September is one of the warmer months of the year in An Nimāş, with average highs near 38.7°C and lows around 25°C (mean 31.9°C). It is about average for rainfall, averaging 2 mm of rainfall and 33% relative humidity across the period.
September is one of the warmer months of the year in An Nimāş. Across 45 years of records, the warmest September in An Nimāş was 2023 — when the month averaged 33.9°C — while the coldest was 1986 at 28.8°C. Typical September days reach 38.7°C with nights near 25°C. The long-term trend is warming, about 0.3°C per decade.
September is about average for rainfall in An Nimāş, averaging 2 mm of rainfall. The wettest September on record was 1986 with 36 mm, while the driest were 2017, 2018 and 2019, among others at 0 mm.
Relative humidity in An Nimāş during September averages 33%. The most humid September was 1986 at 48%, and the least humid was 1989 at 26%.
September receives about 6.6 kWh/m²/day of solar energy in An Nimāş. The sunniest Septembers were 2004, 2005 and 2010 at 7 kWh/m²/day, and the cloudiest was 1988 at 5.9.
Average wind speed in An Nimāş during September is 2.2 m/s. The windiest September was 1983 at 2.6 m/s, while the calmest was 2018 at 1.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 31.3°C | 31.4°C | 32.1°C | 32.2°C | 32.4°C | +1.1°C |
| Avg High | 38.2°C | 38.1°C | 39.0°C | 38.9°C | 39.1°C | +0.9°C |
| Avg Low | 24.2°C | 24.7°C | 25.2°C | 25.5°C | 25.6°C | +1.4°C |
| Avg Rain | 6 mm | 2 mm | 0 mm | 1 mm | 4 mm | -2 mm |
September temperatures in An Nimāş have risen by about 1.1°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 19.9°C (1994) to a record high of 43.6°C (2023).
Rainfall in September is about average for rainfall, averaging 2 mm, with a wettest year of 36 mm.
A quieter season to visit An Nimāş
If your dates are flexible, the more temperate months of January and December tend to be the most comfortable for visiting An Nimāş. That said, September — with days averaging 38.7°C and nights around 25°C (mean 31.9°C) and low rainfall (2 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 | 38.4°C | 31.9°C | 25.4°C | 41.5°C | 23.9°C | 2 mm | 41% | 2 m/s | 6.4 |
| 2024 | 37.8°C | 31.6°C | 25.3°C | 41.0°C | 24.1°C | 3 mm | 44% | 2.1 m/s | 6.7 |
| 2023 🔥 | 40.8°C | 33.9°C | 27.0°C | 43.6°C | 25.1°C | 2 mm | 27% | 2.3 m/s | 6.5 |
| 2022 | 39.2°C | 32.4°C | 25.6°C | 42.0°C | 23.0°C | 6 mm | 34% | 2.2 m/s | 6.6 |
| 2021 | 39.1°C | 32.4°C | 25.6°C | 43.1°C | 23.1°C | 6 mm | 36% | 2.2 m/s | 6.6 |
| 2020 | 39.5°C | 32.2°C | 24.9°C | 41.1°C | 23.6°C | 3 mm | 30% | 2.2 m/s | 6.9 |
| 2019 | 39.8°C | 33.1°C | 26.3°C | 42.4°C | 24.7°C | 0 mm | 33% | 2.2 m/s | 6.6 |
| 2018 | 39.7°C | 32.7°C | 25.7°C | 41.6°C | 23.8°C | 0 mm | 31% | 1.9 m/s | 6.9 |
| 2017 | 39.0°C | 32.2°C | 25.3°C | 42.1°C | 22.6°C | 0 mm | 30% | 2.2 m/s | 6.9 |
| 2016 | 38.9°C | 32.2°C | 25.6°C | 42.5°C | 23.7°C | 0 mm | 34% | 2.3 m/s | 6.6 |
| 2015 | 38.8°C | 32.3°C | 25.8°C | 42.3°C | 22.9°C | 0 mm | 32% | 2.2 m/s | 6.8 |
| 2014 | 38.1°C | 31.5°C | 24.8°C | 40.9°C | 23.1°C | 2 mm | 38% | 2.3 m/s | 6.4 |
| 2013 | 39.2°C | 32.3°C | 25.5°C | 42.9°C | 23.2°C | 1 mm | 33% | 2.2 m/s | 6.6 |
| 2012 | 38.9°C | 32.2°C | 25.5°C | 40.6°C | 22.6°C | 0 mm | 27% | 2.4 m/s | 6.8 |
| 2011 | 38.0°C | 31.7°C | 25.5°C | 40.6°C | 23.4°C | 4 mm | 35% | 2.3 m/s | 6.6 |
| 2010 | 39.0°C | 31.8°C | 24.7°C | 41.3°C | 21.1°C | 0 mm | 31% | 2.2 m/s | 7 |
| 2009 | 39.8°C | 32.6°C | 25.4°C | 42.5°C | 22.8°C | 0 mm | 28% | 2.3 m/s | 6.9 |
