September Weather in Qazvin, Iran

Last updated: August 21, 2025

In September, Qazvin, Iran, experiences a striking variation in temperature, with highs soaring up to 37°C (99°F) and lows dipping to 6°C (43°F), resulting in an average of around 22°C (72°F). This month is characterized by relatively low precipitation, with only 3 mm recorded over the course of just one day, contributing to a humidity level of 58%. As summer wanes, September in Qazvin offers a blend of warmth and mild conditions, making it an intriguing time for weather watchers and travelers alike.

September Temperature in Qazvin

In September, Qazvin experiences a delightful transition as summer wanes and autumn approaches. With a minimum temperature of 6°C (43°F), the nights begin to cool, providing a refreshing contrast to the sweltering heat of the preceding months. Daytime warms up to an average of 22°C (72°F), making it an ideal time for outdoor activities. The peak temperature can reach up to 37°C (99°F), although this is a noticeable drop from the summer highs. This month marks a significant shift, as the climate transforms into more temperate conditions, paving the way for the crispness of fall while still allowing for those last glimpses of summer warmth.

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

The chart illustrates September temperature patterns in Qazvin, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Qazvin, 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).
JanFebMarAprMayJunJulAugSepOctNovDec343746556475807772594638
Data source: Temperature data for Qazvin 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 Qazvin

September in Qazvin, Iran, marks the continuation of a notably dry stretch, with precipitation measuring just 3 mm (0.1 in) over a single day. Following the summer months, which are characterized by minimal rainfall, September offers little relief to parched conditions. Typically, this month serves as a transitional phase, paving the way for the slightly wetter autumn months ahead. As we look at the broader trend, it’s clear that precipitation begins to rise in October, with an expected increase in both amount and frequency of rainy days, signaling a shift towards a wetter climate as the year progresses.

September Precipitation Trends in Qazvin

The chart displays monthly precipitation patterns in Qazvin, 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 Qazvin, September typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec41787190485433375354
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Qazvin

As September arrives in Qazvin, Iran, the humidity begins to shift from the summer's dry warmth to the more moderate levels of autumn. The month sees an increase in humidity to 58%, a noticeable rise from August's 49%. This transition marks a move away from the dry heat of summer, which peaked in July at 61%. Interestingly, September's humidity is in line with the season's changing temperatures, sliding toward the higher levels seen earlier in the year, with October anticipating a return to 73%. Overall, September serves as a bridge between the parched summer months and the more humid fall and winter seasons, reflecting the natural ebb and flow of climate in this region.

September Average Humidity in Qazvin

This chart illustrates the average monthly humidity levels in Qazvin, 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 Qazvin 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 Qazvin

As September rolls into Qazvin, Iran, residents can expect a UV Index of 10, categorizing it as very high on the exposure scale. This reflects a continuation of intense sunlight from the summer months, with a recommended burn time of just 15 minutes before the risk of skin damage increases. Compared to the peak of May through August, where the index reached extreme levels, September indicates a slight reprieve yet still maintains significant solar intensity. It’s essential for individuals venturing outdoors to plan accordingly and adopt sun protection measures. For more detailed insights, check the Qazvin UV Index.

Maximum UV Index Levels in Qazvin for September

The chart shows the monthly maximum UV Index (UVI) for Qazvin 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 Qazvin typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec55991312111010754
Data source: Qazvin 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 Qazvin

As summer gives way to autumn in Qazvin, Iran, September brings a delightful balance of sunshine with 343 hours of radiant light. This marks a transition from the peak summer months of June and July, which bask in the warmth of 398 hours each, to the cooler days of October, which sees a decline to 315 hours. Despite the decrease, September still offers a generous amount of sunshine compared to the earlier months of the year, suggesting a lingering warmth before the chill of winter sets in. With its vibrant days and softer light, September invites visitors and locals alike to savor the beautiful outdoors, making it a sweet spot in Qazvin's climatic tapestry.

Monthly Sunshine Duration in Qazvin: September Highlighted

The September sunshine duration represents the total number of hours Qazvin 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.
JanFebMarAprMayJunJulAugSepOctNovDec221h260h320h337h387h398h398h379h343h315h259h266h
Data source: Qazvin September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Qazvin During September

In September, Qazvin, Iran, boasts a remarkable 93% chance of sunny weather, making it one of the sunniest months of the year. This peak in sunshine follows the summer months of June, July, and August, which also display high probabilities of clear skies, with July at 84% and August at 82%. Interestingly, the trend suggests a notable increase in sunlit days as summer transitions into autumn, contrasting sharply with the cooler and cloudier months that follow, like November at 54%. This favorable September weather presents an ideal opportunity for outdoor activities, inviting residents and visitors alike to bask in the warmth and brightness of early fall.

