September Weather in Norwich, United Kingdom

Last updated: March 17, 2025

September in Norwich, United Kingdom offers a delightful mix of late summer warmth and the onset of autumn. With maximum temperatures reaching 26°C (79°F) and an average of 15°C (59°F), the month's pleasant climate invites outdoor exploration. However, be prepared for the occasional drizzle, as 66 mm (2.6 in) of rain falls over 11 days, contributing to the region's lush greenery. Humidity levels hover around 84%, creating a crisp atmosphere that enhances the charm of this historic city. Whether you’re strolling through parks or savoring local cuisine, September in Norwich promises a refreshing experience.

September Temperature in Norwich

In September, Norwich experiences a delightful transition from the warmth of summer to the coolness of autumn. With temperatures ranging from a minimum of 5°C (42°F) to a maximum of 26°C (79°F), the month showcases an average of 15°C (59°F), offering a pleasant climate for outdoor activities. This moderate weather facilitates a vibrant backdrop for fall festivities, as the city begins to don its autumnal hues. Compared to the height of summer, September's evenings become crisper, inviting cozy gatherings and the allure of seasonal changes, while still retaining a touch of warmth during the day.

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

The chart illustrates September temperature patterns in Norwich, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec414345485360636459544743
Data source: Temperature data for Norwich 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 Norwich

September in Norwich brings a moderate average precipitation of 66 mm (2.6 in), experienced over 11 days of rainfall. This month sits comfortably in the transitional period between the dry summer and wetter autumn, showcasing a slight decrease from the 84 mm recorded in August, but still retaining a substantial amount of rain. As the skies begin to cloud more frequently, September's weather hints at the impending increase in rainfall typical of autumn, which reaches its peak in October with 85 mm. Overall, September serves as a reminder of summer's lingering warmth while gradually shifting towards the season of heavier downpours, making it a month of notable change in Norwich’s climate.

September Precipitation Trends in Norwich

The chart displays monthly precipitation patterns in Norwich, 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.
JanFebMarAprMayJunJulAugSepOctNovDec486056325775698466855385
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Norwich

In September, humidity in Norwich sees a slight increase to 84%, a shift that foreshadows the wetter months ahead. As summer fades, this uptick marks a transition from the lower humidity levels of July and August, which recorded 79% and 78% respectively. This seasonal change is a precursor to the higher moisture levels of autumn, as humidity rises again to 88% in October and remains elevated through the winter. Overall, the data reveals a clear trend: while humidity dips during the height of summer, it consistently climbs again as the year progresses, settling at higher percentages in the colder months.

September Average Humidity in Norwich

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

September in Norwich brings a moderate UV Index of 5, signaling a shift from the high summer values seen in July and August. With a burn time of 30 minutes, it’s essential to enjoy the outdoors with a bit of caution, especially as the days begin to shorten. This gradual decline in UV exposure from the peak summer months marks a transition into autumn, inviting residents to take advantage of the pleasant early fall weather while remaining mindful of sun safety. For more detailed information on seasonal trends, check out the Norwich UV Index.

Maximum UV Index Levels in Norwich for September

The chart shows the monthly maximum UV Index (UVI) for Norwich 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.
JanFebMarAprMayJunJulAugSepOctNovDec124578875321
Data source: Norwich 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 Norwich

September in Norwich, United Kingdom, boasts a delightful 318 hours of sunshine, making it one of the sunniest months of the year. As summer transitions into autumn, the city basks in a warm glow that reflects the peak sunshine of May and July, where hours reached 422 and 430, respectively. This solid stretch of sunlight gradually declines into the cooler months, with October trailing at 247 hours before plunging into the gloom of winter. Compared to the depths of winter, where December only sees 112 hours, September stands out as a vibrant close to summer, inviting residents and visitors alike to relish the lingering warmth and light before the days shorten.

Monthly Sunshine Duration in Norwich: September Highlighted

The September sunshine duration represents the total number of hours Norwich 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.
JanFebMarAprMayJunJulAugSepOctNovDec96h154h233h351h422h403h430h399h318h247h159h112h
Data source: Norwich September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Norwich During September

In September, Norwich experiences a 30% chance of sunny weather, a slight uptick from the preceding months of August (29%) and July (37%). This trend highlights that while summer is winding down, there's still a reasonable likelihood for enjoyable sunny days early in autumn. As the year progresses into the cooler months, the chances for sun begin to dwindle, with October seeing a drop to 23% and further decline into the winter months. Thus, September serves as a perfect opportunity to relish those fleeting sunny spells before the clouds of October set in.

