Climate Overview
The climate in As Sulayyil is hot. The average annual temperature is 29°C and approximately 27mm of precipitation falls per year. April is the wettest month, receiving around 14mm of rainfall. As Sulayyil is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are January, December, February, when temperatures can drop to 11°C.
Temperature
Temperatures in As Sulayyil vary considerably across the year, with a 33°C difference between the coldest and warmest months. July is the hottest month, with daytime highs reaching 44°C and an average of 38°C. January is the coolest month, with minimum temperatures around 11°C and an average of 18°C. On average, daily temperatures fluctuate by about 13°C between overnight lows and afternoon highs. The sharpest temperature change occurs between September and October, with a 6°C shift in average temperatures.
Precipitation
As Sulayyil is a quite dry location, receiving approximately 27mm of precipitation annually, which averages out to around 2mm per month. The wettest month is April, averaging 14mm of rainfall. February and March also tend to see above-average precipitation. The driest month is June, with just 0mm. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.
Wind
As Sulayyil is relatively calm, with an average annual wind speed of 4km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is March, averaging 4km/h, though still comfortable for most outdoor activities. The calmest conditions occur in October, with average winds dropping to 3km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 1km/h gap between the calmest and windiest months.
Seasons
90 days until Autumn
It is currently summer in As Sulayyil, which began on June 21, 2026. As Sulayyil is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in July at around 44°C, while the coldest stretch bottoms out in January near 11°C. Autumn is next, beginning on September 23, 2026 — 90 days from now.
Spring
Temperatures range from 19 to 40°C. Precipitation is minimal, with only around 19mm for the entire season. Winds are generally light, averaging 4km/h. Light layers work well as temperatures warm through the season — a great time to be outdoors.
Summer
Temperatures range from 29 to 44°C. Precipitation is minimal, with only around 0mm for the entire season. Winds are generally light, averaging 4km/h. Stay hydrated, wear sun protection, and seek shade during the hottest hours of the day.
Autumn
Temperatures range from 17 to 41°C. Precipitation is minimal, with only around 3mm for the entire season. Winds are generally light, averaging 3km/h. Layered clothing works best as temperatures gradually cool — enjoy the crisp air and changing scenery.
Winter
Temperatures range from 11 to 27°C. Precipitation is minimal, with only around 6mm for the entire season. Winds are generally light, averaging 4km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Best Time to Visit
The best time to visit As Sulayyil is during January, February, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 2mm per month. By contrast, July can be uncomfortably hot with temperatures reaching 44°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.
Monthly Climate Data
The table below shows monthly climate averages for As Sulayyil based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.
