Last updated: January 18, 2025
The climate of Lorestan Province, Iran, is characterized by a diverse range of temperatures and classified under the Köppen-Geiger system as Csa and Dsa. The province experiences significant seasonal variations, with minimum temperatures plummeting to -24°C (-11°F) in January, reflecting the harsh winter conditions. In contrast, summer months can soar with average highs reaching 43°C (109°F) in July. Overall, the region maintains a moderate average temperature of 15°C (59°F), illustrating the unique climate dynamics that influence the local ecosystems and agricultural practices throughout the year.
Lorestan Province experiences distinct seasonal temperature patterns, showcasing a dramatic range from frigid winters to scorching summers. January and February mark the coldest months, with minimum temperatures reaching as low as -24°C (-11°F) and average highs barely touching 20°C (69°F). As spring approaches in March and April, temperatures rise more significantly, with averages climbing to 13°C (56°F) and occasional peaks near 32°C (89°F). By May, the warmth intensifies, peaking in the summer months of June through August, where average temperatures hover around 25°C to 28°C (77°F to 83°F) and maximums often exceed 40°C (104°F). As the year progresses into fall, temperatures begin to cool, with October and November witnessing a gradual decline and winter setting in again by December, completing the cycle with minimums dropping back down to -12°C (10°F). This cyclical variation in temperature not only shapes the region's climate but also significantly influences its ecosystems and agricultural practices.
Poldokhtar experiences a temperature range from a minimum of -6°C (21°F) in February to a maximum of 43°C (109°F) in July, while Borujerd has more extreme winter lows, reaching -23°C (-9°F) in January and a summer high of 37°C (99°F) in July. In Khorramabad, temperatures dip to -19°C (-2°F) in February and rise to a maximum of 41°C (106°F) in July. For more detailed temperature information, visit monthly temperatures in Poldokhtar, monthly temperatures in Borujerd, and monthly temperatures in Khorramabad.
Lorestan Province experiences a pronounced wet season primarily from January through April, characterized by significant precipitation levels. January begins with 75 mm (3.0 in) of rain, escalating to a peak of 106 mm (4.2 in) in March. This precipitation is typically accompanied by 8 to 11 rainy days per month, providing vital moisture during the region's winter and early spring, which supports the local agricultural cycle. By May, however, precipitation drops sharply to 33 mm (1.3 in) as the region transitions to drier conditions.
The summer months of June through August witness an almost complete cessation of rainfall, with June and July recording negligible precipitation of 2 mm (0.1 in) and 0 mm (0.0 in), respectively. This extended dry phase persists into early fall, with only trace amounts noted in September. Precipitation resumes in late fall, with October experiencing a slight uptick at 19 mm (0.8 in), followed by a return to more substantial rainfall in November and December, at 72 mm (2.8 in) and 79 mm (3.1 in), respectively. The cyclical pattern of precipitation not only impacts the local climate but also plays a crucial role in shaping the region's agricultural activities throughout the year.
In Lorestan Province, the duration of sunshine follows a clear seasonal trend, showcasing a steady increase from the depths of winter to the height of summer. Starting with 227 hours of sunlight in January, the province gradually experiences more daylight as the year progresses, with a notable jump to 341 hours by April. The sunshine continues to intensify, reaching its peak in June at 399 hours, making it the sunniest month of the year. This trend underscores the region’s transition from the cooler, darker winter months to the vibrant, sun-filled days of summer, creating an ideal environment for various outdoor activities and agricultural growth.
As summer wanes into fall, the sunshine hours begin to taper off, but remain substantial. July and August still provide impressive sunlight, with 395 hours and 380 hours respectively. However, by September, this figure drops to 349 hours, heralding the onset of shorter days. The decline continues through the autumn months, with October, November, and December registering significantly less sunlight—323, 276, and 273 hours, respectively. Despite this reduction, the overall pattern highlights the stark contrast between the sun-drenched summers and the more subdued light of the winter months, illustrating Lorestan Province's diverse climatic rhythm.
