September Weather in Grantchester, United Kingdom

Last updated: March 17, 2025

In September, the charming village of Grantchester, United Kingdom experiences a delightful range of temperatures, from a warm maximum of 29°C (85°F) to a cooler minimum of 2°C (36°F), resulting in an inviting average of 15°C (59°F). While the month is marked by relatively high humidity levels of 84%, it also brings about 52 mm (2.1 in) of rainfall over 10 days, ensuring the landscape remains lush and vibrant. This unique blend of weather characteristics makes September an enchanting time to explore the picturesque scenery and tranquil riverside strolls that Grantchester offers.

September Temperature in Grantchester

As summer transitions into autumn, September in Grantchester showcases a delightful blend of warmth and coolness. With minimum temperatures averaging 2°C (36°F) and highs reaching up to 29°C (85°F), this month offers a mild climate perfect for outdoor activities. The average temperature hovers around 15°C (59°F), making it a comfortable time for exploring the picturesque countryside or enjoying a peaceful afternoon by the River Cam. This shift from the scorching heat of August, where temperatures peaked at 34°C (94°F), indicates a gradual cooling trend, setting the stage for the crisp days of fall ahead. Overall, September strikes a harmonious balance, inviting both locals and visitors to relish the fading summer warmth before autumn fully takes hold.

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

The chart illustrates September temperature patterns in Grantchester, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec414345495561656459534643
Data source: Temperature data for Grantchester generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Grantchester

In September, Grantchester experiences a moderate level of precipitation, with an average of 52 mm (2.1 inches) spread across approximately 10 days. This marks a slight decrease from the rainier months of August and July, where 70 mm (2.8 in) and 65 mm (2.6 in) were recorded, respectively. As summer transitions into autumn, the shift in weather brings a refreshing change, balancing clear days with the occasional shower. Notably, September’s rainfall continues to set the stage for the wetter months ahead, as the precipitation trend climbs into October, which averages 79 mm (3.1 in). This gradual increase reflects the typical autumn pattern, characterized by heightened moisture levels, ensuring that Grantchester remains lush and vibrant as the seasons change.

September Precipitation Trends in Grantchester

The chart displays monthly precipitation patterns in Grantchester, 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.
JanFebMarAprMayJunJulAugSepOctNovDec504753326669657053794980
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Grantchester

In September, Grantchester experiences a noticeable uptick in humidity, reaching 84%. This marks a shift from the warm summer months of July and August, which saw the lowest levels at 79% and 78%, respectively. As autumn approaches, humidity levels gradually rise again, suggesting that the transition to cooler temperatures brings a touch of moisture back to the air. This increase is a precursor to the higher humidity observed in the following months, particularly as October reverts to 88%, illustrating a seasonal pattern where humidity typically peaks during the late fall and winter months.

September Average Humidity in Grantchester

This chart illustrates the average monthly humidity levels in Grantchester, with September's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how September's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec89%87%86%85%83%83%80%78%84%88%89%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Grantchester

As September rolls into Grantchester, the UV Index takes a noticeable dip, settling at 5, which falls into the moderate exposure category. This marks a shift from the scorching heights of summer, where July and June both sizzled at an index of 8. With a burn time of 30 minutes, it's essential to stay mindful of sun safety, especially during midday. This moderate level suggests a comfortable balance; while it's a relief from the intense summer sun, it's still prudent to apply sunscreen and seek shade during peak hours. The gradual decline in UV exposure from the arid summer months hints at the approaching autumn, making September an ideal time for outdoor activities without the fear of quick sunburn. For a detailed look at UV trends throughout the year, visit Grantchester UV Index.

Maximum UV Index Levels in Grantchester for September

The chart shows the monthly maximum UV Index (UVI) for Grantchester 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.
JanFebMarAprMayJunJulAugSepOctNovDec124578875421
Data source: Grantchester 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 Grantchester

As summer wanes into autumn, September in Grantchester offers a delightful 281 hours of sunshine, marking a gentle transition from the sun-soaked days of July and August. This month, while still basking in the lingering warmth of late summer, sees a notable decline in bright hours compared to the previous months. From the peak of 381 hours in July, September's sunshine heralds the onset of cooler days and shorter nights, aligning with the gradual shift in the yearly cycle. Yet, the sun’s generous offerings still provide ample opportunity for twilight strolls along the picturesque River Cam, making September a uniquely enchanting time in this quaint English village. As nature prepares for the autumn shift, residents and visitors alike can savor the beauty of this shifting season under the embrace of the September sun.

Monthly Sunshine Duration in Grantchester: September Highlighted

The September sunshine duration represents the total number of hours Grantchester 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.
JanFebMarAprMayJunJulAugSepOctNovDec88h143h203h311h378h362h381h350h281h229h136h101h
Data source: Grantchester September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Grantchester During September

In Grantchester, the likelihood of sunny weather in September shows a modest chance of 29%, which is slightly above the summer months but lower than the more promising spring. As the year progresses, September offers a gentle transition from the warmer, sunnier days of summer; however, it can't quite compete with the peak sunshine of April's 46%. Despite September's lingering warmth, the shifting seasons bring a mix of cloudier days and occasional rain, making the chance of sun feel quite variable. Overall, while the sun does make appearances, expect a blend of sunshine and clouds as autumn approaches.

