Climate averages 1991–2020
Drammen weather
in September.
A mild, wet month: the 4th warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a mild month in Drammen: daytime highs average 15.8°C and nights cool to about 9.7°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 94 mm of rain on roughly 11 days, which makes September a wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 57 min on an average September day.
The nearest other city in this atlas is Oslo (36 km away). In September its highs average 15.5°C, about as warm as Drammen, with 89 mm of rain.
Among the 8 cities listed in Norway, Drammen ranks 1st of 8 for the warmest September highs and 4th of 8 for the driest September (rainfall, lowest first). The mean September high of those 8 cities is 15.0°C; Drammen is 0.8°C warmer than that mean.
From September to October, average highs fall by 6.4°C to 9.4°C, and monthly rainfall rises from 94 mm to 98 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
Drammen climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -1.7°C-6.7°C | -6.7°C | 78 | 11.5 | 6.97 h |
| February | 0.2°C-5.9°C | -5.9°C | 53 | 8.5 | 9.19 h |
| March | 4.5°C-3.2°C | -3.2°C | 57 | 8.3 | 11.812 h |
| April | 9.8°C0.9°C | 0.9°C | 56 | 9.0 | 14.514 h |
| May | 15.7°C6.3°C | 6.3°C | 76 | 11.0 | 17.117 h |
| June | 19.4°C10.9°C | 10.9°C | 91 | 12.0 | 18.619 h |
| July | 21.6°C13.9°C | 13.9°C | 101 | 12.4 | 17.918 h |
| August | 20.3°C13.3°C | 13.3°C | 104 | 13.3 | 15.616 h |
| September, selected | 15.8°C9.7°C | 9.7°C | 94 | 10.7 | 12.913 h |
| October | 9.4°C4.8°C | 4.8°C | 98 | 11.8 | 10.210 h |
| November | 4.1°C0.5°C | 0.5°C | 95 | 12.4 | 7.78 h |
| December | -0.3°C-4.9°C | -4.9°C | 74 | 11.3 | 6.16 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
- Oslo in SeptemberNorway · 36 kmHigh 15.5°C · Low 9.5°C · 89 mm rain
- Lillestrøm in SeptemberNorway · 53 kmHigh 15.0°C · Low 8.6°C · 81 mm rain
- Fredrikstad in SeptemberNorway · 71 kmHigh 15.6°C · Low 10.6°C · 81 mm rain
- Kristiansand in SeptemberNorway · 218 kmHigh 15.4°C · Low 10.7°C · 127 mm rain
- Gothenburg in SeptemberSweden · 248 kmHigh 16.2°C · Low 10.6°C · 93 mm rain
- Stavanger in SeptemberNorway · 268 kmHigh 14.4°C · Low 10.7°C · 201 mm rain
- Borås in SeptemberSweden · 275 kmHigh 15.5°C · Low 9.7°C · 83 mm rain
- Bergen in SeptemberNorway · 280 kmHigh 14.2°C · Low 9.1°C · 249 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 Drammen) is explained once on the Drammen year overview and on the Sources, method and limits page.