Yasuj Climate & Monthly Temperature Overview – Iran

Summer Season in Yasuj, Iran
Yasuj is characterized by a temperate summer climate with average temperatures ranging from 18°C (64°F) to 34°C (93°F). The hottest months are July and August, where temperatures can soar up to 38°C (100°F). The humidity levels are moderate, making the heat bearable. Yasuj experiences occasional thunderstorms during the summer months, providing relief from the scorching temperatures. The rainfall is minimal, contributing to the arid landscape of the region.

Winter Season in Yasuj, Iran
In contrast to the summer, Yasuj winters are cold and dry, with average temperatures dropping below freezing. January is the coldest month, with temperatures averaging between -4°C (25°F) to 8°C (46°F). Snowfall is common during the winter season, especially in the higher elevations. The atmosphere remains clear and dry, with minimal precipitation. However, the cold temperatures and occasional snowfall can make outdoor activities challenging.

Monthly Temperature Variation

Yasuj, nestled in the mountainous Zagros region of Iran, experiences significant temperature variations throughout the year. The average temperature ranges from a frigid -2°C (28.4°F) in January to a sweltering 33°C (91.4°F) in July. The city’s high elevation and proximity to the Zagros Mountains contribute to the extremes in temperature.

Seasonal Characteristics

The seasons in Yasuj are well-defined, each with distinct characteristics. Winters are cold and snowy, with temperatures often dropping below freezing. Springs are pleasant and mild, with average temperatures hovering around 15°C (59°F). Summers are scorching hot, with temperatures regularly exceeding 30°C (86°F). Autumns are relatively temperate, with average temperatures ranging from 10°C (50°F) to 20°C (68°F).

Cloud Cover in Yasuj, Iran

Yasuj, the capital of Kohgiluyeh and Boyer-Ahmad Province in Iran, is situated in a mountainous region with a cool and humid climate. Due to its geographic location and elevation, Yasuj experiences frequent cloud cover throughout the year. The average annual cloudiness is around 60%, with a higher frequency of overcast skies during the winter and spring months. The cloud cover is influenced by the prevailing westerly winds that bring moisture from the Mediterranean Sea and the Persian Gulf.

The clouds in Yasuj play a significant role in regulating the temperature and precipitation in the region. During the summer months, the cloud cover provides shade and helps to keep temperatures from becoming excessively hot. In the winter, the clouds act as a blanket, trapping heat and preventing rapid cooling. The cloud cover also contributes to the relatively high precipitation in Yasuj, which averages around 1,000 millimeters per year. The clouds release moisture in the form of rain, snow, or hail, depending on the season. The presence of clouds ensures a reliable water supply for agriculture and other activities in the region.

Average Precipitation

Yasuj, Iran, experiences moderate precipitation throughout the year, with an average annual rainfall of around 350 millimeters. The precipitation is distributed relatively evenly across the months, with slightly higher rainfall in the spring and autumn. The wettest month is typically April, with an average rainfall of about 45 millimeters, while the driest month is usually July, with an average rainfall of about 10 millimeters.

Seasonal Precipitation

The precipitation in Yasuj is influenced by its location in the Zagros Mountains. The mountains act as a barrier to moisture-carrying winds from the Persian Gulf, resulting in lower precipitation on the eastern side of the mountains where Yasuj is situated. In the winter months, snowfall can be common in Yasuj, particularly at higher elevations. The snowpack can provide an important source of water for the region during the spring and summer months when precipitation is lower.

Distribution and Patterns

Yasuj, a city in southwestern Iran, experiences a significant variation in rainfall throughout the year. The city lies within the Zagros Mountains, which play a crucial role in the distribution and patterns of precipitation. During the winter months, moist air masses from the Mediterranean Sea encounter the mountains, leading to heavy rainfall on the windward slopes. However, the leeward slopes receive significantly less precipitation due to the rain shadow effect. Additionally, Yasuj receives sporadic rainfall during the spring and autumn seasons, primarily associated with passing low-pressure systems and thunderstorms.

Seasonal Precipitation

The average annual rainfall in Yasuj is approximately 800 millimeters (31 inches). The wettest months are January, February, and November, which collectively account for nearly half of the annual precipitation. During these months, rainfall can occur frequently, with occasional heavy downpours. The driest months are June, July, and August, when rainfall is almost non-existent. The lack of significant precipitation during the summer months can lead to water shortages and drought conditions. Nonetheless, Yasuj’s annual rainfall is crucial for agriculture, particularly for the cultivation of wheat, barley, and fruits.

Heavy Snowfall Cripples Yasuj, Iran

Yasuj, the capital of Kohgiluyeh and Boyer-Ahmad Province in southwestern Iran, has been hit by a severe snowstorm, bringing the city to a standstill. Heavy snowfall began on Thursday night and continued throughout Friday, with more than 1 meter (over 3 feet) accumulating in some areas. The intense snowfall has paralyzed transportation, with roads closed and flights canceled. Emergency services have been deployed to clear the snow and assist stranded motorists.

