Reykjanesbær Weather in September
Average highs run from 12°C on September 1 to 9°C on September 30, and lows from to . Normal precipitation for the month is 147 mm over about 21 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
- 11°C
- Precipitation
- 147 mm
- Record high
- 18°CSep 2, 2008
- Record low
- -5°CSep 28, 1988
- Daylight
- 14 h 32 min to 11 h 27 min
- Cloud cover
- 78%
- Humidity
- 86%
- Dew point
- 6°C
- Wind
- 20.2 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 | 12°C | 15°C 1998 | 3°C 1989 | 68% | |
| Sep 2 | 13°C | 18°C 2008 | 3°C 1970 | 69% | |
| Sep 3 | 13°C | 17°C 1958 | 2°C 1982 | 69% | |
| Sep 4 | 13°C | 16°C 2010 | 1°C 1982 | 70% | |
| Sep 5 | 12°C | 16°C 2016 | 2°C 1992 | 70% | |
| Sep 6 | 12°C | 17°C 2010 | 2°C 1977 | 70% | |
| Sep 7 | 12°C | 18°C 2022 | 1°C 1972 | 68% | |
| Sep 8 | 12°C | 16°C 2003 | 2°C 1985 | 66% | |
| Sep 9 | 11°C | 16°C 2003 | 1°C 1977 | 65% | |
| Sep 10 | 11°C | 18°C 1968 | 2°C 1972 | 64% | |
| Sep 11 | 11°C | 18°C 1968 | 2°C 2024 | 64% | |
| Sep 12 | 11°C | 6°C | 16°C 1981 | 1°C 1956 | 64% |
| Sep 13 | 11°C | 16°C 1993 | -1°C 1997 | 65% | |
| Sep 14 | 11°C | 14°C 2006 | -1°C 1979 | 64% | |
| Sep 15 | 11°C | 13°C 1961 | 1°C 2019 | 65% | |
| Sep 16 | 11°C | 6°C | 14°C 2000 | -1°C 1990 | 65% |
| Sep 17 | 11°C | 15°C 2006 | 0°C 1952 | 65% | |
| Sep 18 | 11°C | 14°C 1958 | 0°C 1997 | 65% | |
| Sep 19 | 11°C | 13°C 1986 | 1°C 1964 | 66% | |
| Sep 20 | 11°C | 16°C 1999 | -1°C 1964 | 66% | |
| Sep 21 | 10°C | 15°C 1999 | 0°C 1985 | 66% | |
| Sep 22 | 10°C | 15°C 1999 | 1°C 2005 | 68% | |
| Sep 23 | 10°C | 13°C 1951 | -1°C 1988 | 68% | |
| Sep 24 | 10°C | 14°C 2000 | -3°C 1974 | 69% | |
| Sep 25 | 10°C | 16°C 2000 | -2°C 2020 | 70% | |
| Sep 26 | 10°C | 17°C 2000 | -1°C 1954 | 70% | |
| Sep 27 | 10°C | 14°C 2019 | 0°C 1994 | 69% | |
| Sep 28 | 10°C | 14°C 2010 | -5°C 1988 | 68% | |
| Sep 29 | 9°C | 15°C 1992 | -1°C 2005 | 68% | |
| Sep 30 | 9°C | 14°C 1958 | -1°C 1969 | 67% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT).
- September 1
- sunrise 6:13 AM, sunset 8:45 PM
- September 30
- sunrise 7:36 AM, sunset 7:03 PM
Other months
Sources
Records: NOAA GHCN-Daily, station ICW00016201, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.