Percentage of Sunny Days in September in Qazvin

The chart illustrates the percentage of sunny days in Qazvin 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 Qazvin experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec73%64%56%60%61%91%84%82%93%76%54%66%
Data source: Qazvin September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Qazvin in September

As September unfolds in Qazvin, Iran, the city experiences a gradual transition in daylight duration, with 12 hours of sunlight illuminating the days. Following the peak brightness of summer, where months like June, July, and August bask in a steady 14 hours of daylight, September signifies the beginning of a gentle decline. This reduction continues into the autumn months, with October offering 11 hours and November, a further decrease to 10 hours. The trend reflects the natural ebb and flow of seasons, where longer summer days give way to the cozier, shorter days of fall. As daylight fades, the vibrant hues of autumn take center stage, inviting residents to embrace the changing scenery and a different rhythm of life.

Average Daylight Hours in Qazvin for September

The chart illustrates the variation in daylight duration in Qazvin throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 59m10h 51m11h 58m13h 7m14h 5m14h 34m14h 19m13h 28m12h 22m11h 13m10h 14m9h 43m
Data source: Qazvin daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Qazvin

As summer transitions to fall in Qazvin, Iran, September ushers in a refreshing breeze, with an average wind speed of 2.9 m/s (7 mph). This marks a noticeable increase compared to the 2.5 m/s (6 mph) recorded in August, hinting at the changing seasons. Observing the trend throughout the year, wind speeds in the late summer months begin to climb, peaking in July at 3.1 m/s (7 mph), before gently descending as cool autumn air settles in. The winds of September not only provide a welcome relief from the heat of summer but also signal the approach of crisp autumn days, making it a delightful time for outdoor activities amidst evolving landscapes.

Average September Wind Speed in Qazvin

The chart displays monthly wind speed patterns in Qazvin, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.22.12.72.42.62.53.12.52.9 m/s2.62.02.1
Data source: Qazvin September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Qazvin Compares to Other Months

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

September weather in Qazvin is characterized by a warm climate, with temperatures ranging from a minimum of 6°C (43°F) to a scorching maximum of 37°C (99°F), averaging around 22°C (72°F). The month sees minimal precipitation, with only about 3 mm (0.1 in) falling over just one day, and humidity levels at a moderate 58%. In contrast, January experiences much colder temperatures, with a minimum of -14°C (7°F) and a maximum of 14°C (57°F), averaging just 1°C (34°F). This winter month is significantly wetter, receiving about 41 mm (1.6 in) of precipitation over six days, coupled with higher humidity levels at 75%. For more detailed weather information, visit Qazvin weather in January.

In September, the weather is generally warm, with temperatures ranging from a minimum of 6°C (43°F) to a maximum of 37°C (99°F) and an average of 22°C (72°F). The month is characterized by low precipitation, averaging just 3 mm (0.1 in) over approximately one day, and humidity levels around 58%. In contrast, February features much colder conditions, with temperatures fluctuating from a chilling -16°C (3°F) to a more moderate maximum of 17°C (63°F), averaging only 3°C (37°F). This month sees significantly higher precipitation, totaling 78 mm (3.1 in) over nine days, along with increased humidity at 75%. For a detailed look at February weather in Qazvin, you can visit Qazvin weather in February.

In September, the weather in Qazvin is generally warm, with average temperatures around 22°C (72°F) and a maximum of 37°C (99°F), accompanied by relatively low precipitation of just 3 mm (0.1 in) over a single day. The humidity is moderate at 58%, making it a comfortable time to enjoy outdoor activities. In contrast, March brings significantly cooler temperatures, with an average of 8°C (46°F) and minimums dipping to -7°C (20°F). March is also much wetter, experiencing 71 mm (2.8 in) of precipitation spread across 11 days and higher humidity levels at 72%. For more details on the weather in March, you can visit Qazvin weather in March.

September and April present a striking contrast in weather. September typically boasts a warm average temperature of 22°C (72°F), peaking at a high of 37°C (99°F), while experiencing minimal rainfall of just 3 mm over a single day. In contrast, April features a much cooler average temperature of 13°C (55°F), with nightly lows dipping down to -7°C (20°F) and a maximum of 29°C (84°F). April is also marked by significantly higher precipitation, totaling 90 mm over twelve days, contributing to a humidity level of 65%. For more details on the weather during this month, you can check Qazvin weather in April.

