September Weather in Lahijan, Iran

Last updated: August 21, 2025

September in Lahijan, Iran presents a dynamic blend of weather, featuring maximum temperatures soaring up to 36°C (97°F) and an average of 23°C (74°F), while the low dips to a refreshing 13°C (56°F). This month experiences significant precipitation, with a total of 118 mm (4.6 in) spread across 15 days, creating a lush, vibrant landscape. The air is comfortably humid, averaging around 58%, adding to the region's enchanting allure. Whether soaking in the warmth or enjoying the sporadic rainfall, September in Lahijan is a captivating experience for visitors and locals alike.

September Temperature in Lahijan

As September rolls into Lahijan, the city begins to embrace the warmth of late summer, with temperatures reflecting a gradual shift towards autumn. The minimum temperature settles at a comfortable 13°C (56°F), while the average climbs to a pleasant 23°C (74°F), creating idyllic days for outdoor exploration. The heat peaks with a maximum reaching 36°C (97°F), yet this warmth marks a notable decline from the scorching highs of July and August. This month strikes a balance, combining the lingering summer heat with a hint of the refreshing coolness that will characterize the upcoming fall.

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

The chart illustrates September temperature patterns in Lahijan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lahijan, 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).
JanFebMarAprMayJunJulAugSepOctNovDec464752586777807973645651
Data source: Temperature data for Lahijan 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 Lahijan

September marks a notable shift in precipitation patterns in Lahijan, Iran, as the region experiences an increase in rainfall, totaling 118 mm (4.6 in) over 15 days. This uptick contrasts sharply with the drier summer months of June and July, which see significantly lower totals of 31 mm (1.2 in) and 95 mm (3.7 in), respectively. As the summer heat recedes, September's precipitation not only revitalizes the landscape but also sets the stage for even wetter months ahead, with October and November typically delivering higher averages of 177 mm (7.0 in) and 180 mm (7.1 in). The consistent increase in rainfall during this time reflects Lahijan's transition into a more humid and vibrant season, making September a pivotal month in the annual weather cycle.

September Precipitation Trends in Lahijan

The chart displays monthly precipitation patterns in Lahijan, 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 Lahijan, September typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec10414111210848319585118177180117
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Lahijan

In September, Lahijan, Iran, experiences a noticeable shift in humidity, averaging around 58%. This marks a decrease from the more humid summer months, with August plummeting to 49%, indicating a transition towards the milder autumn climate. While early months of the year demonstrate consistently higher humidity levels, peaking at 75% in January and February, the summer showcases a steady decline, ultimately leading to September's more moderate conditions. As the year progresses, October brings a resurgence in humidity, climbing back to 73%, hinting at the cyclical nature of Lahijan's climate. Overall, September stands as a unique pivot point, bridging the humidity extremes of summer and the impending return of dampness in the fall.

September Average Humidity in Lahijan

This chart illustrates the average monthly humidity levels in Lahijan, 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 Lahijan is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%75%72%65%65%65%61%49%58%73%75%72%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Lahijan

As September rolls into Lahijan, Iran, the UV Index remains a notable 8, categorizing it as very high and indicating a burn time of just 15 minutes. This month reflects a slight decline from the peak of 11 observed in May, yet it continues a trend of elevated UV exposure that has persisted since March. Despite the retreat from extremes, outdoor enthusiasts should remain vigilant, as the UV levels in September still demand timely sun protection. Transitioning into the cooler months, October will see a further dip to a 6, suggesting a respite from the intense summer rays. To stay informed, check out the comprehensive details at Lahijan UV Index.

Maximum UV Index Levels in Lahijan for September

The chart shows the monthly maximum UV Index (UVI) for Lahijan 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 Lahijan typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec448811101098643
Data source: Lahijan 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 Lahijan

As the summer fades into autumn, September in Lahijan boasts a delightful 323 hours of sunshine, showcasing a gradual yet vibrant transition. This month continues to benefit from the lingering warmth of summer, standing out amidst a seasonal decline in daylight compared to the sun-drenched peak of June and July with their impressive 392 and 383 hours respectively. The month serves as a bridge, retaining a healthy dose of sunlight that softens the arrival of cooler autumn months, particularly in contrast to the shorter days ahead in October and November. September’s abundant sunshine enhances the beauty of Lahijan, inviting residents and visitors alike to embrace the last rays of warmth before the chill sets in.

Monthly Sunshine Duration in Lahijan: September Highlighted

The September sunshine duration represents the total number of hours Lahijan 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.
JanFebMarAprMayJunJulAugSepOctNovDec200h242h297h315h378h392h383h366h323h287h230h242h
Data source: Lahijan September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Lahijan During September

In Lahijan, Iran, the likelihood of sunny weather in September reflects a notable trend as the summer months transition into autumn. With a 40% chance of sunshine, September experiences a dip compared to the vibrant days of August, which boasts a 71% chance. This decrease signals the onset of cooler temperatures and increased cloud cover. Despite the lower probability of sun, September still offers a decent amount of brightness, making it a pleasant time for outdoor activities before the rainier months set in. Overall, while the sunshine might not be as prominent as in peak summer, September retains its charm with intermittent sunny spells.