Percentage of Sunny Days in September in Norwich

The chart illustrates the percentage of sunny days in Norwich 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 Norwich experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec23%22%31%43%36%31%37%29%30%23%29%17%
Data source: Norwich September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Norwich in September

As summer's warmth gives way to autumn, September in Norwich, United Kingdom, experiences a gentle shift in daylight, offering around 12 hours of sunlight. This marks a gradual decline from the long, sun-soaked days of June and July, when residents enjoyed a peak of 16 hours of daylight. The transition from vibrant summer to the mellow tones of fall is apparent as daylight reduces, moving from the height of summer brightness in May and June down to 10 hours by October. This trend highlights the rhythmic ebb and flow of daylight throughout the year, inviting residents to savor the lingering warmth and beauty of early autumn before the shorter days of winter arrive.

Average Daylight Hours in Norwich for September

The chart illustrates the variation in daylight duration in Norwich throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 13m9h 52m11h 54m13h 59m15h 48m16h 45m16h 14m14h 36m12h 36m10h 33m8h 41m7h 41m
Data source: Norwich daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Norwich

As September unfolds in Norwich, the wind begins to whisper with a gentle average speed of 4.3 m/s (10 mph), marking a subtle shift in the seasonal breeze. This is a notable dip from the summer months, where winds were slightly more spirited, averaging around 4.8 m/s (11 mph) in both June and August. The transition towards autumn is palpable, as wind speeds begin to align more closely with earlier months in the year, hinting at the approaching chill. Interestingly, while September's winds are softer, they pave the way for a notable increase in October, where gusts pick up again to 5.8 m/s (13 mph). This ebb and flow in wind speed reflects the rhythm of the changing seasons in this charming part of the United Kingdom.

Average September Wind Speed in Norwich

The chart displays monthly wind speed patterns in Norwich, 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.
JanFebMarAprMayJunJulAugSepOctNovDec5.65.95.44.64.84.14.24.84.3 m/s5.85.45.6
Data source: Norwich September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Norwich Compares to Other Months

The weather in Norwich 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 Norwich and find detailed weather information for every month.

September and January exhibit strikingly different weather patterns. In September, temperatures range from a minimum of 5°C (42°F) to a comfortable average of 15°C (59°F), peaking at 26°C (79°F). This month sees about 66 mm (2.6 in) of rainfall across 11 days, accompanied by a relatively high humidity of 84%. In contrast, January brings colder conditions, with temperatures falling to a minimum of -3°C (27°F) and averaging just 5°C (41°F), with a maximum of 14°C (57°F). The precipitation is lower at 48 mm (1.9 in) over 10 days, but the humidity is slightly elevated at 89%. For more details, you can check Norwich weather in January.

September and February showcase contrasting weather patterns. September generally enjoys milder temperatures, with a minimum of 5°C (42°F) and an average of 15°C (59°F), peaking at 26°C (79°F). In contrast, February is notably cooler, with temperatures dipping to a minimum of -3°C (27°F) and an average of 6°C (43°F), only reaching a maximum of 15°C (60°F). Both months experience similar precipitation levels, with September receiving 66 mm (2.6 in) over 11 days and February slightly less at 60 mm (2.4 in) over 12 days. The humidity is also quite high in both months, with September at 84% and February at 87%. For more details, you can check Norwich weather in February.

September and March present quite contrasting weather patterns. In September, temperatures range from a minimum of 5°C (42°F) to a pleasant maximum of 26°C (79°F), with an average of 15°C (59°F). The month typically experiences 66 mm (2.6 in) of precipitation over 11 days and maintains high humidity at 84%. In contrast, March sees cooler temperatures, with a range from a chilly -4°C (24°F) to a maximum of 18°C (66°F) and an average temperature of only 7°C (45°F). Precipitation levels are slightly lower at 56 mm (2.2 in), but it occurs more frequently, with rain on about 15 days and humidity slightly higher at 86%. For a deeper insight into how the weather unfolds in March, you can check out this link: Norwich weather in March.

In comparing the weather of September and April, we observe notable differences in temperature and precipitation. September experiences a wider temperature range, with minimums of 5°C and maximums reaching up to 26°C, resulting in a pleasant average of 15°C. In contrast, April has cooler temperatures, with lows around 0°C and highs peaking at 21°C, leading to an average of only 9°C. Furthermore, September sees more precipitation, measuring 66 mm over approximately 11 days, while April has less rainfall at 32 mm and about 7 days of rain. Both months have similar humidity levels, hovering around 84% in September and 85% in April. For more detailed information, you can check Norwich weather in April.

When comparing the weather in September and May, notable differences emerge in temperature and precipitation. September boasts a warmer climate with average temperatures reaching 15°C (59°F) and maximums of 26°C (79°F), while May's average temperature is slightly cooler at 12°C (54°F) with a maximum of 24°C (75°F). In terms of precipitation, September experiences slightly more rainfall at 66 mm (2.6 in) over 11 days compared to May's 57 mm (2.2 in), which also falls on 11 days. Both months have similar humidity levels, with September at 84% and May at 83%. For a more detailed look at May's weather, you can visit Norwich weather in May.

