September is one of the warmer months of the year in Karnal, with average highs near 34°C and lows around 23.3°C (mean 28.7°C). It is a relatively wet time of year, averaging 115 mm of rainfall and 67% relative humidity across the period.
September is one of the warmer months of the year in Karnal. Across 45 years of records, the warmest September in Karnal was 1987 — when the month averaged 32.3°C — while the coldest was 1994 at 26.2°C. Typical September days reach 34°C with nights near 23.3°C. The long-term trend is cooling, about 0.3°C per decade.
September is a relatively wet time of year in Karnal, averaging 115 mm of rainfall. The wettest September on record was 2022 with 296 mm, while the driest was 1982 at 3 mm.
Relative humidity in Karnal during September averages 67%. The most humid September was 2021 at 85%, and the least humid was 1987 at 39%.
September receives about 5.3 kWh/m²/day of solar energy in Karnal. The sunniest September was 1987 at 6.1 kWh/m²/day, and the cloudiest was 2021 at 4.5.
Average wind speed in Karnal during September is 1.5 m/s. The windiest Septembers were 1986, 2012 and 2014 at 1.9 m/s, while the calmest was 2003 at 1.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 29.5°C | 28.3°C | 29.1°C | 28.1°C | 28.2°C | -1.3°C |
| Avg High | 35.9°C | 33.5°C | 34.7°C | 33.2°C | 32.5°C | -3.4°C |
| Avg Low | 23.2°C | 23.1°C | 23.4°C | 23.0°C | 23.9°C | +0.7°C |
| Avg Rain | 74 mm | 116 mm | 104 mm | 134 mm | 160 mm | +86 mm |
September temperatures in Karnal have fallen by about 1°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 14.3°C (1994) to a record high of 41.8°C (1987).
Rainfall in September is a relatively wet time of year, averaging 115 mm, with a wettest year of 296 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.7°C per decade while lows rose 0.1°C per decade, narrowing the gap between day and night.
A good time to visit Karnal
September is a good time to visit Karnal, with days averaging 34°C and nights around 23.3°C (mean 28.7°C, warmer than Karnal'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 | 31.7°C | 27.5°C | 23.3°C | 33.8°C | 20.1°C | 143 mm | 82% | 1.8 m/s | 5 |
| 2024 | 31.8°C | 28.1°C | 24.5°C | 34.6°C | 22.3°C | 186 mm | 83% | 1.3 m/s | 4.6 |
| 2023 | 33.7°C | 28.8°C | 23.8°C | 36.6°C | 19.1°C | 73 mm | 75% | 1.6 m/s | 5.4 |
| 2022 🌧️ | 33.0°C | 28.6°C | 24.2°C | 35.8°C | 21.6°C | 296 mm | 76% | 1.5 m/s | 5 |
| 2021 | 30.7°C | 27.1°C | 23.6°C | 33.0°C | 21.9°C | 248 mm | 85% | 1.5 m/s | 4.5 |
| 2020 | 33.9°C | 28.8°C | 23.8°C | 36.1°C | 19.7°C | 17 mm | 69% | 1.4 m/s | 5.5 |
| 2019 | 34.0°C | 29.5°C | 24.9°C | 37.2°C | 21.9°C | 88 mm | 72% | 1.3 m/s | 4.9 |
| 2018 | 31.0°C | 26.8°C | 22.6°C | 33.3°C | 19.0°C | 215 mm | 79% | 1.6 m/s | 4.8 |
| 2017 | 34.3°C | 28.4°C | 22.6°C | 37.2°C | 18.1°C | 142 mm | 63% | 1.5 m/s | 5.2 |
| 2016 | 35.7°C | 29.5°C | 23.3°C | 37.3°C | 21.7°C | 43 mm | 57% | 1.5 m/s | 5.5 |
| 2015 | 35.9°C | 29.1°C | 22.3°C | 38.3°C | 19.2°C | 42 mm | 52% | 1.8 m/s | 5.6 |
| 2014 | 34.9°C | 29.1°C | 23.2°C | 37.6°C | 20.3°C | 104 mm | 62% | 1.9 m/s | 5.3 |
| 2013 | 32.3°C | 27.3°C | 22.4°C | 34.1°C | 20.4°C | 91 mm | 74% | 1.3 m/s | 5.3 |
| 2012 | 32.3°C | 27.3°C | 22.3°C | 34.3°C | 17.3°C | 107 mm | 76% | 1.9 m/s | 5.2 |
| 2011 | 31.0°C | 27.2°C | 23.3°C | 33.3°C | 19.2°C | 235 mm | 84% | 1.6 m/s | 5 |
| 2010 | 30.1°C | 26.5°C | 22.8°C | 32.6°C | 17.3°C | 272 mm | 84% | 1.5 m/s | 4.6 |
| 2009 | 33.3°C | 28.1°C | 23.0°C | 35.3°C | 20.5°C | 181 mm | 70% | 1.3 m/s | 5.2 |
| 2008 | 31.8°C | 27.0°C | 22.2°C | 35.2°C | 18.5°C | 174 mm | 78% | 1.4 m/s | 5.5 |
