September is one of the warmer months of the year in Alwar, with average highs near 37.5°C and lows around 20.6°C (mean 29.1°C). It is a relatively wet time of year, averaging 93 mm of rainfall and 66% relative humidity across the period.
September is one of the warmer months of the year in Alwar. Across 45 years of records, the warmest September in Alwar was 1999 — when the month averaged 32.6°C — while the coldest was 2010 at 25.2°C. Typical September days reach 37.5°C with nights near 20.6°C. The long-term trend is cooling, about 0.2°C per decade.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 29.6°C | 28.7°C | 30.2°C | 28.0°C | 28.8°C | -0.8°C |
| Avg High | 38.7°C | 37.0°C | 39.2°C | 35.9°C | 36.0°C | -2.7°C |
| Avg Low | 20.4°C | 20.4°C | 21.1°C | 20.0°C | 21.7°C | +1.3°C |
| Avg Rain | 57 mm | 117 mm | 70 mm | 90 mm | 154 mm | +97 mm |
September temperatures in Alwar have fallen by about 0.4°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 17.1°C (1994) to a record high of 41.8°C (1987).
Rainfall in September is a relatively wet time of year, averaging 93 mm, with a wettest year of 221 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.5°C per decade while lows rose 0.2°C per decade, narrowing the gap between day and night.
A good time to visit Alwar
September is a good time to visit Alwar, with days averaging 37.5°C and nights around 20.6°C (mean 29.1°C, warmer than Alwar's yearly average) and higher rainfall. November and February are marginally more temperate, but September still suits most travellers.
| Year | High | Low | Avg | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|
| 2025 | 34.1°C | 20.8°C | 27.4°C | 190 mm | 81% | 2 m/s | 5 |
| 2024 | 34.2°C | 22.1°C | 28.1°C | 220 mm | 85% | 1.7 m/s | 4.3 |
| 2023 | 38.0°C | 20.8°C | 29.4°C | 87 mm | 69% | 2 m/s | 4.8 |
| 2022 🌧️ | 38.5°C | 22.1°C | 30.3°C | 221 mm | 70% | 2 m/s | 4.8 |
| 2021 | 32.5°C | 22.4°C | 27.5°C | 167 mm | 87% | 2.4 m/s | 4.1 |
| 2020 | 38.6°C | 22.0°C | 30.3°C | 38 mm | 61% | 1.7 m/s | 5.2 |
| 2019 | 37.2°C | 22.3°C | 29.8°C | 102 mm | 77% | 1.4 m/s | 4.4 |
| 2018 | 35.2°C | 19.9°C | 27.6°C | 130 mm | 77% | 2.4 m/s | 4.4 |
| 2017 | 38.9°C | 19.1°C | 29.0°C | 63 mm | 54% | 1.7 m/s | 5 |
| 2016 | 36.9°C | 21.5°C | 29.2°C | 26 mm | 67% | 1.7 m/s | 5.5 |
| 2015 | 39.4°C | 19.6°C | 29.5°C | 26 mm | 49% | 2 m/s | 5.8 |
| 2014 | 38.0°C | 20.9°C | 29.5°C | 58 mm | 60% | 2.3 m/s | 5.4 |
| 2013 | 34.7°C | 20.7°C | 27.7°C | 86 mm | 76% | 1.9 m/s | 5.4 |
| 2012 | 33.1°C | 18.1°C | 25.6°C | 92 mm | 79% | 1.8 m/s | 5 |
| 2011 | 33.1°C | 19.8°C | 26.5°C | 166 mm | 81% | 2.1 m/s | 5.1 |
| 2010 ❄️ | 32.6°C | 17.8°C | 25.2°C | 151 mm | 81% | 1.7 m/s | 4.4 |
| 2009 | 39.4°C | 21.1°C | 30.3°C | 98 mm | 61% | 2 m/s | 5.6 |
| 2008 | 38.9°C | 20.3°C | 29.6°C | 110 mm | 68% | 1.8 m/s | 5.3 |
| 2007 | 38.7°C | 21.3°C | 30.0°C | 63 mm | 62% | 1.6 m/s | 5.2 |
| 2006 | 38.6°C | 21.4°C | 30.0°C | 58 mm | 58% | 2 m/s | 5.6 |
