September is one of the warmer months of the year in Shimla, with average highs near 31°C and lows around 17.5°C (mean 24.3°C). It is a relatively wet time of year, averaging 145 mm of rainfall and 71% relative humidity across the period.
September is one of the warmer months of the year in Shimla. Across 45 years of records, the warmest September in Shimla was 1999 — when the month averaged 26.9°C — while the coldest was 1994 at 21.5°C. Typical September days reach 31°C with nights near 17.5°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 | 25.2°C | 23.8°C | 24.0°C | 23.9°C | 24.4°C | -0.8°C |
| Avg High | 33.0°C | 30.7°C | 31.3°C | 29.9°C | 30.0°C | -3°C |
| Avg Low | 17.3°C | 16.9°C | 16.8°C | 18.0°C | 18.8°C | +1.5°C |
| Avg Rain | 92 mm | 140 mm | 133 mm | 189 mm | 180 mm | +88 mm |
September temperatures in Shimla have stayed relatively stable across the record.
September has ranged from a record low of 13.8°C (1994) to a record high of 35.9°C (1987).
Rainfall in September is a relatively wet time of year, averaging 145 mm, with a wettest year of 355 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.7°C per decade while lows rose 0.4°C per decade, narrowing the gap between day and night.
A good time to visit Shimla
September is a good time to visit Shimla, with days averaging 31°C and nights around 17.5°C (mean 24.3°C, warmer than Shimla's yearly average) and higher rainfall. October and April are marginally more temperate, but September still suits most travellers.
| Year | High | Low | Avg | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|
| 2025 | 29.6°C | 20.1°C | 24.8°C | 291 mm | 88% | 1.8 m/s | 4.4 |
| 2024 | 30.5°C | 19.3°C | 24.9°C | 205 mm | 85% | 1.3 m/s | 4.4 |
| 2023 | 30.0°C | 18.4°C | 24.2°C | 71 mm | 83% | 1.3 m/s | 5 |
| 2022 | 29.0°C | 18.2°C | 23.6°C | 255 mm | 86% | 1.4 m/s | 4.4 |
| 2021 | 29.4°C | 20.1°C | 24.7°C | 234 mm | 84% | 1.2 m/s | 4.3 |
| 2020 | 31.2°C | 16.8°C | 24.0°C | 23 mm | 74% | 1.6 m/s | 5.8 |
| 2019 | 29.7°C | 18.6°C | 24.1°C | 143 mm | 81% | 1.3 m/s | 4.8 |
| 2018 | 29.8°C | 17.4°C | 23.6°C | 303 mm | 83% | 1.4 m/s | 4.5 |
| 2017 | 30.9°C | 18.2°C | 24.5°C | 152 mm | 75% | 1.5 m/s | 5 |
| 2016 | 30.4°C | 19.4°C | 24.9°C | 48 mm | 72% | 1.5 m/s | 5.6 |
| 2015 | 31.7°C | 16.9°C | 24.3°C | 80 mm | 64% | 1.6 m/s | 5.6 |
| 2014 | 29.9°C | 18.0°C | 24.0°C | 265 mm | 80% | 1.6 m/s | 4.9 |
| 2013 | 28.4°C | 18.7°C | 23.6°C | 83 mm | 78% | 1.4 m/s | 5 |
| 2012 | 30.1°C | 18.6°C | 24.3°C | 193 mm | 78% | 1.6 m/s | 4.7 |
| 2011 | 29.3°C | 17.6°C | 23.4°C | 272 mm | 83% | 1.3 m/s | 4.9 |
| 2010 🌧️ | 29.0°C | 16.3°C | 22.6°C | 355 mm | 83% | 1.3 m/s | 4.1 |
| 2009 | 30.9°C | 17.8°C | 24.3°C | 177 mm | 71% | 1.4 m/s | 4.9 |
| 2008 | 30.2°C | 16.1°C | 23.1°C | 251 mm | 79% | 1.4 m/s | 5.1 |
| 2007 | 30.3°C | 16.5°C | 23.4°C | 70 mm | 69% | 1.2 m/s | 4.6 |
| 2006 | 31.2°C | 16.2°C | 23.7°C | 96 mm | 72% | 1.6 m/s | 5.3 |
