Last updated: August 27, 2025
In September, Fredrikstad, Norway experiences a beautiful transition into autumn, with temperatures ranging from a comfortable maximum of 24°C (76°F) to a crisp minimum of 0°C (33°F). The average temperature hovers around 13°C (56°F), providing a refreshing climate ideal for outdoor activities. However, the month also brings 101 mm (4.0 in) of precipitation over 11 days, contributing to the lush scenery. The humidity level is notably high at 86%, adding to the refreshing, brisk air that characterizes this picturesque time of year in Fredrikstad.
As September unfolds in Fredrikstad, Norway, the summer warmth begins to wane, gracefully ushering in the autumn chill. The temperatures show a pleasant range, with lows around 0°C (33°F) and averages reaching 13°C (56°F), while the daytime can still surprise with highs of up to 24°C (76°F). This transitional month marks a noticeable shift from the height of summer, where July and August hovered around their peaks, to more temperate days. With the crisp air and lingering sunlight, September serves as a perfect backdrop for enjoying the vibrant fall foliage, making it a delightful time to experience the natural beauty of this charming Norwegian town.
In September, Fredrikstad experiences a notable uptick in precipitation, with 101 mm (4.0 in) of rain falling over approximately 11 days. This increase marks a significant shift from the drier summer months, as the city transitions into the wetter autumn season. While August typically sees about 86 mm (3.4 in) of rainfall, September often brings a refreshing dose of moisture, paving the way for lush landscapes and vibrant fall colors. As the days grow shorter and temperatures dip, the consistent rains contribute to the overall trend of increasing precipitation leading into October, which averages 117 mm (4.6 in). This pattern highlights the dynamic weather shifts characteristic of Fredrikstad as summer fades and autumn takes hold.
As summer fades and autumn makes its entrance, September in Fredrikstad, Norway, sees a noticeable uptick in humidity, reaching 86%. This increase is part of a general trend where humidity levels tend to rise as the months shift from the warmth of summer to the cooler embrace of fall. After dipping to 71% in June and experiencing a mild escalation through the summer months, September's humidity marks a transition point, paving the way for the wetter months ahead. With October and November hovering around 92% and 93% respectively, it's clear that Fredrikstad tends to embrace a more humid atmosphere as the year progresses towards winter, enveloping the region in a damp but cozy ambiance.
As September arrives in Fredrikstad, Norway, the UV Index settles at a moderate level of 4, reflecting a shift from the high summer peaks. With a burn time of 30 minutes, it’s essential to remain cautious during outdoor activities, particularly during midday hours when the sun's rays are strongest. This month typically marks the transition into autumn, as daylight wanes and temperatures drop; however, UV exposure can still be significant. Comparatively, while June and July boast a high UV Index of 7, September's index is a reminder that sun safety should remain a priority. For more detailed insights, check out the full Fredrikstad UV Index for the month.
UV Risk Categories
As summer fades into autumn, September in Fredrikstad, Norway, offers a delightful balance of sunshine, with 290 hours of bright light gracing the city. Following the sunshine peaks of June and July, which basked in 464 and 475 hours respectively, September's warmth still lingers, though notably less than the vibrant summer months. The gradual decline in sunlight is a gentle reminder of the approaching winter, yet it still exceeds the earlier months of the year. With each passing week, the hours of daylight dwindle, transitioning from the lively sunlight of summer to the more subdued glow of autumn, but September remains a charming interlude, where the golden hues of fall begin to paint the landscape.
As September rolls in, Fredrikstad, Norway experiences a notable dip in the likelihood of sunny weather, with only 27% chance of sunshine. This marks a decline from the sunnier days of April, which enjoys a 55% probability, and highlights a trend where the summer months gradually yield to the cooler, cloudier autumn. While July and August hold onto a respectable 45% and 41%, respectively, the transition into September signifies a shift towards the wetter half of the year. Observing these changes, it's clear that by the time September arrives, residents should prepare for more overcast skies, making sunny interludes a delightful surprise amid the encroaching autumn chill.
As summer fades, September in Fredrikstad, Norway, brings a noticeable transition in daylight duration. After basking in nearly 18 hours of sunlight in June, the days begin to shorten, settling at a comfortable 12 hours by the end of the month. This gradual decline signifies the shift from the vibrant energy of summer nights to the more subdued tone of autumn. Comparatively, September offers more sunlight than the winter months, where daylight dips to just 6 hours in January and December. This trend highlights how September serves as a bridge, blending the lingering warmth of summer with the crisp beginnings of fall, making it a captivating time for both residents and visitors alike.
