May–June (late spring) or September (early autumn). Late spring (May–June) offers comfortable temperatures (avg highs 57–63°F), long daylight hours, fewer crowds than August, and no festival price surges. September retains mild weather after the August festival rush and remains green and accessible. Both shoulder periods allow visits to Edinburgh Castle, the Royal Mile, and Old/New Town without peak-season congestion
| Month | High (°F) | Low (°F) | Notes |
|---|---|---|---|
| Jan | 43 | 36 | crisp & changeable |
| Feb | 44 | 36 | crisp & changeable |
| Mar | 47 | 37 | cool & changeable |
| Apr | 51 | 40 | cool & changeable |
| May | 56 | 44 | cool & changeable |
| Jun | 61 | 50 | mild & changeable |
| Jul | 65 | 53 | mild & changeable |
| Aug | 63 | 53 | mild & changeable |
| Sep | 60 | 50 | mild & changeable |
| Oct | 54 | 46 | cool & changeable |
| Nov | 48 | 40 | cool & changeable |
| Dec | 44 | 36 | crisp & changeable |