Patna, India climate
Cwa Monsoon-influenced humid subtropical
Patna has a seasonal tropical climate (Monsoon-influenced humid subtropical, Köppen Cwa). The hottest month is June with an average daily high near 98°F, while the coldest is January averaging around 48°F at night. Precipitation totals about 51 inches a year and is strongly seasonal — September alone averages 14.8 inches while March barely receives 0.18 inches.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresClear vs cloudy days
Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day countsPatna climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 71 | 80 | 91 | 99 | 100 | 98 | 92 | 92 | 91 | 90 | 84 | 75 |
| Avg temp (°F) | 60 | 67 | 77 | 85 | 89 | 89 | 86 | 86 | 85 | 81 | 72 | 63 |
| Avg low (°F) | 48 | 54 | 63 | 72 | 78 | 80 | 80 | 79 | 78 | 71 | 60 | 51 |
| Precipitation (in) | 0.5 | 0.8 | 0.2 | 0.6 | 0.6 | 7.7 | 13.2 | 10.2 | 14.8 | 1.0 | 1.1 | 0.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 71 | 80 | 91 | 99 | 100 | 98 |
| Avg temp (°F) | 60 | 67 | 77 | 85 | 89 | 89 |
| Avg low (°F) | 48 | 54 | 63 | 72 | 78 | 80 |
| Precipitation (in) | 0.5 | 0.8 | 0.2 | 0.6 | 0.6 | 7.7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 92 | 92 | 91 | 90 | 84 | 75 |
| Avg temp (°F) | 86 | 86 | 85 | 81 | 72 | 63 |
| Avg low (°F) | 80 | 79 | 78 | 71 | 60 | 51 |
| Precipitation (in) | 13.2 | 10.2 | 14.8 | 1.0 | 1.1 | 0.3 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 2 | 2 | 2 | 2 | 3 | 7 | 14 | 14 | 10 | 3 | 0.7 | 0.5 |
| Days with high ≥ 90°F (days) | — | 0.7 | 12 | 20 | 21 | 20 | 17 | 17 | 16 | 12 | 1 | 0.0 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 2 | 2 | 2 | 2 | 3 | 7 |
| Days with high ≥ 90°F (days) | — | 0.7 | 12 | 20 | 21 | 20 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 14 | 14 | 10 | 3 | 0.7 | 0.5 |
| Days with high ≥ 90°F (days) | 17 | 17 | 16 | 12 | 1 | 0.0 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 32 | 26 | 26 | 33 | 44 | 67 | 82 | 79 | 65 | 31 | 17 | 24 |
| Clear days (≤ 30% cloud) | 17 | 19 | 22 | 17 | 11 | 3 | 0.4 | 0.7 | 5 | 19 | 25 | 21 |
| Partly cloudy days (30–70%) | 11 | 6 | 6 | 10 | 14 | 10 | 7 | 8 | 9 | 7 | 3 | 8 |
| Cloudy days (≥ 70%) | 3 | 3 | 3 | 4 | 6 | 16 | 24 | 22 | 16 | 5 | 2 | 2 |
| Relative humidity (%) | 49 | 40 | 29 | 24 | 32 | 49 | 76 | 83 | 85 | 73 | 61 | 54 |
| Wind speed (mph) | 3.6 | 4.0 | 4.7 | 4.9 | 5.4 | 6.3 | 6.0 | 4.9 | 4.4 | 2.7 | 2.7 | 3.0 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 32 | 26 | 26 | 33 | 44 | 67 |
| Clear days (≤ 30% cloud) | 17 | 19 | 22 | 17 | 11 | 3 |
| Partly cloudy days (30–70%) | 11 | 6 | 6 | 10 | 14 | 10 |
| Cloudy days (≥ 70%) | 3 | 3 | 3 | 4 | 6 | 16 |
| Relative humidity (%) | 49 | 40 | 29 | 24 | 32 | 49 |
| Wind speed (mph) | 3.6 | 4.0 | 4.7 | 4.9 | 5.4 | 6.3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 82 | 79 | 65 | 31 | 17 | 24 |
| Clear days (≤ 30% cloud) | 0.4 | 0.7 | 5 | 19 | 25 | 21 |
| Partly cloudy days (30–70%) | 7 | 8 | 9 | 7 | 3 | 8 |
| Cloudy days (≥ 70%) | 24 | 22 | 16 | 5 | 2 | 2 |
| Relative humidity (%) | 76 | 83 | 85 | 73 | 61 | 54 |
| Wind speed (mph) | 6.0 | 4.9 | 4.4 | 2.7 | 2.7 | 3.0 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 23 years of daily observations at Patna, a weather station, about 4 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.