September Weather in Khorramshahr, Iran

Last updated: August 21, 2025

September in Khorramshahr, Iran showcases the extreme warmth characteristic of the region. With maximum temperatures soaring to 49°C (121°F) and an average of 36°C (97°F), residents experience a notably hot period. The mercury rarely dips below a minimum of 21°C (69°F), creating a consistently high temperature profile. Adding to the arid conditions, the month records only 1 mm (0.0 in) of precipitation, with no rainy days, and an incredibly low humidity level of 17%. This combination of heat and dryness paints a vivid picture of September in Khorramshahr, making it essential for residents and visitors alike to prepare for the sweltering climate.

September Temperature in Khorramshahr

In September, Khorramshahr experiences a notable transition as summer begins to wane, yet the temperatures remain quite high. With a minimum of 21°C (69°F) and an average reaching a sizzling 36°C (97°F), the city continues to bask in warmth, with maximums soaring to 49°C (121°F). This month marks a peak in the heat, following the intense summer months of July and August, where temperatures frequently hit extremes. The gradual shift in the weather heralds the upcoming fall, but the warmth lingers, making September a month where the sizzle of summer still makes its mark before cooler days ahead.

September Weather in Khorramshahr: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Khorramshahr, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Khorramshahr, September typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec576270829310210510297857061
Data source: Temperature data for Khorramshahr generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Khorramshahr

In Khorramshahr, Iran, September marks a notably dry period, with a mere 1 mm of precipitation recorded and no rainy days. This follows an extended summer of zero rainfall from June through August, highlighting the region's arid climate during these months. As the year progresses, a significant shift occurs in November, where precipitation spikes to 96 mm over five days, signaling the onset of the wetter season. The transition from the summer dry spell to autumnal rain showcases the dramatic variability in Khorramshahr's weather patterns, where a brief respite in September paves the way for the more substantial autumn rains that are essential for the region's agriculture and ecosystem.

September Precipitation Trends in Khorramshahr

The chart displays monthly precipitation patterns in Khorramshahr, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Khorramshahr, September typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec11181685000189637
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Khorramshahr

September in Khorramshahr, Iran, marks a slight uptick in humidity, settling at 17%. This increment follows the exceptionally dry months of July and August, where humidity plummeted to an all-time low of 11% and 12%, respectively. While September still maintains a relatively low humidity level, it serves as a precursor to the more humid months ahead, with October forecasted at 33% and a further increase to 48% in November. This trend reflects a seasonal transition, gradually shifting from the arid heat of summer toward the more moderate and humid conditions typical of autumn in the region.

September Average Humidity in Khorramshahr

This chart illustrates the average monthly humidity levels in Khorramshahr, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Khorramshahr is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec46%38%42%39%32%17%11%12%17%33%48%50%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Khorramshahr

In September, Khorramshahr experiences a UV Index of 9, placing it in the very high exposure category. As summer transitions to autumn, the UV levels slightly decrease from the summer highs of 11 earlier in the season, but they remain significant enough to warrant caution. With a burn time of just 15 minutes, outdoor enthusiasts are advised to take protective measures against potential skin damage. This trend illustrates a gradual decline in UV intensity as the year progresses, moving from extreme levels in the summer to more moderate conditions in the colder months. For those planning outdoor activities, staying informed is key—explore the detailed UV forecasts at Khorramshahr UV Index.

Maximum UV Index Levels in Khorramshahr for September

The chart shows the monthly maximum UV Index (UVI) for Khorramshahr in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Khorramshahr typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec56910111111109754
Data source: Khorramshahr September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

September Sunshine in Khorramshahr

As September unfolds in Khorramshahr, the city basks in a generous 337 hours of sunshine, marking a delightful transition from the peak summer heat. This month continues the trend observed throughout the warmer seasons, where sunlight reaches its annual zenith, peaking in July with an impressive 385 hours. However, September’s abundant rays signal the gradual shift towards autumn, resonating with the declining sunshine hours seen from the summer’s peak. Following the radiant month of August at 367 hours, September remains a luminous time, while hinting at the approaching cooler months of October and November, which usher in a noticeable dip beginning with 315 hours. The interplay of sunshine in this seaside town showcases a vibrant tapestry of changing seasons, each month offering its unique charm.

Monthly Sunshine Duration in Khorramshahr: September Highlighted

The September sunshine duration represents the total number of hours Khorramshahr experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec228h276h329h333h371h381h385h367h337h315h278h275h
Data source: Khorramshahr September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Khorramshahr During September

In Khorramshahr, Iran, September boasts an impressive 99% chance of sunny weather, making it one of the sunniest months of the year. This trend of abundant sunshine peaks in the summer, with both June and July also reaching 99%, followed closely by August at 94%. As summer transitions into autumn, the likelihood of clear skies remains remarkably high in September before tapering off into the cooler months. With October still retaining a solid 93% chance of sunshine, September truly embodies the essence of summer's farewell, allowing residents and visitors alike to enjoy its radiant warmth and outdoor activities.

