Isfahan is warmest in July, averaging 39° by day and 21° at night. The wettest month is February with 42 mm, and the year brings about 168 mm in total.
Month by month
| Month | High | Low | Rain | Daylight | Good for |
|---|---|---|---|---|---|
| January | 11° | -2° | 22 mm | 10.1 h | Cool |
| February | 13° | -1° | 42 mm | 10.8 h | Mild |
| March | 18° | 2° | 28 mm | 11.8 h | Sightseeing |
| April | 24° | 7° | 18 mm | 12.8 h | Sightseeing |
| May | 30° | 13° | 9 mm | 13.7 h | Beach weather |
| June | 37° | 18° | 0 mm | 14.1 h | Very hot |
| July | 39° | 21° | 3 mm | 14.0 h | Very hot |
| August | 37° | 19° | 3 mm | 13.2 h | Very hot |
| September | 33° | 16° | 0 mm | 12.2 h | Beach weather |
| October | 26° | 10° | 3 mm | 11.2 h | Beach weather |
| November | 18° | 3° | 21 mm | 10.3 h | Sightseeing |
| December | 13° | -1° | 19 mm | 9.9 h | Mild |
High and low are average daily maximum and minimum, rain is typical monthly total, daylight is the hours between sunrise and sunset mid-month. Climate normals from NASA POWER — averages, not promises.
When to go
Beach weather: May, September and October — highs around 30°, nights no colder than 10°, and at most 9 mm of rain in a month.
Walking the city: March, April and November — highs of 18–24° and no more than 28 mm of rain a month.
Serious heat: In June, July and August the average high reaches 39°.