My worm farm used to live on the south side of the house tucked in behind the water tank, where it was never in direct sun.
After a summer’s day some years ago when the temperature went over 40 C, I discovered all the worms had died. Even though they were in shade, the ambient temperature was apparently just too high. So I installed them under the house where the temperature is lower and doesn’t fluctuate so wildly. It was a good move as 40+ temperatures seem to be the norm in summer now.
There are two worm farms under the house now, both the round, plastic, commercial variety :
I leave the taps permanently open and the worm juice drips into ice-cream containers. The bucket with the sieve on top is to sieve out any drowned worms or other debris. The worm juice is transferred to a 50 litre plastic drum for storage :
I use it diluted about 50/50, mainly to water seedlings but will occasionally add a jugful to a wicking box.
The worms work in conjunction with the composting toilet. Each month a bin from the toilet (which has already been sitting in the system composting for 6 months), gets emptied into a compost bay down the back, a tray of worm castings plus worms gets tipped on top and the whole lot is covered in mulched bracken and kept moist. Even though the stuff from the composting toilet is unrecognisable by this stage, the worms go through it and produce a beautiful friable compost.
A worm farm is an essential part of an organic food garden.