September is one of the warmer months of the year in Udham Singh Nagar, with average highs near 33.8°C and lows around 20.7°C (mean 27.3°C). It is a relatively wet time of year, averaging 171 mm of rainfall and 77% relative humidity across the period.
September is one of the warmer months of the year in Udham Singh Nagar. Across 45 years of records, the warmest September in Udham Singh Nagar was 1987 — when the month averaged 30°C — while the coldest was 1984 at 24.6°C. Typical September days reach 33.8°C with nights near 20.7°C. The long-term September temperature trend is broadly flat.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 27.6°C | 27.2°C | 26.9°C | 26.8°C | 28.3°C | +0.7°C |
| Avg High | 34.8°C | 33.7°C | 33.3°C | 33.0°C | 34.4°C | -0.4°C |
| Avg Low | 20.4°C | 20.6°C | 20.4°C | 20.7°C | 22.1°C | +1.7°C |
| Avg Rain | 131 mm | 140 mm | 200 mm | 200 mm | 183 mm | +52 mm |
September temperatures in Udham Singh Nagar have risen by about 1.7°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 17.1°C (1994) to a record high of 39°C (1987).
Rainfall in September is a relatively wet time of year, averaging 171 mm, with a wettest year of 533 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.2°C per decade while lows rose 0.4°C per decade, narrowing the gap between day and night.
A good time to visit Udham Singh Nagar
September is a good time to visit Udham Singh Nagar, with days averaging 33.8°C and nights around 20.7°C (mean 27.3°C, warmer than Udham Singh Nagar's yearly average) and higher rainfall. November and March are marginally more temperate, but September still suits most travellers.
| Year | High | Low | Avg | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|
| 2025 | 33.0°C | 22.8°C | 27.9°C | 167 mm | 87% | 1.5 m/s | 4.6 |
| 2024 | 33.0°C | 22.9°C | 28.0°C | 294 mm | 86% | 1.5 m/s | 4.1 |
| 2023 | 34.2°C | 21.2°C | 27.7°C | 221 mm | 83% | 1.3 m/s | 4.5 |
| 2022 | 37.6°C | 21.3°C | 29.5°C | 274 mm | 76% | 1.8 m/s | 4.2 |
| 2021 | 32.7°C | 22.4°C | 27.6°C | 113 mm | 83% | 1.3 m/s | 4.8 |
| 2020 | 36.1°C | 21.7°C | 28.9°C | 28 mm | 72% | 1.3 m/s | 5 |
| 2019 | 33.1°C | 21.4°C | 27.3°C | 135 mm | 84% | 1.4 m/s | 4.2 |
| 2018 | 31.1°C | 20.0°C | 25.5°C | 163 mm | 87% | 1.7 m/s | 4.6 |
| 2017 | 34.7°C | 21.7°C | 28.2°C | 243 mm | 79% | 1.5 m/s | 4.8 |
| 2016 | 33.0°C | 21.7°C | 27.4°C | 113 mm | 79% | 1.5 m/s | 5.1 |
| 2015 | 35.4°C | 19.6°C | 27.5°C | 104 mm | 71% | 1.6 m/s | 5.5 |
| 2014 | 35.4°C | 21.0°C | 28.2°C | 115 mm | 70% | 1.8 m/s | 5.3 |
| 2013 | 32.1°C | 21.9°C | 27.0°C | 127 mm | 84% | 1.4 m/s | 5.2 |
| 2012 | 32.3°C | 18.9°C | 25.6°C | 208 mm | 85% | 1.7 m/s | 4.8 |
| 2011 | 31.6°C | 20.5°C | 26.0°C | 264 mm | 87% | 1.5 m/s | 5.1 |
| 2010 🌧️ | 30.9°C | 19.9°C | 25.4°C | 533 mm | 88% | 1.5 m/s | 4 |
| 2009 | 31.9°C | 22.0°C | 26.9°C | 230 mm | 83% | 1.3 m/s | 4.7 |
| 2008 | 31.6°C | 20.1°C | 25.9°C | 281 mm | 82% | 1.3 m/s | 5 |
| 2007 | 33.0°C | 21.2°C | 27.1°C | 203 mm | 82% | 1.4 m/s | 4.9 |
