Isfahan climate
Isfahan (Iran) has a cold semi-arid climate (Köppen BSk). The average temperature over the year is 16 °C62 °F, and about 164 mm6.5 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Isfahan climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin | Frost days |
|---|---|---|---|---|---|
| Jan | 1049 | −326 | 338 | 230.9 | 27 |
| Feb | 1355 | −229 | 542 | 200.8 | 20 |
| Mar | 1865 | 236 | 1050 | 281.1 | 9 |
| Apr | 2374 | 745 | 1560 | 251.0 | 0 |
| May | 3086 | 1356 | 2271 | 100.4 | 0 |
| Jun | 3697 | 1865 | 2781 | 20.1 | 0 |
| Jul | 38101 | 2170 | 3085 | 10.0 | 0 |
| Aug | 3798 | 2067 | 2882 | 10.0 | 0 |
| Sep | 3290 | 1660 | 2475 | 10.0 | 0 |
| Oct | 2678 | 1050 | 1864 | 40.1 | 0 |
| Nov | 1662 | 337 | 1049 | 241.0 | 7 |
| Dec | 1152 | −229 | 541 | 261.0 | 22 |
| Year | 38101 | −326 | 1662 | 1646.5 | 85 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total. Frost days are for the whole grid cell.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 59% | 39% | 3.4 | 10:13 |
| Feb | 56% | 38% | 4.4 | 10:59 |
| Mar | 49% | 40% | 5.6 | 11:53 |
| Apr | 46% | 48% | 6.3 | 12:57 |
| May | 32% | 37% | 7.4 | 13:49 |
| Jun | 18% | 19% | 8.4 | 14:17 |
| Jul | 17% | 26% | 7.9 | 14:06 |
| Aug | 17% | 22% | 7.6 | 13:21 |
| Sep | 19% | 20% | 6.5 | 12:19 |
| Oct | 29% | 29% | 5.0 | 11:18 |
| Nov | 48% | 38% | 3.7 | 10:26 |
| Dec | 58% | 37% | 3.1 | 10:01 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Isfahan is like
The warmest month is July, with an average high of 38 °C101 °F and a low of 21 °C70 °F. The coldest is January, when highs average 10 °C49 °F and lows −3 °C26 °F. Seasons are strongly marked: the warmest month is on average 26.3 °C47.4 °F warmer than the coldest.
It is dry, with about 164 mm6.5 in of precipitation per year. The wettest three-month stretch is February–April, which brings 45% of the annual total. Months with less than 20 mm0.8 in on average: May–October. The wettest month is March (28 mm1.1 in), the driest is August (1 mm0.0 in).
Relative humidity ranges from 17% in August to 59% in January. The clearest skies (lowest average cloud amount, 19%) are typical of June. Average wind speed near the ground ranges from 6 km/h (4 mph) in November to 9 km/h (6 mph) in July. Daylight lasts from about 10.0 hours in December to 14.3 hours in June.
Best time to visit Isfahan
Based on these averages, the most comfortable months for sightseeing and outdoor activities are April and October: average highs of 23 °C74 °F to 26 °C78 °F with 4 mm0.1 in to 25 mm1.0 in of precipitation per month.
The most challenging month is January, which is cold, with average highs of 10 °C49 °F.
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
Isfahan weather by month
- January10 °C49 °F / −3 °C26 °F
- February13 °C55 °F / −2 °C29 °F
- March18 °C65 °F / 2 °C36 °F
- April23 °C74 °F / 7 °C45 °F
- May30 °C86 °F / 13 °C56 °F
- June36 °C97 °F / 18 °C65 °F
- July38 °C101 °F / 21 °C70 °F
- August37 °C98 °F / 20 °C67 °F
- September32 °C90 °F / 16 °C60 °F
- October26 °C78 °F / 10 °C50 °F
- November16 °C62 °F / 3 °C37 °F
- December11 °C52 °F / −2 °C29 °F
What to pack for Isfahan
- Winter (December–February) — highs 1049 to 13 °C55 °F, lows −326 to −2 °C29 °F, about 23 mm0.9 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket, an extra layer for the cooler mornings and evenings and shoes with good grip, as frost is common.
- Spring (March–May) — highs 1865 to 30 °C86 °F, lows 236 to 13 °C56 °F, about 21 mm0.8 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket and an extra layer for the cooler mornings and evenings.
- Summer (June–August) — highs 3697 to 38 °C101 °F, lows 1865 to 21 °C70 °F, about 1 mm0.0 in of precipitation a month. Pack very light, breathable clothing, a sun hat and plenty of water.
- Autumn (September–November) — highs 1662 to 32 °C90 °F, lows 337 to 16 °C60 °F, about 10 mm0.4 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an extra layer for the cooler mornings and evenings.
How Isfahan compares
Compared with Tehran, about 339 km to the north, Isfahan is on average 0.5 °C0.9 °F cooler and receives 47% less precipitation (164 mm6.5 in vs 311 mm12 in). The difference is largest in August (1.2 °C2.1 °F cooler).
Of the 82 places in Iran covered by World Climates, Isfahan is the 42nd warmest by annual mean temperature and the 67th wettest by annual precipitation. See all of them on the Iran climate page.
Places in other countries with the most similar temperature and rainfall pattern: Qarshi (Uzbekistan, BSk), Shahrisabz (Uzbekistan, BSk) and Navoiy (Uzbekistan, BSk).
The same NASA POWER grid cell also contains Baharestan (pop. 106,433). Their long-term averages in this dataset are essentially the same as for Isfahan, so they do not have separate pages.
Nearby places
- Khomeyni Shahr 13 km · 16 °C61 °F · 212 mm8.3 in
- Shahin Shahr 26 km · 16 °C61 °F · 184 mm7.2 in
- Shahreza 74 km · 15 °C59 °F · 218 mm8.6 in
- Shahr-e Kord 85 km · 13 °C55 °F · 284 mm11 in
- Kashan 150 km · 20 °C67 °F · 156 mm6.2 in
- Kashan 152 km · 20 °C67 °F · 156 mm6.2 in
- Izeh 193 km · 22 °C71 °F · 284 mm11 in
- Qom 233 km · 19 °C66 °F · 207 mm8.1 in
Frequently asked questions
What is the warmest month in Isfahan?
July is the warmest month in Isfahan, with an average high of 38 °C (101 °F) and an average low of 21 °C (70 °F).
What is the coldest month in Isfahan?
January is the coldest month, with an average high of 10 °C (49 °F) and an average low of -3 °C (26 °F).
When does it rain the most in Isfahan?
March is the wettest month with about 28 mm (1.1 in) of precipitation; August is the driest with about 1 mm (0.0 in).
What is the best time to visit Isfahan?
Judging by long-term averages, the most comfortable months are April and October.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 1,696 m, while Isfahan lies at about 1,578 m. Temperatures on this page were therefore adjusted by +0.8 °C1.4 °F using the standard lapse rate of 6.5 °C per 1,000 m.