September is one of the cooler months of the year in Nirmal, with average highs near 29.6°C and lows around 22.2°C (mean 25.9°C). It is a relatively wet time of year, averaging 155 mm of rainfall and 84% relative humidity across the period.
September is one of the cooler months of the year in Nirmal. Across 45 years of records, the warmest Septembers in Nirmal were 1987, 2015 and 2017 — when the month averaged 27.1°C — while the coldest was 1994 at 24.6°C. Typical September days reach 29.6°C with nights near 22.2°C. The long-term September temperature trend is broadly flat.
September is a relatively wet time of year in Nirmal, averaging 155 mm of rainfall. The wettest September on record was 2021 with 320 mm, while the driest was 1985 at 26 mm.
Relative humidity in Nirmal during September averages 84%. The most humid September was 1981 at 89%, and the least humid was 1985 at 76%.
September receives about 4.7 kWh/m²/day of solar energy in Nirmal. The sunniest Septembers were 1986, 1991 and 2002 at 5.4 kWh/m²/day, and the cloudiest were 1999 and 2023 at 3.6.
Average wind speed in Nirmal during September is 2 m/s. The windiest September was 2016 at 2.6 m/s, while the calmest were 1986, 2001 and 2020 at 1.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 26.0°C | 25.5°C | 25.9°C | 26.0°C | 26.1°C | +0.1°C |
| Avg High | 29.7°C | 29.2°C | 29.7°C | 29.8°C | 29.3°C | -0.4°C |
| Avg Low | 22.2°C | 21.8°C | 22.2°C | 22.3°C | 22.8°C | +0.6°C |
| Avg Rain | 145 mm | 136 mm | 153 mm | 136 mm | 236 mm | +92 mm |
September temperatures in Nirmal have stayed relatively stable across the record.
September has ranged from a record low of 16.2°C (1994) to a record high of 34.8°C (1985).
Rainfall in September is a relatively wet time of year, averaging 155 mm, with a wettest year of 320 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0°C per decade while lows rose 0.2°C per decade, narrowing the gap between day and night.
A good time to visit Nirmal
September is a good time to visit Nirmal, with days averaging 29.6°C and nights around 22.2°C (mean 25.9°C, cooler than Nirmal's yearly average) and higher rainfall. December and January are marginally more temperate, but September still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 28.8°C | 25.8°C | 22.8°C | 30.8°C | 20.5°C | 301 mm | 89% | 2.1 m/s | 3.9 |
| 2024 | 29.3°C | 26.0°C | 22.7°C | 31.1°C | 21.0°C | 212 mm | 88% | 2.4 m/s | 4.4 |
| 2023 | 29.5°C | 26.3°C | 23.0°C | 31.4°C | 21.4°C | 215 mm | 87% | 2.1 m/s | 3.6 |
| 2022 | 29.4°C | 25.9°C | 22.5°C | 32.1°C | 20.0°C | 208 mm | 87% | 2 m/s | 4.3 |
| 2021 🌧️ | 28.8°C | 25.8°C | 22.8°C | 30.5°C | 20.4°C | 320 mm | 89% | 2.2 m/s | 4.1 |
| 2020 | 29.9°C | 26.6°C | 23.3°C | 31.6°C | 21.7°C | 162 mm | 86% | 1.5 m/s | 4.3 |
| 2019 | 29.4°C | 26.2°C | 22.9°C | 31.4°C | 22.0°C | 166 mm | 87% | 2.3 m/s | 3.9 |
| 2018 | 30.6°C | 26.0°C | 21.5°C | 33.4°C | 18.8°C | 39 mm | 78% | 1.9 m/s | 5.2 |
| 2017 | 31.3°C | 27.1°C | 22.9°C | 32.7°C | 21.4°C | 72 mm | 80% | 1.7 m/s | 4.9 |
| 2016 | 29.5°C | 25.9°C | 22.4°C | 31.6°C | 20.3°C | 240 mm | 85% | 2.6 m/s | 4 |
| 2015 | 31.7°C | 27.1°C | 22.6°C | 33.7°C | 18.1°C | 86 mm | 77% | 1.8 m/s | 5.2 |
| 2014 | 29.5°C | 25.5°C | 21.6°C | 31.0°C | 19.4°C | 133 mm | 82% | 2.5 m/s | 4.8 |
| 2013 | 29.2°C | 25.7°C | 22.3°C | 30.2°C | 20.0°C | 116 mm | 86% | 1.8 m/s | 4.7 |
| 2012 | 29.2°C | 25.7°C | 22.2°C | 31.7°C | 20.8°C | 182 mm | 86% | 2 m/s | 4.8 |
| 2011 | 29.3°C | 25.8°C | 22.3°C | 30.9°C | 20.8°C | 104 mm | 86% | 2.3 m/s | 4.9 |
| 2010 | 28.4°C | 25.3°C | 22.3°C | 30.1°C | 19.7°C | 216 mm | 88% | 2.1 m/s | 4.5 |
| 2009 | 30.4°C | 26.5°C | 22.6°C | 32.5°C | 20.6°C | 103 mm | 83% | 1.9 m/s | 5.3 |
