September is one of the warmer months of the year in Qal‘at Bīshah, with average highs near 36.7°C and lows around 21.7°C (mean 29.2°C). It is about average for rainfall, averaging 1 mm of rainfall and 19% relative humidity across the period.
September is one of the warmer months of the year in Qal‘at Bīshah. Across 45 years of records, the warmest September in Qal‘at Bīshah was 2023 — when the month averaged 30.9°C — while the coldest was 1986 at 27.4°C. Typical September days reach 36.7°C with nights near 21.7°C. The long-term trend is warming, about 0.5°C per decade.
September is about average for rainfall in Qal‘at Bīshah, averaging 1 mm of rainfall. The wettest September on record was 1986 with 29 mm, while the driest were 2017, 2018 and 2019, among others at 0 mm.
Relative humidity in Qal‘at Bīshah during September averages 19%. The most humid September was 1986 at 28%, and the least humid was 1997 at 16%.
September receives about 6.6 kWh/m²/day of solar energy in Qal‘at Bīshah. The sunniest Septembers were 2005, 2010 and 2020, among others at 7 kWh/m²/day, and the cloudiest was 1984 at 6.
Average wind speed in Qal‘at Bīshah during September is 3.2 m/s. The windiest September was 2018 at 3.7 m/s, while the calmest were 2003, 2006 and 2011, among others at 2.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 28.4°C | 28.9°C | 29.3°C | 29.7°C | 30.0°C | +1.6°C |
| Avg High | 36.1°C | 36.4°C | 36.8°C | 37.1°C | 37.4°C | +1.3°C |
| Avg Low | 20.7°C | 21.4°C | 21.7°C | 22.3°C | 22.7°C | +2°C |
| Avg Rain | 4 mm | 1 mm | 0 mm | 0 mm | 1 mm | -3 mm |
September temperatures in Qal‘at Bīshah have risen by about 1.8°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 15.2°C (1989) to a record high of 40.8°C (2015).
Rainfall in September is about average for rainfall, averaging 1 mm, with a wettest year of 29 mm.
A quieter season to visit Qal‘at Bīshah
If your dates are flexible, the more temperate months of November and March tend to be the most comfortable for visiting Qal‘at Bīshah. That said, September — with days averaging 36.7°C and nights around 21.7°C (mean 29.2°C) and low rainfall (1 mm) — can still be rewarding for travellers who don't mind the warmth, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 37.6°C | 30.4°C | 23.1°C | 39.3°C | 20.8°C | 1 mm | 24% | 3.2 m/s | 6.6 |
| 2024 | 38.1°C | 30.8°C | 23.5°C | 39.9°C | 21.4°C | 1 mm | 22% | 2.9 m/s | 6.6 |
| 2023 🔥 | 38.3°C | 30.9°C | 23.5°C | 39.8°C | 20.8°C | 0 mm | 17% | 3.3 m/s | 6.6 |
| 2022 | 36.8°C | 29.5°C | 22.2°C | 39.5°C | 18.3°C | 3 mm | 22% | 3.2 m/s | 6.7 |
| 2021 | 37.1°C | 29.6°C | 22.2°C | 38.7°C | 19.5°C | 1 mm | 19% | 3 m/s | 6.7 |
| 2020 | 36.6°C | 29.0°C | 21.4°C | 38.4°C | 18.6°C | 0 mm | 18% | 3.2 m/s | 7 |
| 2019 | 37.5°C | 30.4°C | 23.3°C | 40.7°C | 21.0°C | 0 mm | 21% | 3.3 m/s | 6.7 |
| 2018 | 37.7°C | 30.1°C | 22.5°C | 39.9°C | 19.4°C | 0 mm | 17% | 3.7 m/s | 6.9 |
| 2017 | 36.8°C | 29.4°C | 21.9°C | 38.8°C | 17.1°C | 0 mm | 18% | 3.2 m/s | 6.9 |
| 2016 | 37.1°C | 29.7°C | 22.3°C | 39.6°C | 18.3°C | 0 mm | 19% | 3.1 m/s | 6.7 |
| 2015 | 37.3°C | 29.9°C | 22.4°C | 40.8°C | 17.6°C | 0 mm | 17% | 3.3 m/s | 6.8 |
| 2014 | 36.7°C | 29.3°C | 21.9°C | 39.1°C | 18.1°C | 0 mm | 23% | 3.1 m/s | 6.5 |
| 2013 | 37.2°C | 29.8°C | 22.3°C | 39.2°C | 20.4°C | 0 mm | 20% | 2.9 m/s | 6.7 |
| 2012 | 36.8°C | 29.3°C | 21.8°C | 39.8°C | 18.2°C | 0 mm | 17% | 3.1 m/s | 6.9 |
| 2011 | 37.1°C | 29.8°C | 22.5°C | 39.0°C | 19.8°C | 0 mm | 20% | 2.8 m/s | 6.7 |
| 2010 | 36.7°C | 29.2°C | 21.7°C | 40.7°C | 16.9°C | 0 mm | 17% | 3.4 m/s | 7 |
| 2009 | 37.3°C | 29.7°C | 22.1°C | 40.3°C | 18.5°C | 0 mm | 17% | 3.6 m/s | 6.9 |
