Last updated: August 27, 2025
In Frogner, Norway, September brings a delightful blend of mild temperatures and notable precipitation, making it a unique month to experience. With a maximum temperature reaching 25°C (78°F) and an average of 12°C (53°F), the weather is generally comfortable, though temperatures can drop to a brisk 0°C (33°F) at night. The month witnesses around 97 mm (3.8 in) of rain spread over 12 days, contributing to the lush, vibrant scenery typical of this region. Coupled with a high humidity level of 86%, September in Frogner invites visitors to enjoy the beautiful landscapes, albeit with an umbrella in hand for those occasional showers.
In Frogner, Norway, September marks a beautiful transition into the autumn season, with temperatures starting to cool down after the warmth of summer. The month begins with minimal temperatures around 0°C (33°F), gradually giving way to an average of 12°C (53°F) and peaking at a delightful 25°C (78°F) on warmer days. This moderate climate invites outdoor exploration, contrasting sharply with the severe cold seen in January and February. As the month progresses, the temperatures reflect a gentle decline, hinting at the brisk chill of October ahead. This shift not only underscores the changing seasons but also provides a perfect backdrop for enjoying the stunning autumn foliage that characterizes the region.
In September, Frogner experiences a notable increase in precipitation, with 97 mm (3.8 in) of rain falling across 12 days. This trend marks a continuation of the wet summer months, where August recorded 90 mm and July peaked at 99 mm. As the region transitions into autumn, the steady rainfall hints at the impending wetter conditions of October, which typically sees an even higher average of 118 mm. The consistency in rainy days throughout the summer and into early autumn demonstrates Frogner's characteristic climate, painting a picture of a lush and vibrant landscape thriving under the embrace of frequent showers.
As summer transitions to autumn, September in Frogner, Norway, experiences a noticeable rise in humidity, hitting 86%. This increase is somewhat expected, following the warmer months of July and August, which saw humidity levels at 72% and 77%, respectively. The shift signals the onset of fall, as the humidity rises again, reminiscent of the high levels in the winter months. This trend highlights a seasonal rhythm where drier summer days yield to the moister air characteristic of the coming autumn and winter. As temperatures begin to cool, the September humidity serves as a gentle reminder of the lush, refreshing feel that will dominate Frogner’s climate in the months ahead.
In September, Frogner, Norway experiences a moderate UV Index of 4, indicating that while sun exposure can be enjoyed, precautions are still advisable. With a burn time of approximately 30 minutes, it's important to be mindful of the sun's intensity as it begins to decrease from the high levels seen during the summer months, specifically in June and July when the UV Index peaked at 7. This transition marks a shift to milder conditions, allowing for comfortable outdoor activities while still requiring some sun safety awareness. As autumn approaches, the UV Index will continue to decline, with lower levels predicted for the coming months. For a detailed look at UV exposure trends throughout the year, check out the comprehensive guide at Frogner UV Index.
UV Risk Categories
As September arrives in Frogner, Norway, the sun graces the skies with a respectable 267 hours of sunshine, marking a gentle decline from the dazzling heights of summer. Following the height of 466 hours in July, the sun's embrace gradually softens, leading to the colorful transitions of autumn. The month showcases a significant drop from August's 390 hours, but still offers a warm glow as nature begins its shift. Interestingly, the sunshine hours in September are a stark contrast to the dimmer days of the upcoming colder months, particularly the 127 hours expected in November. This sunny yet dwindling period not only invites outdoor exploration but also ignites a nostalgic appreciation for the vibrant summer before the frosty grip of winter takes hold.
As summer wanes, the likelihood of sunny weather in September in Frogner, Norway drops to a modest 26%. This marks a decline from the peak sunny days typically enjoyed in the spring and summer months. While April sees a more promising 55% chance of sunshine, the following months often reflect the gradual retreat of warmth and brightness. After a typical August with a 33% chance, September's forecast hints at the encroaching autumn gloom, making it one of the less favorable months for sun-seekers. Embracing the crisp air and changing leaves, however, can bring its own unique charm to this transitional time of year.
