Last updated: January 18, 2025
South Khorasan Province, Iran, showcases a diverse climate characterized by its Koppen-Geiger classifications of BSk (Cold Semi-Arid) and BWk (Hot Desert). The region experiences a remarkable temperature range, with minimums plunging to -16°C (3°F) in January, an average that hovers around 17°C (63°F), and soaring to maximums of 45°C (114°F) in June. This dynamic climate contributes to the unique ecosystems and agricultural practices in the area, demonstrating a landscape that is both resilient and adaptive to extreme temperature fluctuations.
In South Khorasan Province, Iran, temperature patterns exhibit distinct seasonal variations, with the winter months of January and February characterized by frigid conditions, where January records minimums as low as -16°C (3°F) and averages near 4°C (40°F). As spring approaches, temperatures gradually rise, peaking in March with averages of 13°C (55°F) and maximums nearing 35°C (96°F). This warming trend continues into April, where the averages climb to 18°C (65°F), setting the stage for the hot summer months of May through August, during which temperatures consistently reach their zenith. Particularly notable is June, where maximum temperatures surge to 45°C (114°F), reflecting the region's semi-arid climate. As autumn arrives, a cooling trend re-emerges, with September and October experiencing a decline in temperatures, eventually dipping back into colder averages by November and December. This cyclical shift underscores South Khorasan's diverse climatic dynamics, leading to a stark contrast between its scorching summers and chilly winters.
Nehbandan experiences a minimum temperature of -6°C (21°F) in January and a maximum of 44°C (111°F) in June, showcasing a significant temperature range throughout the year monthly temperatures in Nehbandan. In comparison, Birjand records lower January temperatures, reaching a minimum of -15°C (6°F), and a maximum of 40°C (104°F) in June monthly temperatures in Birjand. Meanwhile, Qa'en has a January minimum of -13°C (8°F) and also peaks at 40°C (104°F) in June monthly temperatures in Qa'en.
Precipitation patterns in South Khorasan Province, Iran, demonstrate a marked seasonal variation, concentrated primarily in the winter and early spring months. January begins with 25 mm (1.0 in) of rainfall over approximately 3 days, which increases to 37 mm (1.5 in) in February and peaks at 42 mm (1.6 in) in March, showcasing the region's reliance on winter precipitation to sustain its ecosystems. April sees a slight decrease, with 34 mm (1.3 in), followed by May, which records 20 mm (0.8 in). As the region transitions into summer, precipitation dwindles dramatically.
During the summer months of June, July, August, and September, South Khorasan experiences negligible rainfall, with June recording only 1 mm (0.0 in) and no rain thereafter until October. The dry season significantly impacts local agriculture and water resources, as the region remains virtually rain-free for several consecutive months. However, autumn does bring a modest return of precipitation, with 5 mm (0.2 in) in October and 13 mm (0.5 in) in November, before tapering off again in December with 9 mm (0.3 in). This distinct seasonal distribution of rain underscores the challenges of managing water resources in a predominantly arid environment.
In South Khorasan Province, Iran, sunshine duration reveals a distinct seasonal progression, with a consistent increase in sunlight hours as the year transitions from winter to summer. Beginning with 237 hours in January, the amount of sunshine steadily rises, reaching 281 hours in February and 330 hours in March. As spring advances into April, the region enjoys 343 hours of sunlight, laying the groundwork for the longer days of summer. May marks a significant leap to 384 hours, followed by an impressive peak in sunshine duration during the summer months, culminating in 405 hours in July.
The trend of abundant sunlight persists into August, albeit with a slight decrease to 390 hours, as summer begins to wane. The autumn months, while still fairly bright, signal a gradual decline, with September yielding 350 hours, October 331 hours, and November dropping to 293 hours. By December, the province experiences 290 hours of sunshine, highlighting a significant reduction as winter approaches. Overall, the annual sunshine pattern in South Khorasan underscores the region's potential for solar energy utilization, given its long summer days contrasted with shorter winter hours.
In South Khorasan Province, Iran, the UV Index displays substantial variability throughout the year, closely mirroring the region's seasonal shifts in sunlight and temperature. Starting with a moderate UV index of 5 in January, the risk of harm from unprotected sun exposure is relatively low, allowing for a burn time of 30 minutes before damage occurs. As February approaches, the UV index climbs to 7, signifying a high exposure category with a reduced burn time of 25 minutes. However, the true intensity of solar radiation becomes evident in March, where the index spikes to 11, categorized as extreme and requiring vigilant sun protection with a burn time narrowed to just 10 minutes.
The extreme UV levels persist into the following months, peaking at 14 in May, which reflects the heightened risk of skin damage during this time. June and July maintain this intensity at 13, before a slight decrease in August (UV index of 12) and September (UV index of 11), although the exposure remains classified as extreme. As autumn arrives in October, the UV index drops to 9 (very high) before descending further to 6 in November and returning to 5 by December, indicating a seasonal decline in sun exposure risk. The pronounced shifts in UV index throughout the year highlight the importance of sun protection, particularly during the peak summer months when extreme levels pose significant health risks.