Percentage of Sunny Days in September in Lahijan

The chart illustrates the percentage of sunny days in Lahijan 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 Lahijan experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec66%47%31%51%47%63%47%71%40%33%51%63%
Data source: Lahijan September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Lahijan in September

In September, Lahijan, Iran, experiences a gradual transition as daylight hours begin to wane, offering around 12 hours of sunlight. This marks a noticeable shift from the abundant light of summer, which sees peak daylight hours of 14 hours in June, July, and August. As the season shifts, the days grow shorter, following a natural cycle that sees the daylight hours decrease steadily from early spring's 11 hours in March to winter's 9 hours in January. This rhythm reflects the changing seasons, highlighting a gentle descent from the vibrant summer days into the crisper, shorter afternoons of autumn. As September unfolds, residents can relish in the lingering warmth while preparing for the cozy embrace of the months to come.

Average Daylight Hours in Lahijan for September

The chart illustrates the variation in daylight duration in Lahijan throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 54m10h 48m11h 58m13h 9m14h 9m14h 39m14h 24m13h 31m12h 23m11h 11m10h 9m9h 38m
Data source: Lahijan daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Lahijan

In September, the wind in Lahijan, Iran, reaches an average speed of 2.2 m/s (5 mph), consistently mirroring the breezy conditions found in the preceding months of March, July, and February. Throughout the year, the wind tends to maintain a gentle demeanor, with most months hovering around the 2.0 m/s mark. The slight uptick in September symbolizes a transition from the warmth of summer to the cooler embrace of autumn, enticing visitors to explore the scenic landscapes. As the seasons shift, the steady breeze serves as a reminder of Lahijan's inviting climate, perfect for leisurely strolls and outdoor adventures.

Average September Wind Speed in Lahijan

The chart displays monthly wind speed patterns in Lahijan, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.12.22.21.92.12.02.22.02.2 m/s2.02.02.2
Data source: Lahijan September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Lahijan Compares to Other Months

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

September and January present strikingly contrasting weather conditions. In September, temperatures range from a minimum of 13°C (56°F) to a maximum of 36°C (97°F), creating a warm and often humid environment with an average temperature of 23°C (74°F) and 118 mm of precipitation over 15 days. This month experiences a moderate humidity level of 58%.

In contrast, January brings much colder temperatures, with a minimum of -7°C (19°F) and an average of 8°C (47°F), reaching a maximum of 22°C (73°F). The month sees less precipitation, totaling 103 mm over just 9 days, but with a higher humidity of 75%. For more details on January weather, you can check Lahijan weather in January.

September and February present starkly contrasting weather conditions. In September, temperatures range from a mild 13°C (56°F) to a sizzling 36°C (97°F), with an average of 23°C (74°F). While it is relatively warm, the month also sees considerable rainfall, totaling 118 mm (4.6 in) over 15 days, and humidity sits at a moderate 58%. In contrast, February experiences much cooler temperatures, with a minimum of -7°C (20°F) and a maximum of 26°C (80°F), averaging only 8°C (47°F). This month sees even higher precipitation at 141 mm (5.6 in) across 12 days, coupled with increased humidity at 75%. For more insights on February weather, you can visit Lahijan weather in February.

September and March present contrasting weather patterns, reflecting the transition from summer to spring. In September, temperatures peak at a warm average of 23°C (74°F), reaching highs of 36°C (97°F), while the minimum temperature rests at a mild 13°C (56°F). Despite the warmth, September experiences considerable rainfall, with 118 mm (4.6 in) over 15 days and a humidity level of 58%. In contrast, March offers a cooler climate, with average temperatures around 11°C (52°F) and maximums of 29°C (84°F). The minimum temperature drops to 0°C (32°F), and while March has slightly lower precipitation at 112 mm (4.4 in) over 14 days, it is marked by higher humidity at 72%. For a more detailed look at this month’s weather, visit Lahijan weather in March.

September and April showcase stark differences in weather characteristics. In September, temperatures range from a minimum of 13°C (56°F) to a scorching maximum of 36°C (97°F), with an average of 23°C (74°F). The month experiences considerable rainfall, with 118 mm (4.6 in) spread over 15 days and a humidity level of 58%. In contrast, April sees much cooler temperatures, with a low of 1°C (35°F), an average of 14°C (58°F), and a maximum of 30°C (86°F). Precipitation in April is slightly less at 108 mm (4.2 in) over 11 days, accompanied by a higher humidity of 65%. For more detailed information, check out Lahijan weather in April.

