Climate averages 1991–2020
Nagapattinam weather
in September.
A hot, moderately wet month: the joint 5th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Nagapattinam: daytime highs average 31.7°C and nights cool to about 26.8°C. By daytime temperature it is the joint 5th warmest of the 12 months.
Expect about 80 mm of rain on roughly 16 days, which makes September a moderately wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 12 min on an average September day.
The nearest other city in this atlas is Kāraikāl (17 km away). In September its highs average 31.8°C, about as warm as Nagapattinam, with 72 mm of rain.
Among the 692 cities listed in India, Nagapattinam ranks joint 182nd of 692 for the warmest September highs and joint 72nd of 692 for the driest September (rainfall, lowest first). The mean September high of those 692 cities is 30.7°C; Nagapattinam is 1.1°C warmer than that mean.
From September to October, average highs fall by 1.8°C to 29.9°C, and monthly rainfall rises from 80 mm to 207 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Nagapattinam climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 26.9°C23.9°C | 23.9°C | 39 | 6.4 | 11.612 h |
| February | 28.1°C24.3°C | 24.3°C | 19 | 3.5 | 11.812 h |
| March | 30.0°C25.5°C | 25.5°C | 22 | 3.2 | 12.112 h |
| April | 31.7°C27.3°C | 27.3°C | 36 | 6.6 | 12.412 h |
| May | 33.0°C28.2°C | 28.2°C | 44 | 6.1 | 12.613 h |
| June | 33.0°C27.9°C | 27.9°C | 37 | 7.9 | 12.713 h |
| July | 32.8°C27.5°C | 27.5°C | 41 | 10.6 | 12.713 h |
| August | 32.2°C27.0°C | 27.0°C | 60 | 12.9 | 12.512 h |
| September, selected | 31.7°C26.8°C | 26.8°C | 80 | 15.6 | 12.212 h |
| October | 29.9°C25.7°C | 25.7°C | 207 | 20.8 | 11.912 h |
| November | 27.7°C24.8°C | 24.8°C | 335 | 21.0 | 11.612 h |
| December | 26.8°C24.2°C | 24.2°C | 201 | 14.8 | 11.512 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Kāraikāl in SeptemberIndia · 17 kmHigh 31.8°C · Low 26.8°C · 72 mm rain
- Mayiladuthurai in SeptemberIndia · 43 kmHigh 32.5°C · Low 26.3°C · 72 mm rain
- Kumbakonam in SeptemberIndia · 54 kmHigh 34.4°C · Low 25.8°C · 96 mm rain
- Pattukkottai in SeptemberIndia · 69 kmHigh 33.9°C · Low 25.6°C · 116 mm rain
- Thanjavur in SeptemberIndia · 77 kmHigh 34.8°C · Low 25.7°C · 108 mm rain
- Virudhachalam in SeptemberIndia · 101 kmHigh 34.1°C · Low 25.3°C · 116 mm rain
- Neyveli in SeptemberIndia · 101 kmHigh 33.8°C · Low 25.4°C · 117 mm rain
- Cuddalore in SeptemberIndia · 111 kmHigh 31.7°C · Low 26.4°C · 92 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Nagapattinam) is explained once on the Nagapattinam year overview and on the Sources, method and limits page.