The UV Index in Lorestan Province reveals significant seasonal variations, with a pronounced escalation from winter to summer. Beginning in January with a UV Index of 6, categorized as high, residents are advised to limit sun exposure to 25 minutes to prevent skin damage. As we move into the spring months, the index climbs steadily, reaching a remarkable 10 in March—the first instance of a very high exposure risk—and peaking in April at an alarming 11, classified as extreme, where the burn time decreases to just 10 minutes. This upward trend highlights the approaching dangers as the sun's intensity increases, necessitating heightened awareness and sun protection practices as warmer months draw near.
During the peak summer months of May through August, the UV Index remains critically high, fluctuating between 12 and 14, indicating extreme risk levels where sunburn can occur in less than 10 minutes. This period necessitates extreme caution and effective sun protection strategies. As autumn sets in, the UV levels gradually decrease, with October still presenting a very high index of 8, but the burn time extends to 15 minutes. By November and December, the index drops to more moderate levels of 5, allowing for longer exposure times of up to 30 minutes without significant risk. This seasonal shift in UV Index not only underscores the importance of protective measures during the sunnier months but also serves as a reminder of Lorestan's intense solar environment.
UV Risk Categories
In Lorestan Province, daylight duration exhibits a clear seasonal pattern, starting at approximately 10 hours during the winter months of January and February. As spring approaches, the days gradually lengthen, with March witnessing an increase to 11 hours. The trend continues into April and May, where daylight reaches 13 hours, reflecting the gradual transition into the sunnier seasons. This increase in daylight is significant for local agriculture, as it provides more sunlight for crops and longer working hours for farmers.
The length of daylight peaks during the summer months of June and July, with 14 hours of light, allowing for ample time to engage in outdoor activities. As the year progresses into late summer and early autumn, daylight begins to decrease, dropping to 13 hours in August and further down to 12 hours by September. The shortening days continue through October, aligning with a decrease to 11 hours before reverting back to 10 hours in November. By December, daylight dips to its lowest, at 9 hours, marking the subtle but notable transition back into the winter months. This cyclical pattern of daylight duration plays a vital role in shaping not only the climate but also the cultural practices and lifestyle of the region's inhabitants.
The climate in Aleshtar, Iran, is characterized by cold winters and hot summers. January temperatures can drop as low as -21°C (-6°F), with maximums reaching up to 15°C (60°F), while July experiences much warmer conditions, with highs around 39°C (103°F). Precipitation is most abundant in winter, particularly in February and March when it can exceed 111 mm (4.4 in), but it diminishes significantly over the summer months. Sunshine hours peak between May and July, with nearly 400 hours of sunlight in June. For more detailed information, visit Aleshtar climate.
Aligudarz, Iran experiences a continental climate with cold winters and hot summers. January temperatures can drop as low as -24°C (-11°F) and reach a maximum of 16°C (62°F), while July sees highs around 37°C (100°F). Precipitation is highest during the winter months, peaking in March at 63 mm, and is minimal between June and August. The region enjoys ample sunshine throughout the year, with May and June receiving the most hours at approximately 387 and 401, respectively. For more detailed information, visit Aligudarz climate.
Azna, Iran experiences a continental climate with cold winters and warm summers. January temperatures range from -22°C (-7°F) to 16°C (61°F), while July sees averages between 14°C (57°F) and 36°C (98°F). Precipitation is highest during the early months, peaking in March at 93 mm (3.7 in), before dropping significantly in summer. The area enjoys abundant sunshine, especially during late spring and summer, with May averaging 387 hours. For more detailed information, visit Azna climate.
The climate in Borujerd, Iran is characterized by cold winters and warm summers. January temperatures can drop to a minimum of -23°C (-9°F), while July sees maximums reaching up to 37°C (99°F). Precipitation peaks in spring, particularly in April with 115 mm, while summer months experience significantly less rainfall. Sunshine is abundant, with the highest hours recorded in June at 402 hours. The diverse climate conditions make Borujerd a unique location for weather patterns throughout the year. For more details, visit Borujerd climate.
