Trondheim in september: average Weather, Temperature and Climate
Weather in Trondheim in september 2025
The weather in Trondheim in the month of september comes from statistical datas on the last years. You can view the weather statistics for the whole month, but also navigating through the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
tolerable weather 0.1cm
Weather at 6am
49°F
Clear/Sunny
28% of time
24%
22%
18%
Weather at 12pm
58°F
Clear/Sunny
29% of time
25%
22%
16%
Weather at 6pm
50°F
Clear/Sunny
25% of time
25%
20%
18%
Weather at 3am
47°F
24%
23%
23%
13%
Evolution of daily average temperature and precipitation in Trondheim in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Trondheim in september.
The climate of Trondheim in september is tolerable
The weather in september in Trondheim is wet (with 4.8in of precipitation over 8 days). The situation is deteriorating compared to the previous month since in august there is an average of 5.2in of precipitation over 8 days.
The climate is quite cold in that locality the month of september, but it is tolerable by dressing cosy. The thermometer averaged maximum of 59°F. On average, the recorded minimum temperature is 49°F. Thus, the mean temperature average on this month of september in Trondheim is 54°F. Note that these seasonal averages are in contrast with those observed in Trondheim in the month of september with a maximum record of 72°F in 2009 and a minimum record of 31°F in 2009. You can plan to have about 6 days with temperatures up to 65°F, or 20% of time.
On this month of september, day length in Trondheim is generally 13:00. The sun rises at 05:43 and sunset is at 18:43.
With proper weather, september is okay (but not good) to go in Trondheim in Norway.
Trondheim: another month?
If you can push the dates of your trip to Trondheim forward, the month of october has a better weather forecast than september. more information
September: another location in Norway?
If you want to go to Norway in september, there are destinations with better weather than Trondheim:
In september, Kristiansand, Sandefjord, Arendal, Drobak, Fredrikstad and Grimstad have good weather.
Seasonal average climate and temperature of Trondheim in september
Check below seasonal norms These datas are compiled from the weather statements of the last years of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 54°F | ||||
| Highest temperature | 59°F | ||||
| Lowest temperature | 49°F | ||||
| Highest record temperature | 72°F (2009) | ||||
| Lowest record temperature | 31°F (2009) | ||||
| Number of days at +65°F | 6 day(s) (20%) | ||||
| Number of days at -32°F | 0 day(s) (0%) | ||||
| Sea temperature | |||||
| Average sea temperature | 57°F | ||||
| Lowest sea temperature | 53°F | ||||
| Highest sea temperature | 61°F | ||||
| Wind | |||||
| Wind speed | 14km/h | ||||
| Wind temperature | 45°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 4.8in | ||||
| Number of days with rainfall | 8 day(s) (25%) | ||||
| Record daily rainfall | 2.1in (2011) | ||||
| Snowfall | 0.1cm | ||||
| Other climate data | |||||
| Humidity | 87% | ||||
| Visibility | 8.82km | ||||
| Cloud cover | 54% | ||||
| UV index | 4 | ||||
| Daily sunshine hours | 11 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 05:43 | ||||
| Time of sunset | 18:43 | ||||
| Length of day | 13:00 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | tolerable | ||||
How was the weather last september?
Here is the day by day recorded weather in Trondheim in september 2024:
47°F to 67°F
41°F to 68°F
50°F to 59°F
52°F to 65°F
58°F to 76°F
56°F to 76°F
56°F to 67°F
50°F to 68°F
50°F to 56°F
47°F to 50°F
41°F to 56°F
47°F to 54°F
40°F to 52°F
40°F to 58°F
47°F to 59°F
47°F to 56°F
49°F to 56°F
52°F to 68°F
52°F to 65°F
50°F to 58°F
47°F to 54°F
43°F to 54°F
45°F to 47°F
41°F to 45°F
40°F to 41°F
36°F to 47°F
40°F to 41°F
36°F to 40°F
36°F to 38°F
32°F to 43°F
Map: other cities in Norway in september
Cities near Trondheim:
| Brekstad in september | tolerable weather |
| Meldal in september | bad weather |
| Levanger in september | tolerable weather |
| Sistranda in september | tolerable weather |
| Steinkjer in september | tolerable weather |
| Aure in september | tolerable weather |
| Steinsdalen in september | tolerable weather |
| Roros in september | very bad weather |
| Sunndalsora in september | tolerable weather |
| Namsos in september | tolerable weather |
| Kristiansund in september | tolerable weather |
| Femundsmarka National Park in september | bad weather |
Click over cities on the map for information about the weather in september.
Trondheim
perfect weather
good
tolerable
bad
very bad
Weather data for Trondheim in september:
Weather data for Trondheim for september are derived from an average of the weather forecast since 2009 in Trondheim. There is a margin of error and these forecasts are to be considered as general information only. The weather in Trondheim can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Trondheim.