May and June
Go nowLong light, everything open, and the crowd has not arrived
The best combination of the year: light until ten at night, the driest stretch of the calendar, gardens out, and none of the August pressure on beds or restaurants. Arthur's Seat and the coast are at their best now. It can still be cold and windy — this is Scotland — but the days are long enough to absorb a bad afternoon.
September
Go nowThe festival is over and the city is itself again
The single most underrated month here. The Fringe has packed up, prices fall back, and the same city is walkable again, with warm-ish days, low golden light on the stone and the students not yet fully back. Days are shortening but still generous. If you want Edinburgh rather than the festival, come now.
August
Worth it, butThe Fringe: the most to see, and the worst value of the year
Thousands of shows, the International Festival, the Tattoo and the Book Festival at once, and an atmosphere that genuinely exists nowhere else. It is also double the population, quadruple the room rates and a Royal Mile you cannot walk down. Come for the festival or avoid the month; there is no middle position. Book beds in spring.
July
Worth it, butWarm, long days, and the calm before August
The warmest month, with light until late and the city still normal, but school holidays have started across Britain and prices are rising towards August. Wetter than May and June. A perfectly good time to come, and slightly worse value than either side of it.
December
Worth it, butChristmas market and Hogmanay, in seven hours of daylight
The market in Princes Street Gardens, lights on the Georgian streets and Hogmanay at the end, which is the second peak of the Edinburgh year. Sunset is around half past three and the street party is ticketed and sells out. Cold, dark and genuinely festive, and priced accordingly in the last week.
April and October
Worth it, butShoulder months, cheap and unreliable
Fewer people, lower prices and reasonable daylight, with weather that can give you a bright still day or four days of horizontal rain. October has the best light of the year when it behaves. Bring layers and have an indoor plan; the National Museum exists for exactly this.
January, February, March and November
Think twiceDark, cold and wind off the North Sea
Seven or eight hours of daylight, damp cold, and a wind that makes the Old Town genuinely unpleasant to walk in. The city is cheap and empty and the museums and pubs are excellent, but any plan involving being outdoors is a gamble. Only worth it if the price is the point.