Bihar weather in May
May is one of the least pleasant months in Bihar: highs of 42°C (108°F) and about 50 mm (2.0 in) of rain on average. Nights average 28°C (82°F) and cloud cover 41% (NASA POWER, 2001–2025 averages). It is the 6th wettest month of the year and the warmest. Compared with April, it is warmer and wetter; June brings highs of 40°C (103°F) and 152 mm (6.0 in) of rain.
Figures are long-term averages for Patna, the largest city in Bihar. See below for other places.
Is May a good time to visit Bihar?
least pleasant month Weather score 43/100.
May is one of the least pleasant months for weather in Bihar. For better conditions, consider Oct–Mar.
Does it rain a lot in Bihar in May?
No, it is usually dry: about 50 mm (2.0 in) falls in an average May. It is the 6th wettest month of the year.
How warm is Bihar in May?
Days average 42°C (108°F) and nights 28°C (82°F).
Bihar weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | 23°C (74°F) | 8°C (46°F) | 11 mm | 32% | best |
| February | 28°C (83°F) | 12°C (53°F) | 14 mm | 25% | best |
| March | 35°C (95°F) | 18°C (64°F) | 9 mm | 24% | best |
| April | 41°C (105°F) | 24°C (75°F) | 14 mm | 29% | fair |
| May | 42°C (108°F) | 28°C (82°F) | 50 mm | 41% | least pleasant |
| June | 40°C (103°F) | 30°C (85°F) | 152 mm | 66% | least pleasant |
| July | 34°C (93°F) | 27°C (80°F) | 276 mm | 82% | least pleasant |
| August | 32°C (90°F) | 26°C (79°F) | 233 mm | 77% | least pleasant |
| September | 31°C (88°F) | 25°C (76°F) | 181 mm | 65% | fair |
| October | 31°C (87°F) | 20°C (69°F) | 51 mm | 28% | best |
| November | 27°C (81°F) | 14°C (58°F) | 2 mm | 14% | best |
| December | 24°C (74°F) | 10°C (49°F) | 3 mm | 25% | best |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months
Weather across Bihar in May
Weather can differ a lot within Bihar: coasts, hills and mountains each have their own climate.
| Place | High | Low | Rain | Weather |
|---|---|---|---|---|
| Patna | 42°C (108°F) | 28°C (82°F) | 50 mm | least pleasant |
| Gaya | 42°C (108°F) | 28°C (82°F) | 46 mm | least pleasant |
| Bhāgalpur | 40°C (103°F) | 26°C (80°F) | 91 mm | least pleasant |
| Muzaffarpur | 41°C (106°F) | 27°C (81°F) | 61 mm | least pleasant |
| Bihār Sharīf | 42°C (107°F) | 28°C (82°F) | 50 mm | least pleasant |
| Darbhanga | 41°C (106°F) | 27°C (81°F) | 61 mm | least pleasant |
| Purnia | 38°C (101°F) | 26°C (78°F) | 122 mm | least pleasant |
| Arrah | 42°C (108°F) | 28°C (82°F) | 46 mm | least pleasant |
| Begusarai | 41°C (105°F) | 27°C (81°F) | 62 mm | least pleasant |
| Katihar | 39°C (101°F) | 26°C (79°F) | 114 mm | least pleasant |
| Munger | 41°C (105°F) | 27°C (81°F) | 62 mm | least pleasant |
| Chāpra | 41°C (107°F) | 28°C (82°F) | 56 mm | least pleasant |