City Struggles to Cope with Heavy Snowfall

The heavy snowfall has caused widespread power outages, as snow-laden tree branches have fallen on power lines. Schools and government offices have been closed, and businesses have been severely disrupted. Residents have been advised to stay home and avoid unnecessary travel. The local government has deployed snowplows and other equipment to clear the streets, but progress has been slow due to the sheer volume of snowfall. The city is appealing for assistance from the national government, as the local resources are overwhelmed.

Sunrise and Sunset Times in Yasuj

The timing of sunrise and sunset in Yasuj varies throughout the year due to Earth’s orbit around the sun and the city’s latitude. During the summer months (June to August), the sun rises earlier and sets later, resulting in longer days. In December, the shortest day of the year, the sun rises around 07:20 AM and sets around 05:30 PM, providing approximately 10 hours of daylight. Conversely, in June, the longest day of the year, the sun rises around 05:30 AM and sets around 08:30 PM, offering around 15 hours of daylight.

Sun’s Position and Intensity

Yasuj is located in the Northern Hemisphere, so the sun is higher in the sky during the summer months and lower in the sky during the winter months. This difference in altitude affects the intensity of the sunlight, with higher altitudes leading to more intense solar radiation. In the summer, the sun shines directly overhead, resulting in high levels of ultraviolet (UV) radiation and heat. In contrast, during the winter, the sun is lower in the sky, providing less intense and shorter periods of sunlight.

Phases of the Moon in Yasuj, Iran

The moon goes through a cycle of phases as it orbits the Earth. In Yasuj, Iran, the moon’s phases are affected by its position relative to the Earth and the Sun. The most common phases of the moon visible from Yasuj are the new moon, crescent moon, first quarter moon, waxing gibbous moon, full moon, waning gibbous moon, third quarter moon, and waning crescent moon.

The new moon is the phase when the moon is not visible from Earth. This occurs when the moon is between the Earth and the Sun. The crescent moon is the first phase after the new moon, and it appears as a thin sliver of light. The first quarter moon is the phase when the moon is half lit. The waxing gibbous moon is the phase when the moon is more than half lit and is growing towards full. The full moon is the phase when the entire face of the moon is lit. The waning gibbous moon is the phase when the moon is more than half lit and is decreasing towards third quarter. The third quarter moon is the phase when the moon is half lit. The waning crescent moon is the phase when the moon is less than half lit and is shrinking towards new.

Cultural Significance of the Moon in Yasuj, Iran

The moon has a significant cultural significance in Yasuj, Iran. The lunar calendar is used to determine the dates of religious holidays and festivals. The moon is also used to guide agricultural practices, such as planting and harvesting. In addition, the moon is a popular subject in art and literature.

Seasonal Variations in Humidity

Yasuj experiences significant fluctuations in humidity levels throughout the year. During the summer months, from late June to early September, humidity levels soar, reaching an average of 60-70%. The high temperatures and lack of rainfall create a muggy and uncomfortable atmosphere. In contrast, during the winter months, from late December to early March, humidity levels drop significantly, averaging around 20-30%. The cold temperatures and frequent snowfall reduce the amount of moisture in the air, leading to dry and crisp conditions.

Impact on Health and Well-being

The varying humidity levels in Yasuj can impact human health and well-being. High humidity levels during the summer can exacerbate respiratory issues, such as asthma and allergies, as the moist air can irritate the airways. Additionally, the muggy conditions can lead to heat exhaustion and dehydration. On the other hand, low humidity levels during the winter can cause dry skin, chapped lips, and respiratory discomfort. Maintaining appropriate indoor humidity levels through the use of humidifiers or dehumidifiers can help alleviate these issues.

Influence on Agriculture and Wildlife

Humidity levels in Yasuj also play a crucial role in agriculture and wildlife. Crops, particularly those grown in the summer months, require adequate soil moisture to thrive. High humidity levels can help maintain soil moisture and reduce the need for irrigation. However, excessive humidity can also promote fungal diseases and mold growth on crops. For wildlife, humidity levels affect habitat suitability and availability of water sources. Different species have adapted to specific humidity ranges, and changes in humidity can impact their distribution and behavior.

Wind Characteristics

Yasuj, located in southwestern Iran, experiences a unique and distinct wind pattern. The city is situated in a mountainous region, which significantly influences the direction and intensity of the prevailing winds. During the winter months, strong northerly winds known as “Bad-e Samoon” dominate, bringing cold and dry air from the Caspian Sea. These winds can reach speeds of up to 120 km/h (75 mph) and can cause extensive dust storms, reducing visibility and creating hazardous driving conditions.

In contrast, the summer months are characterized by milder southwesterly winds called “Bad-e Shad.” These winds originate from the Persian Gulf and carry warm and humid air, providing relief from the harsh winter conditions. The “Bad-e Shad” winds typically bring increased cloud cover and precipitation, making them crucial for agricultural productivity in the region. Overall, the wind in Yasuj exhibits a distinct seasonal variation, with strong northerly winds during winter and gentler southwesterly winds during summer.

