Riyan Weather in September
With daytime temperatures of 33°C (91°F) and nighttime lows of 28°C (82°F), September in Riyan brings very high temperatures during the day. The perfect weather makes it an appealing time to visit.
Rainfall in Riyan in September
You can typically expect a single day of rain this month, averaging around 5.6 mm (0.2 in). If rain does fall, it tends to be a moderate shower rather than anything heavy.
Temperature in Riyan in September
The perfect temperature in Riyan in September makes it a solid month to visit, with 33°C (91°F) during the day and 28°C (82°F) at night. It's usually most comfortable outside during the morning and later in the day. With overnight lows of 28°C (82°F), nights stay very warm. Air conditioning makes a real difference if you're sensitive to heat. A cold shower before bed can also help you get to sleep more comfortably.
Average water temperature in September
The water temperature is 28°C (82°F), which most people find very comfortable. A good month for swimming and water sports.If you prefer dry days with pleasant temperatures, January, February, March and December typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Yemen, check out our Riyan's climate page.
Riyan Temperature in September
Min Temperature
28°C (82°F)
Max Temperature
33°C (91°F)
Water Temperature
28°C (82°F)
Chance of Rain
3%
Precipitation
5.6 mm (0.2 in)
Rainy days
a single day
Humidity
81%
Daily Historical Temperatures
30-year average (1989-2025)
Based on our historical records, temperatures in Riyan typically stay consistent throughout September, with daily highs averaging around 33°C (91°F). Nights are warm, with lows typically ranging from 26°C (79°F) to 28°C (82°F).
Average temperatures in September
Historical weather for Riyan in September
Browse day-by-day weather records for Riyan spanning 44 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Riyan historical weather extremes in September
Based on 19 years of weather observations in Riyan between 2006 and 2025, these are the recorded extremes.
- On September 6, 2012, temperatures climbed to 36°C (97°F), marking the warmest September day on record.
- The lowest daytime temperature in September was 26°C (79°F), recorded on September 22, 2018.
- The coldest night in September in Riyan was on September 30, 2012, with a minimum of 18°C (64°F).
- The wettest September day on record brought 3.1 mm (0.1 in) of precipitation to Riyan (September 7, 2023).
Best Places in Yemen in September
Find out more about the weather in Yemen and which places have the best travel conditions in this month. See all of Yemen in September →
perfect weather
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tolerable
unpleasant
poor
What to Wear in Riyan in September
Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Almost no rain is expected, so no need to bring rain gear. The water temperature sits at about 28°C (82°F), making it perfect for swimming and water activities. Don't forget to pack your favorite swimwear and perhaps some snorkel gear.What To Do in Riyan in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Yemen, check out our Riyan's climate page.
Temperature Rainfall Humidity Water Temp
See the full Riyan climate overview or explore weather in Yemen.
