The best time to visit Iran
The best time to visit Iran for warm, sunny weather is March to June, when its destinations average a Sunshine Score of 76/100 with daytime highs around 27°C / 81°F. February and July are quieter shoulder-season alternatives with still-reliable sun. Midsummer peaks in July at about 37°C / 99°F — hot for sightseeing, ideal for the coast. The sea is swimmable (21°C+) year-round, warmest in July at 34°C.
Iran by month, averaged across 19 destinations from long-term climate normals — the best stretch is highlighted.
| Month | Sunshine Score | Avg day high | Rain | Sea | For a trip |
|---|---|---|---|---|---|
| January | 39 | 13° / 55°F | 34 mm | 22° | Mixed |
| February | 50 | 14° / 57°F | 28 mm | 21° | Good |
| March | 73 | 19° / 66°F | 30 mm | 23° | Excellent |
| April | 87 | 24° / 75°F | 24 mm | 25° | Excellent |
| May | 81 | 30° / 86°F | 11 mm | 28° | Excellent |
| June | 63 | 35° / 95°F | 6 mm | 32° | Very good |
| July | 54 | 37° / 99°F | 5 mm | 34° | Good |
| August | 60 | 36° / 97°F | 7 mm | 34° | Very good |
| September | 76 | 32° / 90°F | 11 mm | 33° | Excellent |
| October | 87 | 27° / 81°F | 21 mm | 32° | Excellent |
| November | 68 | 19° / 66°F | 38 mm | 28° | Very good |
| December | 46 | 14° / 57°F | 34 mm | 24° | Good |
When to go — and when to think twice
Best overall: March to June — Iran's warmest, most reliable stretch (Sunshine Score 76/100, ~27°C / 81°F days). Shoulder season: February and July — quieter, still sunny. Hottest: July, ~37°C / 99°F. Rain stays light most of the year (~249 mm total).
Where to base yourself for sunshine: Shiraz (3,285 h/yr), Isfahan (3,280 h/yr), Bandar Abbas (3,242 h/yr). See every Iran destination with a full climate card, or where it's sunny worldwide, month by month.