| 2008 | 37.4°C | 29.9°C | 22.3°C | 39.7°C | 20.0°C | 0 mm | 18% | 3.3 m/s | 6.7 |
| 2007 | 37.1°C | 29.6°C | 22.0°C | 40.0°C | 18.8°C | 0 mm | 18% | 3.2 m/s | 6.7 |
| 2006 | 37.0°C | 29.4°C | 21.9°C | 38.1°C | 18.6°C | 0 mm | 18% | 2.8 m/s | 6.9 |
| 2005 | 37.1°C | 29.4°C | 21.7°C | 39.4°C | 18.0°C | 0 mm | 18% | 3 m/s | 7 |
| 2004 | 36.6°C | 29.1°C | 21.6°C | 39.2°C | 18.1°C | 0 mm | 17% | 3.1 m/s | 7 |
| 2003 | 36.5°C | 29.2°C | 21.8°C | 39.6°C | 18.7°C | 0 mm | 19% | 2.8 m/s | 6.9 |
| 2002 | 36.6°C | 29.0°C | 21.4°C | 38.5°C | 18.5°C | 0 mm | 17% | 3.4 m/s | 6.9 |
| 2001 | 36.6°C | 28.7°C | 20.9°C | 38.7°C | 18.6°C | 0 mm | 17% | 3.6 m/s | 6.8 |
| 2000 | 36.0°C | 28.6°C | 21.2°C | 39.8°C | 18.3°C | 0 mm | 21% | 3.3 m/s | 6.6 |
| 1999 | 36.7°C | 29.4°C | 22.2°C | 39.0°C | 20.2°C | 4 mm | 24% | 3.2 m/s | 6.4 |
| 1998 | 37.3°C | 30.0°C | 22.7°C | 39.7°C | 19.9°C | 1 mm | 22% | 3 m/s | 6.8 |
| 1997 | 37.0°C | 29.3°C | 21.5°C | 38.7°C | 20.1°C | 5 mm | 16% | 3.3 m/s | 6.9 |
| 1996 | 36.1°C | 28.6°C | 21.1°C | 38.9°C | 17.5°C | 0 mm | 17% | 3.1 m/s | 6.5 |
| 1995 | 36.3°C | 28.7°C | 21.1°C | 38.4°C | 18.1°C | 0 mm | 20% | 2.8 m/s | 6.6 |
| 1994 | 35.9°C | 28.6°C | 21.4°C | 38.0°C | 16.0°C | 0 mm | 19% | 3.2 m/s | 6.3 |
| 1993 | 36.5°C | 28.9°C | 21.3°C | 38.8°C | 17.5°C | 0 mm | 17% | 3.1 m/s | 6.5 |
| 1992 | 35.1°C | 27.6°C | 20.0°C | 36.6°C | 17.9°C | 0 mm | 18% | 3.2 m/s | 6.3 |
| 1991 | 36.3°C | 28.6°C | 20.9°C | 38.0°C | 17.5°C | 0 mm | 17% | 3 m/s | 6.5 |
| 1990 | 36.8°C | 29.1°C | 21.5°C | 38.8°C | 18.6°C | 0 mm | 19% | 2.8 m/s | 6.3 |
| 1989 | 35.4°C | 27.9°C | 20.4°C | 37.9°C | 15.2°C | 0 mm | 18% | 3.4 m/s | 6.4 |
| 1988 | 36.2°C | 28.9°C | 21.5°C | 38.5°C | 17.6°C | 0 mm | 18% | 3.2 m/s | 6.1 |
| 1987 | 37.4°C | 29.7°C | 21.9°C | 39.5°C | 19.3°C | 0 mm | 17% | 3.3 m/s | 6.4 |
| 1986 ❄️ 🌧️ | 35.0°C | 27.4°C | 19.7°C | 37.8°C | 17.1°C | 29 mm | 28% | 2.9 m/s | 6.5 |
| 1985 | 36.1°C | 28.3°C | 20.5°C | 38.1°C | 16.4°C | 5 mm | 18% | 3.2 m/s | 6.2 |
| 1984 | 35.9°C | 28.3°C | 20.6°C | 38.3°C | 17.3°C | 0 mm | 17% | 3.4 m/s | 6 |
| 1983 | 36.8°C | 28.9°C | 21.1°C | 39.0°C | 18.2°C | 1 mm | 18% | 2.9 m/s | — |
| 1982 | 36.0°C | 28.2°C | 20.4°C | 38.5°C | 17.6°C | 3 mm | 17% | 3.6 m/s | — |
| 1981 | 36.0°C | 28.2°C | 20.4°C | 37.5°C | 17.5°C | 1 mm | 17% | 3 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 36.7°C with lows near 21.7°C (mean 29.2°C), based on 45 years of NASA POWER data.
September averages 1 mm of rainfall in Qal‘at Bīshah, about average for rainfall. The wettest on record was 29 mm in 1986.
The hottest September reached 40.8°C in 2015. The coldest dipped to 15.2°C in 1989.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 1.8°C. Daytime highs moved from 36.2°C to 37.6°C and overnight lows from 20.6°C to 22.9°C over the same span.
September is one of the warmer months of the year in Qal‘at Bīshah and about average for rainfall, so plan for around 36.7°C daytime highs and 21.7°C at night.
Not quite — September is the 9th coolest month in Qal‘at Bīshah, averaging 29.2°C.
For September in Qal‘at Bīshah, pack light, breathable clothing and sun protection, with typical highs of 36.7°C and lows of 21.7°C.
Relative humidity in September averages 19% — relatively dry.
Average wind speed in September is 3.2 m/s. The windiest September on record averaged 3.7 m/s (2018).
The wettest September on record was 1986 with 29 mm. On average, September sees 1 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Qal‘at Bīshah behaves each September, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for September specifically, along with year-by-year records and how the month has changed over the decades.
