September is one of the warmer months of the year in Sonipat, with average highs near 34.5°C and lows around 23.5°C (mean 29°C). It is a relatively wet time of year, averaging 109 mm of rainfall and 66% relative humidity across the period.
September is one of the warmer months of the year in Sonipat. Across 45 years of records, the warmest September in Sonipat was 1987 — when the month averaged 32.2°C — while the coldest was 1984 at 26.5°C. Typical September days reach 34.5°C with nights near 23.5°C. The long-term trend is cooling, about 0.2°C per decade.
September is a relatively wet time of year in Sonipat, averaging 109 mm of rainfall. The wettest September on record was 2021 with 263 mm, while the driest was 1982 at 2 mm.
Relative humidity in Sonipat during September averages 66%. The most humid September was 2021 at 86%, and the least humid was 1987 at 40%.
September receives about 5.1 kWh/m²/day of solar energy in Sonipat. The sunniest Septembers were 1994, 2001 and 2015, among others at 5.8 kWh/m²/day, and the cloudiest was 2010 at 4.
Average wind speed in Sonipat during September is 1.7 m/s. The windiest Septembers were 1986 and 2005 at 2.1 m/s, while the calmest was 2003 at 1.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 29.8°C | 28.6°C | 29.5°C | 28.4°C | 28.7°C | -1.1°C |
| Avg High | 36.1°C | 33.9°C | 35.3°C | 33.6°C | 33.2°C | -2.9°C |
| Avg Low | 23.5°C | 23.3°C | 23.7°C | 23.2°C | 24.2°C | +0.7°C |
| Avg Rain | 74 mm | 116 mm | 100 mm | 118 mm | 152 mm | +78 mm |
September temperatures in Sonipat have fallen by about 0.7°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 15.1°C (1994) to a record high of 42.1°C (1999).
Rainfall in September is a relatively wet time of year, averaging 109 mm, with a wettest year of 263 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.6°C per decade while lows rose 0.1°C per decade, narrowing the gap between day and night.
A good time to visit Sonipat
September is a good time to visit Sonipat, with days averaging 34.5°C and nights around 23.5°C (mean 29°C, warmer than Sonipat'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 | 32.1°C | 27.7°C | 23.3°C | 33.8°C | 19.8°C | 132 mm | 81% | 1.9 m/s | 4.8 |
| 2024 | 32.0°C | 28.3°C | 24.6°C | 34.6°C | 22.2°C | 189 mm | 82% | 1.4 m/s | 4.1 |
| 2023 | 35.0°C | 29.7°C | 24.3°C | 38.1°C | 19.4°C | 70 mm | 70% | 1.8 m/s | 5 |
| 2022 | 34.3°C | 29.7°C | 25.0°C | 37.8°C | 22.2°C | 240 mm | 70% | 1.7 m/s | 4.5 |
| 2021 🌧️ | 30.8°C | 27.3°C | 23.8°C | 33.3°C | 21.7°C | 263 mm | 86% | 1.8 m/s | 4.2 |
| 2020 | 34.7°C | 29.5°C | 24.4°C | 36.8°C | 20.0°C | 17 mm | 65% | 1.4 m/s | 5.3 |
| 2019 | 34.8°C | 30.1°C | 25.3°C | 38.5°C | 22.8°C | 66 mm | 69% | 1.5 m/s | 4.3 |
| 2018 | 31.6°C | 27.2°C | 22.8°C | 33.8°C | 19.0°C | 199 mm | 77% | 1.7 m/s | 4.5 |
| 2017 | 35.0°C | 29.0°C | 22.9°C | 37.8°C | 18.0°C | 126 mm | 60% | 1.5 m/s | 4.9 |
| 2016 | 35.4°C | 29.3°C | 23.3°C | 37.4°C | 21.8°C | 38 mm | 59% | 1.5 m/s | 5.4 |
| 2015 | 36.5°C | 29.6°C | 22.6°C | 38.9°C | 19.1°C | 31 mm | 49% | 2 m/s | 5.8 |
| 2014 | 35.7°C | 29.5°C | 23.4°C | 38.2°C | 20.9°C | 76 mm | 59% | 2 m/s | 5.4 |
| 2013 | 32.5°C | 27.5°C | 22.6°C | 34.5°C | 20.4°C | 95 mm | 73% | 1.5 m/s | 5.4 |
| 2012 | 32.5°C | 27.4°C | 22.4°C | 34.6°C | 17.8°C | 77 mm | 75% | 1.9 m/s | 5.1 |
| 2011 | 31.3°C | 27.4°C | 23.5°C | 33.6°C | 18.9°C | 222 mm | 82% | 1.7 m/s | 5.1 |
| 2010 | 30.4°C | 26.7°C | 23.1°C | 32.8°C | 17.3°C | 250 mm | 84% | 1.5 m/s | 4 |
| 2009 | 33.6°C | 28.3°C | 23.0°C | 35.7°C | 20.1°C | 181 mm | 70% | 1.5 m/s | 5.2 |
| 2008 | 32.6°C | 27.6°C | 22.6°C | 36.3°C | 18.9°C | 152 mm | 76% | 1.5 m/s | 5.3 |