In September, Fredrikstad experiences a gentle breeze, with an average wind speed of 3.5 m/s (8 mph). This marks a slight uptick from the languid summer months of July and August, where the winds softened to 3.1 m/s and 3.3 m/s, respectively. As autumn approaches, the winds begin to pick up, signaling a transition towards the briskness of October, which boasts a significant increase to 4.7 m/s (11 mph). Overall, the September winds provide a refreshing prelude to the dynamic shifts of the coming months, inviting both locals and visitors to enjoy the picturesque landscapes that Fredrikstad has to offer.
Weather in Fredrikstad varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Fredrikstad, focusing on differences in temperature, rainfall, humidity, and UV levels.
September weather is generally milder, with temperatures ranging from a minimum of 0°C (33°F) to a maximum of 24°C (76°F), while January experiences much colder conditions, with temperatures dipping as low as -15°C (5°F) and averaging around 1°C (34°F). In September, there's a higher amount of rainfall, totaling 101 mm (4.0 in) over 11 days, compared to January's 54 mm (2.1 in) over 9 days. Additionally, September's humidity is slightly lower at 86%, whereas January reaches a higher humidity level of 94%. For more specific information about January weather, check out Fredrikstad weather in January.
September and February present contrasting weather patterns. In September, temperatures range from a minimum of 0°C (33°F) to a maximum of 24°C (76°F), with an average of 13°C (56°F). This month experiences more precipitation, totaling 101 mm (4.0 in) over about 11 days, alongside relatively high humidity at 86%. In stark contrast, February's cold temperatures range from a minimum of -16°C (4°F) up to a maximum of 12°C (54°F), averaging around 0°C (33°F). Precipitation in February is lighter, at 59 mm (2.3 in), spread across 10 days, while humidity is slightly higher at 92%. For a detailed look at February weather, check out Fredrikstad weather in February.
September and March present significantly different weather characteristics. In September, temperatures range from a chilly 0°C (33°F) at night to a pleasant 24°C (76°F) during the day, with an average of 13°C (56°F). The month sees relatively high humidity at 86% and experiences 101 mm (4.0 in) of precipitation over 11 days. In contrast, March is much colder, with nighttime lows plunging to -13°C (9°F) and daytime highs reaching 16°C (60°F), resulting in a much lower average temperature of 3°C (37°F). Although March has less total precipitation at 59 mm (2.3 in) over 9 days, the humidity remains high at 89%. For a detailed look at the weather in March, you can check Fredrikstad weather in March.
September typically offers milder temperatures compared to April, with averages around 13°C (56°F) compared to April's cooler average of 7°C (45°F). While September can reach a maximum of 24°C (76°F), April's highest temperature peaks at 22°C (71°F). Additionally, September experiences more precipitation, with 101 mm (4.0 in) spread over 11 days, in contrast to April's lighter rainfall of 31 mm (1.2 in) over just 6 days. Both months have high humidity, but September is slightly more humid at 86% compared to April's 82%. For a more detailed look at April's weather, check out Fredrikstad weather in April.
When comparing the weather in September and May, we find distinct differences in temperature and precipitation patterns. September sees a temperature range from a chilly 0°C (33°F) to a pleasant maximum of 24°C (76°F), with an average of 13°C (56°F) and relatively high humidity at 86%. The month experiences a notable amount of rainfall, totaling 101 mm (4.0 in) over 11 days. In contrast, May boasts warmer conditions, with temperatures ranging from 0°C (32°F) to a maximum of 31°C (88°F) and an average of 12°C (53°F). This month tends to be drier, receiving 68 mm (2.7 in) of precipitation, also over 11 days, but with lower humidity at 73%. For a detailed look at the weather specifics, you can check Fredrikstad weather in May.