UV Risk Categories
In South Khorasan Province, Iran, daylight duration varies notably throughout the year, reflecting the region's seasonal transitions. January and February each provide about 10 hours of daylight, offering a consistent but limited amount of sunshine during the winter months. As March arrives, daylight increases to 11 hours, signaling the gradual approach of spring. The month of April marks a significant change as daylight expands to 13 hours, continuing this trend into May, where residents enjoy the same extended hours. The arrival of summer in June and July ushers in the longest daylight hours of the year, peaking at 14 hours, which enhances opportunities for outdoor activities and agricultural endeavors.
As summer gives way to autumn, daylight starts to decrease, with August still offering 13 hours before tapering off to 12 hours in September. This decline continues into October with 11 hours, paving the way for shorter days in the late fall. November experiences a further reduction to 10 hours, and December closes the year with only 9 hours of daylight. This cyclical pattern illustrates the profound influence of seasonal changes on daily life in South Khorasan, emphasizing the importance of daylight for both ecological and human activity throughout the year.
Asadiyeh, Iran, experiences a wide range of temperatures throughout the year, with January temperatures dropping as low as -16°C (3°F) and peaking at 38°C (101°F) in June. Precipitation levels fluctuate, highest in April at 46 mm (1.8 in), and almost non-existent during the summer months of July and August. The town enjoys abundant sunshine, especially from June to August, with over 400 hours of sunlight per month. Winter months bring cooler temperatures and more precipitation. For more details, visit Asadiyeh climate.
Birjand, Iran, experiences a diverse climate marked by cold winters and hot summers. January temperatures range from -15°C to 19°C, while July sees maximums reaching up to 39°C. The region has limited precipitation, with most falling during the winter months, peaking at 43 mm in March. Sunshine is abundant throughout the year, with the highest hours in July at 406. For more detailed information, visit Birjand climate.
Boshruyeh, Iran, experiences a diverse climate characterized by hot summers and mild winters. January temperatures range from a minimum of -5°C (23°F) to a maximum of 22°C (71°F), while July can see highs of up to 45°C (113°F). Precipitation is minimal in the summer months, with June through September recording no rainfall, whereas March tends to be the wettest month with 38 mm (1.5 in) of rain. Sunshine is abundant, peaking at 403 hours in July, making it a bright and dry period. For more detailed information, visit Boshruyeh climate.
Ferdows, Iran experiences a diverse climate with marked seasonal variations. Winters are cold, with January temperatures ranging from -9°C to 19°C and precipitation peaking in February at 48 mm. As spring transitions into summer, temperatures rise sharply, with May averages of 23°C and June reaching up to 42°C, while rainfall significantly diminishes to 0 mm. The summer months are characterized by high sunshine hours, peaking at 406 hours in July. For more detailed information, visit Ferdows climate.
Hajjiabad, Iran, experiences a diverse climate characterized by cold winters and hot summers. January temperatures range from a low of -12°C (11°F) to a high of 21°C (71°F), while July sees averages between 17°C (63°F) and 39°C (103°F). Precipitation is most substantial in the spring months, peaking at 53 mm (2.1 in) in March, and remains absent during the summer months of June to September. Sunshine is abundant, with July receiving the highest at 404 hours. For more information, visit Hajjiabad climate.
Nehbandan, Iran experiences a continental climate characterized by hot summers and cold winters. Temperatures range from a frigid -6°C (21°F) in January to a scorching 44°C (111°F) in June. Precipitation is low, particularly in the summer months, with June through September recording no rainfall at all. The region enjoys ample sunshine, peaking at 402 hours in July. For more detailed information, visit Nehbandan climate.
The climate in Qa'en, Iran, features a significant temperature range, with winter lows reaching -13°C (8°F) in January and summer highs soaring up to 40°C (104°F) in June and August. Precipitation is highest during the spring months, particularly March with 49 mm (1.9 in), and diminishes to nearly zero by mid-summer. Sunshine is abundant, peaking at 406 hours in July, promoting a dry and warm summer season. Monthly averages indicate a transition from cold winters to hot summers, making Qa'en's climate diverse and extreme. For more detailed information, visit Qa'en climate.
The climate in Sarayan, Iran, exhibits a wide range of temperatures throughout the year, with January averaging 5°C (40°F) and reaching highs of 41°C (106°F) in July. Precipitation is most significant in the winter and spring months, peaking at 52 mm (2.1 in) in March, while summer remains extremely dry. The region enjoys ample sunshine, particularly in the summer, with July seeing around 405 hours of sun. For more detailed climate information, visit Sarayan climate.
Sarbisheh, Iran experiences a diverse climate, characterized by cold winters and hot summers. January temperatures can drop as low as -16°C (4°F) while peaking at 20°C (68°F), with substantial sunshine averaging 240 hours. The summer months of June to August see very high temperatures, reaching up to 40°C (104°F) in June, alongside minimal precipitation. Rainfall is generally more frequent in the spring, particularly in April with 40 mm (1.6 in). For more details, visit Sarbisheh climate.
In conclusion, the climate dynamics of South Khorasan Province, Iran, reveal a fascinating interplay of temperature, precipitation, sunshine duration, UV index, and daylight hours throughout the year. The region experiences extreme seasonal variations, from the frigid winters characterized by short daylight and moderate UV exposure, to the scorching summers marked by prolonged sunshine and high UV indices. These climatic factors significantly influence local ecosystems, agricultural practices, and health considerations, underscoring the importance of adapting to these changes. Understanding and leveraging these seasonal patterns can enhance resource management and promote sustainable practices within this unique and diverse province.