I have 3 succulents (haworthia retusa, echeveria perle von nurnberg, and rhipsalis cereuscula) that grew and thrived in the sunny window at my old apartment. However, I recently moved and none of my windows in my new apartment let in enough light. The best place for them to get sunlight is out on my uncovered balcony. My balcony gets some sunlight for a few hours a day in the afternoon. This wouldn't be a problem except we are entering the rainy season now and it pours for a few hours every day, sometimes at unexpected times (ie the weather app says it will rain but it doesn't. Then the weather app says it won't rain and it does). I have just been bringing them inside and outside depending on the weather, but it's hard to plan for it especially when I'm out of the house for work or gone for a weekend. In those cases, just to play it safe, I bring the plants back inside so they don't get rained on but I worry they don't get enough sunlight. What can I do about this?

Alternatively, I was thinking about putting the plants into a covered outdoor terrarium (like this one from Ikea that I uploaded in the photos). The plants are currently individually potted, and I was thinking about just placing those 3 pots directly into the terrarium. The 3 plants have different watering schedules so I didn't want to plant them in soil together in the terrarium. Then I would just leave the terrarium outside always so they can maximize sunlight and not get rained on. Would this be a feasible solution? Or will the glass of the terrarium magnify the heat too much or create too humid conditions for the plants? Thanks!

like this one from Ikea that I uploaded in the photos

no photos added.

I just added the photo

Personally I think it would be as you said "the glass of the terrarium magnify the heat too much or create too humid conditions for the plants".

I would not use a terrarium either on any of your plants. All your plants does not like excessive humid conditions. As you already mentioned your area gets intermittent rains, so more rains..more humid.

Does your balcony have an overhang? If there is an overhang, that should be enough to shelter your plants...as long as you also make the succulent very gritty and well draining. I do not know the size of your plants, so if they are still small, make sure containers are shallow and wide mouth. Putting them outdoors on your balcony is still a better location, since there will be more airflow around the plants. It may get humid, but it gets more air exposure and the combined light/heat will help in its dry out time.

If you want you can make a mesh screen to also partially cover your plants in the afternoon if that is a west or south facing orientation.

What if I open the top of the terrarium and only close it when it rains?

I have a slight overhang but I don't really think it's sufficient to protect the plants from getting rained on. When it rains, it pours and the wind can blow the rain in a sideways direction sometimes. The plants are pretty small, about 2-3 inches in height each. And I'm not sure about the mesh to cover the plants because I don't want to block the sunlight. They're not getting enough sunlight as it is already

Many succulents do not like intense heat of the sun. Some actually just prefers bright light and warm, dry conditions.

There is a difference in handling during summer. Just a reminder our growing areas differ and our summer conditions are different. My area is zero rainfall during summer..your area has more rains so your humidity levels will be higher. When it rains I would say your humidity levels goes up to the 80% to 100% range...compared to my area where we only get 35% to 0% depending on the heat intensity and windy conditions we get. I would suggest then that you
make sure your media is grittier, like 70% pumice and 30% cacti mix. Make sure the base of your plant stays dry, so a good top dressing of pumice will help, since you have more rainfall.

If it is already in forecast that you will have days of torrential rain, then you have no choice but move them indoors, and position your plants by your balcony sliding door. Or just grow them indoors by your balcony door so they all still get good light, make quarter turns every week to even out light distribution on your plant..and practice watering intervals since growing indoors, evaporation time takes longer..and your humidity levels remain high. Or you can also augment lighting needs with a grow light.

As always, make sure all your containers have drain holes.

@tarev
I have a situation, that is similiar to yours. All of my plants have to live outdoors. I'm in Florida, so my tropical plants love it, but my cacti and succulents, that's a problem for them.
The first thing I did was pot them in extremely well-draining soil. I have some in pots that are way too heavy and large to move and since the soil drains so quickly and due to their large size, they have been able to survive the rainy season here.
The soil I use is some sandy garden soil that is actually my garden soil (but potting mix for cacti and succulents will work as long as you amend it). I mix in a heavy dose of perlite and crushed granite.. After my plants are settled in their pots, I top it off with crushed granite. I buy the crushed granite at Tractor Supply, its sold to mix in with chicken feed.

Second, I purchased some small portable plastic greenhouses. They have a variety of different kinds and sizes. Mine have a zipper to close and flaps for ventilation they are also small enough to drop over the plants in a pinch. But, I stopped using them when I repotted my plants with a super well draining mix.
When the rainy season is over, I do need to water my cacti and succulents more often than is normally recommended. But, it has really surprised me how well they are tolerating the rain now.
It's not a perfect solution, but I hope it helps a little.

I apologize @tarev the above message was directed to @sarahbi876

Can you assemble the terrarium but leave out some side glass? Then have a clear roof but more air movement.