Climate and monthly weather forecast
Ilam, Iran

The conditions of the climate in Ilam, Iran, are classified as Csa under the Köppen climate classification, corresponding to a Mediterranean climate with hot summers. Nestled within the highlands, Ilam experiences a considerable variation in weather parameters throughout the year.

Diving into the specifics, temperature highs for the year inch from a mild 9°C (48.2°F) in January and reach a scorching high of 35.8°C (96.4°F) by July. Concurrently, temperature lows embark from a chilly -0.3°C (31.5°F) in the first month of the year, and crescendo to a warm 21.2°C (70.2°F) in July. The humidity follows a U-shaped trend throughout the year, hitting a minimum of 25% during the summer months of June, July and August, and peaking at 66% in January.

Rainfall patterns reveal a striking tendency. While a high volume of rain is observed from January to March with peak rainfall of 123mm (4.84") in March, the region turns arid, experiencing virtually no rainfall from June to September. Simultaneously, daylight hours progressively increase from January to June, hold steady in July and decline through to December.

Given the relative climate parameters, the months from April to June emerge as the ideal time to visit Ilam. In these months, temperatures remain pleasant, oscillating between lows of 8.6°C (47.5°F) and highs of 32.4°C (90.3°F). Daylight hours are abundant, ranging from 13 hours in April to a dazzling 14.4 hours in June. Additionally, the decreased humidity of 49% to 28% and infrequent rainfall, 70mm (2.76") in April dwindling down to 1mm (0.04") in June, champion optimum weather conditions.

Visiting Ilam during the January-March period presents challenges. Despite daylight hours hovering between 10 and 12 hours, temperatures swing between -0.3°C (31.5°F) and 14°C (57.2°F), presenting potentially inclement conditions. Furthermore, the high humidity, touching 66% in January, coupled with a significant volume of rain peaking at 123mm (4.84") in March, can make this time of year particularly uncomfortable.

Spring in Ilam, spanning March to May, signifies a transition from the cold end of winter to the approach of summer. During this season, highs begin at 14°C (57.2°F) in March and climb to 26.3°C (79.3°F) in May. Likewise, lows gradually increase from 3.7°C (38.7°F) to 13.8°C (56.8°F). Rainfall is a defining feature of this season, with volumes tapering from a high 123mm (4.84") in March to 26mm (1.02") in May. The humidity eases from 57% to 38%, making the air considerably more comfortable even as daylight hours extend from 12 hours in March to 13.9 hours come May.

With the arrival of summer, June to August, Ilam experiences the brunt of its Mediterranean climate. Temperature highs soar from 32.4°C (90.3°F) to 35.8°C (96.4°F) in July before slightly falling to 35.3°C (95.5°F) in August. Heat is the defining feature of this period with lows ranging from 18.1°C (64.6°F) to 21.2°C (70.2°F). Remarkably, the region goes through virtually no rainfall in these months, peaking at a mere 1mm (0.04") in July. Moreover, the humidity is at its lowest, averaging 25%, and daylight hours are aplenty, hovering around the 14-hour mark.

In Autumn, spanning September to November, Ilam slowly retreats from the scorching summer and prepares for winter. High temperatures start to decrease from 31.6°C (88.9°F) in September to a much cooler 17.1°C (62.8°F) by November, while lows cool down from 17.3°C (63.1°F) to 6.3°C (43.3°F) during the same period. The region experiences a minor return of rain in September, 1mm (0.04"), gradually intensifying to 80mm (3.15") in November. Additionally, humidity begins to rise and daylight hours recede, descending from 12.4 hours in September to 10.4 hours come November.

Winter in Ilam ushers in the most drastic climate changes. From December to February, temperature highs waver between 9°C (48.2°F) and 10.2°C (50.4°F), and lows dip from 1.9°C (35.4°F) to -0.3°C (31.5°F). Interestingly, despite the decrease in daylight hours, falling to 10 hours in December and February, the volume of rain stagnates between 95mm (3.74") in December and 104mm (4.09") in February. Furthermore, humidity climbs back, reaching its highest point at 66% in January, and completes the annual weather cycle in Ilam.

January brings the year's cardigan weather to Ilam, Iran. The landscape shivers through chilly daytime highs, which barely nudge the mercury to 9°C (48.2°F). Compared to February's slightly warmer weather, January's frosty chill becomes quite noticeable. Weather in January »

Late winter weather in February factors in slightly warmer days and nights compared to January. Rainfall becomes more sporadic during this month, with relative humidity at 62%. While March welcomes a distinctive shift in weather conditions, in February, occasional flurries might yet kiss Ilam's terrain. Weather in February »

Ilam's weather in March buckles into brisk evenings, a departure from February's wintry nights. Steadily rising daytime temperatures signal the advent of springtime. The city experiences an increase in daylight hours to 12, ushering in more sunshine and longer days. Weather in March »

April's weather in Ilam segues into a more temperate climate, showing striking contrast to March's relatively colder conditions. Longer daylight hours up to 13 introduce more sunshine and warmer days. The decrease in April's rainfall highlights the dryness of the month, as landscapes bask in the sun. Weather in April »

May's weather in Ilam, Iran, alters dramatically, transitioning from the comfortable conditions seen in April to the hotter environment that characterises summer. This significant rise in temperature, reaching an average high of 26.3°C (79.3°F), fairly marks the beginning of the hot, dry period in the region. Weather in May »

June takes the climatic reins from May and steers the weather in Ilam towards peak summer conditions. The striking dryness of June trails only slightly behind July’s, its moisture content barely discernible, which heightens the prominence of its sun-soaked days. Weather in June »

July stands as the year's torrid month in Ilam, yielding the highest average temperature of 35.8°C (96.4°F). The heat intensifies, a stark increase compared to June's already toasty climate. Though July shares similar characteristics with August, it reels under this intense temperature, peaking in oppressive heat. Weather in July »

August's weather continues July's sizzling trend, barely cooling down as days hover around the annual high. Regardless of September's promise of a slight reprieve, August in Ilam remains ruthlessly warm. However, with a marginal dip in daylight hours and temperature, the peak summer begins its slow withdrawal. Weather in August »

September in Ilam signals a shift in seasons as summer heat gives way to autumn's mildly cooler temperament. A perceptible decrease in temperature sets September apart from August's more intense summertime conditions. Despite this cooldown, the rainfall increases only slightly to 1mm (0.04"), an indicator of the dryness still prevalent in the region. Weather in September »

October's weather fully embraces autumns' charm in Ilam. It deviates from September's slightly warmer conditions by moderating day and night temperatures. The rainfall, which marks a significant jump to 26mm (1.02"), introduces wetter days into the mix. Weather in October »

The weather in Ilam through November marks a transition from the mild autumn phase of October to the colder conditions indicating winter's footsteps. Relative humidity rises to 51%, a noteworthy increase that signals a transition into a more humid period. Weather in November »

Ilam closes out the year in December with distinct winter weather. Descending from November's slightly warmer days and nights, December's colder temperatures cursorily prepare the locals for January's freezing chill. A total rainfall measurement of 95mm (3.74") signifies one of the wetter months, ending the year on a damp note. Weather in December »