As summer fades into autumn in Frogner, Norway, September brings a notable shift in daylight hours, offering around 12 hours of sunlight. This marks a gradual descent from the vibrant 18 hours enjoyed in June, with days noticeably shortening as the year progresses. Following the peak summer months, September serves as a transitional period, where the golden hues of early fall begin to illuminate the landscape with a softer, yet still generous, daylight. The month sets the stage for October's decline to 10 hours, rooting the community in a seasonal rhythm that reflects the changing natural world, while the warmth of prolonged daylight gently lingers just a bit longer.
As September unfolds in Frogner, Norway, the average wind speed settles at 2.6 m/s (6 mph), mirroring the gentle breezes of the late summer months. Following a slight lull in the summer, where July and August recorded the lowest speeds, the winds begin to pick up again as autumn approaches. October prepares to sweep in with a notable increase to 3.5 m/s (8 mph), suggesting a transition to the crisp, invigorating gusts typical of the fall season. Overall, September stands as a bridge, maintaining a calm yet steady wind that hints at the more dynamic weather patterns just around the corner.
Weather in Frogner varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Frogner, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January showcase strikingly different weather patterns. In September, temperatures range from a mild 0°C (33°F) at night, peaking at a pleasant 25°C (78°F) during the day, with an average temperature of 12°C (53°F). The month receives about 97 mm (3.8 in) of rainfall over approximately 12 days, and humidity is relatively high at 86%. In sharp contrast, January experiences much colder temperatures, with a minimum of -18°C (1°F) and a maximum of 10°C (50°F), averaging around -2°C (28°F). Precipitation decreases to 55 mm (2.2 in) over 8 days, while humidity rises slightly to 94%. For more insights on January weather, you can refer to Frogner weather in January.
September and February present contrasting weather patterns. In September, temperatures typically range from a minimum of 0°C (33°F) to a maximum of 25°C (78°F), with an average of 12°C (53°F), accompanied by 97 mm (3.8 in) of precipitation over about 12 days. The air is quite humid, sitting at around 86%. On the other hand, February sees much colder temperatures, with a minimum of -20°C (-4°F) and a maximum of 11°C (51°F), averaging -2°C (28°F). Precipitation during this month is lower at 59 mm (2.3 in), spread across approximately 10 days, and the humidity increases to 92%. For more detailed weather information, you can check Frogner weather in February.
In contrast to the mild temperatures of September, which range from a chilly 0°C (33°F) to a pleasant max of 25°C (78°F), March presents a much colder climate. With temperatures dipping as low as -17°C (1°F) and averaging just 1°C (34°F), March can feel particularly brisk. Additionally, while September experiences a fair amount of precipitation at 97 mm (3.8 in) over 12 days, March has less rain at 60 mm (2.3 in) over 9 days. Notably, the humidity remains quite high in both months, with September at 86% and March slightly higher at 89%. For more detailed insights into March's weather, you can check Frogner weather in March.
When comparing the weather in September and April, we see a noticeable contrast. September boasts a milder average temperature of 12°C (53°F) with maximums reaching 25°C (78°F), while April has a cooler average of 5°C (42°F) and a max of 23°C (74°F). Precipitation is more frequent in September, with 97 mm (3.8 in) spread over 12 days, compared to April’s lighter 37 mm (1.4 in) over just 6 days. Humidity levels are slightly higher in September at 86%, while April maintains a comfortable 82%. For a more detailed look at April's weather, visit Frogner weather in April.
In September, the weather features a wider temperature range, with minimums around 0°C (33°F) and maximums reaching 25°C (78°F), resulting in an average of 12°C (53°F). This month also experiences higher humidity at 86% and a total of 97 mm (3.8 in) of precipitation over 12 days. In contrast, May presents slightly cooler conditions, featuring minimum temperatures of -3°C (27°F) and a maximum of 29°C (85°F), with an average temperature of 11°C (51°F). This month is characterized by lower humidity at 73% and less rainfall totaling 85 mm (3.3 in), also spread over 12 days. For more details, you can check Frogner weather in May.
