Hyperlocal rainfall totals + real-time NOAA forecasts
Accurate weather without the clutter
Patna, Bihar Weather by Month and Climate Averages
Monthly normals · Rain · Snow
Sunshine · Freeze dates · Records · Best time to visit
What is the weather like in Patna, Bihar?
Patna, Bihar gets 935 mm of precipitation a year over about 62 rainy days. May is the warmest month (average high 38°C) and January the coldest (average low 9°C).
Subtropical monsoon climate
Patna, Bihar has hot summers and warm winters. Daytime highs range from about 22°C in January to 38°C in May. July is usually the wettest month. The most comfortable time to visit is typically January to February and December, when daytime highs sit near 24°C.
| Season | Months | Avg low | Avg high |
|---|---|---|---|
| Winter | Dec–Feb | 11° | 24° |
| Spring | Mar–May | 22° | 36° |
| Summer | Jun–Aug | 27° | 34° |
| Autumn | Sep–Nov | 21° | 31° |
How much rain does Patna get?
Patna gets 935 mm of precipitation in an average year, spread over about 62 days with measurable rain. That is more rainy days than 56% of India.
July is the wettest month, with 249 mm. March is the driest, with 5 mm. July has the most rainy days, about 15.
Patna weather by month
Patna weather in January
In January, Patna averages a high of 22°C and a low of 9°C. It gets 11 mm of precipitation over about 2 rainy days. Estimated sunshine is 69% of daylight hours, derived from ERA5 cloud cover. The January record high is 29°C (2008) and the record low is 0°C (1975). January is one of the most comfortable months to visit.
Patna weather in February
In February, Patna averages a high of 27°C and a low of 12°C. It gets 15 mm of precipitation over about 2 rainy days. Estimated sunshine is 82% of daylight hours, derived from ERA5 cloud cover. The February record high is 39°C (1991) and the record low is 3°C (1974). February is one of the most comfortable months to visit.
Patna weather in March
In March, Patna averages a high of 33°C and a low of 17°C. It gets 5 mm of precipitation over about 2 rainy days. Estimated sunshine is 81% of daylight hours, derived from ERA5 cloud cover. The March record high is 42°C (2010) and the record low is 8°C (1979).
Patna weather in April
In April, Patna averages a high of 37°C and a low of 22°C. It gets 13 mm of precipitation over about 2 rainy days. Estimated sunshine is 73% of daylight hours, derived from ERA5 cloud cover. The April record high is 45°C (1980) and the record low is 15°C (1983).
Patna weather in May
In May, Patna averages a high of 38°C and a low of 25°C. It gets 35 mm of precipitation over about 4 rainy days. Estimated sunshine is 70% of daylight hours, derived from ERA5 cloud cover. The May record high is 46°C (2005) and the record low is 18°C (1980).
Patna weather in June
In June, Patna averages a high of 37°C and a low of 27°C. It gets 147 mm of precipitation over about 8 rainy days. Estimated sunshine is 39% of daylight hours, derived from ERA5 cloud cover. The June record high is 46°C (1995) and the record low is 19°C (1996).
Patna weather in July
In July, Patna averages a high of 34°C and a low of 27°C. It gets 249 mm of precipitation over about 15 rainy days. Estimated sunshine is 13% of daylight hours, derived from ERA5 cloud cover. The July record high is 40°C (1992) and the record low is 20°C (1977).
Patna weather in August
In August, Patna averages a high of 33°C and a low of 26°C. It gets 201 mm of precipitation over about 14 rainy days. Estimated sunshine is 16% of daylight hours, derived from ERA5 cloud cover. The August record high is 40°C (2002) and the record low is 22°C (1987).
Patna weather in September
In September, Patna averages a high of 33°C and a low of 26°C. It gets 201 mm of precipitation over about 10 rainy days. Estimated sunshine is 21% of daylight hours, derived from ERA5 cloud cover. The September record high is 39°C (1980) and the record low is 20°C (1986).
Patna weather in October
In October, Patna averages a high of 32°C and a low of 22°C. It gets 31 mm of precipitation over about 3 rainy days. Estimated sunshine is 64% of daylight hours, derived from ERA5 cloud cover. The October record high is 39°C (1994) and the record low is 14°C (1983).
Patna weather in November
In November, Patna averages a high of 29°C and a low of 16°C. It gets 19 mm of precipitation over about 1 rainy days. Estimated sunshine is 82% of daylight hours, derived from ERA5 cloud cover. The November record high is 35°C (1990) and the record low is 8°C (1975).