In comparing the weather of September and June, we see some interesting similarities and differences. Both months have a maximum temperature reaching around 26°C (79°F), with September showing a slightly lower minimum temperature of 5°C (42°F), compared to June's 7°C (44°F). The average temperature remains very close at 15°C (59°F) for September and 15°C (60°F) for June. However, June experiences slightly higher precipitation, totaling 75 mm (2.9 in), while September records 66 mm (2.6 in), with both months having precipitation on 11 days. Humidity levels are also comparable, with September at 84% and June at 83%. For more detailed insights, check out Norwich weather in June.

September weather in Norwich tends to be slightly cooler and wetter compared to July. The minimum temperature in September dips to 5°C (42°F), while July's minimum stands at 9°C (48°F). The average temperature is also lower in September at 15°C (59°F), compared to July's 17°C (63°F). However, July experiences slightly warmer maximum temperatures, reaching up to 29°C (85°F), whereas September peaks at 26°C (79°F). Both months have similar levels of precipitation, with September receiving 66 mm (2.6 in) over 11 days and July seeing 69 mm (2.7 in) over 12 days. Humidity is slightly higher in September at 84%, compared to 79% in July. For a more detailed look, you can check Norwich weather in July.

In comparing the weather of September to that of August, we see a distinct shift in temperatures and conditions. September experiences cooler temperatures, with a minimum of 5°C (42°F) and an average of 15°C (59°F), compared to August, which boasts a minimum of 10°C (50°F) and an average of 18°C (64°F). The maximum temperatures also decline, peaking at 26°C (79°F) in September versus 29°C (84°F) in August. Despite the drop in warmth, September sees slightly less precipitation at 66 mm (2.6 in) over 11 days than August's 84 mm (3.3 in) across 14 days. The humidity remains relatively high in both months, with September at 84% and August at 78%. For more details about August weather, you can visit Norwich weather in August.

September and October show distinct shifts in weather patterns. In September, temperatures range from a minimum of 5°C (42°F) to a maximum of 26°C (79°F), with an average of 15°C (59°F) and relatively lower precipitation at 66 mm (2.6 in) over 11 days. This month has a humidity level of 84%. In contrast, October experiences cooler conditions, with temperatures dipping to a minimum of 4°C (40°F) and peaking at 23°C (73°F), resulting in an average temperature of 12°C (54°F). Additionally, this month sees increased precipitation, totaling 85 mm (3.3 in) over 14 days, and slightly higher humidity at 88%. For more detailed insights, you can check the Norwich weather in October.

In September, the weather is generally milder, with temperatures ranging from a minimum of 5°C (42°F) to a maximum of 26°C (79°F) and an average of 15°C (59°F). The month sees a total precipitation of 66 mm (2.6 in) over 11 days, accompanied by relatively high humidity at 84%. In contrast, November experiences much cooler conditions, with temperatures decreasing to a minimum of 1°C (34°F) and averaging around 8°C (47°F), peaking at 17°C (63°F). Although November receives slightly less precipitation at 53 mm (2.1 in) over 12 days, the humidity rises to 89%, making the atmosphere feel quite damp. For more detailed insights on November weather, visit Norwich weather in November.

September and December present quite different weather experiences. In September, temperatures typically range from a minimum of 5°C (42°F) to a maximum of 26°C (79°F), with an average of 15°C (59°F). The month sees around 66 mm (2.6 in) of precipitation over approximately 11 days and a humidity level of 84%. In contrast, December brings colder weather, with temperatures ranging from -1°C (31°F) to a max of 14°C (58°F) and an average of 6°C (43°F). Precipitation increases to 85 mm (3.3 in) over 16 days, while humidity rises slightly to 88%. For more details on Norwich weather specifically in December, you can visit Norwich weather in December.

Compare Norwich's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Norwich

As September arrives in Norwich, the weather begins to transition from the warmth of summer to the cooler embrace of autumn. With an average temperature of 15°C, this month offers a refreshing change, marked by occasional warmer days reaching up to 26°C, contrasting the chill of the evenings when temperatures can dip to around 5°C. The increased humidity at 84%, combined with approximately 66 mm of rainfall over 11 days, creates a vibrant atmosphere for the lush landscapes of the region. This blend of warm and cool, along with the noticeable uptick in precipitation, makes September a unique precursor to the fall, contrasting sharply with the drier, sunnier days of previous months. To explore more about what to expect throughout the year, visit Norwich Climate.