Delhi in September
In September, Delhi has a daily high of 33.7 °C (92.7 °F) and a daily low of 24.2 °C (75.6 °F), as 1991-2020 model estimates; figures in brackets are converted. The daily high is a model estimate, adjusted against station records. There is no data for rain: Not published: the model failed our station test in tropical cities.
Last updated : back, with ERA5-Land model estimates.
Best time to visit Delhi: September misses our rule: days are 5.7 °C over our 28 °C (model estimates). Expect days that shorten by 49 min.
What September is like in Delhi
- Delhi's butterfly month opens at Asola Bhatti Wildlife Sanctuary in September and builds up to a Big Butterfly Count. Source: Conservation Education Centre Delhi (BNHS and Delhi Government), checked .
- White birds with long yellow beaks perch on half-sunk trees in the Yamuna near Nizamuddin Bridge in September. Source: The Delhi Walla, checked .
- Painted storks fly in to the National Zoological Park by September. They nest and breed by the zoo ponds from September into January. Source: National Zoological Park, New Delhi, checked .
Key figures
Weather in September, 1991-2020 model estimates
- Daily high
- 33.7 °C (92.7 °F)
- Daily low
- 24.2 °C (75.6 °F)
- Rain
- no data
- Sunshine
- no data
Model estimate 1991-2020, not a weather station: ERA5-Land model estimates (Copernicus), computed by City by Month for the grid cell nearest the city. Daily high: model estimate, adjusted against station records. Licence: CC BY 4.0. Checked . How we make and test model estimates
Model estimate for the ERA5-Land grid cell at 28.7° N, 77.2° E, 4 km from the city centre point.
How we define and convert these figures
Notes. Rain: Not published: the model failed our station test in tropical cities. Sunshine: Not in our ERA5-Land estimates.
Daylight on 15 September 2026
- Sunrise
- 06:06 local time
- Sunset
- 18:26 local time
- Day length
- 12 h 21 min
Day length 1-30 September: 12 h 44 min to 11 h 55 min, -49 min.
Source: NOAA Solar Calculator equations, checked .
Month by month
Each month: daily high in °C, 1991-2020 model estimates. Rain: no data.
ERA5-Land model estimates 1991-2020, as above, checked .
This month against the year
| Measure | September | Rank |
|---|---|---|
| Daily high | 33.7 °C | equal 5th warmest |
| Daily low | 24.2 °C | 5th warmest |
| Rain | no data | no data |
| Sunshine | no data | no data |
| Day length | 12 h 21 min | 6th longest |
Equal values share a rank. How we rank months
ERA5-Land model estimates 1991-2020, as above, checked .
Day length: NOAA solar equations, checked .
Public holidays this month
| Date | Holiday |
|---|---|
| Friday | Janmashtami (Vaishnva) |
September 2027: none.
Typed from the official lists for 2026 and 2027 and re-checked, .
Source: Official public holiday list (cdnbbsr.s3waas.gov.in), checked ; Official public holiday list (csir.res.in), checked .
Same month in 8 model-estimate cities
Delhi is warmer than 7 of our 8 model-estimate cities in September by mean daily high. How we rank cities
Closest high and low in September: Bangkok (1.3 °C apart), Mumbai (2.3), Lisbon (6.8).
| City | Gap from Delhi, °C | High, °C | Low, °C | Rain, mm | Sunshine, hours |
|---|---|---|---|---|---|
| Delhi (this page) | — | 33.7 | 24.2 | no data | no data |
| Bangkok (closest) | 1.3 | 32.1 | 25.2 | no data | no data |
| Mumbai (closest) | 2.3 | 29.8 | 24.9 | no data | no data |
| Lisbon (closest) | 6.8 | 26.1 | 18.2 | 31.2 | no data |
| Istanbul | 7.3 | 25.2 | 18.2 | 49.0 | no data |
| Porto | 8.2 | 25.6 | 15.9 | 59.5 | no data |
| Sydney | 12.5 | 21.1 | 11.9 | 49.1 | no data |
| Melbourne | 16.3 | 17.4 | 7.9 | 67.4 | no data |
Sources (1991-2020): ERA5-Land model estimates, checked . Each city's page names its grid cell. All sources in full on Methodology.
Sources
- Attribution: Copernicus Climate Change Service (2025): ERA5 Land hourly time-series data from 1950 to present. Copernicus Climate Change Service (C3S) Climate Data Store (CDS). DOI: 10.24381/ee82e357. Accessed on the check date shown. Generated using or contains modified Copernicus Climate Change Service information 2025. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains. Licence: CC BY 4.0. Checked .
- NOAA Solar Calculator equations, computed locally, NOAA Global Monitoring Laboratory (method); City by Month (computation). Attribution: Computed with the NOAA Solar Calculator method (no NOAA endorsement implied). Licence: Method, not data. Checked .
Official sources
Cite this page: City by Month. "Delhi in September: weather, daylight, holidays". https://citybymonth.com/cities/india/delhi/september/. Last updated 8 November 2026.