Percentage of Sunny Days in September in Khorramshahr

The chart illustrates the percentage of sunny days in Khorramshahr throughout the year, with September highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Khorramshahr experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec74%68%83%64%85%99%99%94%99%93%78%45%
Data source: Khorramshahr September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Khorramshahr in September

In September, Khorramshahr enjoys about 12 hours of daylight, marking a slight decline from the peak illumination of 14 hours in June. This transition signals the gradual onset of autumn, following a bright summer that saw both June and July basking in extended sunlight. As the year progresses from September into October, daylight hours continue to shrink, hinting at the upcoming winter months. This pattern highlights a rhythmic ebb and flow of sunlight throughout the year, with each season bringing its own unique charm to this vibrant city.

Average Daylight Hours in Khorramshahr for September

The chart illustrates the variation in daylight duration in Khorramshahr throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 24m11h 6m11h 59m12h 54m13h 41m14h 4m13h 52m13h 11m12h 18m11h 23m10h 36m10h 12m
Data source: Khorramshahr daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Khorramshahr

In September, Khorramshahr experiences a gentle breeze with an average wind speed of 5.0 m/s (11 mph), marking a notable increase from the preceding months. This rise in wind speed is part of a transitional trend observed in the late summer and early autumn months, where winds typically pick up from the more tranquil summer months, such as August at 4.1 m/s (9 mph). As the summer heat begins to wane, September's winds set the stage for the cooling autumn air, creating a pleasant environment that residents and visitors alike enjoy. This pattern reveals the shift in seasonal dynamics, as Khorramshahr's winds remain prevalent while gradually tending towards the calmer conditions of October, which sees a slight decrease back to 4.2 m/s (9 mph).

Average September Wind Speed in Khorramshahr

The chart displays monthly wind speed patterns in Khorramshahr, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.23.84.64.64.07.24.94.15.0 m/s4.23.53.9
Data source: Khorramshahr September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Khorramshahr Compares to Other Months

Weather in Khorramshahr varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Khorramshahr, focusing on differences in temperature, rainfall, humidity, and UV levels.

September and January present stark contrasts in weather. In September, temperatures soar with a minimum of 21°C (69°F) and can reach a sweltering maximum of 49°C (121°F), making it one of the hottest months of the year. This period is characterized by negligible precipitation, averaging only 1 mm, and a low humidity of 17%. Conversely, January experiences a much cooler climate, with temperatures ranging from a minimum of 2°C (35°F) to a maximum of 27°C (81°F) and an average of 14°C (58°F). This month sees more precipitation, around 11 mm, over two days, along with a higher humidity level of 45%. Such differences highlight the dramatic seasonal variations in weather; for a closer look at the specifics, check out Khorramshahr weather in January.

In comparing the weather between September and February, significant differences emerge. September boasts scorching temperatures, with minimums around 21°C (69°F) and maximums peaking at a sweltering 49°C (121°F). The month experiences virtually no precipitation and maintains a low humidity level of 17%. In contrast, February offers much cooler conditions, featuring minimum temperatures of 1°C (33°F) and a comfortable average of 17°C (62°F), reaching a maximum of 31°C (88°F). This month also sees more precipitation, totaling 18 mm (0.7 in) over three days, and a higher humidity of 38%. For more detailed insights, check out Khorramshahr weather in February.

September and March present strikingly different weather conditions. In September, temperatures soar with a minimum of 21°C (69°F) and an average of 36°C (97°F), peaking at a sweltering 49°C (121°F). The month is characterized by very low humidity at 17% and virtually no precipitation. In contrast, March offers much milder temperatures, starting at a minimum of 7°C (44°F), averaging 21°C (71°F), and reaching a maximum of 40°C (105°F). This month also sees more moisture, with 16 mm (0.6 in) of precipitation over three days and higher humidity levels at 42%. For a more detailed look at March weather, you can check out Khorramshahr weather in March.

September and April display distinctly different weather patterns. In September, temperatures soar to an average high of 36°C (97°F), peaking at 49°C (121°F), while the minimum remains relatively warm at 21°C (69°F). This month experiences virtually no rainfall, with just 1 mm of precipitation recorded and an exceptionally low humidity of 17%. In contrast, April brings a milder climate, with average temperatures around 28°C (82°F), maxing out at 43°C (110°F) and a minimum of 13°C (55°F). Rainfall is more common in April, with 8 mm of precipitation over 2 days, and humidity levels climb to 39%. For more detailed insights, you can check Khorramshahr weather in April.

