Patna weather in September
In September, Patna has an average high of 31 °C88 °F and an average low of 25 °C77 °F, with about 181 mm7.1 in of precipitation. It is the 6th warmest month of the year and ranks 3rd for precipitation.
How September compares with other months
Compared with August, September is 1.2 °C2.2 °F cooler on average and drier by 52 mm2.1 in. Compared with October, September is 2.5 °C4.5 °F warmer on average and wetter by 130 mm5.1 in. Daylight lasts about 12.3 hours around the middle of the month. Average relative humidity is 84% and the average cloud amount 65%.
Is September a good time to visit Patna?
September is not among the most comfortable months by our comfort score: it is hot (average high 31 °C88 °F), it is fairly wet (181 mm7.1 in) and it is humid (84%). The most comfortable months in Patna are November–February.
What to wear in September
For Patna in September, pack very light, breathable clothing, a sun hat and plenty of water and an umbrella or light rain jacket.
September in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Patna | 3188 | 2577 | 1817.1 |
| Chapra | 3189 | 2576 | 1867.3 |
| Jahanabad | 3189 | 2576 | 1817.1 |
| Arrah | 3189 | 2576 | 1736.8 |
| Bihar Sharif | 3188 | 2576 | 1847.2 |
| Muzaffarpur | 3189 | 2576 | 1967.7 |
| Gaya | 3188 | 2476 | 1817.1 |
| Begusarai | 3188 | 2577 | 1947.6 |
| Siwan | 3188 | 2476 | 1797.1 |
Other months in Patna
- January23 °C74 °F / 8 °C46 °F
- February28 °C83 °F / 12 °C53 °F
- March35 °C95 °F / 18 °C64 °F
- April41 °C105 °F / 24 °C75 °F
- May42 °C108 °F / 28 °C82 °F
- June40 °C103 °F / 30 °C85 °F
- July34 °C93 °F / 27 °C81 °F
- August32 °C90 °F / 26 °C79 °F
- September31 °C88 °F / 25 °C77 °F
- October31 °C87 °F / 20 °C69 °F
- November27 °C81 °F / 14 °C58 °F
- December24 °C74 °F / 10 °C49 °F
Frequently asked questions
How warm is Patna in September?
In September the average high in Patna is 31 °C (88 °F) and the average low is 25 °C (77 °F).
Does it rain a lot in Patna in September?
On average about 181 mm (7.1 in) of precipitation falls in September; it ranks 3rd of the 12 months.
Is September the warmest month in Patna?
No. The warmest month in Patna is May, with an average high of 42 °C (108 °F). The coldest month is January, with an average low of 8 °C (46 °F).
How long is the day in Patna in September?
In the middle of September the day in Patna lasts about 12.3 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Patna in September?
The average relative humidity in September is about 84%. Combined with warm days, it can feel muggy.
How cloudy is Patna in September?
On average about 65% of the sky is covered by cloud in September. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.