Patna is warmest in April, averaging 41° by day and 24° at night. The wettest month is August with 226 mm, and the year brings about 982 mm in total.
Month by month
| Month | High | Low | Rain | Daylight | Good for |
|---|---|---|---|---|---|
| January | 23° | 9° | 3 mm | 10.6 h | Sightseeing |
| February | 28° | 12° | 14 mm | 11.1 h | Beach weather |
| March | 35° | 18° | 16 mm | 11.8 h | Beach weather |
| April | 41° | 24° | 12 mm | 12.6 h | Very hot |
| May | 40° | 28° | 84 mm | 13.3 h | Very hot |
| June | 39° | 30° | 177 mm | 13.6 h | Very hot |
| July | 34° | 27° | 217 mm | 13.5 h | Rainy season |
| August | 33° | 26° | 226 mm | 12.9 h | Rainy season |
| September | 32° | 25° | 168 mm | 12.1 h | Mild |
| October | 31° | 21° | 62 mm | 11.4 h | Beach weather |
| November | 28° | 15° | 0 mm | 10.7 h | Beach weather |
| December | 25° | 10° | 3 mm | 10.4 h | Sightseeing |
High and low are average daily maximum and minimum, rain is typical monthly total, daylight is the hours between sunrise and sunset mid-month. Climate normals from NASA POWER — averages, not promises.
When to go
Beach weather: February, March, October and November — highs around 30°, nights no colder than 12°, and at most 62 mm of rain in a month.
Walking the city: January and December — highs of 23–25° and no more than 3 mm of rain a month.
Wet season: July and August — up to 226 mm in a single month.
Serious heat: In April, May and June the average high reaches 41°.