| 2007 | 35.9°C | 30.4°C | 24.9°C | 38.7°C | 21.3°C | 74 mm | 61% | 1.4 m/s | 5 |
| 2006 | 35.4°C | 29.6°C | 23.9°C | 37.4°C | 20.3°C | 90 mm | 62% | 1.7 m/s | 5.5 |
| 2005 | 33.9°C | 29.0°C | 24.1°C | 41.0°C | 19.5°C | 201 mm | 69% | 2.1 m/s | 4.8 |
| 2004 | 37.2°C | 30.3°C | 23.3°C | 40.1°C | 21.1°C | 12 mm | 52% | 1.7 m/s | 5.6 |
| 2003 | 32.7°C | 28.2°C | 23.6°C | 35.1°C | 19.8°C | 76 mm | 76% | 1.2 m/s | 4.2 |
| 2002 | 34.6°C | 28.8°C | 22.9°C | 37.4°C | 19.5°C | 147 mm | 64% | 1.7 m/s | 4.7 |
| 2001 | 38.0°C | 31.0°C | 23.9°C | 39.3°C | 20.4°C | 35 mm | 47% | 1.7 m/s | 5.8 |
| 2000 | 38.6°C | 31.6°C | 24.6°C | 40.6°C | 20.1°C | 29 mm | 47% | 1.7 m/s | 5.4 |
| 1999 | 37.8°C | 31.9°C | 26.0°C | 42.1°C | 23.5°C | 65 mm | 54% | 1.9 m/s | 4.5 |
| 1998 | 34.0°C | 29.2°C | 24.5°C | 39.0°C | 21.3°C | 176 mm | 72% | 1.7 m/s | 4.9 |
| 1997 | 35.7°C | 29.6°C | 23.5°C | 38.1°C | 21.1°C | 48 mm | 59% | 1.7 m/s | 5.1 |
| 1996 | 32.8°C | 27.7°C | 22.7°C | 35.6°C | 19.0°C | 130 mm | 74% | 1.6 m/s | 5.2 |
| 1995 | 32.1°C | 27.2°C | 22.3°C | 34.0°C | 18.3°C | 154 mm | 74% | 1.4 m/s | 5.4 |
| 1994 | 32.0°C | 26.6°C | 21.1°C | 33.2°C | 15.1°C | 28 mm | 73% | 1.9 m/s | 5.8 |
| 1993 | 33.8°C | 28.7°C | 23.5°C | 37.5°C | 21.1°C | 164 mm | 71% | 1.6 m/s | 4.5 |
| 1992 | 34.8°C | 28.9°C | 23.1°C | 37.4°C | 19.5°C | 83 mm | 60% | 1.9 m/s | 5.2 |
| 1991 | 33.7°C | 28.0°C | 22.4°C | 35.2°C | 18.9°C | 91 mm | 69% | 1.6 m/s | 5.5 |
| 1990 | 32.4°C | 28.2°C | 24.0°C | 36.2°C | 22.1°C | 225 mm | 77% | 1.5 m/s | 4.7 |
| 1989 | 37.0°C | 30.5°C | 24.1°C | 39.8°C | 22.3°C | 75 mm | 52% | 1.5 m/s | 5.3 |
| 1988 | 33.6°C | 28.6°C | 23.6°C | 37.2°C | 19.9°C | 170 mm | 74% | 2 m/s | 5.4 |
| 1987 🔥 | 39.9°C | 32.2°C | 24.5°C | 41.8°C | 21.2°C | 26 mm | 40% | 1.7 m/s | 5.8 |
| 1986 | 38.2°C | 30.9°C | 23.5°C | 41.4°C | 20.9°C | 67 mm | 42% | 2.1 m/s | 5.5 |
| 1985 | 35.0°C | 29.0°C | 23.0°C | 38.0°C | 19.4°C | 61 mm | 62% | 1.9 m/s | 5.2 |
| 1984 ❄️ | 31.2°C | 26.5°C | 21.8°C | 33.9°C | 17.7°C | 108 mm | 75% | 1.6 m/s | 5.6 |
| 1983 | 35.3°C | 29.8°C | 24.4°C | 37.9°C | 21.4°C | 83 mm | 68% | 1.5 m/s | — |
| 1982 | 37.3°C | 29.5°C | 21.6°C | 39.0°C | 17.0°C | 2 mm | 48% | 2 m/s | — |
| 1981 | 37.7°C | 31.2°C | 24.6°C | 40.0°C | 21.8°C | 76 mm | 53% | 1.9 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 34.5°C with lows near 23.5°C (mean 29°C), based on 45 years of NASA POWER data.
September averages 109 mm of rainfall in Sonipat, a relatively wet time of year. The wettest on record was 263 mm in 2021.
The hottest September reached 42.1°C in 1999. The coldest dipped to 15.1°C in 1994.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have fallen by about 0.7°C — but days and nights have moved in opposite directions. Overnight lows rose from 23.1°C to 24.2°C while daytime highs eased from 35.3°C to 32.8°C, narrowing the gap between day and night.
September is one of the warmer months of the year in Sonipat and a relatively wet time of year, so plan for around 34.5°C daytime highs and 23.5°C at night.
Not quite — September is the 7th coolest month in Sonipat, averaging 29°C.
For September in Sonipat, pack light, breathable clothing and sun protection, with typical highs of 34.5°C and lows of 23.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 66% — moderately humid.
Average wind speed in September is 1.7 m/s. The windiest September on record averaged 2.1 m/s (1986).
The wettest September on record was 2021 with 263 mm. On average, September sees 109 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 Sonipat 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.