Spring (April-May)

Spring is an ideal time to visit Yasuj, Iran, as the weather is mild and pleasant, with temperatures ranging from 15 to 25 degrees Celsius. The city is adorned with blooming flowers, creating a picturesque landscape. During this season, visitors can enjoy outdoor activities such as hiking, biking, and picnicking in the beautiful parks and natural areas surrounding Yasuj. This is also an excellent time to experience the local hospitality and participate in traditional Iranian festivals.

Autumn (September-October)

Autumn is another favorable season to visit Yasuj, as the weather remains comfortable, with temperatures between 10 and 20 degrees Celsius. The foliage turns vibrant shades of red, orange, and yellow, offering stunning views. During this time, visitors can enjoy leisurely walks through the city’s charming streets, visit historic sites, and indulge in local cuisine. Additionally, autumn is known for its harvest festivals, where locals celebrate the abundance of agricultural produce.

Solar Irradiation and Potential

Yasuj, the capital city of Kohgiluyeh and Boyer-Ahmad Province in Iran, receives abundant solar irradiation. The city experiences an average of 300 sunny days per year, with an average global horizontal irradiance (GHI) of 5.5 kWh/m2 per day. This high level of solar radiation makes Yasuj an ideal location for harnessing solar energy. The province has the potential to generate a significant amount of electricity from solar photovoltaic (PV) systems.

Current Solar Energy Development

Despite its solar potential, Yasuj has not yet fully developed its solar energy sector. There are a few small-scale solar PV projects installed in the city, but they only account for a small fraction of the city’s electricity consumption. However, the government has recognized the potential of solar energy in the region and has implemented incentives to encourage the development of solar projects. These incentives include feed-in tariffs, tax breaks, and low-interest loans. As a result, there is growing interest in solar energy in Yasuj, and several large-scale solar PV projects are currently in the planning or construction stages.

Geographical Features

Yasuj, the capital of Kohgiluyeh and Boyer-Ahmad Province in Iran, lies in a mountainous region known for its rugged and diverse topography. The city is situated in a valley surrounded by towering peaks, including the iconic Mount Dena, the highest mountain in the province. The surrounding landscape is characterized by steep slopes, deep gorges, and numerous rivers and streams. The Shahpour River, one of the main tributaries of the Karun River, flows through the city and adds to its scenic beauty.

Climate and Vegetation

The topography of Yasuj has a significant impact on its climate and vegetation. The city experiences a subtropical highland climate with cold, snowy winters and relatively dry summers. The mountains surrounding Yasuj block the moisture-carrying winds from the Persian Gulf, resulting in lower precipitation levels compared to other parts of the country. The vegetation is typical of mountainous regions, with oak, almond, and pistachio trees dominating the lower slopes, giving way to alpine meadows and sparse vegetation at higher elevations. The presence of numerous springs and rivers supports a diverse range of plants and wildlife, including many endemic species.

Yasuj Airport (YES)

Yasuj Airport (IATA: YES, ICAO: OISY) is the main airport serving Yasuj, the capital city of Kohgiluyeh and Boyer-Ahmad Province in Iran. The airport is located approximately 10 kilometers (6.2 miles) northeast of Yasuj city center. It is a small airport with a single runway that is 2,987 meters (9,800 feet) long and 45 meters (148 feet) wide. The airport is operated by the Airports Company of Iran.

Yasuj Airport offers limited domestic flights to several major cities in Iran, including Tehran, Isfahan, and Shiraz. The airport is served by a number of airlines, including Iran Air, Mahan Air, and Qeshm Air. The airport is also used by the Iranian Air Force.

Yasuj Airport is relatively small and offers limited amenities. The airport has a small terminal building with a few shops and restaurants. The airport also has a small parking lot. The airport is not well-connected to the city center, and passengers will need to take a taxi or bus to reach their destination.

History

Yasuj holds a significant historical and cultural heritage, dating back to ancient times. The region has been inhabited for thousands of years, with archaeological evidence indicating settlements as early as the Neolithic period. During the Achaemenid era (550-330 BCE), Yasuj was a part of the Persian Empire and served as a strategic garrison town. In the following centuries, it fell under the influence of various empires, including the Seleucids, Parthians, and Sassanians.

Culture

Yasuj boasts a rich and diverse culture, deeply rooted in its ancient traditions and natural surroundings. The people of Yasuj are known for their hospitality, strong family values, and love of music and poetry. Traditional handicrafts, such as weaving, pottery, and woodcarving, are popular in the region. Yasuj is also home to several cultural festivals and events, including the annual Yasuj Cherry Festival, showcasing the region’s abundant cherry orchards. The city is renowned for its stunning landscapes, with towering mountains, lush valleys, and crystal-clear rivers, attracting nature enthusiasts and adventurers alike.