Wondering if this Apple Support article may help:
If your iPhone or iPad won't connect to a Wi-Fi network - Apple Support
Else:
Wondering if you use the wi-fi for other devices as well:
"Device doesn't connect or stay connected" is a symptom of wireless interference
See:
Resolve Wi-Fi and Bluetooth issues caused by wireless interference – Apple Support
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Re: Do I need to clean out my temporary storage? If so how would I do this?
Seems unlikely lack of memory / storage space would make wi-fi quit.
I could be wrong.
You might want to check whether iPad's storage space is an issue:
How to check the storage on your iPhone and iPad - Apple Support
Tips on Managing storage space:
If you need more space for an update on your iPhone, iPad, or iPod touch - Apple Support
For website data, etc.
Please be aware that access to some websites may change if all cookies are deleted.
How to: Clear the history and cookies from Safari on your iPhone, iPad, or iPod touch - Apple Support
All the best :-)