Khorramabad climate
Khorramabad (Iran) has a hot semi-arid climate (Köppen BSh). The average temperature over the year is 18 °C65 °F, and about 357 mm14 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Khorramabad climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 1049 | 031 | 540 | 491.9 |
| Feb | 1254 | 134 | 644 | 381.5 |
| Mar | 1763 | 540 | 1152 | 532.1 |
| Apr | 2272 | 949 | 1661 | 622.4 |
| May | 3086 | 1558 | 2272 | 190.8 |
| Jun | 38101 | 2068 | 2984 | 40.1 |
| Jul | 41106 | 2475 | 3290 | 10.0 |
| Aug | 40105 | 2374 | 3289 | 00.0 |
| Sep | 3596 | 1966 | 2781 | 20.1 |
| Oct | 2882 | 1456 | 2169 | 251.0 |
| Nov | 1763 | 642 | 1153 | 471.9 |
| Dec | 1254 | 134 | 744 | 572.3 |
| Year | 41106 | 031 | 1865 | 35714 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 67% | 71% | 2.8 | 10:10 |
| Feb | 64% | 69% | 3.7 | 10:56 |
| Mar | 56% | 64% | 4.9 | 11:53 |
| Apr | 53% | 64% | 5.7 | 12:59 |
| May | 40% | 53% | 7.1 | 13:53 |
| Jun | 19% | 36% | 8.4 | 14:22 |
| Jul | 14% | 38% | 7.9 | 14:10 |
| Aug | 14% | 38% | 7.3 | 13:23 |
| Sep | 17% | 38% | 6.4 | 12:20 |
| Oct | 31% | 51% | 4.7 | 11:17 |
| Nov | 54% | 61% | 3.3 | 10:22 |
| Dec | 63% | 65% | 2.6 | 9:56 |
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 Khorramabad is like
The warmest month is July, with an average high of 41 °C106 °F and a low of 24 °C75 °F. The coldest is January, when highs average 10 °C49 °F and lows 0 °C31 °F. Seasons are strongly marked: the warmest month is on average 27.8 °C50.1 °F warmer than the coldest.
It is dry, with about 357 mm14 in of precipitation per year. The wettest three-month stretch is November–January, which brings 43% of the annual total. Months with less than 20 mm0.8 in on average: May–September. The wettest month is April (62 mm2.4 in), the driest is August (0 mm0.0 in).
Relative humidity ranges from 14% in August to 67% in January. The clearest skies (lowest average cloud amount, 36%) are typical of June. Average wind speed near the ground ranges from 6 km/h (4 mph) in November to 8 km/h (5 mph) in July. Daylight lasts from about 9.9 hours in December to 14.4 hours in June.
Best time to visit Khorramabad
Based on these averages, the most comfortable months for sightseeing and outdoor activities are April and May and October: average highs of 22 °C72 °F to 30 °C86 °F with 19 mm0.8 in to 62 mm2.4 in of precipitation per month.
The most challenging month is July, which is hot, with average highs of 41 °C106 °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 Khorramabad
- Winter (December–February) — highs 1049 to 12 °C54 °F, lows 031 to 1 °C34 °F, about 48 mm1.9 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 1763 to 30 °C86 °F, lows 540 to 15 °C58 °F, about 45 mm1.8 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 38101 to 41 °C106 °F, lows 2068 to 24 °C75 °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 1763 to 35 °C96 °F, lows 642 to 19 °C66 °F, about 25 mm1.0 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 Khorramabad compares
Compared with Arak, about 141 km to the northeast, Khorramabad is on average 4.2 °C7.6 °F warmer and receives 63% more precipitation (357 mm14 in vs 219 mm8.6 in). The difference is largest in August (5.2 °C9.3 °F warmer).
Of the 82 places in Iran covered by World Climates, Khorramabad is the 30th warmest by annual mean temperature and the 14th 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: Sulaymaniyah (Iraq, BSh), Kızıltepe (Turkey, BSh) and Viranşehir (Turkey, BSh).
Nearby places
- Borujerd 58 km · 15 °C59 °F · 324 mm13 in
- Dorud 65 km · 16 °C62 °F · 350 mm14 in
- Malayer 100 km · 13 °C56 °F · 303 mm12 in
- Dezful 123 km · 26 °C79 °F · 294 mm12 in
- Arak 141 km · 14 °C57 °F · 219 mm8.6 in
- Hamadan 147 km · 12 °C54 °F · 284 mm11 in
- Kermanshah 150 km · 15 °C59 °F · 346 mm14 in
- Shushtar 166 km · 27 °C80 °F · 248 mm9.8 in
Frequently asked questions
What is the warmest month in Khorramabad?
July is the warmest month in Khorramabad, with an average high of 41 °C (106 °F) and an average low of 24 °C (75 °F).
What is the coldest month in Khorramabad?
January is the coldest month, with an average high of 10 °C (49 °F) and an average low of 0 °C (31 °F).
When does it rain the most in Khorramabad?
April is the wettest month with about 62 mm (2.4 in) of precipitation; August is the driest with about 0 mm (0.0 in).
What is the best time to visit Khorramabad?
Judging by long-term averages, the most comfortable months are April and May 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 1,494 m, while Khorramabad lies at about 1,182 m. Temperatures on this page were therefore adjusted by +2 °C3.7 °F using the standard lapse rate of 6.5 °C per 1,000 m.