| 2005 | 41.3°C | 20.8°C | 31.1°C | 107 mm | 61% | 2.6 m/s | 4.9 |
| 2004 | 38.4°C | 20.9°C | 29.6°C | 36 mm | 61% | 2 m/s | 5.7 |
| 2003 | 37.7°C | 21.4°C | 29.5°C | 78 mm | 70% | 1.5 m/s | 4.8 |
| 2002 | 38.4°C | 20.9°C | 29.6°C | 100 mm | 57% | 1.9 m/s | 5.4 |
| 2001 | 40.3°C | 21.7°C | 31.0°C | 23 mm | 43% | 1.9 m/s | 5.8 |
| 2000 | 40.6°C | 21.4°C | 31.0°C | 23 mm | 44% | 2 m/s | 5.5 |
| 1999 🔥 | 41.4°C | 23.8°C | 32.6°C | 56 mm | 57% | 1.8 m/s | 5.1 |
| 1998 | 39.4°C | 23.0°C | 31.2°C | 164 mm | 70% | 1.9 m/s | 5 |
| 1997 | 39.5°C | 21.8°C | 30.7°C | 47 mm | 58% | 2.1 m/s | 5.2 |
| 1996 | 36.2°C | 19.4°C | 27.8°C | 149 mm | 75% | 1.9 m/s | 5.1 |
| 1995 | 35.4°C | 18.1°C | 26.8°C | 112 mm | 74% | 1.7 m/s | 5.5 |
| 1994 | 34.5°C | 17.1°C | 25.8°C | 51 mm | 71% | 2.2 m/s | 5.7 |
| 1993 | 37.7°C | 21.5°C | 29.6°C | 194 mm | 74% | 1.7 m/s | 5.2 |
| 1992 | 35.9°C | 18.8°C | 27.4°C | 122 mm | 70% | 2.4 m/s | 5.1 |
| 1991 | 35.2°C | 18.7°C | 26.9°C | 110 mm | 70% | 2.2 m/s | 5.6 |
| 1990 | 34.8°C | 21.8°C | 28.3°C | 161 mm | 77% | 1.9 m/s | 4.8 |
| 1989 | 39.2°C | 19.7°C | 29.5°C | 58 mm | 54% | 2.1 m/s | 5.7 |
| 1988 | 39.0°C | 19.5°C | 29.2°C | 67 mm | 69% | 2.4 m/s | 5.6 |
| 1987 | 41.8°C | 21.5°C | 31.7°C | 38 mm | 42% | 2.1 m/s | 5.7 |
| 1986 | 40.6°C | 21.4°C | 31.0°C | 35 mm | 47% | 2.1 m/s | 5.3 |
| 1985 | 38.6°C | 20.5°C | 29.5°C | 49 mm | 63% | 2.4 m/s | 5.7 |
| 1984 | 35.7°C | 19.1°C | 27.4°C | 115 mm | 70% | 1.7 m/s | 5.5 |
| 1983 | 36.4°C | 22.2°C | 29.3°C | 90 mm | 74% | 1.7 m/s | — |
| 1982 | 37.4°C | 17.3°C | 27.3°C | 4 mm | 60% | 2.2 m/s | — |
| 1981 | 39.7°C | 22.6°C | 31.2°C | 54 mm | 57% | 2.2 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 37.5°C with lows near 20.6°C (mean 29.1°C), based on 45 years of NASA POWER data.
September averages 93 mm of rainfall in Alwar, a relatively wet time of year. The wettest on record was 221 mm in 2022.
The hottest September reached 41.8°C in 1987. The coldest dipped to 17.1°C in 1994.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have fallen by about 0.4°C. Daytime highs moved from 37.6°C to 35.5°C and overnight lows from 20.3°C to 21.6°C over the same span.
September is one of the warmer months of the year in Alwar and a relatively wet time of year, so plan for around 37.5°C daytime highs and 20.6°C at night.
Not quite — September is the 7th coolest month in Alwar, averaging 29.1°C.
For September in Alwar, pack light, breathable clothing and sun protection, with typical highs of 37.5°C and lows of 20.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 66% — moderately humid.
Average wind speed in September is 2 m/s. The windiest September on record averaged 2.6 m/s (2005).
The wettest September on record was 2022 with 221 mm. On average, September sees 93 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 Alwar 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.
