Bettiah climate
Bettiah (Bihar, India) has a monsoon-influenced humid subtropical climate (Köppen Cwa). The average temperature over the year is 26 °C78 °F, and about 1,239 mm49 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Bettiah climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 2272 | 847 | 1560 | 130.5 |
| Feb | 2781 | 1254 | 1967 | 180.7 |
| Mar | 3492 | 1763 | 2578 | 180.7 |
| Apr | 39102 | 2374 | 3188 | 281.1 |
| May | 40104 | 2780 | 3392 | 833.3 |
| Jun | 39101 | 2883 | 3392 | 2017.9 |
| Jul | 3493 | 2780 | 3086 | 35214 |
| Aug | 3290 | 2679 | 2985 | 27011 |
| Sep | 3188 | 2576 | 2882 | 1997.8 |
| Oct | 3086 | 2069 | 2578 | 512.0 |
| Nov | 2780 | 1559 | 2169 | 20.1 |
| Dec | 2373 | 1050 | 1662 | 40.2 |
| Year | 40104 | 847 | 2678 | 1,23949 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 52% | 38% | 2.9 | 10:37 |
| Feb | 44% | 27% | 4.3 | 11:13 |
| Mar | 33% | 25% | 5.7 | 11:56 |
| Apr | 27% | 33% | 6.4 | 12:46 |
| May | 37% | 42% | 6.4 | 13:27 |
| Jun | 53% | 62% | 5.5 | 13:49 |
| Jul | 78% | 80% | 4.6 | 13:40 |
| Aug | 83% | 76% | 4.9 | 13:05 |
| Sep | 83% | 61% | 4.6 | 12:16 |
| Oct | 73% | 24% | 4.5 | 11:28 |
| Nov | 63% | 15% | 3.7 | 10:47 |
| Dec | 57% | 29% | 2.8 | 10:28 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Bettiah is like
The warmest month is June, with an average high of 39 °C101 °F and a low of 28 °C83 °F. The coldest is January, when highs average 22 °C72 °F and lows 8 °C47 °F. Seasons are strongly marked: the warmest month is on average 18.1 °C32.6 °F warmer than the coldest.
It is wet, with about 1,239 mm49 in of precipitation per year. The wettest three-month stretch is June–August, which brings 66% of the annual total. Months with less than 20 mm0.8 in on average: November–March. The wettest month is July (352 mm14 in), the driest is November (2 mm0.1 in).
Relative humidity ranges from 27% in April to 83% in September. The clearest skies (lowest average cloud amount, 15%) are typical of November. Average wind speed near the ground ranges from 4 km/h (2 mph) in October to 8 km/h (5 mph) in July. Daylight lasts from about 10.5 hours in December to 13.8 hours in June.
Best time to visit Bettiah
Based on these averages, the most comfortable months for sightseeing and outdoor activities are November–February: average highs of 22 °C72 °F to 27 °C81 °F with 2 mm0.1 in to 18 mm0.7 in of precipitation per month.
The most challenging month is July, which is hot, with average highs of 34 °C93 °F, very wet (352 mm14 in) and humid (78% relative humidity).
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Bettiah
- Winter (December–February) — highs 2272 to 27 °C81 °F, lows 847 to 12 °C54 °F, about 12 mm0.5 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an extra layer for the cooler mornings and evenings.
- Spring (March–May) — highs 3492 to 40 °C104 °F, lows 1763 to 27 °C80 °F, about 43 mm1.7 in of precipitation a month. Pack very light, breathable clothing, a sun hat and plenty of water.
- Summer (June–August) — highs 3290 to 39 °C101 °F, lows 2679 to 28 °C83 °F, about 274 mm11 in of precipitation a month. Pack very light, breathable clothing, a sun hat and plenty of water and a good rain jacket or umbrella and quick-drying shoes.
- Autumn (September–November) — highs 2780 to 31 °C88 °F, lows 1559 to 25 °C76 °F, about 84 mm3.3 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses.
How Bettiah compares
Compared with Birgañj, about 44 km to the northeast, Bettiah has practically the same average temperature and receives a similar amount of precipitation. The difference is largest in December (1 °C1.7 °F cooler).
Of the 382 places in India covered by World Climates, Bettiah is the 242nd warmest by annual mean temperature and the 111th wettest by annual precipitation. See all of them on the India climate page.
Places in other countries with the most similar temperature and rainfall pattern: Janakpur (Nepal, Cwa), Birgañj (Nepal, Cwa) and Butwal (Nepal, Cwa).
Nearby places
- Birgañj 44 km · 26 °C79 °F · 1,219 mm48 in
- Mothihari 44 km · 26 °C78 °F · 1,134 mm45 in
- Bagaha 53 km · 26 °C78 °F · 1,239 mm49 in
- Kushinagar 62 km · 26 °C79 °F · 1,084 mm43 in
- Siwan 66 km · 26 °C79 °F · 1,012 mm40 in
- Hetauda 87 km · 24 °C75 °F · 1,224 mm48 in
- Bharatpur 98 km · 25 °C78 °F · 1,331 mm52 in
- Gorakhpur 113 km · 26 °C78 °F · 1,200 mm47 in
Frequently asked questions
What is the warmest month in Bettiah?
June is the warmest month in Bettiah, with an average high of 39 °C (101 °F) and an average low of 28 °C (83 °F).
What is the coldest month in Bettiah?
January is the coldest month, with an average high of 22 °C (72 °F) and an average low of 8 °C (47 °F).
When does it rain the most in Bettiah?
July is the wettest month with about 352 mm (13.8 in) of precipitation; November is the driest with about 2 mm (0.1 in).
What is the best time to visit Bettiah?
Judging by long-term averages, the most comfortable months are November–February.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.