The climate in Dorud, Iran, features a cold, snowy winter with temperatures ranging from -21°C in February to a mild 16°C in October. Summers are warm, with peak temperatures reaching up to 38°C in July and August. Precipitation is heaviest in the winter months, particularly in February and March, totaling over 120 mm. Sunshine is abundant, with the sunniest months being May and June, averaging around 400 hours. For more detailed information, visit Dorud climate.
Khorramabad, Iran experiences a diverse climate with cold winters and hot summers. January and February see temperatures dropping to -19°C (2°F), while July peaks at a scorching 41°C (106°F). Precipitation is highest in the winter months, averaging over 100 mm, and nearly absent in the summer, particularly from June to September. Sunshine hours reach their maximum in May and June, providing ample daylight during the warmer season. For more details, visit Khorramabad climate.
Kuhdasht, Iran experiences a diverse climate with notable temperature fluctuations throughout the year. Winter months, particularly January and February, can see minimum temperatures drop to around -8°C (18°F), while summers are hot, with July and August peaks around 41°C (106°F). Annual precipitation is highest in early spring, peaking in March at 115 mm (4.5 in), followed by drier months in summer. Moreover, sunshine hours are plentiful, with July receiving around 397 hours of sun. For more detailed information, visit Kuhdasht climate.
Nurabad, Iran, experiences a diverse climate characterized by cold winters and hot summers. January sees minimum temperatures plummet to -23°C (-8°F), while July peaks at 39°C (102°F). Annual precipitation is concentrated from January to April, with March recording the highest at 118 mm (4.6 in), while summer months remain largely dry. Despite the harsher winter conditions, the region enjoys ample sunshine throughout the year, with the sunniest months being May and June. For more detailed insights, visit Nurabad climate.
Poldokhtar, Iran, experiences a continental climate with significant temperature variations throughout the year. Winters are chilly, with January averaging around 6°C (42°F) and significant precipitation peaking in February and March, recording over 100 mm. Summers are hot and dry, particularly in July and August, where temperatures can soar above 40°C (104°F) and rainfall is virtually absent. The region enjoys ample sunshine year-round, peaking in July with around 395 hours. For more detailed climate information, visit Poldokhtar climate.
Sarab-e Dureh, Iran experiences a diverse climate with cold winters and hot summers. January and February see minimum temperatures plunge to -10°C (14°F), while July and August soar to highs of 42°C (108°F). Precipitation is concentrated in the winter and spring months, particularly February with 115 mm (4.5 in) of rainfall, followed by dry summer months. Sunshine hours peak in June and July, averaging around 398 hours, contributing to the area's warm temperatures. For more detailed information, visit Sarab-e Dureh climate.
The climate in Vasian, Iran, features cold winters and hot summers, with January temperatures ranging from a minimum of -9°C (17°F) to a maximum of 18°C (64°F), and July temperatures peaking at 42°C (108°F). Precipitation is highest in the winter months, particularly February with 115 mm (4.5 in), and virtually absent from June to September. Sunshine hours increase throughout the spring and summer, with June and July offering the most at 398 hours each. For more details, visit Vasian climate.
In conclusion, Lorestan Province's climate is marked by its diverse temperature ranges, significant precipitation patterns, varying sunshine durations, and fluctuating UV Index levels throughout the year. The seasonal shifts—from the chilly winters with limited daylight and high UV factors to the scorching summers characterized by extreme sunshine and long daylight hours—underscore the region's dynamic climate. These climatic elements not only influence the local agricultural practices and ecological conditions but also shape the lifestyle and cultural rhythms of its inhabitants. Understanding these patterns is essential for effective planning, whether it be for farming, tourism, or health considerations, ensuring that both residents and visitors can adapt to and enjoy the unique environment that Lorestan has to offer.