Gardermoen Weather in September
During September, Gardermoen experiences moderate daytime temperatures of 16°C (61°F) and cooler nights around 7°C (45°F). Expect quite a bit of rainfall. Around 88 mm (3.5 in) is typical.
Rainfall in Gardermoen in September
Analyzing past climate data, one can expect approximately 16 days of rain, averaging 88 mm (3.5 in). A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.
Temperature in Gardermoen in September
Daytime highs in Gardermoen in September reach 16°C (61°F), with nights around 7°C (45°F). Temperatures can feel cooler in the morning and evening, so layering is often the best approach. At 7°C (45°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.
Sunshine in Gardermoen in September
The month experiences a moderate amount of sunlight, with 146 hours of sunshine. This provides a nice balance between sunshine and clouds.
Wind Speed in Gardermoen in September
September sees wind speeds averaging 2 m/s (4 knots). You'll typically experience pleasant light breezes that move leaves slightly and feel refreshing. As an average, expect variation from very calm days to periods with more apparent air movement.
Average water temperature in September
With water at 14°C (57°F), it's on the cooler side. Keen swimmers won't be put off, but those who prefer warm water may find it less enjoyable.If you prefer dry days with pleasant temperatures, June, July and August typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Norway, check out our Gardermoen's climate page.
Gardermoen Temperature in September
Min Temperature
7°C (45°F)
Max Temperature
16°C (61°F)
Water Temperature
14°C (57°F) *
Chance of Rain
54%
Precipitation
88 mm (3.5 in)
Rainy days
16 days
Humidity
76% *
Windspeed
2 m/s (4 knots) *
Sunshine
146 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Gardermoen typically drop from around 17°C (63°F) at the start of September to approximately 13°C (55°F) by the end. Nights are cold, with lows typically ranging from 4°C (39°F) to 9°C (48°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Gardermoen in September
Browse day-by-day weather records for Gardermoen spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Gardermoen historical weather extremes in September
Based on weather observations in Gardermoen between 1976 and 2025, these are the recorded extremes during September.
- The warmest day in September was on September 8, 2021, with a maximum of 26°C (79°F).
- The lowest daytime temperature in September was 6°C (43°F), recorded on September 25, 2013.
- Nighttime temperatures dropped to -6°C (21°F) on September 27, 1986, marking the coldest September night on record.
- The wettest day in September Gardermoen was on September 2, 2015 with 52 mm (2 in) of precipitation.
Best Places in Norway in September
Find out more about the weather in Norway and which places have the best travel conditions in this month. See all of Norway in September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Gardermoen in September
The weather can be unpredictable in September, so pack clothes you can easily mix and match. You could bring jeans, other long pants, and a few t-shirts. A light jacket or light sweater will be pleasant for the cooler moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. The water temperature sits at about 14°C (57°F), which is too chilly for most people to enjoy swimming. Leave the swimsuit at home unless you love cold water. Bring sunglasses since you'll have some sunny periods throughout the monthWhat To Do in Gardermoen in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Norway, check out our Gardermoen's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Gardermoen climate overview or explore weather in Norway.
