What does the start of the Wasm season mean?

Written By سنان خلف on 2025/10/14

This article was written originally in Arabic and is translated using a 3rd party automated service. ArabiaWeather is not responsible for any grammatical errors whatsoever.

Arab Weather - One of the most important and beautiful seasons in the Arabian Peninsula begins on October 16th of each year: the Wasm season. It marks the beginning of the rainy season and is a good omen for farmers and desert adventurers.

Why is it called a tag?

The season is named thus because the rains that fall during it “mark” the land with vegetation, leaving a mark of goodness and growth on it. The land begins to turn green and life returns to it after the long months of summer drought. The Wasm season lasts for approximately 52 days, from mid-October to early December.

Prevailing weather systems during the Wasm season

During the Wasm season, the atmosphere over the Kingdom witnesses a gradual change in weather systems. Cold depressions begin to move toward the region, and summer heat depressions weaken, paving the way for the onset of the rainy season.

Mediterranean depressions:

It begins to move towards the north and west of the Kingdom, causing cumulus clouds to form and rainfall to fall on areas such as Tabuk, Medina, Hail, Qassim, and northern Riyadh.

Seasonal lows recede:

Especially the Indian monsoon low, which weakens towards the end of summer, allowing cold air masses to advance from the north into the Kingdom's atmosphere.

Siberian High:

It gradually begins to affect the season, bringing with it cold, dry air from the northeast, leading to a drop in temperatures, especially during the night and early morning.

Wet masses coming from the Arabian Sea and the Red Sea:

These air masses interact with cold lows to produce thunderstorms and sometimes heavy rain, especially in the southwestern highlands and the regions of Makkah and Madinah.