Last updated: August 27, 2025
In Horten, Norway, September unveils a blend of crisp autumn air and lingering warmth, with maximum temperatures reaching up to 26°C (78°F), while the average hovers around a cool 13°C (56°F). As the month progresses, temperatures can dip to a brisk 1°C (33°F), hinting at the changing season. However, the landscape is often refreshed by significant precipitation, totaling 111 mm (4.4 in) over approximately 13 days, contributing to the region's lush greenery. Humidity levels soar to a high 86%, creating a refreshing yet damp atmosphere that encapsulates the essence of early autumn in this picturesque coastal town.
In September, Horten, Norway, experiences a pleasant transition as summer gives way to autumn. The temperatures range from a chilly minimum of 1°C (33°F) at night to a comfortable maximum of 26°C (78°F) during the day, with an average of 13°C (56°F). This moderate climate signifies a shift with cooler evenings, yet the days still hold onto the warmth of summer, making it an ideal time for outdoor activities. As the month progresses, those crisp mornings hint at the colder months ahead, charting a path towards the notable drop-off seen in October, but for now, September offers a delightful balance that invites exploration of Horten's natural beauty.
September marks a notable shift in Horten, Norway's precipitation patterns, as the town experiences a considerable increase in rainfall. With 111 mm (4.4 in) falling over 13 days, September stands out as the wettest month of the year, surpassing the summer months and setting the stage for a damp autumn. This uptick in precipitation signals a transition from the moderate rains of August, highlighting a trend toward more frequent and intense rainfall as autumn approaches. Compared to the preceding months, the surge in rainfall not only enhances the lushness of the surrounding landscapes but also underscores the growing importance of effective water management in the region as it braces for October, which typically brings even heavier rainfall.
In September, Horten, Norway, experiences a notable shift in humidity, rising to 86% after the relatively drier months of summer. This increase marks a transition from the dryer conditions of June and July, which see humidity levels dip to around 71-72%. The late summer and early autumn months reflect a gentle climb back towards winter's heightened moisture levels, with October and November bringing humidity back up to 92% and 93% respectively. Overall, the trend showcases Horten's characteristic high humidity, particularly pronounced in winter, but also highlights the importance of the September month as a bridge linking the warmth of summer to the crispness of fall, making it an intriguing time in this coastal town.
As September rolls into Horten, Norway, outdoor enthusiasts can expect a moderate UV Index of 4, suggesting a balanced approach to sun exposure. With a recommended burn time of 30 minutes, it's essential to enjoy the beauty of early autumn while staying mindful of UV rays. Interestingly, this month's UV Index is a gradual decline from the peak of 7 in the summer months of June and July, reflecting the natural transition into cooler seasons. Despite this decrease, September still holds a respectable level of UV intensity compared to the winter months ahead, where the index dips to 1 and 2. As the days get shorter and the air crisper, it's the perfect time to soak up some sun safely in beautiful Horten. For more details on UV exposure levels throughout the year, check out Horten UV Index.
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In Horten, Norway, the transition into autumn is marked by a significant drop in sunlight hours. After basking in the warm glow of summer, which boasts nearly 471 hours in July, September still holds onto a respectable 281 hours of sunshine. This is a notable decline, yet it maintains a vibrant connection to the preceding months as the days gradually shorten. Following the peak of summer, the sunlight hours progressively taper off, illustrating the region's dynamic seasonal shifts. As October approaches, Horten yields even more sunlight to the shadows, offering 225 hours of daylight, a stark contrast to the astonishing 454 hours experienced in June. The rhythm of sunlight in Horten not only reflects the dance of the seasons but also invites residents and visitors alike to savor the fleeting warmth of September before winter sets in.
As September rolls into Horten, Norway, the likelihood of enjoying sunny weather takes a noticeable dip, with only 26% chance of sunshine. This trend marks a departure from the relatively brighter months of spring and summer, where chances were notably higher, peaking in April at 57%. The sunny weather slowly dwindles post-August, illustrating the transition into autumn. While the allure of warmer days begins to fade, September still offers a touch of summer's remnants, albeit with a greater chance of clouds creeping in. As such, those planning outdoor activities during this month should prepare for a mix of sun and the potential of overcast skies.
