Sirjan climate
Sirjan (Iran) has a hot desert climate (Köppen BWh). The average temperature over the year is 18 °C65 °F, and about 152 mm6.0 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Sirjan climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin | Frost days |
|---|---|---|---|---|---|
| Jan | 1355 | −130 | 642 | 311.2 | 18 |
| Feb | 1559 | 133 | 846 | 261.0 | 11 |
| Mar | 2068 | 440 | 1254 | 230.9 | 4 |
| Apr | 2678 | 1050 | 1864 | 160.6 | 0 |
| May | 3290 | 1560 | 2475 | 40.2 | 0 |
| Jun | 3799 | 2068 | 2883 | 10.0 | 0 |
| Jul | 38101 | 2271 | 3086 | 10.0 | 0 |
| Aug | 3798 | 2068 | 2883 | 30.1 | 0 |
| Sep | 3392 | 1762 | 2577 | 00.0 | 0 |
| Oct | 2781 | 1253 | 1967 | 30.1 | 0 |
| Nov | 1966 | 541 | 1254 | 210.8 | 1 |
| Dec | 1458 | 133 | 846 | 240.9 | 10 |
| Year | 38101 | −130 | 1865 | 1526.0 | 45 |
“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 | 53% | 40% | 3.9 | 10:27 |
| Feb | 51% | 43% | 4.6 | 11:07 |
| Mar | 43% | 40% | 5.8 | 11:55 |
| Apr | 37% | 44% | 6.6 | 12:51 |
| May | 24% | 33% | 7.6 | 13:37 |
| Jun | 16% | 24% | 8.1 | 14:01 |
| Jul | 19% | 30% | 7.7 | 13:51 |
| Aug | 19% | 24% | 7.5 | 13:12 |
| Sep | 19% | 21% | 6.7 | 12:18 |
| Oct | 25% | 25% | 5.5 | 11:24 |
| Nov | 41% | 37% | 4.2 | 10:38 |
| Dec | 49% | 38% | 3.7 | 10:16 |
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 Sirjan is like
The warmest month is July, with an average high of 38 °C101 °F and a low of 22 °C71 °F. The coldest is January, when highs average 13 °C55 °F and lows −1 °C30 °F. Seasons are strongly marked: the warmest month is on average 24.2 °C43.6 °F warmer than the coldest.
It is dry, with about 152 mm6.0 in of precipitation per year. The wettest three-month stretch is December–February, which brings 53% of the annual total. Months with less than 20 mm0.8 in on average: April–October. The wettest month is January (31 mm1.2 in), the driest is September (0 mm0.0 in).
Relative humidity ranges from 16% in June to 53% in January. The clearest skies (lowest average cloud amount, 21%) are typical of September. Average wind speed near the ground ranges from 9 km/h (5 mph) in November to 13 km/h (8 mph) in August. Daylight lasts from about 10.3 hours in December to 14.0 hours in June.
Best time to visit Sirjan
Based on these averages, the most comfortable months for sightseeing and outdoor activities are March and April and October and November: average highs of 19 °C66 °F to 27 °C81 °F with 3 mm0.1 in to 23 mm0.9 in of precipitation per month.
The most challenging month is July, which is hot, with average highs of 38 °C101 °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.
What to pack for Sirjan
- Winter (December–February) — highs 1355 to 15 °C59 °F, lows −130 to 1 °C33 °F, about 27 mm1.1 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket and an extra layer for the cooler mornings and evenings.
- Spring (March–May) — highs 2068 to 32 °C90 °F, lows 440 to 15 °C60 °F, about 14 mm0.6 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.
- Summer (June–August) — highs 3798 to 38 °C101 °F, lows 2068 to 22 °C71 °F, about 2 mm0.1 in of precipitation a month. Pack very light, breathable clothing, a sun hat and plenty of water.
- Autumn (September–November) — highs 1966 to 33 °C92 °F, lows 541 to 17 °C62 °F, about 8 mm0.3 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 Sirjan compares
Compared with Kerman, about 163 km to the northeast, Sirjan is on average 0.9 °C1.7 °F warmer and receives 29% more precipitation (152 mm6.0 in vs 117 mm4.6 in). The difference is largest in August (2 °C3.5 °F warmer).
Of the 82 places in Iran covered by World Climates, Sirjan is the 33rd warmest by annual mean temperature and the 72nd 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: Amman (Jordan, BSk), Zarqa (Jordan, BSh) and Mazar-e Sharif (Afghanistan, BWh).
Nearby places
- Rafsanjan 110 km · 19 °C66 °F · 126 mm5.0 in
- Kerman 163 km · 17 °C63 °F · 117 mm4.6 in
- Jiroft 218 km · 27 °C80 °F · 91 mm3.6 in
- Jahrom 232 km · 23 °C73 °F · 199 mm7.8 in
- Bandar Abbas 259 km · 28 °C83 °F · 114 mm4.5 in
- Marvdasht 282 km · 18 °C64 °F · 307 mm12 in
- Yazd 300 km · 20 °C68 °F · 56 mm2.2 in
- Shiraz 305 km · 18 °C65 °F · 273 mm11 in
Frequently asked questions
What is the warmest month in Sirjan?
July is the warmest month in Sirjan, with an average high of 38 °C (101 °F) and an average low of 22 °C (71 °F).
What is the coldest month in Sirjan?
January is the coldest month, with an average high of 13 °C (55 °F) and an average low of -1 °C (30 °F).
When does it rain the most in Sirjan?
January is the wettest month with about 31 mm (1.2 in) of precipitation; September is the driest with about 0 mm (0.0 in).
What is the best time to visit Sirjan?
Judging by long-term averages, the most comfortable months are March and April and October and November.
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 1,825 m, while Sirjan lies at about 1,744 m. Temperatures on this page were therefore adjusted by +0.5 °C1 °F using the standard lapse rate of 6.5 °C per 1,000 m.