Patna sits directly on the banks of the Ganges in Bihar, one of the most flood-exposed major cities in India, where the June-to-September monsoon combines with the river’s own seasonal rise to produce recurring flood risk in low-lying riverside neighborhoods. Because Patna’s flooding is often driven by rainfall far upstream across the wider Ganges basin rather than local rain alone, regional radar coverage is an important part of how flood risk gets tracked here each monsoon season.
Rain in Patna by month
Patna gets about 994 mm (39.1 in) of rain in an average year. The wettest month is July, with 276 mm (10.9 in), and the driest is November, with 2 mm (0.1 in).
| Month | Average rain | Average temperature |
|---|---|---|
| January | 11 mm (0.4 in) | 15.6 °C (60 °F) |
| February | 14 mm (0.5 in) | 20.0 °C (68 °F) |
| March | 9 mm (0.4 in) | 26.2 °C (79 °F) |
| April | 14 mm (0.6 in) | 32.2 °C (90 °F) |
| May | 50 mm (2.0 in) | 35.0 °C (95 °F) |
| June | 152 mm (6.0 in) | 34.6 °C (94 °F) |
| July | 276 mm (10.9 in) | 30.4 °C (87 °F) |
| August | 233 mm (9.2 in) | 29.2 °C (85 °F) |
| September | 181 mm (7.1 in) | 28.0 °C (82 °F) |
| October | 51 mm (2.0 in) | 25.5 °C (78 °F) |
| November | 2 mm (0.1 in) | 20.9 °C (70 °F) |
| December | 3 mm (0.1 in) | 16.5 °C (62 °F) |
Long-term monthly averages from NASA POWER (MERRA-2 satellite reanalysis). They describe the wider area around Patna and can differ slightly from local weather-station records.
Learn more: Flash Flood Warning Signs on Radar · Open the full Rain Map
Frequently Asked Questions
Is it raining in Patna right now?
The map above shows recent radar observations over Patna, Bihar where coverage is available. Use the map legend and timestamp to interpret the imagery. A blank map over Patna can mean no detected precipitation, missing coverage, delayed data, or rain too light for radar to detect.
How often does the Patna rain radar update?
Updates depend on the radar provider and local network. Check the timestamp on the map for the latest available frame, and press play to compare recent observations. Radar imagery can lag conditions on the ground.
Can I see if a storm is heading toward Patna?
Press play to compare recent radar frames over Bihar and see the direction of detected rain. This can help you assess approaching showers near Patna, but storms can grow or change direction; check your local weather service for forecasts and warnings.
Is this Patna rain radar free to use?
Yes, completely free – no account, app download, or sign-up required. It works in any browser on desktop and mobile.