Abu Dhabi is a coastal desert city, which means it really only has two seasons, not four: a long hot stretch from May to September, and a mild, pleasant one from October to April. Understanding this simple split saves a lot of poor planning.
Winter: the golden season From November to March, Abu Dhabi is at its best. Daytime temperatures range from 22°C to 28°C, humidity is relatively low, and rainfall is almost nonexistent — the annual average is just 49mm. January, February, and March are the sweet spot, averaging around 25°C, with roughly 11 hours of sunshine a day and only about two rainy days a month. This is the ideal window for walking the Corniche, exploring the Grand Mosque on foot, and wandering Yas Island without being worn down by heat.
Summer: brutal heat, but a chance to save From June to September, daytime temperatures easily climb above 39°C, and coastal humidity makes it feel even heavier than the thermometer suggests. Nights don't offer much relief either, with lows staying near 29°C. Outdoor activities are nearly impossible during the day, but the city's massive air-conditioned malls, Louvre Abu Dhabi, and the indoor sections of Yas Island's parks keep you out of the sun. The real upside of a summer visit: hotel prices drop noticeably compared to peak winter season, making it a solid budget option for travelers who don't mind the heat.
Shoulder months April and October sit in between: April's heat climbs toward 33°C, while October gradually starts cooling down. Both are reasonable choices for travelers who can't make peak winter but want to avoid summer's extremes.
A note for travelers from Saudi Arabia Since Abu Dhabi's winter weather closely resembles Riyadh's or the Eastern Province's during the same months, November through March remains the smartest pick for anyone wanting outdoor time — the Corniche, Yas Island, evenings by the water. If you'd rather have a shorter, cheaper trip and don't mind spending most of it indoors, summer is a practical, if hot, alternative.
Bottom line If your priority is outdoor time, walking, and photography, book between December and March. If your priority is cost and booking flexibility, and you're fine spending the trip mostly indoors, summer — brutal as it is — isn't an unreasonable choice.
