Jeddah is 1.3°C (2.3°F) warmer by day, Jeddah has 7.1°C (12.8°F) warmer nights, and both get similar annual rainfall.
Jeddah is at its warmest in June and coolest in January, while Riyadh peaks in July and bottoms out in January. Month for month, Jeddah is the warmer of the two in 10 of 11 months.
Both collect a similar amount of rain over the year — 48 mm (1.9 in) in Jeddah and 48 mm (1.9 in) in Riyadh. The most comfortable time to visit is January, February and December in Jeddah and February, March and November in Riyadh.
| Jeddah | Metric | Riyadh |
|---|---|---|
| 🌡️ Temperature | ||
| 39.5°C | 🌡️Average daytime high | 38.2°C |
| 21.2°C | 🌙Average nighttime low | 14.1°C |
| June | 🔥Hottest month | July |
| January | ❄️Coldest month | January |
| 🌧️ Rain | ||
| 48 mm | 🌧️Annual rainfall | 48 mm |
| November | ☔Wettest month | March |
| June | 🏜️Driest month | June |
| 💨 Climate | ||
| 46% | 💧Average humidity | 25% |
| 3.3 m/s | 💨Average wind speed | 2.8 m/s |
Overnight, Jeddah typically falls to around 21.2°C (70.2°F) while Riyadh settles near 14.1°C (57.4°F).
Jeddah is hottest in June and coldest in January, whereas Riyadh peaks in July and is coolest in January.
Jeddah sees the most rain in November and the least in June; Riyadh is wettest in March and driest in June.
Jeddah feels the more humid of the two, averaging 46% relative humidity against 25%.
For Riyadh, the pick of the year is February, March and November.
Month by month, here is the coldest night, the average day and the hottest afternoon each city can expect. Switch Compare to read rainfall, humidity, wind or solar instead, and Period to move between the long-term 45-year average and any single year — the shading is a quick warm-to-cool guide.
| Month | Jeddah | Riyadh | ||||
|---|---|---|---|---|---|---|
| Min | Avg | Max | Min | Avg | Max | |
| January | 14.6 | 23.4❄️ | 32.1 | 1.7 | 14.9❄️ | 28.1 |
| February | 14.6 | 24.3 | 33.9 | 3.5 | 17.6 | 31.6 |
| March | 16.3 | 26.4 | 36.5 | 7.2 | 21.3 | 35.4 |
| April | 19.1 | 29.4 | 39.7 | 12.9 | 26.1 | 39.4 |
| May | 22.9 | 33.2 | 43.6 | 19.3 | 31.5 | 43.6 |
| June | 24.9 | 35 | 45 | 23.2 | 34.2 | 45.1 |
| July | 26.5 | 35.2 | 44 | 25.1 | 35.5🔥 | 45.8 |
| August | 27 | 35.3 | 43.5 | 25 | 35.3 | 45.6 |
| September | 26.6 | 35.4🔥 | 44.2 | 21.2 | 32.2 | 43.3 |
| October | 24.4 | 33 | 41.6 | 16.4 | 27.6 | 38.8 |
| November | 20.6 | 28.5 | 36.4 | 9.6 | 21.2 | 32.9 |
| December | 16.8 | 25.1 | 33.4 | 3.8 | 16.1 | 28.4 |
| Annual Avg | 21.2 | 30.4 | 39.5 | 14.1 | 26.1 | 38.2 |
Min / mean / max temperature (°C). 🔥 marks each city's hottest month, ❄️ its coldest; shading runs cool blue to warm red.
The same figures plotted out, so the shape of a typical year is easier to see than in a grid. Where the two lines run close together Jeddah and Riyadh feel alike; where they separate, they are genuinely different places to be.
Hover or tap any point to read the exact figures. Jeddah Riyadh
See how Jeddah and Riyadh stack up against other cities. Swipe for more.
Choose which city to keep, then search for any other city in our database — we'll build the comparison for you.
Quick answers to the questions people ask most when comparing Jeddah and Riyadh — each drawn straight from the climate figures above.
Jeddah is the warmer of the two. It averages daytime highs of 39.5°C (103.1°F) against 38.2°C (100.8°F) in Riyadh — roughly 1.3°C (2.3°F) warmer by day. Nights are milder in Jeddah, with average lows of 21.2°C (70.2°F) versus 14.1°C (57.4°F).
Jeddah is hottest in June, averaging highs of about 45°C (113.1°F), while Riyadh peaks in July at around 45.8°C (114.5°F). That makes Riyadh the hotter of the two at the height of summer.
Riyadh gets colder. In its coldest month (January) overnight lows average about 1.7°C (35°F), compared with 14.6°C (58.2°F) at the low point of the year in Jeddah.
They get a similar amount of rain over a year — about 48 mm (1.9 in) in Jeddah and 48 mm (1.9 in) in Riyadh. Jeddah is wettest in November and driest in June; Riyadh is wettest in March and driest in June.
Jeddah is the more humid of the two, averaging 46% relative humidity over the year against 25% in Riyadh.
The most comfortable months in Jeddah are January, February and December, when average temperatures are at their mildest.
Riyadh is at its most pleasant around February, March and November, based on the mildest average temperatures of the year.
Jeddah is the warmer city in 10 of the 11 months of the year. The gap is widest in December, about 9°C (16.2°F), and narrowest in August, about 0°C (0°F).
Riyadh has the bigger seasonal swing, about 20.6°C (37.1°F) between its coldest and hottest months versus 12°C (21.6°F) in Jeddah — so Jeddah has the steadier, more even climate.
It depends what matters most to you: choose Jeddah for warmer weather and go for Riyadh if you want lower humidity. There is no single "better" climate — it comes down to whether you value warmth, dryness or comfort most.
Every figure on this page is calculated from NASA POWER satellite climate data spanning 1981–2025 (45 years). The averages describe the long-term climate of Jeddah and Riyadh, not a single year's weather or a short-range forecast.
