September is one of the warmer months of the year in Al Kharj, with average highs near 41.2°C and lows around 25.3°C (mean 33.3°C). It is about average for rainfall, averaging 0 mm of rainfall and 16% relative humidity across the period.
September is one of the warmer months of the year in Al Kharj. Across 45 years of records, the warmest September in Al Kharj was 2023 — when the month averaged 35.3°C — while the coldest was 1983 at 31.9°C. Typical September days reach 41.2°C with nights near 25.3°C. The long-term trend is warming, about 0.5°C per decade.
September is about average for rainfall in Al Kharj, averaging 0 mm of rainfall. The wettest September on record was 1982 with 2 mm, while the driest were 2023, 2024 and 2025, among others at 0 mm.
Relative humidity in Al Kharj during September averages 16%. The most humid September was 1994 at 19%, and the least humid was 1983 at 13%.
September receives about 6.7 kWh/m²/day of solar energy in Al Kharj. The sunniest Septembers were 2004, 2005 and 2006, among others at 7 kWh/m²/day, and the cloudiest were 1988, 1989 and 1991 at 6.3.
Average wind speed in Al Kharj during September is 2.4 m/s. The windiest September was 2021 at 3 m/s, while the calmest were 1982, 1986 and 1997, among others at 2.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 32.6°C | 33.0°C | 33.1°C | 33.8°C | 34.1°C | +1.5°C |
| Avg High | 40.8°C | 41.0°C | 41.1°C | 41.6°C | 41.9°C | +1.1°C |
| Avg Low | 24.4°C | 25.0°C | 25.1°C | 25.9°C | 26.3°C | +1.9°C |
| Avg Rain | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm |
September temperatures in Al Kharj have risen by about 1.8°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 18.6°C (2013) to a record high of 46.2°C (2016).
Rainfall in September is about average for rainfall, averaging 0 mm, with a wettest year of 2 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.3°C per decade while lows rose 0.6°C per decade, narrowing the gap between day and night.
A quieter season to visit Al Kharj
If your dates are flexible, the more temperate months of November and March tend to be the most comfortable for visiting Al Kharj. That said, September — with days averaging 41.2°C and nights around 25.3°C (mean 33.3°C) and low rainfall (0 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 | 42.3°C | 34.5°C | 26.7°C | 44.7°C | 23.6°C | 0 mm | 17% | 2.5 m/s | 6.5 |
| 2024 | 42.0°C | 34.5°C | 26.9°C | 45.3°C | 24.2°C | 0 mm | 18% | 2.5 m/s | 6.6 |
| 2023 🔥 | 43.2°C | 35.3°C | 27.4°C | 45.3°C | 25.2°C | 0 mm | 14% | 2.4 m/s | 6.6 |
| 2022 | 41.5°C | 33.7°C | 25.8°C | 44.4°C | 21.0°C | 0 mm | 16% | 2.3 m/s | 6.7 |
| 2021 | 40.8°C | 32.9°C | 25.0°C | 44.7°C | 19.6°C | 0 mm | 15% | 3 m/s | 6.9 |
| 2020 | 41.5°C | 33.9°C | 26.2°C | 43.3°C | 22.0°C | 0 mm | 15% | 2.2 m/s | 6.8 |
| 2019 | 42.6°C | 34.8°C | 27.0°C | 45.8°C | 24.3°C | 0 mm | 17% | 2.4 m/s | 6.8 |
| 2018 | 43.1°C | 35.2°C | 27.3°C | 45.8°C | 24.5°C | 0 mm | 16% | 2.3 m/s | 6.7 |
| 2017 | 41.8°C | 33.9°C | 26.0°C | 44.5°C | 22.8°C | 0 mm | 14% | 2.3 m/s | 6.8 |
| 2016 | 41.6°C | 33.8°C | 25.9°C | 46.2°C | 21.3°C | 0 mm | 17% | 2.5 m/s | 6.7 |
| 2015 | 41.3°C | 33.9°C | 26.4°C | 46.1°C | 21.4°C | 0 mm | 17% | 2.3 m/s | 6.6 |
| 2014 | 41.0°C | 33.3°C | 25.5°C | 44.2°C | 21.5°C | 0 mm | 16% | 2.2 m/s | 6.7 |
| 2013 | 40.8°C | 32.8°C | 24.9°C | 44.3°C | 18.6°C | 0 mm | 15% | 2.3 m/s | 6.7 |
| 2012 | 41.0°C | 33.0°C | 25.1°C | 44.6°C | 21.4°C | 0 mm | 15% | 2.7 m/s | 6.8 |
| 2011 | 41.5°C | 33.5°C | 25.4°C | 43.9°C | 23.2°C | 0 mm | 15% | 2.5 m/s | 6.8 |
| 2010 | 41.5°C | 33.7°C | 25.9°C | 45.0°C | 23.0°C | 0 mm | 16% | 2.4 m/s | 6.8 |