September and May present distinct weather characteristics, with September generally being hotter and drier. September boasts an average temperature of 36°C (97°F) and can reach highs of 49°C (121°F), while May has a slightly cooler average of 34°C (93°F) and a maximum of 48°C (119°F). In addition to the higher temperatures, September experiences virtually no precipitation, with recorded rainfall at just 1 mm (0.0 in) over 0 days, compared to May's 5 mm (0.2 in) over 1 day, indicating a wetter climate. Furthermore, the humidity in May is significantly higher at 32%, while September remains quite dry at only 17%. For a more detailed look at May's weather, you can check Khorramshahr weather in May.

When comparing the weather between September and June, both months exhibit extremely high temperatures, but June is generally hotter with an average of 39°C (102°F) compared to September’s average of 36°C (97°F). Additionally, June features a higher maximum temperature of 52°C (125°F), while September peaks at 49°C (121°F). Both months experience virtually no precipitation and maintain a consistent humidity level of 17%. For more detailed information on June's climate, you can visit this link: Khorramshahr weather in June.

In comparing the weather of September and July, September offers slightly cooler temperatures, with a minimum of 21°C (69°F), an average of 36°C (97°F), and a maximum of 49°C (121°F). In contrast, July presents hotter conditions, featuring a minimum of 29°C (85°F), an average of 40°C (105°F), and an even higher maximum of 52°C (126°F). Both months experience negligible precipitation, with July recording no rainfall, just like September, which also sees no rain and has a lower humidity level of 17% compared to July's 11%. For more details on July weather specifics, refer to Khorramshahr weather in July.

In comparing the weather of September and August, September experiences a slightly lower average temperature, with a minimum of 21°C (69°F) and an average of 36°C (97°F), compared to August's minimum of 27°C (81°F) and an average of 39°C (103°F). Both months have minimal precipitation, with September recording 1 mm (0.0 in) and August having none, but August's maximum temperature reaches a higher peak of 52°C (125°F) versus September's maximum of 49°C (121°F). Additionally, humidity levels are marginally higher in September at 17% compared to 12% in August. For a detailed look at August's weather, you can visit Khorramshahr weather in August.

September in Khorramshahr experiences scorching temperatures, with a minimum of 21°C (69°F) and an average of 36°C (97°F), reaching highs of up to 49°C (121°F). The month is characterized by dry conditions, reporting no precipitation and only 17% humidity. In contrast, October sees a noticeable drop in temperatures, with minimums of 12°C (54°F) and an average of 30°C (85°F), peaking at 45°C (113°F). Additionally, October welcomes a slight increase in humidity to 33% and some precipitation, with 8 mm recorded over the course of a day. For more detailed information, visit Khorramshahr weather in October.

September and November present stark contrasts in weather conditions. In September, temperatures soar with a minimum of 21°C (69°F) and peak at a scorching 49°C (121°F), while humidity remains low at 17% and precipitation is virtually nonexistent. In contrast, November experiences a significant drop in temperatures, with a minimum of 8°C (46°F) and a maximum of 36°C (97°F), accompanied by increased humidity at 48% and substantial rainfall amounting to 96 mm (3.8 in) over five days. The shift from the intense heat of September to the cooler, wetter November highlights the changing seasons. For more details, you can check Khorramshahr weather in November.

In September, the weather is characterized by intense heat, with temperatures soaring to an average of 36°C (97°F) and a maximum reaching a sweltering 49°C (121°F). The humidity is notably low at 17%, and there is no recorded precipitation during the month, creating a dry and arid atmosphere. In contrast, December brings much cooler temperatures, with an average of 16°C (61°F) and a maximum of 28°C (83°F). This month experiences a significant increase in humidity, reaching 50%, along with some rainfall totaling 37 mm (1.4 in) over four days, contributing to a more comfortable and refreshing climate. For more details, you can check the Khorramshahr weather in December.

Compare Khorramshahr's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Khorramshahr

In September, Khorramshahr experiences a striking transition, characterized by scorching temperatures that can soar up to 49°C, making it one of the hottest months of the year. Unlike the higher humidity levels found in other months, September offers a notably dry atmosphere with an average humidity of just 17%, resulting in a parched but stable climate. With almost no precipitation recorded, this month stands out for its relentless sunshine. As summer's grip loosens, the intense warmth and absence of rain create a unique weather pattern that highlights Khorramshahr's extreme climate. For more insights, explore the comprehensive details at Khorramshahr Climate.