Gardermoen
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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.

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
*
* Data from: Oslo, Norway (2 KM, 1 Miles).

Gardermoen Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Gardermoen - and find the best time to visit.

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 records 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 2026, 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

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

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 month

What To Do in Gardermoen in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

  • Swimming
    5/10
  • Cycling
    6/10
  • Walking
    6/10
  • Camping
    4/10
  • Outdoor sports
    9/10

Gardermoen 3-Day Forecast

More climate data for Gardermoen

Popular in September

Where to go in September - average daytime high across popular destinations.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.