September tends to be warmer than May, with average temperatures reaching 23°C (74°F) compared to May's 20°C (68°F). However, September can also feature more extreme highs, peaking at 36°C (97°F), whereas May's maximum temperature is a slightly lower 35°C (96°F). In terms of precipitation, September experiences significantly more rainfall, with 118 mm (4.6 in) across 15 days, while May sees only 48 mm (1.9 in) over 9 days. Additionally, May has higher humidity at 65%, compared to 58% in September. For more details on May weather, you can check this link: Lahijan weather in May.

When comparing the weather in September to that of June, both months exhibit warm temperatures, but September tends to have a broader range. In September, the minimum temperature is slightly cooler at 13°C (56°F), while the average reaches 23°C (74°F) and can peak at 36°C (97°F). This month also experiences more precipitation, averaging 118 mm (4.6 in) over 15 days, resulting in a humidity level of 58%. In contrast, June has a more consistent warmth, with minimums averaging 15°C (59°F) and maximums around 35°C (95°F), accompanied by significantly lower rainfall of 31 mm (1.2 in) over just 6 days and a higher humidity of 65%. For more detailed insights, you can check Lahijan weather in June.

In September, the weather shows a noticeable shift compared to July. The minimum temperature drops slightly from 16°C (62°F) in July to 13°C (56°F) in September, resulting in a cooler average of 23°C (74°F) versus July's warmer average of 27°C (81°F). Additionally, September experiences slightly higher maximum temperatures, peaking at 36°C (97°F), while July reaches 37°C (99°F). However, September brings more rainfall, accumulating 118 mm (4.6 inches) over 15 days, compared to July's 95 mm (3.7 inches) over 12 days. Humidity remains relatively similar, with September at 58% and July at 61%. For a more detailed look at July's weather, visit Lahijan weather in July.

In comparing the weather between September and August, September tends to be slightly cooler, with average temperatures ranging from a minimum of 13°C (56°F) to a maximum of 36°C (97°F), while August showcases a higher average temperature of 26°C (79°F), with a minimum of 14°C (58°F) and a similar maximum of 36°C (98°F). September also features increased humidity at 58% compared to August's 49%. Additionally, September experiences more precipitation, totaling 118 mm (4.6 in) over 15 days, while August receives only 85 mm (3.3 in) over 11 days. For a detailed look at local conditions, you can visit Lahijan weather in August.

September typically experiences warmer temperatures, with an average of 23°C (74°F) and maximums reaching up to 36°C (97°F), while October leads in cooler weather with an average of 18°C (65°F) and a maximum of 33°C (91°F). This transition brings a notable drop in minimum temperatures from 13°C (56°F) in September to 8°C (46°F) in October. Additionally, October sees a significant increase in precipitation, totaling 177 mm (7.0 in) over 15 days, compared to September's 118 mm (4.6 in) also spread across 15 days. Humidity levels also rise, reaching 73% in October compared to 58% in September, creating a distinctly wetter and more humid atmosphere as the season progresses. For more detailed information, you can visit Lahijan weather in October.

In September, weather tends to be warm and somewhat humid, with average temperatures around 23°C (74°F) and a maximum of 36°C (97°F). The month experiences moderate rainfall, totaling 118 mm (4.6 in) over 15 days, contributing to a relatively comfortable humidity level of 58%. In contrast, November brings considerably cooler temperatures, with averages dropping to 13°C (56°F) and maximums reaching 29°C (84°F). This month also sees increased precipitation, totaling 180 mm (7.1 in) across 14 days, along with higher humidity at 75%. For more details on specific weather conditions, check Lahijan weather in November.

September and December present a stark contrast in weather conditions. In September, temperatures range from a minimum of 13°C (56°F) to a maximum of 36°C (97°F), with an average of 23°C (74°F), creating warm and often humid days with a humidity level of 58%. The month sees 118 mm (4.6 in) of precipitation over 15 days. Conversely, December brings a chill, with temperatures dropping significantly to a minimum of -4°C (25°F) and a maximum of 27°C (81°F), while averaging around 10°C (51°F). This month, despite having slightly less precipitation at 117 mm (4.6 in) over just 10 days, experiences a higher humidity level of 72%. For more detailed insights on December weather, visit Lahijan weather in December.

Compare Lahijan's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Lahijan

September in Lahijan marks a transition from the intense heat of summer to more moderate conditions, with pleasant temperatures averaging around 23°C (74°F). The month experiences a notable increase in rainy days, contributing to a total precipitation of 118 mm (4.6 in) over 15 days, which helps to bring a refreshing change to the typically humid climate, recorded at around 58%. As the vibrant greenery of the landscape flourishes, September sets the stage for the charming autumn months ahead. For more detailed information on what to expect throughout the year, explore Lahijan Climate.