Mostar Weather in September
Average highs run from 23°C on September 1 to 18°C on September 30, and lows from 11°C to 7°C. Normal precipitation for the month is 82 mm over about 10 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
- 20°C
- Average low
- 9°C
- Precipitation
- 82 mm
- Record high
- 39°CSep 5, 2026
- Record low
- 7°CSep 30, 2008
- Daylight
- 13 h 11 min to 11 h 47 min
- Cloud cover
- 60%
- Humidity
- 73%
- Dew point
- 8°C
- Wind
- 9.4 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 | 23°C | 11°C | 38°C 2026 | 15°C 2006 | 32% |
| Sep 2 | 22°C | 10°C | 38°C 2026 | 13°C 2010 | 32% |
| Sep 3 | 22°C | 10°C | 38°C 2024 | 12°C 2010 | 32% |
| Sep 4 | 22°C | 10°C | 38°C 2026 | 14°C 2017 | 32% |
| Sep 5 | 22°C | 10°C | 39°C 2026 | 11°C 2007 | 32% |
| Sep 6 | 22°C | 10°C | 38°C 2008 | 9°C 2007 | 32% |
| Sep 7 | 21°C | 10°C | 39°C 2008 | 8°C 2007 | 33% |
| Sep 8 | 21°C | 10°C | 38°C 2008 | 12°C 2007 | 34% |
| Sep 9 | 21°C | 9°C | 36°C 2012 | 12°C 2007 | 34% |
| Sep 10 | 21°C | 9°C | 36°C 2011 | 10°C 2001 | 35% |
| Sep 11 | 21°C | 9°C | 36°C 2011 | 8°C 2001 | 36% |
| Sep 12 | 21°C | 9°C | 37°C 2011 | 10°C 2001 | 36% |
| Sep 13 | 20°C | 9°C | 37°C 2011 | 10°C 2001 | 35% |
| Sep 14 | 20°C | 9°C | 37°C 2011 | 10°C 2001 | 34% |
| Sep 15 | 20°C | 9°C | 37°C 2011 | 11°C 2008 | 34% |
| Sep 16 | 20°C | 9°C | 36°C 2011 | 11°C 2008 | 34% |
| Sep 17 | 20°C | 9°C | 37°C 2015 | 11°C 2002 | 34% |
| Sep 18 | 20°C | 8°C | 34°C 2011 | 10°C 2001 | 34% |
| Sep 19 | 19°C | 8°C | 34°C 2018 | 9°C 2001 | 35% |
| Sep 20 | 19°C | 8°C | 34°C 2026 | 10°C 2001 | 36% |
| Sep 21 | 19°C | 8°C | 33°C 2018 | 11°C 2012 | 36% |
| Sep 22 | 19°C | 8°C | 33°C 2003 | 10°C 2012 | 36% |
| Sep 23 | 19°C | 8°C | 31°C 2003 | 11°C 2008 | 34% |
| Sep 24 | 18°C | 8°C | 31°C 2003 | 8°C 2022 | 34% |
| Sep 25 | 18°C | 8°C | 31°C 2003 | 11°C 2007 | 34% |
| Sep 26 | 18°C | 7°C | 30°C 2021 | 12°C 2004 | 34% |
| Sep 27 | 18°C | 7°C | 32°C 2012 | 10°C 2020 | 34% |
| Sep 28 | 18°C | 7°C | 33°C 2012 | 10°C 2014 | 35% |
| Sep 29 | 18°C | 7°C | 34°C 2012 | 10°C 2001 | 36% |
| Sep 30 | 18°C | 7°C | 33°C 2012 | 7°C 2008 | 38% |
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 7:24 PM
- September 30
- sunrise 6:45 AM, sunset 6:32 PM
Other months
Sources
Records: NOAA GHCN-Daily, station BKM00014648, 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 2026-09-29. Sun and moon: computed with the NOAA solar equations and Meeus.