September is one of the warmer months of the year in Alwar, with average highs near 34.6°C and lows around 23.7°C (mean 29.2°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 1987 — when the month averaged 32.2°C — while the coldest was 2012 at 26.8°C. Typical September days reach 34.6°C with nights near 23.7°C. The long-term September temperature trend is broadly flat.
September is a relatively wet time of year in Alwar, averaging 93 mm of rainfall. The wettest September on record was 2022 with 221 mm, while the driest was 1982 at 4 mm.
Relative humidity in Alwar during September averages 66%. The most humid September was 2021 at 87%, and the least humid was 1987 at 42%.
September receives about 5.2 kWh/m²/day of solar energy in Alwar. The sunniest Septembers were 2001 and 2015 at 5.8 kWh/m²/day, and the cloudiest was 2021 at 4.1.
Average wind speed in Alwar during September is 2 m/s. The windiest September was 2005 at 2.6 m/s, while the calmest was 2019 at 1.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 29.7°C | 28.5°C | 30.2°C | 28.4°C | 28.9°C | -0.8°C |
| Avg High | 35.8°C | 33.7°C | 36.2°C | 33.5°C | 33.3°C | -2.5°C |
| Avg Low | 23.6°C | 23.3°C | 24.1°C | 23.3°C | 24.5°C | +0.9°C |
| Avg Rain | 57 mm | 117 mm | 70 mm | 90 mm | 154 mm | +97 mm |
September temperatures in Alwar have fallen by about 0.3°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 0.4°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 34.6°C and nights around 23.7°C (mean 29.2°C, warmer than Alwar's yearly average) and higher rainfall. November and March 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 | 32.0°C | 27.8°C | 23.5°C | 34.1°C | 20.8°C | 190 mm | 81% | 2 m/s | 5 |
| 2024 | 31.4°C | 27.9°C | 24.4°C | 34.2°C | 22.1°C | 220 mm | 85% | 1.7 m/s | 4.3 |
| 2023 | 34.9°C | 29.8°C | 24.6°C | 38.0°C | 20.8°C | 87 mm | 69% | 2 m/s | 4.8 |
| 2022 🌧️ | 34.7°C | 29.9°C | 25.1°C | 38.5°C | 22.1°C | 221 mm | 70% | 2 m/s | 4.8 |
| 2021 | 30.8°C | 27.6°C | 24.4°C | 32.5°C | 22.4°C | 167 mm | 87% | 2.4 m/s | 4.1 |
| 2020 | 36.2°C | 30.6°C | 25.0°C | 38.6°C | 22.0°C | 38 mm | 61% | 1.7 m/s | 5.2 |
| 2019 | 33.2°C | 29.1°C | 25.0°C | 37.2°C | 22.3°C | 102 mm | 77% | 1.4 m/s | 4.4 |
| 2018 | 31.6°C | 26.9°C | 22.1°C | 35.2°C | 19.9°C | 130 mm | 77% | 2.4 m/s | 4.4 |
| 2017 | 36.7°C | 30.3°C | 23.9°C | 38.9°C | 19.1°C | 63 mm | 54% | 1.7 m/s | 5 |
| 2016 | 34.4°C | 28.7°C | 23.0°C | 36.9°C | 21.5°C | 26 mm | 67% | 1.7 m/s | 5.5 |
| 2015 | 37.1°C | 30.4°C | 23.7°C | 39.4°C | 19.6°C | 26 mm | 49% | 2 m/s | 5.8 |
| 2014 | 35.5°C | 29.3°C | 23.2°C | 38.0°C | 20.9°C | 58 mm | 60% | 2.3 m/s | 5.4 |
| 2013 | 32.6°C | 27.7°C | 22.7°C | 34.7°C | 20.7°C | 86 mm | 76% | 1.9 m/s | 5.4 |
| 2012 ❄️ | 31.2°C | 26.8°C | 22.4°C | 33.1°C | 18.1°C | 92 mm | 79% | 1.8 m/s | 5 |
| 2011 | 31.4°C | 27.3°C | 23.2°C | 33.1°C | 19.8°C | 166 mm | 81% | 2.1 m/s | 5.1 |
| 2010 | 30.8°C | 27.0°C | 23.3°C | 32.6°C | 17.8°C | 151 mm | 81% | 1.7 m/s | 4.4 |
| 2009 | 36.2°C | 29.9°C | 23.5°C | 39.4°C | 21.1°C | 98 mm | 61% | 2 m/s | 5.6 |