| 2008 | 29.0°C | 25.3°C | 21.7°C | 30.9°C | 18.5°C | 228 mm | 86% | 2 m/s | 4.9 |
| 2007 | 28.9°C | 25.7°C | 22.6°C | 31.1°C | 19.9°C | 273 mm | 88% | 2 m/s | 4.6 |
| 2006 | 29.1°C | 25.7°C | 22.2°C | 31.8°C | 20.4°C | 298 mm | 87% | 1.8 m/s | 4.9 |
| 2005 | 29.1°C | 25.8°C | 22.5°C | 31.6°C | 19.9°C | 254 mm | 88% | 2.2 m/s | 4.6 |
| 2004 | 30.6°C | 26.6°C | 22.5°C | 33.1°C | 21.5°C | 90 mm | 81% | 1.7 m/s | 5.1 |
| 2003 | 29.1°C | 25.7°C | 22.4°C | 30.6°C | 20.9°C | 90 mm | 86% | 2.5 m/s | 4.5 |
| 2002 | 30.4°C | 25.8°C | 21.3°C | 32.7°C | 19.9°C | 49 mm | 81% | 2.2 m/s | 5.4 |
| 2001 | 30.6°C | 26.4°C | 22.1°C | 33.5°C | 21.0°C | 86 mm | 80% | 1.5 m/s | 5.2 |
| 2000 | 30.0°C | 25.9°C | 21.9°C | 31.8°C | 20.1°C | 61 mm | 82% | 1.9 m/s | 5.2 |
| 1999 | 28.7°C | 25.4°C | 22.1°C | 31.0°C | 21.1°C | 145 mm | 87% | 2.4 m/s | 3.6 |
| 1998 | 28.8°C | 25.8°C | 22.7°C | 30.0°C | 21.4°C | 195 mm | 89% | 2.1 m/s | 4.3 |
| 1997 | 29.4°C | 25.8°C | 22.2°C | 31.5°C | 19.4°C | 84 mm | 84% | 1.6 m/s | 4.7 |
| 1996 | 29.3°C | 25.6°C | 22.0°C | 31.3°C | 20.0°C | 227 mm | 85% | 1.7 m/s | 4.9 |
| 1995 | 29.6°C | 25.7°C | 21.8°C | 31.3°C | 20.5°C | 170 mm | 84% | 2.2 m/s | 4.8 |
| 1994 ❄️ | 28.7°C | 24.6°C | 20.4°C | 30.2°C | 16.2°C | 89 mm | 83% | 2.2 m/s | 5 |
| 1993 | 28.9°C | 25.5°C | 22.0°C | 30.7°C | 20.2°C | 190 mm | 86% | 2.2 m/s | 4.5 |
| 1992 | 29.1°C | 24.9°C | 20.6°C | 30.5°C | 18.0°C | 91 mm | 83% | 2.2 m/s | 5.1 |
| 1991 | 30.2°C | 26.1°C | 21.9°C | 31.9°C | 20.6°C | 83 mm | 79% | 1.6 m/s | 5.4 |
| 1990 | 29.1°C | 25.5°C | 22.0°C | 30.0°C | 19.1°C | 88 mm | 86% | 2.4 m/s | 4.7 |
| 1989 | 29.1°C | 25.6°C | 22.1°C | 31.7°C | 20.8°C | 86 mm | 85% | 2 m/s | 5.1 |
| 1988 | 29.0°C | 25.9°C | 22.8°C | 30.9°C | 21.6°C | 175 mm | 89% | 1.8 m/s | 4.3 |
| 1987 🔥 | 31.7°C | 27.1°C | 22.5°C | 34.8°C | 21.5°C | 62 mm | 77% | 2 m/s | 5.2 |
| 1986 | 30.0°C | 26.0°C | 22.0°C | 32.9°C | 20.0°C | 78 mm | 80% | 1.5 m/s | 5.4 |
| 1985 | 31.1°C | 26.6°C | 22.1°C | 34.8°C | 20.3°C | 26 mm | 76% | 2 m/s | 4.9 |
| 1984 | 30.5°C | 26.1°C | 21.6°C | 33.5°C | 20.1°C | 127 mm | 78% | 2.2 m/s | 5.3 |
| 1983 | 28.8°C | 25.6°C | 22.5°C | 30.2°C | 21.7°C | 210 mm | 88% | 2.2 m/s | — |
| 1982 | 29.1°C | 25.4°C | 21.7°C | 31.4°C | 18.6°C | 235 mm | 84% | 1.9 m/s | — |
| 1981 | 28.3°C | 25.3°C | 22.3°C | 30.6°C | 20.7°C | 302 mm | 89% | 2.1 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 29.6°C with lows near 22.2°C (mean 25.9°C), based on 45 years of NASA POWER data.
September averages 155 mm of rainfall in Nirmal, a relatively wet time of year. The wettest on record was 320 mm in 2021.
The hottest September reached 34.8°C in 1985. The coldest dipped to 16.2°C in 1994.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 0.2°C — but days and nights have moved in opposite directions. Overnight lows rose from 22°C to 22.8°C while daytime highs eased from 29.6°C to 29.2°C, narrowing the gap between day and night.
September is one of the cooler months of the year in Nirmal and a relatively wet time of year, so plan for around 29.6°C daytime highs and 22.2°C at night.
Not quite — September is the 5th coolest month in Nirmal, averaging 25.9°C.
For September in Nirmal, pack light layers you can adjust through the day, with typical highs of 29.6°C and lows of 22.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 84% — quite humid.
Average wind speed in September is 2 m/s. The windiest September on record averaged 2.6 m/s (2016).
The wettest September on record was 2021 with 320 mm. On average, September sees 155 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 Nirmal 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.
