Mecca is 3.3°C (5.9°F) warmer by day, and both get similar annual rainfall.
Ad Dammām is at its warmest in July and coolest in January, while Mecca peaks in June and bottoms out in January. Month for month, Mecca is the warmer of the two in 10 of 12 months.
Both collect a similar amount of rain over the year — 61 mm (2.4 in) in Ad Dammām and 50 mm (2 in) in Mecca. The most comfortable time to visit is February, March and December in Ad Dammām and January, February and December in Mecca.
| Ad Dammām | Metric | Mecca |
|---|---|---|
| 🌡️ Temperature | ||
| 37°C | 🌡️Average daytime high | 40.3°C |
| 19.2°C | 🌙Average nighttime low | 18.7°C |
| July | 🔥Hottest month | June |
| January | ❄️Coldest month | January |
| 🌧️ Rain | ||
| 61 mm | 🌧️Annual rainfall | 50 mm |
| January | ☔Wettest month | November |
| June | 🏜️Driest month | July |
| 💨 Climate | ||
| 51% | 💧Average humidity | 34% |
| 3.5 m/s | 💨Average wind speed | 3 m/s |
Overnight, Ad Dammām typically falls to around 19.2°C (66.6°F) while Mecca settles near 18.7°C (65.7°F).
Ad Dammām is hottest in July and coldest in January, whereas Mecca peaks in June and is coolest in January.
Ad Dammām sees the most rain in January and the least in June; Mecca is wettest in November and driest in July.
Ad Dammām feels the more humid of the two, averaging 51% relative humidity against 34%.
For Mecca, the pick of the year is January, February and December.
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 | Ad Dammām | Mecca | ||||
|---|---|---|---|---|---|---|
| Min | Avg | Max | Min | Avg | Max | |
| January | 9.5 | 17.6❄️ | 25.8 | 10.6 | 21.4❄️ | 32.2 |
| February | 10.1 | 19.2 | 28.4 | 10.8 | 22.6 | 34.4 |
| March | 12.5 | 22.7 | 32.9 | 12.9 | 25 | 37.2 |
| April | 16.7 | 27.6 | 38.4 | 16.9 | 28.7 | 40.6 |
| May | 22.3 | 32.4 | 42.6 | 21.5 | 33.1 | 44.6 |
| June | 26 | 35 | 44 | 24.4 | 35.4 | 46.4 |
| July | 28.3 | 36.4 | 44.5 | 25 | 35.6🔥 | 46.2 |
| August | 28.7 | 36.5🔥 | 44.2 | 25 | 35.4 | 45.7 |
| September | 25.6 | 34.1 | 42.6 | 25.3 | 35.2 | 45.1 |
| October | 22.4 | 30.8 | 39.2 | 21.3 | 31.4 | 41.5 |
| November | 16.2 | 24.7 | 33.3 | 17.2 | 26.8 | 36.3 |
| December | 11.5 | 19.6 | 27.7 | 12.9 | 23.1 | 33.2 |
| Annual Avg | 19.2 | 28.1 | 37 | 18.7 | 29.5 | 40.3 |
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 Ad Dammām and Mecca feel alike; where they separate, they are genuinely different places to be.
Hover or tap any point to read the exact figures. Ad Dammām Mecca
See how Ad Dammām and Mecca 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 Ad Dammām and Mecca — each drawn straight from the climate figures above.
Mecca is the warmer of the two. It averages daytime highs of 40.3°C (104.5°F) against 37°C (98.6°F) in Ad Dammām — roughly 3.3°C (5.9°F) warmer by day. Nights are milder in Ad Dammām, with average lows of 19.2°C (66.6°F) versus 18.7°C (65.7°F).
Ad Dammām is hottest in July, averaging highs of about 44.5°C (112.2°F), while Mecca peaks in June at around 46.4°C (115.6°F). That makes Mecca the hotter of the two at the height of summer.
Ad Dammām gets colder. In its coldest month (January) overnight lows average about 9.5°C (49.1°F), compared with 10.6°C (51.1°F) at the low point of the year in Mecca.
They get a similar amount of rain over a year — about 61 mm (2.4 in) in Ad Dammām and 50 mm (2 in) in Mecca. Ad Dammām is wettest in January and driest in June; Mecca is wettest in November and driest in July.
Ad Dammām is the more humid of the two, averaging 51% relative humidity over the year against 34% in Mecca.
The most comfortable months in Ad Dammām are February, March and December, when average temperatures are at their mildest.
Mecca is at its most pleasant around January, February and December, based on the mildest average temperatures of the year.
Mecca is the warmer city in 10 of the 12 months of the year. The gap is widest in January, about 3.8°C (6.8°F), and narrowest in June, about 0.4°C (0.7°F).
Ad Dammām has the bigger seasonal swing, about 18.9°C (34°F) between its coldest and hottest months versus 14.2°C (25.6°F) in Mecca — so Mecca has the steadier, more even climate.
On climate alone, Mecca comes out ahead — it offers warmer days and lower humidity than Ad Dammām. Ad Dammām is the better fit only if you'd actually prefer cooler weather and a more humid climate.
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 Ad Dammām and Mecca, not a single year's weather or a short-range forecast.
