Thoothukudi weather in September
In September, Thoothukudi has daytime highs averaging 32 °C, nights around 26 °C, with 7.0 wet days, and a sea temperature of 28 °C. Figures are 1991–2020 climate normals.
- 32.5°C Average high
- 26.0°C Average low
- 7.0days Wet days
- 36mm Rainfall
- 28.0°C Sea temperature
- 12h Daylight
Daily temperatures through September
How September develops
Averages for the first, middle and last part of the month, from daily 1991–2020 normals. Chance of rain is the share of years in which that calendar day recorded more than 1 mm.
| Days | Avg high | Avg low | Chance of rain |
|---|---|---|---|
| 1–10 September | 32.5 °C | 26.1 °C | 20 % |
| 11–20 September | 32.7 °C | 26.0 °C | 19 % |
| 21–30 September | 32.2 °C | 26.0 °C | 31 % |
- Rain is most likely over days 21–30 of September (31 % of days) and least likely over days 11–20 (19 %).
What to expect
| Measure | Typical September | Share of the month |
|---|---|---|
| Days above 25 °C | 30 of 30 | 100 % |
| Days above 30 °C | 29 of 30 | 96 % |
| Days below 0 °C | 0 of 30 | 0 % |
| Days with more than 1 mm rain | 7.0 of 30 | 23 % |
Conditions in September
| Measure | Average |
|---|---|
| Mean temperature | 29 °C |
| Record high (1991–2020) | 38 °C |
| Record low (1991–2020) | 24 °C |
| Relative humidity | 68 % |
| Wind speed | 20 km/h |
| Cloud cover | 73 % |
September compared with the months around it
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| July | 33.0 °C | 17 mm | 84 % |
| August | 32.7 °C | 22 mm | 80 % |
| September | 32.5 °C | 36 mm | 73 % |
| October | 30.8 °C | 191 mm | 77 % |
| November | 28.7 °C | 274 mm | 75 % |
See all twelve months for Thoothukudi
- September is the 5th warmest month here.
- It is the 6th driest month of the year.
- It ranks 7th for least cloud cover.
- Days last about 12 hours from sunrise to sunset.
- It rains on 7.0 of 30 days — 23 % of the month.
- Nights are about 6.5 °C cooler than the middle of the day.
- The hottest September day on record since 1991 reached 38 °C, 5.1 °C above the usual daytime high.
- Beach score: 78 / 100 — see how this is calculated.
QuestionsSeptember in Thoothukudi, answered
How warm is Thoothukudi in September?
Daily highs average 32 °C and nights fall to about 26 °C, a spread of 6.5 °C between afternoon and dawn. That makes September the 6th warmest month of the year here.
Does it rain much in Thoothukudi in September?
September averages 36 mm of rain, spread over about 7 of the 30 days — 23 % of the month. Cloud cover averages 73 % of the sky.
Is the sea warm enough to swim in September?
The sea averages 28 °C off Thoothukudi in September. Most people find water below 20 °C bracing and above 25 °C comfortable for a long swim; this figure is a monthly surface average, so a sheltered bay on a still afternoon can be warmer.
How long are the days in September?
Thoothukudi averages 12 hours between sunrise and sunset in September. Day length is computed from latitude and date, so it is exact rather than modelled — but it says nothing about how much of that time is sunny.
Data sources and method
- ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
- Open-Meteo — Open-Meteo.com. CC BY 4.0
- NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
- GeoNames — GeoNames.org. CC BY 4.0
- Normal period
- 1991–2020
- Dataset version
- era5-1991-2020-scores1.1
- Last processed
Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: daylight hours, beach and comfort scores, monthly rankings, threshold day counts, chance of a wet day by date, ten-day averages within the month. Full formulas are on the methodology page.
Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.