| 2005 | 33.7°C | 17.8°C | 25.8°C | 217 mm | 71% | 1.2 m/s | 4.3 |
| 2004 | 31.0°C | 17.5°C | 24.2°C | 22 mm | 61% | 1.4 m/s | 5.5 |
| 2003 | 29.4°C | 16.5°C | 22.9°C | 158 mm | 76% | 1.2 m/s | 4.5 |
| 2002 | 30.7°C | 16.2°C | 23.5°C | 197 mm | 68% | 1.4 m/s | 4.6 |
| 2001 | 32.5°C | 16.6°C | 24.5°C | 45 mm | 56% | 1.5 m/s | 5.8 |
| 2000 | 32.8°C | 16.5°C | 24.7°C | 94 mm | 56% | 1.5 m/s | 5 |
| 1999 🔥 | 34.5°C | 19.2°C | 26.9°C | 110 mm | 57% | 1.4 m/s | 5 |
| 1998 | 30.9°C | 19.5°C | 25.2°C | 114 mm | 70% | 1.2 m/s | 4.3 |
| 1997 | 30.6°C | 15.4°C | 23.0°C | 41 mm | 67% | 1.4 m/s | 4.7 |
| 1996 | 29.0°C | 17.6°C | 23.3°C | 169 mm | 75% | 1.5 m/s | 4.7 |
| 1995 | 30.9°C | 17.7°C | 24.3°C | 136 mm | 76% | 1.5 m/s | 4.9 |
| 1994 ❄️ | 29.3°C | 13.8°C | 21.5°C | 69 mm | 74% | 1.4 m/s | 5.3 |
| 1993 | 30.1°C | 17.1°C | 23.6°C | 210 mm | 70% | 1.3 m/s | 4.6 |
| 1992 | 30.4°C | 16.1°C | 23.3°C | 118 mm | 72% | 1.5 m/s | 4.4 |
| 1991 | 30.3°C | 15.3°C | 22.8°C | 143 mm | 68% | 1.5 m/s | 5.1 |
| 1990 | 31.2°C | 17.5°C | 24.3°C | 289 mm | 78% | 1.4 m/s | 4.1 |
| 1989 | 33.0°C | 18.0°C | 25.5°C | 88 mm | 55% | 1.5 m/s | 5.3 |
| 1988 | 34.1°C | 17.6°C | 25.9°C | 266 mm | 64% | 1.7 m/s | 4.5 |
| 1987 | 35.9°C | 17.4°C | 26.6°C | 8 mm | 39% | 1.8 m/s | 5.6 |
| 1986 | 34.5°C | 17.1°C | 25.8°C | 57 mm | 45% | 1.7 m/s | 4.8 |
| 1985 | 30.4°C | 17.2°C | 23.8°C | 63 mm | 67% | 1.4 m/s | 4.5 |
| 1984 | 29.4°C | 15.3°C | 22.4°C | 128 mm | 75% | 1.4 m/s | 5 |
| 1983 | 32.8°C | 19.4°C | 26.1°C | 98 mm | 61% | 1.6 m/s | — |
| 1982 | 35.1°C | 16.1°C | 25.6°C | 8 mm | 39% | 1.8 m/s | — |
| 1981 | 31.6°C | 18.0°C | 24.8°C | 114 mm | 66% | 1.5 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 31°C with lows near 17.5°C (mean 24.3°C), based on 45 years of NASA POWER data.
September averages 145 mm of rainfall in Shimla, a relatively wet time of year. The wettest on record was 355 mm in 2010.
The hottest September reached 35.9°C in 1987. The coldest dipped to 13.8°C in 1994.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have fallen by about 0.1°C. Daytime highs moved from 31.9°C to 29.7°C and overnight lows from 17.2°C to 19.2°C over the same span.
September is one of the warmer months of the year in Shimla and a relatively wet time of year, so plan for around 31°C daytime highs and 17.5°C at night.
Not quite — September is the 7th coolest month in Shimla, averaging 24.3°C.
For September in Shimla, pack light, breathable clothing and sun protection, with typical highs of 31°C and lows of 17.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 71% — moderately humid.
Average wind speed in September is 1.5 m/s. The windiest September on record averaged 1.8 m/s (1982).
The wettest September on record was 2010 with 355 mm. On average, September sees 145 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 Shimla 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.