| 2007 | 35.3°C | 29.9°C | 24.4°C | 37.3°C | 20.8°C | 72 mm | 63% | 1.3 m/s | 5.2 |
| 2006 | 35.4°C | 29.6°C | 23.8°C | 37.3°C | 20.4°C | 75 mm | 62% | 1.7 m/s | 5.6 |
| 2005 | 33.5°C | 28.7°C | 23.9°C | 40.4°C | 20.4°C | 200 mm | 71% | 1.8 m/s | 4.7 |
| 2004 | 36.5°C | 29.7°C | 22.9°C | 39.4°C | 20.7°C | 16 mm | 55% | 1.5 m/s | 5.6 |
| 2003 | 32.5°C | 28.0°C | 23.5°C | 34.6°C | 19.2°C | 97 mm | 76% | 1.1 m/s | 5.1 |
| 2002 | 34.0°C | 28.3°C | 22.7°C | 36.6°C | 19.7°C | 148 mm | 65% | 1.6 m/s | 5.1 |
| 2001 | 37.2°C | 30.3°C | 23.4°C | 38.4°C | 19.2°C | 37 mm | 50% | 1.5 m/s | 5.9 |
| 2000 | 37.8°C | 30.9°C | 23.9°C | 39.8°C | 19.6°C | 45 mm | 50% | 1.5 m/s | 5.8 |
| 1999 | 37.5°C | 31.5°C | 25.6°C | 41.5°C | 22.9°C | 73 mm | 55% | 1.7 m/s | 5.4 |
| 1998 | 33.7°C | 28.9°C | 24.1°C | 37.6°C | 20.8°C | 160 mm | 74% | 1.6 m/s | 4.9 |
| 1997 | 35.0°C | 29.1°C | 23.2°C | 37.5°C | 21.3°C | 41 mm | 61% | 1.3 m/s | 5.7 |
| 1996 | 32.3°C | 27.5°C | 22.7°C | 35.1°C | 19.6°C | 139 mm | 75% | 1.5 m/s | 5.5 |
| 1995 | 32.0°C | 27.1°C | 22.2°C | 33.7°C | 19.1°C | 141 mm | 74% | 1.3 m/s | 5.8 |
| 1994 ❄️ | 31.4°C | 26.2°C | 20.9°C | 33.2°C | 14.3°C | 38 mm | 75% | 1.7 m/s | 5.9 |
| 1993 | 33.2°C | 28.2°C | 23.2°C | 36.8°C | 20.8°C | 167 mm | 71% | 1.4 m/s | 5.2 |
| 1992 | 34.3°C | 28.6°C | 22.9°C | 37.0°C | 19.3°C | 81 mm | 62% | 1.7 m/s | 5.5 |
| 1991 | 33.5°C | 28.0°C | 22.4°C | 35.0°C | 19.0°C | 89 mm | 68% | 1.3 m/s | 6 |
| 1990 | 32.4°C | 28.1°C | 23.8°C | 37.0°C | 21.5°C | 233 mm | 77% | 1.4 m/s | 5 |
| 1989 | 36.3°C | 29.9°C | 23.5°C | 38.8°C | 21.4°C | 71 mm | 55% | 1.3 m/s | 5.5 |
| 1988 | 33.3°C | 28.3°C | 23.3°C | 37.2°C | 19.1°C | 186 mm | 73% | 1.8 m/s | 5.4 |
| 1987 🔥 | 40.0°C | 32.3°C | 24.6°C | 41.8°C | 22.3°C | 22 mm | 39% | 1.6 m/s | 6.1 |
| 1986 | 37.6°C | 30.3°C | 23.0°C | 40.7°C | 20.4°C | 63 mm | 43% | 1.9 m/s | 5.8 |
| 1985 | 34.7°C | 28.8°C | 22.8°C | 37.6°C | 18.3°C | 71 mm | 64% | 1.7 m/s | 5.8 |
| 1984 | 31.3°C | 26.5°C | 21.7°C | 34.1°C | 17.5°C | 103 mm | 75% | 1.5 m/s | 5.7 |
| 1983 | 35.3°C | 29.8°C | 24.2°C | 38.1°C | 20.5°C | 71 mm | 66% | 1.4 m/s | — |
| 1982 | 37.6°C | 29.6°C | 21.6°C | 39.1°C | 17.3°C | 3 mm | 46% | 1.8 m/s | — |
| 1981 | 36.9°C | 30.4°C | 24.0°C | 39.3°C | 21.0°C | 77 mm | 55% | 1.7 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 34°C with lows near 23.3°C (mean 28.7°C), based on 45 years of NASA POWER data.
September averages 115 mm of rainfall in Karnal, a relatively wet time of year. The wettest on record was 296 mm in 2022.
The hottest September reached 41.8°C in 1987. The coldest dipped to 14.3°C in 1994.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have fallen by about 1°C — but days and nights have moved in opposite directions. Overnight lows rose from 22.9°C to 23.9°C while daytime highs eased from 35.2°C to 32.2°C, narrowing the gap between day and night.
September is one of the warmer months of the year in Karnal and a relatively wet time of year, so plan for around 34°C daytime highs and 23.3°C at night.
Not quite — September is the 7th coolest month in Karnal, averaging 28.7°C.
For September in Karnal, pack light, breathable clothing and sun protection, with typical highs of 34°C and lows of 23.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 67% — moderately humid.
Average wind speed in September is 1.5 m/s. The windiest September on record averaged 1.9 m/s (1986).
The wettest September on record was 2022 with 296 mm. On average, September sees 115 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 Karnal 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.
