suggestions for improvement: 


You could reduce the decoupling loop even more by moving the cap tighter to the SHTC3 sensor. 
The traces from the planes to the cap could be smaller to prevent heat transfer and they  should be as close as possible to each other to prevent inductive coupling. 
Please double check the ground pad of the SHTC3 (It could be required to have it connected to GND.)