As summer fades into autumn in Horten, Norway, the daylight hours begin to wane significantly following an impressive peak in June. In September, residents enjoy a comfortable average of 12 hours of daylight, a gentle transition from the long, sun-soaked days of summer. This decline marks the start of shorter days, with October bringing in just 10 hours and November dropping to a mere 7 hours. The slow reduction in daylight from August’s 15 hours serves as a reminder of the approaching winter darkness, yet September's balance allows for lingering outdoor activities in the beautiful fall scenery, making it a unique time to appreciate Horten’s natural beauty.
As September unfolds in Horten, Norway, the wind carries a gentle rhythm, with an average speed of 2.7 m/s (6 mph) that mirrors the tranquility of the early autumn. Following the summer's soft breezes, the winds show a slight dip from August’s 2.8 m/s, continuing a trend of gradually decreasing speeds from the peak of April’s 3.2 m/s. This transition signals a shift toward the more brisk conditions of fall, as the average winds begin to pick up again in October, reaching 3.7 m/s (8 mph). Overall, September’s winds reflect a serene calm, providing an ideal backdrop for the stunning autumn hues that start to adorn the landscape.
Weather in Horten varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Horten, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present stark contrasts in weather. In September, temperatures range from a chilly 1°C (33°F) to a warm 26°C (78°F), with an average of 13°C (56°F). This month sees considerable rainfall, with 111 mm (4.4 in) of precipitation over 13 days, accompanied by high humidity levels at 86%. In contrast, January is much colder, with temperatures dipping to a minimum of -17°C (2°F) and an average of -1°C (31°F). It experiences less precipitation at 63 mm (2.5 in) over 9 days, but the humidity is slightly higher at 94%. For more detailed information about January weather, check out Horten weather in January.
In September, the weather is relatively mild, with temperatures ranging from a minimum of 1°C (33°F) to a maximum of 26°C (78°F), averaging around 13°C (56°F). This month experiences higher humidity at 86% and significant rainfall, totaling 111 mm (4.4 in) over approximately 13 days. In contrast, February brings much colder conditions, featuring temperatures that dip from a low of -18°C (0°F) to a high of 11°C (52°F), with an average temperature of -1°C (31°F). Although it has lower precipitation levels of 69 mm (2.7 in) over 11 days, February is characterized by higher humidity at 92%. For more specifics on February weather, visit Horten weather in February.
When comparing the weather in September and March, a stark contrast emerges. September enjoys milder temperatures, ranging from a minimum of 1°C (33°F) to a maximum of 26°C (78°F), with a comfortable average of 13°C (56°F). In contrast, March is much colder, experiencing minimum temperatures as low as -14°C (7°F) and an average of just 2°C (36°F), peaking at 19°C (66°F). Precipitation is more abundant in September, totaling 111 mm (4.4 in) over 13 days, compared to March's 69 mm (2.7 in) over 9 days. Humidity levels are comparable, with September at 86% and March slightly higher at 89%. For more details on the weather in March, you can check Horten weather in March.
September and April present contrasting weather patterns. In September, temperatures range from a chilly 1°C (33°F) at night to a warm 26°C (78°F) during the day, with an average of 13°C (56°F). The month experiences significantly higher precipitation, totaling 111 mm (4.4 in) over 13 days, along with a humidity level of 86%. In contrast, April features cooler temperatures, with a minimum of -8°C (17°F), an average of 6°C (44°F), and a maximum of 23°C (74°F). Precipitation is much lower in April, totaling only 35 mm (1.4 in) over 6 days, accompanied by a humidity of 82%. For more detailed information, you can check Horten weather in April.
In comparing September and May weather, September typically experiences a broader temperature range with lows averaging 1°C (33°F) and highs reaching up to 26°C (78°F), while May starts slightly cooler with a minimum of -1°C (31°F) and can peak at 31°C (88°F). Precipitation is slightly higher in September, averaging 111 mm (4.4 in) over about 13 days, compared to May’s 77 mm (3.0 in) over 11 days. Additionally, September has a higher humidity level at 86%, contrasting with May's more moderate 73%. For a more detailed look at the weather specifics for May, visit Horten weather in May.