When comparing the weather in September and June, notable differences emerge. September experiences cooler temperatures, with an average of 12°C (53°F) and a maximum of 25°C (78°F), while June boasts warmer conditions, averaging 16°C (61°F) and peaking at 30°C (85°F). Precipitation levels are relatively close, with September receiving 97 mm (3.8 in) over 12 days and June recording 82 mm (3.2 in) across the same number of days. Moreover, September's humidity is higher at 86%, compared to June's 71%, contributing to a different overall feel in the air. For a detailed view of June's weather, check out Frogner weather in June.
In comparing the weather between September and July, we can clearly see notable differences. September tends to be cooler, with average temperatures ranging from a minimum of 0°C (33°F) to a maximum of 25°C (78°F), while July offers warmer conditions, with temperatures ranging from a minimum of 5°C (41°F) to a maximum of 32°C (91°F). July also sees slightly less precipitation than September, with 99 mm (3.9 in) over 11 days compared to September's 97 mm (3.8 in) across 12 days. Additionally, September experiences higher humidity levels at 86%, compared to July's more moderate 72%. For more details on the July climate, you can visit Frogner weather in July.
In comparing the weather of September and August, September experiences cooler temperatures, with a minimum of 0°C (33°F) and an average of 12°C (53°F), while August has a warmer minimum of 5°C (40°F) and an average temperature of 16°C (60°F). Maximum temperatures also drop in September to 25°C (78°F) compared to August's peak of 29°C (84°F). Precipitation remains relatively similar, with September recording 97 mm (3.8 in) over 12 days and August slightly lower at 90 mm (3.6 in) over the same number of days. Additionally, September's humidity is higher at 86%, compared to August's 77%. For more details on August weather, you can check Frogner weather in August.
September and October present a notable shift in weather patterns. In September, temperatures range from a minimum of 0°C (33°F) to a maximum of 25°C (78°F), with an average temperature of 12°C (53°F). The month experiences a relatively high humidity level of 86% and sees about 97 mm (3.8 in) of precipitation over 12 days.
In contrast, October brings cooler conditions, with temperatures dipping to a minimum of -5°C (23°F) and a maximum of 17°C (64°F), averaging around 7°C (44°F). Rainfall increases slightly to 118 mm (4.6 in) across 14 days, while humidity rises to 92%. This transition signifies a move towards the more brisk and damp conditions typical of late autumn. For more details on specific weather patterns, you can check Frogner weather in October.
The weather in September is generally milder than in November, with average temperatures hovering around 12°C (53°F) and highs reaching up to 25°C (78°F). In contrast, November experiences a significant drop in temperatures, with averages around 2°C (36°F) and maximums of 14°C (58°F), making it feel much colder. Both months see similar levels of precipitation, with September receiving 97 mm (3.8 in) and November slightly higher at 101 mm (4.0 in), although the increased humidity in November, reaching 93%, adds to the chill in the air. For more detailed insights on what to expect weather-wise in this period, check out the information available at Frogner weather in November.
September and December present starkly different weather conditions. In September, temperatures range from a minimum of 0°C (33°F) to a comfortable maximum of 25°C (78°F), with an average of 12°C (53°F). The month experiences 97 mm (3.8 in) of precipitation spread over 12 days, and humidity averages around 86%. In contrast, December is much colder, with temperatures dipping as low as -14°C (7°F) and peaking at 7°C (46°F), averaging -2°C (29°F). This month also sees a similar total precipitation of 97 mm (3.8 in), but over 15 days, while humidity rises slightly to 93%. For a detailed look at December weather conditions in the area, you can explore Frogner weather in December.
As summer fades, September in Frogner ushers in a shift in atmosphere characterized by cooler temperatures and a noticeable increase in humidity. With average highs reaching a mild 12°C and the potential for brisk mornings dropping to around 0°C, this month serves as a gentle reminder of the approaching autumn. Precipitation is also a common theme in September, with the region experiencing an average of 12 rainy days, contributing to a total of 97 mm of rainfall. This combination of cooler temperatures and higher humidity sets September apart from both the warmer summer months and the chillier fall months ahead. For those looking to prepare for the unique climate of this season, additional details can be found at Frogner Climate.