| 2008 | 34.3°C | 29.0°C | 23.7°C | 38.9°C | 20.3°C | 110 mm | 68% | 1.8 m/s | 5.3 |
| 2007 | 35.7°C | 30.2°C | 24.8°C | 38.7°C | 21.3°C | 63 mm | 62% | 1.6 m/s | 5.2 |
| 2006 | 36.3°C | 30.4°C | 24.5°C | 38.6°C | 21.4°C | 58 mm | 58% | 2 m/s | 5.6 |
| 2005 | 35.6°C | 30.2°C | 24.7°C | 41.3°C | 20.8°C | 107 mm | 61% | 2.6 m/s | 4.9 |
| 2004 | 35.8°C | 29.4°C | 23.0°C | 38.4°C | 20.9°C | 36 mm | 61% | 2 m/s | 5.7 |
| 2003 | 34.2°C | 29.2°C | 24.2°C | 37.7°C | 21.4°C | 78 mm | 70% | 1.5 m/s | 4.8 |
| 2002 | 36.1°C | 29.7°C | 23.3°C | 38.4°C | 20.9°C | 100 mm | 57% | 1.9 m/s | 5.4 |
| 2001 | 38.8°C | 31.7°C | 24.7°C | 40.3°C | 21.7°C | 23 mm | 43% | 1.9 m/s | 5.8 |
| 2000 | 38.8°C | 31.8°C | 24.9°C | 40.6°C | 21.4°C | 23 mm | 44% | 2 m/s | 5.5 |
| 1999 | 37.1°C | 31.4°C | 25.7°C | 41.4°C | 23.8°C | 56 mm | 57% | 1.8 m/s | 5.1 |
| 1998 | 34.3°C | 29.6°C | 24.8°C | 39.4°C | 23.0°C | 164 mm | 70% | 1.9 m/s | 5 |
| 1997 | 36.4°C | 30.1°C | 23.9°C | 39.5°C | 21.8°C | 47 mm | 58% | 2.1 m/s | 5.2 |
| 1996 | 32.5°C | 27.4°C | 22.3°C | 36.2°C | 19.4°C | 149 mm | 75% | 1.9 m/s | 5.1 |
| 1995 | 32.3°C | 27.2°C | 22.1°C | 35.4°C | 18.1°C | 112 mm | 74% | 1.7 m/s | 5.5 |
| 1994 | 32.4°C | 27.1°C | 21.8°C | 34.5°C | 17.1°C | 51 mm | 71% | 2.2 m/s | 5.7 |
| 1993 | 33.2°C | 28.5°C | 23.8°C | 37.7°C | 21.5°C | 194 mm | 74% | 1.7 m/s | 5.2 |
| 1992 | 32.9°C | 27.6°C | 22.2°C | 35.9°C | 18.8°C | 122 mm | 70% | 2.4 m/s | 5.1 |
| 1991 | 33.3°C | 27.7°C | 22.1°C | 35.2°C | 18.7°C | 110 mm | 70% | 2.2 m/s | 5.6 |
| 1990 | 32.6°C | 28.3°C | 23.9°C | 34.8°C | 21.8°C | 161 mm | 77% | 1.9 m/s | 4.8 |
| 1989 | 36.4°C | 30.1°C | 23.7°C | 39.2°C | 19.7°C | 58 mm | 54% | 2.1 m/s | 5.7 |
| 1988 | 35.3°C | 29.7°C | 24.0°C | 39.0°C | 19.5°C | 67 mm | 69% | 2.4 m/s | 5.6 |
| 1987 🔥 | 39.6°C | 32.2°C | 24.8°C | 41.8°C | 21.5°C | 38 mm | 42% | 2.1 m/s | 5.7 |
| 1986 | 37.6°C | 30.8°C | 24.0°C | 40.6°C | 21.4°C | 35 mm | 47% | 2.1 m/s | 5.3 |
| 1985 | 35.0°C | 29.0°C | 23.1°C | 38.6°C | 20.5°C | 49 mm | 63% | 2.4 m/s | 5.7 |
| 1984 | 32.5°C | 27.5°C | 22.6°C | 35.7°C | 19.1°C | 115 mm | 70% | 1.7 m/s | 5.5 |
| 1983 | 33.7°C | 29.0°C | 24.3°C | 36.4°C | 22.2°C | 90 mm | 74% | 1.7 m/s | — |
| 1982 | 35.3°C | 28.4°C | 21.5°C | 37.4°C | 17.3°C | 4 mm | 60% | 2.2 m/s | — |
| 1981 | 36.9°C | 30.5°C | 24.2°C | 39.7°C | 22.6°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 34.6°C with lows near 23.7°C (mean 29.2°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 0.3°C — but days and nights have moved in opposite directions. Overnight lows rose from 23.1°C to 24.4°C while daytime highs eased from 34.7°C to 32.8°C, narrowing the gap between day and night.
September is one of the warmer months of the year in Alwar and a relatively wet time of year, so plan for around 34.6°C daytime highs and 23.7°C at night.
Not quite — September is the 7th coolest month in Alwar, averaging 29.2°C.
For September in Alwar, pack light, breathable clothing and sun protection, with typical highs of 34.6°C and lows of 23.7°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.
