היום מעונן, ויש גשם ורוח.

In Hebrew, the verb to be is usually left out in the present tense.

So:

• היום מעונן literally looks like today cloudy
• but it means Today is cloudy or It is cloudy today

This is completely normal Hebrew. In the past or future, forms of היה are used instead.

It can mean either, depending on context.

• היום literally is the day
• but very often it is used as the adverb today

In this sentence, the natural meaning is today, because it is introducing today’s weather.

Because מעונן agrees with what is being described, and here the sentence is built around היום.

• יום = day
• יום is a masculine singular noun
• so the adjective is also masculine singular: מעונן

If the noun were feminine, the adjective would usually change form.

מעונן means cloudy or overcast.

It is related to ענן, which means cloud. So it is a weather adjective meaning that the sky is full of clouds.

ויש is made of two parts:

• ו־ = and
• יש = there is / there are

So ויש גשם ורוח means:

• and there is rain and wind
• more naturally in English: and there is rain and wind or and it’s rainy and windy

Because יש works for both there is and there are in present-tense Hebrew.

So Hebrew says:

• יש גשם = there is rain
• יש עננים = there are clouds
• יש גשם ורוח = there is/are rain and wind

Unlike English, Hebrew does not change יש for singular vs. plural in this kind of sentence.

Because they are being used in a general, indefinite way.

Here the sentence means that the weather includes:

• rain
• wind

not specifically:

• the rain
• the wind

This is very common with weather words and other general conditions.

In Modern Hebrew, רוח is usually treated as feminine.

But in this sentence, that does not affect anything, because רוח comes after יש, and there is no adjective here agreeing with it.

You would see the gender more clearly in a phrase like:

• רוח חזקה = strong wind

where חזקה is the feminine form of strong.

The comma separates two connected parts:

1. היום מעונן = Today is cloudy
2. ויש גשם ורוח = and there is rain and wind

So the comma helps show that the speaker first gives one weather description, then adds another. It is similar to how English might write:

• Today is cloudy, and there is rain and wind.

A simple pronunciation guide is:

ha-YOM me-u-NAN, ve-YESH GE-shem ve-RU-aḥ

A few notes:

• היום = ha-YOM
• מעונן = me-u-NAN
• ויש = ve-YESH
• גשם = GE-shem
• רוח = RU-aḥ
  The last sound in רוח is a throaty ḥ sound, not a regular English h.

Yes. Hebrew has several natural ways to describe weather.

For example:

• היום מעונן = Today is cloudy
• יש גשם = There is rain / It is raining
• יש רוח = There is wind / It is windy

The given sentence combines these ideas into one fuller description:

• היום מעונן, ויש גשם ורוח.

That is a normal and understandable way to say it.