| 2006 | 34.3°C | 20.0°C | 27.1°C | 120 mm | 73% | 1.5 m/s | 5.4 |
| 2005 | 33.8°C | 21.4°C | 27.6°C | 414 mm | 81% | 1.8 m/s | 4.6 |
| 2004 | 33.8°C | 19.8°C | 26.8°C | 60 mm | 72% | 1.5 m/s | 5.1 |
| 2003 | 32.2°C | 21.3°C | 26.8°C | 351 mm | 84% | 1.2 m/s | 3.6 |
| 2002 | 33.8°C | 19.0°C | 26.4°C | 253 mm | 77% | 1.4 m/s | 4.1 |
| 2001 | 35.8°C | 20.4°C | 28.1°C | 32 mm | 62% | 1.3 m/s | 5.5 |
| 2000 | 32.9°C | 19.2°C | 26.1°C | 52 mm | 75% | 1.3 m/s | 4.9 |
| 1999 | 34.3°C | 22.3°C | 28.3°C | 205 mm | 78% | 1.2 m/s | 3.9 |
| 1998 | 33.9°C | 22.1°C | 28.0°C | 132 mm | 80% | 1.3 m/s | 4.7 |
| 1997 | 36.1°C | 20.1°C | 28.1°C | 41 mm | 62% | 1.5 m/s | 5 |
| 1996 | 31.8°C | 21.3°C | 26.5°C | 232 mm | 83% | 1.5 m/s | 4.9 |
| 1995 | 34.1°C | 20.9°C | 27.5°C | 136 mm | 79% | 1.5 m/s | 5.1 |
| 1994 | 32.8°C | 17.1°C | 25.0°C | 23 mm | 78% | 1.4 m/s | 5.7 |
| 1993 | 35.1°C | 22.2°C | 28.6°C | 156 mm | 74% | 1.8 m/s | 4.5 |
| 1992 | 35.2°C | 20.2°C | 27.7°C | 101 mm | 67% | 1.5 m/s | 5 |
| 1991 | 31.8°C | 18.3°C | 25.1°C | 131 mm | 79% | 1.4 m/s | 5.2 |
| 1990 | 32.3°C | 21.2°C | 26.8°C | 243 mm | 84% | 1.4 m/s | 4.6 |
| 1989 | 36.6°C | 21.7°C | 29.1°C | 106 mm | 66% | 1.5 m/s | 4.9 |
| 1988 | 33.2°C | 21.9°C | 27.5°C | 119 mm | 81% | 1.5 m/s | 5.3 |
| 1987 🔥 | 39.0°C | 21.0°C | 30.0°C | 58 mm | 52% | 1.5 m/s | 5.4 |
| 1986 | 38.2°C | 21.0°C | 29.6°C | 91 mm | 53% | 1.6 m/s | 5.4 |
| 1985 | 33.6°C | 20.4°C | 27.0°C | 257 mm | 80% | 1.5 m/s | 5 |
| 1984 ❄️ | 31.1°C | 18.0°C | 24.6°C | 143 mm | 81% | 1.6 m/s | 5.5 |
| 1983 | 31.8°C | 21.8°C | 26.8°C | 275 mm | 83% | 1.3 m/s | — |
| 1982 | 33.5°C | 17.6°C | 25.5°C | 57 mm | 70% | 1.3 m/s | — |
| 1981 | 35.8°C | 20.6°C | 28.2°C | 75 mm | 69% | 1.5 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 33.8°C with lows near 20.7°C (mean 27.3°C), based on 45 years of NASA POWER data.
September averages 171 mm of rainfall in Udham Singh Nagar, a relatively wet time of year. The wettest on record was 533 mm in 2010.
The hottest September reached 39°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 risen by about 1.7°C. Daytime highs moved from 33.2°C to 34.1°C and overnight lows from 19.7°C to 22.1°C over the same span.
September is one of the warmer months of the year in Udham Singh Nagar and a relatively wet time of year, so plan for around 33.8°C daytime highs and 20.7°C at night.
Not quite — September is the 7th coolest month in Udham Singh Nagar, averaging 27.3°C.
For September in Udham Singh Nagar, pack light, breathable clothing and sun protection, with typical highs of 33.8°C and lows of 20.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 77% — quite humid.
Average wind speed in September is 1.5 m/s. The windiest September on record averaged 1.8 m/s (1993).
The wettest September on record was 2010 with 533 mm. On average, September sees 171 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 Udham Singh Nagar 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.