When comparing the weather in September to that of May, one can notice distinct differences. September experiences higher average temperatures, ranging from a minimum of 6°C (43°F) to a maximum of 37°C (99°F), while May temperatures are slightly cooler, with a minimum of 4°C (40°F) and a maximum of 34°C (93°F). Additionally, September is much drier, receiving only 3 mm (0.1 in) of precipitation over just 1 day, in stark contrast to May's 48 mm (1.9 in) of rainfall spread over 10 days. Humidity levels are also higher in May at 65%, compared to September's 58%. For more details, you can check Qazvin weather in May.

In comparing the weather of September and June, we see that both months experience warm temperatures, but June tends to be slightly warmer overall. June's average temperature reaches around 24°C (76°F), with maximums peaking at 38°C (100°F), while September has an average of 22°C (72°F) and a maximum of 37°C (99°F). Additionally, June experiences higher humidity at 65% compared to September's 58%. Precipitation is sparse in both months, with June receiving 5 mm (0.2 in) and September only 3 mm (0.1 in), but the number of rainy days remains the same at just one day for each month. For more details, you can check out Qazvin weather in June.

In comparing the weather of September and July, September is characterized by noticeably cooler temperatures, with a minimum of 6°C (43°F) and an average of 22°C (72°F), while July experiences warmer conditions with a minimum of 13°C (56°F) and an average of 27°C (80°F). July also reaches higher maximum temperatures, peaking at 40°C (104°F) compared to September's maximum of 37°C (99°F). Despite both months receiving minimal precipitation, July has slightly higher rainfall at 4 mm (0.1 in) over 1 day, while September records just 3 mm (0.1 in) also over 1 day. The humidity levels are relatively similar, with September at 58% and July at 61%. For a detailed look at July's weather, you can refer to Qazvin weather in July.

In comparing the weather of September and August, September offers a notable drop in minimum temperatures, averaging 6°C (43°F) compared to August's 10°C (51°F). While the average maximum temperature in September is slightly lower at 37°C (99°F) versus August's 38°C (101°F), the overall average temperature in September is 22°C (72°F), which is cooler than August’s 25°C (78°F). Both months see minimal precipitation, with only 3 mm (0.1 in) over 1 day, but September exhibits a higher humidity level at 58% compared to August's 49%. For more information on the weather specifics for August, you can check Qazvin weather in August.

September generally offers warmer weather with average temperatures reaching up to 22°C (72°F) and maximums soaring to 37°C (99°F). This month is characterized by minimal precipitation, with only 3 mm (0.1 in) of rain over just one day, and a relatively moderate humidity level at 58%. In contrast, October experiences a significant drop in temperature, with an average of 15°C (59°F) and highs that reach 31°C (87°F). The month sees a rise in rainfall, accumulating 37 mm (1.5 in) over approximately six days, along with increased humidity at 73%. For more detailed insights, check out Qazvin weather in October.

September weather in Qazvin features warm temperatures, with a minimum of 6°C (43°F) and a maximum reaching up to 37°C (99°F), resulting in an average of 22°C (72°F). The month experiences minimal precipitation, with only 3 mm (0.1 in) over just 1 day, and a humidity level of 58%. In contrast, November brings a significant drop in temperatures, where the minimum can drop to -5°C (23°F) and the average temperature is a much cooler 8°C (46°F). While the maximum still reaches up to 24°C (75°F), November is much wetter, with 53 mm (2.1 in) of precipitation spread over 9 days and increased humidity at 75%. For more details on the weather trends, you can visit Qazvin weather in November.

The weather in September is characterized by warm temperatures, with averages around 22°C (72°F) and peaks reaching up to 37°C (99°F), accompanied by low precipitation of just 3 mm (0.1 in) over the course of only one day. In contrast, December brings a much colder climate, with average temperatures dropping to 3°C (38°F), highs of 17°C (63°F), and lows plunging down to a frigid -13°C (8°F). Additionally, December experiences significantly more precipitation at 54 mm (2.1 in) across about eight days, alongside increased humidity levels at 72%. For a detailed forecast, check out Qazvin weather in December.

Compare Qazvin's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Qazvin

As September arrives in Qazvin, the weather begins to transition into a more moderate and pleasant atmosphere, distinguishing itself from the extremes of the summer heat. With temperatures averaging around 22°C (72°F), the month offers a welcome respite from the sweltering highs experienced in July and August, while still retaining occasional warmth with maximums reaching 37°C (99°F). The low precipitation levels, only about 3 mm (0.1 in) over just a single day, indicate a generally dry month, making it ideal for outdoor activities. The humidity, sitting comfortably at 58%, adds a touch of crispness to the air, making September one of the more enjoyable times to visit. For more insights into what to expect year-round, explore Qazvin Climate.