| 2008 | 39.1°C | 32.5°C | 25.9°C | 41.7°C | 23.0°C | 0 mm | 33% | 2.2 m/s | 6.6 |
| 2007 | 39.0°C | 32.1°C | 25.2°C | 41.1°C | 23.3°C | 0 mm | 32% | 2.3 m/s | 6.7 |
| 2006 | 38.3°C | 31.9°C | 25.4°C | 40.1°C | 24.0°C | 0 mm | 36% | 2.3 m/s | 6.8 |
| 2005 | 39.2°C | 32.3°C | 25.4°C | 42.9°C | 22.7°C | 0 mm | 32% | 2.3 m/s | 7 |
| 2004 | 38.8°C | 32.2°C | 25.5°C | 41.8°C | 22.9°C | 0 mm | 29% | 2.3 m/s | 7 |
| 2003 | 38.7°C | 32.0°C | 25.3°C | 41.4°C | 23.1°C | 2 mm | 33% | 2.4 m/s | 6.8 |
| 2002 | 39.4°C | 32.1°C | 24.8°C | 42.2°C | 22.1°C | 1 mm | 28% | 2.2 m/s | 6.9 |
| 2001 | 39.5°C | 32.0°C | 24.4°C | 43.5°C | 23.1°C | 0 mm | 29% | 2.2 m/s | 6.8 |
| 2000 | 38.3°C | 31.6°C | 24.9°C | 40.0°C | 23.0°C | 0 mm | 34% | 2.3 m/s | 6.6 |
| 1999 | 37.4°C | 31.0°C | 24.6°C | 40.7°C | 22.8°C | 19 mm | 40% | 2.2 m/s | 6.4 |
| 1998 | 37.9°C | 31.5°C | 25.1°C | 42.3°C | 22.6°C | 1 mm | 41% | 2.1 m/s | 6.6 |
| 1997 | 38.6°C | 31.9°C | 25.3°C | 41.2°C | 23.9°C | 2 mm | 31% | 2.1 m/s | 6.8 |
| 1996 | 39.0°C | 31.9°C | 24.9°C | 41.4°C | 21.4°C | 0 mm | 28% | 2.1 m/s | 6.5 |
| 1995 | 37.8°C | 31.2°C | 24.5°C | 40.7°C | 21.6°C | 1 mm | 35% | 2.3 m/s | 6.5 |
| 1994 | 36.3°C | 30.4°C | 24.6°C | 40.7°C | 19.9°C | 1 mm | 37% | 2.3 m/s | 6.3 |
| 1993 | 38.5°C | 31.6°C | 24.8°C | 42.2°C | 23.0°C | 1 mm | 32% | 2.2 m/s | 6.4 |
| 1992 | 38.3°C | 30.9°C | 23.6°C | 40.2°C | 22.2°C | 0 mm | 30% | 2.1 m/s | 6.4 |
| 1991 | 38.9°C | 31.6°C | 24.3°C | 40.8°C | 22.6°C | 0 mm | 28% | 2.1 m/s | 6.5 |
| 1990 | 38.6°C | 31.9°C | 25.3°C | 41.5°C | 23.0°C | 0 mm | 31% | 2.4 m/s | 6.5 |
| 1989 | 39.1°C | 31.8°C | 24.4°C | 42.3°C | 21.1°C | 0 mm | 26% | 2.3 m/s | 6.5 |
| 1988 | 39.2°C | 32.0°C | 24.9°C | 41.4°C | 22.2°C | 0 mm | 30% | 2.2 m/s | 5.9 |
| 1987 | 39.3°C | 32.1°C | 24.9°C | 40.8°C | 22.7°C | 0 mm | 31% | 2.2 m/s | 6.4 |
| 1986 ❄️ 🌧️ | 35.0°C | 28.8°C | 22.5°C | 38.2°C | 20.2°C | 36 mm | 48% | 2.1 m/s | 6.4 |
| 1985 | 38.2°C | 31.1°C | 23.9°C | 41.2°C | 21.2°C | 5 mm | 31% | 2.3 m/s | 6.3 |
| 1984 | 37.9°C | 31.2°C | 24.4°C | 40.8°C | 22.2°C | 0 mm | 30% | 2.2 m/s | 6.2 |
| 1983 | 38.4°C | 31.6°C | 24.8°C | 40.5°C | 23.1°C | 2 mm | 31% | 2.6 m/s | — |
| 1982 | 38.6°C | 31.4°C | 24.2°C | 40.6°C | 22.3°C | 6 mm | 28% | 2.4 m/s | — |
| 1981 | 38.3°C | 31.3°C | 24.2°C | 41.0°C | 22.1°C | 0 mm | 30% | 2.2 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 38.7°C with lows near 25°C (mean 31.9°C), based on 45 years of NASA POWER data.
September averages 2 mm of rainfall in An Nimāş, about average for rainfall. The wettest on record was 36 mm in 1986.
The hottest September reached 43.6°C in 2023. The coldest dipped to 19.9°C in 1994.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 1.1°C. Daytime highs moved from 38.3°C to 39.1°C and overnight lows from 24.3°C to 25.8°C over the same span.
September is one of the warmer months of the year in An Nimāş and about average for rainfall, so plan for around 38.7°C daytime highs and 25°C at night.
Not quite — September is the 11th coolest month in An Nimāş, averaging 31.9°C.
For September in An Nimāş, pack light, breathable clothing and sun protection, with typical highs of 38.7°C and lows of 25°C.
Relative humidity in September averages 33% — relatively dry.
Average wind speed in September is 2.2 m/s. The windiest September on record averaged 2.6 m/s (1983).
The wettest September on record was 1986 with 36 mm. On average, September sees 2 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 An Nimāş 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.