Patna weather in December
In December, Patna averages a high of 24°C and a low of 11°C. It gets 10 mm of precipitation over about 1 rainy days. Estimated sunshine is 80% of daylight hours, derived from ERA5 cloud cover. The December record high is 34°C (2014) and the record low is 4°C (1998). December is one of the most comfortable months to visit.
Sunshine, humidity and wind in Patna
February is the sunniest month in Patna, with estimated sunshine of 82% of daylight hours from ERA5 cloud cover. July is the cloudiest, at 13%. The annual cloud-cover estimate is 58% of daylight hours; it is not a measurement of sunshine duration. Patna is sunnier than 69% of India.
Humidity peaks in September at 84% and is lowest in April at 44%.
Patna has about 123 days a year above 32°C. Patna is hotter than 51% of India.
Patna weather records
These records cover PATNA during 1970–2025. Earlier records or other stations in the city may differ.
The hottest temperature on record at the Patna station is 46°C, on June 15, 1995. The coldest is 0°C, on January 28, 1975.
The wettest day in the available station history brought 462 mm of precipitation, on September 4, 1991.
16 all-time records have been set at the station since 1970.
The best time to visit Patna
The most comfortable time to visit is typically January to February and December, when daytime highs sit near 24°C.
Winter (December–February) is warm, with average highs around 24°C and lows near 11°C.
Spring (March–May) is hot, with average highs around 36°C and lows near 21°C.
Summer (June–August) is hot, with average highs around 34°C and lows near 27°C. It can feel humid.
Autumn (September–November) is hot, with average highs around 31°C and lows near 21°C.
Monthly climate
| Month | Average low | Average high | Precip | Rain days | Humidity | Estimated sunshine | Record high | Record low |
|---|---|---|---|---|---|---|---|---|
| January | 9° | 22° | 11 mm | 2 | 80% | 69% | 29° | 0° |
| February | 12° | 27° | 15 mm | 2 | 69% | 82% | 39° | 3° |
| March | 17° | 33° | 5.1 mm | 2 | 59% | 81% | 42° | 8° |
| April | 22° | 37° | 13 mm | 2 | 44% | 73% | 45° | 15° |
| May | 25° | 38° | 35 mm | 4 | 60% | 70% | 46° | 18° |
| June | 27° | 37° | 147 mm | 8 | 67% | 39% | 46° | 19° |
| July | 27° | 34° | 249 mm | 15 | 80% | 13% | 40° | 20° |
| August | 26° | 33° | 201 mm | 14 | 82% | 16% | 40° | 22° |
| September | 26° | 33° | 201 mm | 10 | 84% | 21% | 39° | 20° |
| October | 22° | 32° | 31 mm | 3 | 79% | 64% | 39° | 14° |
| November | 16° | 29° | 19 mm | 1 | 72% | 82% | 35° | 8° |
| December | 11° | 24° | 9.7 mm | 1 | 74% | 80% | 34° | 4° |
Station: PATNA, 4 km from the city. Temperature normal baseline: 1991–2020, calculated from available NOAA GHCN-Daily observations. Available station history: 1970–2025; record values refer to this station and period, not the entire city’s history. Precipitation includes rain and the water equivalent of frozen precipitation; snowfall depth is shown separately when available. Sources and methods
From ERA5 reanalysis. Sunshine is estimated from cloud cover.
Patna climate questions
How much rain does Patna get?
Patna gets 935 mm of precipitation in an average year, over about 62 rainy days.
What is the wettest month in Patna?
July is the wettest month in Patna, with 249 mm. March is the driest, with 5 mm.
How many rainy days does Patna have a year?
Patna has about 62 days with measurable rain in an average year. July has the most, about 15.
What is the hottest month in Patna?
May is the warmest month in Patna, with an average high of 38°C.
What is the coldest month in Patna?
January is the coldest month in Patna, with an average low of 9°C.
What is the record high temperature in Patna?
Within the available 1970–2025 station history, the record high at the Patna station is 46°C, set on June 15, 1995. The record low is 0°C, on January 28, 1975.
What is the sunniest month in Patna?
February is the sunniest month in Patna, with estimated sunshine of 82% of daylight hours from ERA5 cloud cover. July is the cloudiest.
What is the best time to visit Patna?
The most comfortable time to visit is typically January to February and December, when daytime highs sit near 24°C.