In comparing the weather between September and June, we observe a notable shift in temperature and humidity. September experiences a wider range of temperatures, with a minimum of 1°C (33°F) and a maximum of 26°C (78°F), averaging 13°C (56°F). The month is also characterized by higher humidity levels at 86% and more precipitation, totaling 111 mm (4.4 in) over 13 days. In contrast, June features milder temperatures, with a minimum of 5°C (41°F) and a warmer maximum of 31°C (88°F), resulting in an average of 17°C (63°F). Precipitation is lower at 84 mm (3.3 in) across 12 days and the humidity is distinctly less at 71%. For additional insights on June weather, you can explore Horten weather in June.
When comparing the weather in September and July, a few key differences stand out. September experiences cooler temperatures, with minimums around 1°C (33°F) and maximums reaching only 26°C (78°F), in contrast to July's milder range of 8°C (47°F) to 33°C (92°F). Additionally, September sees more precipitation, averaging 111 mm (4.4 inches) over 13 days, compared to July, which has 91 mm (3.6 inches) over 11 days. Humidity levels are also higher in September at 86%, while July enjoys a more comfortable 72%. For a closer look at July's climate, you can refer to Horten weather in July.
In September, the weather takes a cooler turn compared to August, with minimum temperatures dropping to 1°C (33°F) and an average of 13°C (56°F), while August enjoys milder conditions with minimums around 6°C (43°F) and an average of 17°C (62°F). Despite September’s higher maximum temperature of 26°C (78°F) compared to August’s 29°C (84°F), the overall feel is crispier in September. Additionally, September experiences more rainfall with 111 mm (4.4 in) over 13 days, compared to August's 81 mm (3.2 in) over just 12 days, and a noticeable increase in humidity from 77% in August to 86% in September. For a more detailed look at August weather, you can visit Horten weather in August.
In September, temperatures range from a minimum of 1°C (33°F) to a maximum of 26°C (78°F), with an average of 13°C (56°F). The month sees significant rainfall, amounting to 111 mm (4.4 in) over 13 days, and humidity levels are relatively high at 86%.
In contrast, October experiences cooler temperatures, with a minimum of -3°C (27°F) and a maximum of 18°C (64°F), averaging at 8°C (47°F). Rainfall increases slightly to 127 mm (5.0 in), occurring over 14 days, and humidity rises to 92%. The shift from September to October brings not only cooler weather but also higher humidity and precipitation levels. For more detailed information, you can check Horten weather in October.
September and November present a notable contrast in weather conditions. In September, temperatures range from a minimum of 1°C (33°F) to a pleasant maximum of 26°C (78°F), with an average temperature of 13°C (56°F). The month experiences 111 mm (4.4 in) of precipitation over 13 days, and humidity sits at 86%. In stark contrast, November brings colder temperatures, with a minimum of -9°C (16°F), an average of just 3°C (38°F), and a maximum that reaches only 15°C (60°F). Although precipitation is slightly lower at 105 mm (4.1 in) over the same number of rainy days, humidity increases to 93%, making the air feel even colder. For more details on November's weather, you can check Horten weather in November.
In September, temperatures are generally milder, with a minimum of 1°C (33°F) and an average of 13°C (56°F), peaking at a comfortable 26°C (78°F). The month experiences significant rainfall, with 111 mm (4.4 in) falling over 13 days and humidity averaging 86%. In contrast, December brings much colder conditions, with minimum temperatures dropping to -13°C (9°F) and an average of 0°C (32°F), while highs reach only up to 9°C (48°F). Although precipitation is slightly lower at 108 mm (4.3 in), it is spread over more days, totaling 16, and humidity rises to 93%. For a more detailed look at December weather, you can visit Horten weather in December.
As September rolls in, Horten experiences a distinct transition from the warm summer months, marked by a noticeable shift in temperature and humidity. With maximum temperatures reaching around 26°C, the warmth lingers, yet the average dips down to a cooler 13°C, heralding the start of autumn. This month also sees an increase in precipitation compared to the drier summer, with roughly 111 mm falling over 13 days, creating a lush landscape but also a moody atmosphere. The elevated humidity, sitting at 86%, adds to the crispness in the air, making each day feel refreshing and invigorating. To explore more about how September weather fits into the overall climate pattern, visit Horten Climate.