درجة الحرارة على الشاشة.

In Arabic, the verb to be is usually omitted in the present tense.

So درجة الحرارة على الشاشة literally looks like the temperature on the screen, but it means The temperature is on the screen.

This is called a nominal sentence. Arabic often says:

• الكتاب على الطاولة = The book is on the table
• الولد في البيت = The boy is at home

If you wanted was, will be, or something similar, Arabic would usually use a verb such as كان.

درجة الحرارة is a very common Arabic expression meaning temperature.

Literally, it is something like:

• درجة = degree
• الحرارة = the heat

So the phrase literally suggests the degree of heat, which corresponds to temperature.

This kind of noun combination is very common in Arabic.

This is because درجة الحرارة is an iḍāfa construction, often called a genitive construction or noun construct.

In an iḍāfa:

• the first noun normally does not take ال
• the second noun can take ال
• if the second noun is definite, the whole phrase becomes definite

So:

• درجة حرارة = a temperature / a degree of heat
• درجة الحرارة = the temperature

Even though درجة has no ال, the whole phrase is definite because الحرارة is definite.

على is a preposition that usually means on, on top of, or upon.

So:

• على الشاشة = on the screen

In this sentence, it tells you the location of درجة الحرارة.

It works much like English on in:

• on the table
• on the wall
• on the screen

This happens because ش is a sun letter.

When ال comes before a sun letter, the l sound of al- is not pronounced, and the following consonant is doubled.

So:

• ال + شاشة
• written: الشاشة
• pronounced: ash-shāsha

This is a pronunciation rule only. The spelling still keeps ال.

After a preposition like على, the noun is in the genitive case.

So in fully vowelled Arabic, الشاشة would be:

• الشاشةِ / ash-shāshati

In normal unvowelled writing, you usually do not see that final case ending, so it is simply written الشاشة.

This is very common in Modern Standard Arabic: the grammar is there, but everyday writing often leaves the short vowels unwritten.

The ة is called tāʾ marbūṭa. It often marks feminine nouns.

So:

• درجة is feminine
• الحرارة is also feminine

A useful thing to know is that ة is pronounced differently depending on context:

• at the end of a pause, it often sounds like -a or -ah
• in an iḍāfa or when case endings are pronounced, it can sound like -t

That is why درجة الحرارة is often pronounced approximately as:

• darajat al-ḥarāra

The t sound in درجة appears clearly because it is linked to the next word in the iḍāfa.

It is singular.

Grammatically:

• درجة is a singular noun
• الحرارة is also singular

Together, the phrase refers to temperature as one concept, not multiple temperatures.

So even though English learners may focus on the word degree, the full Arabic expression functions as the normal singular term for temperature.

It could be understood either way, depending on context.

As a full sentence, it can mean:

• The temperature is on the screen

But in real life, especially on signs, menus, interfaces, or captions, Arabic often uses short noun phrases without full sentence structure. So it could also function more like:

• Temperature on screen
• Screen temperature
  depending on the situation

Context usually tells you whether it is a complete statement or just a label.

Yes, Arabic can sometimes change the order for emphasis.

The version you have:

• درجة الحرارة على الشاشة

is the most straightforward if you want to present the temperature first and then say where it is.

You could also sometimes see:

• على الشاشة درجة الحرارة

This gives more emphasis to on the screen, somewhat like On the screen is the temperature in English.

Both are possible in the right context, but the original order is simpler and more neutral for a learner.