Björlanda Weather in September
Average highs run from 18°C on September 1 to 14°C on September 30, and lows from 12°C to 9°C. Normal precipitation for the month is 90 mm over about 15 wet days.
September day by day
The normal high and low for each date, and the record, in °C.
- Normal low
- Normal high
- Record high
- Record low
September at a glance
- Average high
- 16°C
- Average low
- 10°C
- Precipitation
- 90 mm
- Record high
- 29°CSep 1, 1983
- Record low
- -3°CSep 27, 2002
- Daylight
- 13 h 58 min to 11 h 36 min
- Cloud cover
- 70%
- Humidity
- 85%
- Dew point
- 10°C
- Wind
- 13.7 km/h
Every day of the month
A wet day has at least 1 mm of precipitation in the reanalysis.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Sep 1 | 18°C | 12°C | 29°C 1983 | 3°C 2007 | 52% |
| Sep 2 | 17°C | 12°C | 26°C 1949 | 0°C 2003 | 52% |
| Sep 3 | 17°C | 12°C | 25°C 1947 | 3°C 1989 | 51% |
| Sep 4 | 17°C | 12°C | 27°C 1968 | 2°C 2000 | 50% |
| Sep 5 | 17°C | 12°C | 24°C 1968 | 0°C 2000 | 50% |
| Sep 6 | 17°C | 12°C | 26°C 1949 | 1°C 1984 | 50% |
| Sep 7 | 17°C | 12°C | 27°C 1968 | 2°C 1996 | 50% |
| Sep 8 | 17°C | 11°C | 27°C 1968 | 1°C 1996 | 51% |
| Sep 9 | 17°C | 11°C | 27°C 1968 | 3°C 1990 | 51% |
| Sep 10 | 16°C | 11°C | 25°C 1968 | 1°C 1996 | 51% |
| Sep 11 | 16°C | 11°C | 24°C 1999 | -2°C 1996 | 51% |
| Sep 12 | 16°C | 11°C | 23°C 1969 | 2°C 2000 | 50% |
| Sep 13 | 16°C | 11°C | 23°C 2006 | 1°C 1952 | 50% |
| Sep 14 | 16°C | 11°C | 26°C 1969 | 2°C 1984 | 50% |
| Sep 15 | 16°C | 11°C | 24°C 1969 | 0°C 1996 | 49% |
| Sep 16 | 16°C | 10°C | 26°C 1947 | 0°C 1979 | 47% |
| Sep 17 | 16°C | 10°C | 22°C 1947 | -1°C 2005 | 47% |
| Sep 18 | 15°C | 10°C | 22°C 1960 | 0°C 1986 | 46% |
| Sep 19 | 15°C | 10°C | 23°C 1989 | 0°C 1952 | 46% |
| Sep 20 | 15°C | 10°C | 23°C 1947 | 1°C 1997 | 46% |
| Sep 21 | 15°C | 10°C | 20°C 1944 | -2°C 1996 | 46% |
| Sep 22 | 15°C | 10°C | 24°C 2006 | 1°C 1996 | 45% |
| Sep 23 | 15°C | 10°C | 22°C 2006 | -1°C 1996 | 44% |
| Sep 24 | 15°C | 9°C | 23°C 2006 | 0°C 1996 | 44% |
| Sep 25 | 14°C | 9°C | 25°C 2006 | 0°C 1986 | 44% |
| Sep 26 | 14°C | 9°C | 24°C 2006 | -2°C 1968 | 45% |
| Sep 27 | 14°C | 9°C | 22°C 1965 | -3°C 2002 | 46% |
| Sep 28 | 14°C | 9°C | 18°C 1961 | -3°C 2003 | 46% |
| Sep 29 | 14°C | 9°C | 22°C 2000 | -1°C 2003 | 47% |
| Sep 30 | 14°C | 9°C | 22°C 2000 | -3°C 2003 | 48% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+2).
- September 1
- sunrise 6:13 AM, sunset 8:11 PM
- September 30
- sunrise 7:14 AM, sunset 6:50 PM
Other months
Sources
Records: NOAA GHCN-Daily, station SW000002512, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine, and temperature and precipitation: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.