Percentage of Sunny Days in September in Grantchester

The chart illustrates the percentage of sunny days in Grantchester 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 Grantchester experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec22%25%27%47%31%28%39%26%29%21%31%16%
Data source: Grantchester September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Grantchester in September

As September arrives in Grantchester, United Kingdom, the waning summer days bring a shift in daylight duration, settling at 12 hours. This marks a notable decline from the sun-drenched 16 hours experienced in June and July, offering a gentle reminder that autumn is on the horizon. The daylight hours gradually decrease as the month progresses, transitioning from the lingering warmth of summer towards the cooler months ahead. This trend is further reflected in the subsequent drop to 10 hours in October, creating a rhythmic ebb and flow in the natural light that shapes daily life in this picturesque village. As the days shorten, residents embrace the cozy charm of autumn, with its crisp air and changing leaves, punctuated by a reassuring blend of daylight and dusk.

Average Daylight Hours in Grantchester for September

The chart illustrates the variation in daylight duration in Grantchester throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 17m9h 54m11h 54m13h 57m15h 45m16h 41m16h 11m14h 34m12h 36m10h 34m8h 44m7h 45m
Data source: Grantchester daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Grantchester

In Grantchester, United Kingdom, September ushers in a gentle shift in wind conditions, with an average speed of 3.6 m/s (8 mph). This marks a subtle decline from the summer months, reflecting a transitional phase as the warmth begins to fade. Unlike the breezy days of August, September's winds are softer, resonating with the season's impending cozy embrace. Historically, this month sits at the lower end of the wind spectrum compared to the bustling speeds seen earlier in the year; April and May often feature more vigorous gusts. As autumn approaches, the patterns suggest a gradual crescendo towards more lively winds in October, ensuring that while September offers calm, the spirit of change remains palpable.

Average September Wind Speed in Grantchester

The chart displays monthly wind speed patterns in Grantchester, 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.
JanFebMarAprMayJunJulAugSepOctNovDec4.54.94.73.54.33.43.34.13.6 m/s4.94.34.8
Data source: Grantchester September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Grantchester Compares to Other Months

The weather in Grantchester changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of September's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Grantchester and find detailed weather information for every month.

September and January present contrasting weather patterns, reflecting the shift from late summer to winter. In September, temperatures range from a mild 2°C (36°F) at night to a warm 29°C (85°F) during the day, with an average of 15°C (59°F). The month sees about 52 mm (2.1 in) of precipitation over 10 days, accompanied by a relatively high humidity of 84%. In stark contrast, January experiences colder temperatures, with a minimum of -4°C (24°F) and a maximum of 15°C (59°F), averaging just 5°C (41°F). Precipitation is slightly lower at 50 mm (2.0 in) over 9 days, but the humidity is even higher at 89%. For more detailed insights, check out Grantchester weather in January.

September weather is typically warmer than February, with temperatures ranging from a minimum of 2°C (36°F) to a maximum of 29°C (85°F), and an average of 15°C (59°F). The month sees about 52 mm (2.1 in) of precipitation over 10 days, coupled with a humidity level of 84%. In contrast, February experiences cooler temperatures, with a low of -8°C (18°F) and a high of 18°C (65°F), resulting in an average of 6°C (43°F). The precipitation in February is slightly lower at 47 mm (1.8 in) over the same number of days, but the humidity is marginally higher at 87%. For more specific details about February weather, you can check Grantchester weather in February.

September and March present distinctly different weather patterns. In September, temperatures typically range from a mild 2°C (36°F) at night to a warm average of 15°C (59°F) and a maximum of 29°C (85°F) during the day. With around 52 mm (2.1 in) of precipitation spread over 10 days, the humidity is relatively high at 84%. In contrast, March marks a transition into spring, with much cooler temperatures that can dip as low as -6°C (21°F) at night, an average of 7°C (46°F), and a maximum of 22°C (72°F). While March sees slightly higher precipitation at 53 mm (2.1 in) over 13 days, humidity remains comparable at 86%. For more information, check out Grantchester weather in March.

When comparing the weather in September and April, it's evident that September tends to be warmer overall, with average temperatures ranging from a minimum of 2°C (36°F) to a maximum of 29°C (85°F). In contrast, April's temperatures generally fluctuate between a minimum of -2°C (28°F) and a maximum of 27°C (81°F), resulting in a cooler average of 9°C (49°F). Additionally, September experiences slightly more precipitation at 52 mm (2.1 in) over 10 days, compared to April's 32 mm (1.3 in) across 8 days. Both months have high humidity levels, with September at 84% and April at 85%. For a detailed look at April weather specifics, check out Grantchester weather in April.