In comparing the weather between September and June, we see notable differences in both temperature and humidity. September experiences cooler temperatures, with a minimum of 0°C (33°F) and an average of 13°C (56°F), while June offers milder conditions, starting from a minimum of 5°C (42°F) and peaking at an average of 17°C (63°F). Additionally, June can reach higher maximums of 30°C (87°F), contributing to a warmer overall feel. Precipitation in September is also higher, with 101 mm (4.0 in) over 11 days, compared to June's 74 mm (2.9 in) spread over 12 days. The humidity in September is significantly higher at 86%, compared to June's more comfortable 71%. For more detailed insights into June, you can visit Fredrikstad weather in June.
In comparing the weather of September and July, we notice some significant differences. September features cooler temperatures, with a minimum of 0°C (33°F) and an average of 13°C (56°F), compared to July’s warmer minimum of 8°C (47°F) and average of 18°C (65°F). July can reach highs of 33°C (92°F), while September's maximum only goes up to 24°C (76°F). Additionally, September experiences more precipitation, totaling 101 mm (4.0 in) over 11 days, slightly higher than July's 88 mm (3.5 in) over the same number of days. Humidity is also greater in September at 86%, compared to July's 72%. For a closer look at July's climate specifics, check out Fredrikstad weather in July.
In comparing the weather between August and September, we see a notable shift. August boasts warmer temperatures with a minimum of 6°C (43°F), an average of 17°C (62°F), and a maximum reaching up to 29°C (84°F). In contrast, September experiences cooler conditions, starting with a minimum of 0°C (33°F) and an average temperature of 13°C (56°F), peaking at 24°C (76°F). Additionally, August has slightly less precipitation at 86 mm (3.4 in) over 14 days, while September sees an increase to 101 mm (4.0 in) across 11 days, paired with higher humidity at 86%. Overall, September marks a transition towards autumn, while August retains the warmth of summer. For more detailed information about weather patterns in August, check Fredrikstad weather in August.
In September, temperatures in Fredrikstad range from a minimum of 0°C (33°F) to a maximum of 24°C (76°F), with an average of 13°C (56°F). The month sees moderate precipitation of 101 mm (4.0 in) over about 11 days and maintains a high humidity level of 86%. In contrast, October brings cooler conditions, with temperatures dipping to a minimum of -4°C (26°F) and averaging 9°C (48°F), peaking at 18°C (64°F). The month experiences slightly higher precipitation at 117 mm (4.6 in) over 14 days, alongside increased humidity at 92%. For a detailed outlook, check Fredrikstad weather in October.
September in Fredrikstad typically showcases a milder climate, with temperatures ranging from a minimum of 0°C (33°F) to a maximum of 24°C (76°F), resulting in an average of 13°C (56°F). The month experiences significant rainfall as well, with 101 mm (4.0 in) of precipitation spread over 11 days and humidity levels at 86%. In contrast, November brings a notable chill, as temperatures drop with a minimum of -9°C (16°F) and an average of just 4°C (40°F). While November's maximum temperature reaches 15°C (60°F), it also experiences slightly less rainfall at 88 mm (3.5 in) across 13 days, with humidity slightly higher at 93%. This shift from the relatively warmer and wetter September to the colder and drier conditions of November marks a significant transition into winter. For more details on November weather, visit Fredrikstad weather in November.
In September, the weather is noticeably milder, with average temperatures ranging from a minimum of 0°C (33°F) to a maximum of 24°C (76°F), and an overall average of 13°C (56°F). The month experiences around 101 mm (4.0 in) of precipitation over approximately 11 days, coupled with a humidity level of 86%. By contrast, December sees a significant drop in temperatures, with an average of just 1°C (34°F), and a maximum of 10°C (51°F), while reaching as low as -13°C (10°F). The precipitation levels are slightly lower, at 87 mm (3.4 in), but spread over more days, totaling around 15 days, resulting in a higher humidity of 93%. For more details on December weather, visit Fredrikstad weather in December.
As September unfolds in Fredrikstad, the weather experiences a noticeable transition from the summer warmth, with temperatures averaging a cool 13°C (56°F) and maximums reaching up to 24°C (76°F). This month brings higher humidity levels at 86%, contributing to a brisk feel on those crisp early mornings and evenings. With approximately 11 days of precipitation totaling 101 mm (4.0 inches), rainfall becomes more frequent, marking a shift toward the wetter months ahead. Overall, September serves as a bridge, melding the lingering warmth of summer with the refreshing chill of autumn. For a deeper exploration of what to expect throughout the year, visit Fredrikstad Climate.