| 2009 | 41.9°C | 33.7°C | 25.6°C | 44.4°C | 22.7°C | 0 mm | 16% | 2.5 m/s | 6.7 |
| 2008 | 41.7°C | 34.0°C | 26.3°C | 45.0°C | 23.0°C | 0 mm | 17% | 2.2 m/s | 6.5 |
| 2007 | 41.5°C | 33.5°C | 25.6°C | 45.0°C | 21.8°C | 0 mm | 15% | 2.6 m/s | 6.8 |
| 2006 | 40.7°C | 32.6°C | 24.5°C | 43.8°C | 19.9°C | 0 mm | 14% | 2.2 m/s | 7 |
| 2005 | 40.9°C | 32.7°C | 24.5°C | 44.6°C | 21.7°C | 0 mm | 14% | 2.4 m/s | 7 |
| 2004 | 40.9°C | 32.8°C | 24.7°C | 44.3°C | 20.3°C | 0 mm | 16% | 2.4 m/s | 7 |
| 2003 | 40.4°C | 32.3°C | 24.2°C | 44.6°C | 20.8°C | 0 mm | 15% | 2.5 m/s | 6.9 |
| 2002 | 41.6°C | 33.5°C | 25.4°C | 43.7°C | 22.2°C | 0 mm | 14% | 2.2 m/s | 6.8 |
| 2001 | 41.5°C | 33.6°C | 25.6°C | 44.6°C | 22.6°C | 0 mm | 15% | 2.4 m/s | 6.7 |
| 2000 | 40.3°C | 32.3°C | 24.3°C | 42.3°C | 22.2°C | 0 mm | 15% | 2.5 m/s | 6.6 |
| 1999 | 41.8°C | 34.1°C | 26.4°C | 45.3°C | 23.3°C | 0 mm | 17% | 2.7 m/s | 6.8 |
| 1998 | 42.4°C | 34.6°C | 26.8°C | 45.3°C | 23.9°C | 0 mm | 17% | 2.5 m/s | 6.7 |
| 1997 | 41.7°C | 33.5°C | 25.3°C | 43.5°C | 21.8°C | 0 mm | 14% | 2.1 m/s | 7 |
| 1996 | 40.5°C | 32.6°C | 24.7°C | 43.7°C | 21.3°C | 0 mm | 17% | 2.4 m/s | 6.9 |
| 1995 | 40.4°C | 32.3°C | 24.3°C | 43.4°C | 20.7°C | 0 mm | 16% | 2.4 m/s | 6.9 |
| 1994 | 40.2°C | 32.5°C | 24.8°C | 42.4°C | 23.0°C | 0 mm | 19% | 2.3 m/s | 6.7 |
| 1993 | 40.7°C | 32.6°C | 24.5°C | 43.3°C | 22.0°C | 0 mm | 15% | 2.4 m/s | 6.9 |
| 1992 | 40.1°C | 32.3°C | 24.6°C | 41.9°C | 20.5°C | 0 mm | 16% | 2.4 m/s | 6.5 |
| 1991 | 40.7°C | 32.2°C | 23.8°C | 42.7°C | 20.6°C | 0 mm | 16% | 2.5 m/s | 6.3 |
| 1990 | 41.2°C | 32.8°C | 24.5°C | 43.8°C | 20.3°C | 0 mm | 13% | 2.4 m/s | 6.6 |
| 1989 | 40.0°C | 32.0°C | 24.0°C | 43.9°C | 18.7°C | 0 mm | 17% | 2.4 m/s | 6.3 |
| 1988 | 41.3°C | 32.8°C | 24.4°C | 44.9°C | 19.8°C | 0 mm | 17% | 2.8 m/s | 6.3 |
| 1987 | 41.9°C | 33.7°C | 25.4°C | 44.5°C | 22.8°C | 0 mm | 16% | 2.5 m/s | 6.7 |
| 1986 | 40.7°C | 32.4°C | 24.2°C | 42.8°C | 22.1°C | 0 mm | 15% | 2.1 m/s | 6.5 |
| 1985 | 40.7°C | 32.5°C | 24.3°C | 44.0°C | 20.1°C | 0 mm | 15% | 2.3 m/s | 6.8 |
| 1984 | 40.5°C | 32.3°C | 24.2°C | 43.1°C | 21.2°C | 0 mm | 14% | 2.7 m/s | 6.6 |
| 1983 ❄️ | 40.1°C | 31.9°C | 23.8°C | 42.7°C | 20.0°C | 0 mm | 13% | 2.2 m/s | — |
| 1982 🌧️ | 41.3°C | 33.1°C | 24.9°C | 43.7°C | 23.1°C | 2 mm | 15% | 2.1 m/s | — |
| 1981 | 40.4°C | 32.4°C | 24.3°C | 42.3°C | 21.3°C | 0 mm | 14% | 2.1 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 41.2°C with lows near 25.3°C (mean 33.3°C), based on 45 years of NASA POWER data.
September averages 0 mm of rainfall in Al Kharj, about average for rainfall. The wettest on record was 2 mm in 1982.
The hottest September reached 46.2°C in 2016. The coldest dipped to 18.6°C in 2013.
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 40.6°C to 42°C and overnight lows from 24.3°C to 26.4°C over the same span.
September is one of the warmer months of the year in Al Kharj and about average for rainfall, so plan for around 41.2°C daytime highs and 25.3°C at night.
Not quite — September is the 9th coolest month in Al Kharj, averaging 33.3°C.
For September in Al Kharj, pack light, breathable clothing and sun protection, with typical highs of 41.2°C and lows of 25.3°C.
Relative humidity in September averages 16% — relatively dry.
Average wind speed in September is 2.4 m/s. The windiest September on record averaged 3 m/s (2021).
The wettest September on record was 1982 with 2 mm. On average, September sees 0 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 Al Kharj 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.