September and May exhibit relatively similar climates, yet there are notable distinctions between the two months. September boasts a wider temperature range with minimums of 2°C (36°F) and maximums reaching up to 29°C (85°F), providing an overall average of 15°C (59°F). In contrast, May's temperatures are slightly cooler, with a minimum of 1°C (35°F) and a maximum of 27°C (82°F), leading to an average of 13°C (55°F). In terms of precipitation, September receives 52 mm (2.1 in) over approximately 10 days, while May experiences slightly higher rainfall at 66 mm (2.6 in) across 11 days, making both months relatively wet. Humidity levels remain quite similar, at 84% in September and 83% in May, contributing to a generally humid atmosphere. For a detailed look at May weather specifics, you can check the link: Grantchester weather in May.

In comparing the weather of September and June, we see that September experiences a broader temperature range, with a minimum of 2°C (36°F) and a maximum of 29°C (85°F), while June's temperatures range from a minimum of 7°C (44°F) to a maximum of 30°C (87°F). Although both months have relatively similar average temperatures—15°C (59°F) for September and 16°C (62°F) for June—September tends to be slightly cooler overall. Precipitation levels are higher in June, totaling 69 mm (2.7 in) compared to September's 52 mm (2.1 in), with the number of rainy days remaining consistent at 10. Humidity is also comparable, with September at 84% and June slightly lower at 83%. For more detailed weather insights, refer to Grantchester weather in June.

In comparing the weather between September and July, it's evident that July experiences warmer temperatures overall. With average temperatures reaching up to 18°C (65°F) and maximums hitting 36°C (97°F), July is significantly hotter than September, which has an average of 15°C (59°F) and a maximum temperature of 29°C (85°F). Additionally, while July has a higher overall precipitation of 65 mm (2.6 in) over 12 days, September's precipitation totals 52 mm (2.1 in) across 10 days, indicating slightly less rainfall as the summer transitions into autumn. Humidity levels also differ, with September at 84%, suggesting a more humid environment compared to July's 79%. For a more detailed look at July's weather, you can check Grantchester weather in July.

In comparing the weather of September to that of August, September experiences cooler temperatures with a minimum of 2°C (36°F) and an average of 15°C (59°F), while August boasts a warmer minimum of 8°C (47°F) and an average temperature of 18°C (64°F). August also has higher maximum temperatures, reaching up to 34°C (94°F) compared to September's max of 29°C (85°F). Additionally, September tends to be slightly wetter, with 52 mm (2.1 in) of precipitation over 10 days, whereas August has 70 mm (2.8 in) over 12 days, indicating more frequent rainy days. Humidity levels are higher in September at 84%, compared to the 78% average in August. For more details on August weather, you can check Grantchester weather in August.

September typically enjoys milder weather, with temperatures ranging from a minimum of 2°C (36°F) to a maximum of 29°C (85°F), while the average temperature hovers around 15°C (59°F). In contrast, October sees a drop in temperatures, with a minimum of 0°C (33°F) and an average of 12°C (53°F), peaking at 24°C (76°F). Additionally, October experiences more precipitation, accumulating 79 mm (3.1 in) over 12 days, compared to September's 52 mm (2.1 in) over 10 days. Humidity is also slightly higher in October, at 88% compared to September's 84%. For more details on the October weather, you can check Grantchester weather in October.

September and November exhibit distinct differences in weather patterns. September boasts a wider temperature range, with minimums around 2°C (36°F) and maximums reaching 29°C (85°F), resulting in an average of 15°C (59°F). The month experiences 52 mm (2.1 in) of precipitation over about 10 days and maintains a humidity level of 84%. In contrast, November sees cooler temperatures, with a minimum of -2°C (28°F) and a maximum of 17°C (64°F), leading to an average of 8°C (46°F). While precipitation is slightly lower at 49 mm (1.9 in) over the same number of days, the humidity rises to 89%, creating a more damp atmosphere. For more details on the weather during this time, check out Grantchester weather in November.

In September, temperatures range from a mild minimum of 2°C (36°F) to a pleasant average of 15°C (59°F), peaking at a warm 29°C (85°F). The month experiences moderate rainfall, totaling 52 mm (2.1 in) over about 10 days, and humidity levels sit at a comfortable 84%. In contrast, December brings a significant drop in temperature, with minimums dipping to -3°C (27°F) and an average of 6°C (43°F), while the maximum temperature reaches only 15°C (59°F). Rainfall increases to 80 mm (3.2 in) across 15 days, and the humidity rises to 88%. For a more in-depth look at the conditions, check out Grantchester weather in December.

Compare Grantchester's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Grantchester

As September arrives in Grantchester, the weather begins to transition, offering a refreshing mix of warm days and cooler evenings that differ significantly from the sweltering highs of summer. With an average temperature hovering around a comfortable 15°C, it’s the perfect time for outdoor activities, albeit with the likelihood of rain as the month sees about 10 days of precipitation. The humidity remains high at 84%, adding a slight stickiness to the air, but this also nourishes the lush landscapes that define this picturesque village. To explore more about the unique characteristics of Grantchester's weather each month, visit Grantchester Climate.