Climate averages 1991–2020
Luleå weather
in September.
A cool, moderately wet month: the 4th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a cool month in Luleå: daytime highs average 12.1°C and nights cool to about 8.2°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 59 mm of rain on roughly 9 days, which makes September a moderately wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 12 min on an average September day.
The nearest other city in this atlas is Oulu (167 km away). In September its highs average 12.2°C, about as warm as Luleå, with 56 mm of rain.
Among the 21 cities listed in Sweden, Luleå ranks 21st of 21 for the warmest September highs and joint 14th of 21 for the driest September (rainfall, lowest first). The mean September high of those 21 cities is 15.5°C; Luleå is 3.5°C cooler than that mean.
From September to October, average highs fall by 6.9°C to 5.2°C, and monthly rainfall falls from 59 mm to 56 mm.
The annual picture
September in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Luleå climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -4.9°C-9.6°C | -9.6°C | 41 | 8.9 | 4.85 h |
| February | -5.9°C-10.5°C | -10.5°C | 31 | 7.5 | 8.28 h |
| March | -2.0°C-7.1°C | -7.1°C | 30 | 7.1 | 11.712 h |
| April | 2.8°C-3.0°C | -3.0°C | 30 | 6.4 | 15.215 h |
| May | 9.0°C3.1°C | 3.1°C | 38 | 7.6 | 19.019 h |
| June | 14.2°C9.0°C | 9.0°C | 53 | 8.3 | 22.422 h |
| July | 18.1°C13.5°C | 13.5°C | 60 | 9.9 | 20.721 h |
| August | 16.9°C12.7°C | 12.7°C | 62 | 10.1 | 16.817 h |
| September, selected | 12.1°C8.2°C | 8.2°C | 59 | 9.3 | 13.213 h |
| October | 5.2°C2.1°C | 2.1°C | 56 | 9.6 | 9.710 h |
| November | 0.6°C-2.8°C | -2.8°C | 56 | 11.4 | 6.16 h |
| December | -2.4°C-6.6°C | -6.6°C | 51 | 11.3 | 3.54 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Oulu in SeptemberFinland · 167 kmHigh 12.2°C · Low 7.5°C · 56 mm rain
- Umeå in SeptemberSweden · 215 kmHigh 13.0°C · Low 8.3°C · 62 mm rain
- Kuopio in SeptemberFinland · 401 kmHigh 12.6°C · Low 8.3°C · 65 mm rain
- Jyväskylä in SeptemberFinland · 410 kmHigh 13.2°C · Low 8.1°C · 54 mm rain
- Pori in SeptemberFinland · 457 kmHigh 14.1°C · Low 9.4°C · 62 mm rain
- Tampere in SeptemberFinland · 461 kmHigh 13.5°C · Low 8.8°C · 53 mm rain
- Joensuu in SeptemberFinland · 496 kmHigh 12.4°C · Low 8.8°C · 68 mm rain
- Lahti in SeptemberFinland · 541 kmHigh 14.1°C · Low 8.5°C · 51 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Luleå) is explained once on the Luleå year overview and on the Sources, method and limits page.