Birgañj climate
Birgañj (Nepal) has a monsoon-influenced humid subtropical climate (Köppen Cwa). The average temperature over the year is 26 °C79 °F, and about 1,219 mm48 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Birgañj climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 2373 | 1049 | 1661 | 110.4 |
| Feb | 2781 | 1355 | 2068 | 180.7 |
| Mar | 3392 | 1865 | 2678 | 180.7 |
| Apr | 39102 | 2474 | 3188 | 321.3 |
| May | 40103 | 2780 | 3392 | 893.5 |
| Jun | 38101 | 2882 | 3392 | 1987.8 |
| Jul | 3493 | 2780 | 3086 | 33513 |
| Aug | 3391 | 2679 | 2985 | 26711 |
| Sep | 3189 | 2577 | 2883 | 1947.7 |
| Oct | 3087 | 2170 | 2678 | 502.0 |
| Nov | 2781 | 1660 | 2271 | 20.1 |
| Dec | 2474 | 1152 | 1763 | 40.2 |
| Year | 40103 | 1049 | 2679 | 1,21948 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 48% | 36% | 3.6 | 10:37 |
| Feb | 41% | 32% | 4.6 | 11:12 |
| Mar | 32% | 33% | 5.8 | 11:56 |
| Apr | 28% | 41% | 6.5 | 12:46 |
| May | 39% | 52% | 6.4 | 13:28 |
| Jun | 55% | 70% | 5.5 | 13:50 |
| Jul | 78% | 87% | 4.5 | 13:41 |
| Aug | 83% | 84% | 4.7 | 13:05 |
| Sep | 83% | 67% | 4.6 | 12:17 |
| Oct | 73% | 30% | 4.8 | 11:28 |
| Nov | 61% | 18% | 4.2 | 10:46 |
| Dec | 54% | 25% | 3.6 | 10:27 |
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 Birgañj is like
The warmest month is May, with an average high of 40 °C103 °F and a low of 27 °C80 °F. The coldest is January, when highs average 23 °C73 °F and lows 10 °C49 °F. There is a clear seasonal cycle, with 16.9 °C30.4 °F between the average temperature of the warmest and the coolest month.
It is wet, with about 1,219 mm48 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 (335 mm13 in), the driest is November (2 mm0.1 in).
Relative humidity ranges from 28% in April to 83% in September. The clearest skies (lowest average cloud amount, 18%) are typical of November. Average wind speed near the ground ranges from 4 km/h (3 mph) in October to 8 km/h (5 mph) in July. Daylight lasts from about 10.4 hours in December to 13.8 hours in June.
Best time to visit Birgañj
Based on these averages, the most comfortable months for sightseeing and outdoor activities are November–February: average highs of 23 °C73 °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 (335 mm13 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 Birgañj
- Winter (December–February) — highs 2373 to 27 °C81 °F, lows 1049 to 13 °C55 °F, about 11 mm0.4 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 3392 to 40 °C103 °F, lows 1865 to 27 °C80 °F, about 46 mm1.8 in of precipitation a month. Pack very light, breathable clothing, a sun hat and plenty of water.
- Summer (June–August) — highs 3391 to 38 °C101 °F, lows 2679 to 28 °C82 °F, about 267 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 2781 to 31 °C89 °F, lows 1660 to 25 °C77 °F, about 82 mm3.2 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses.
How Birgañj compares
Compared with Bharatpur, about 86 km to the northwest, Birgañj is on average 0.5 °C0.9 °F warmer and receives 8% less precipitation (1,219 mm48 in vs 1,331 mm52 in). The difference is largest in June (0.9 °C1.6 °F warmer).
Of the 13 places in Nepal covered by World Climates, Birgañj is the 2nd warmest by annual mean temperature and the 10th wettest by annual precipitation. See all of them on the Nepal climate page.
Places in other countries with the most similar temperature and rainfall pattern: Bettiah (India, Cwa), Bagaha (India, Cwa) and Mothihari (India, Cwa).
Nearby places
- Mothihari 41 km · 26 °C78 °F · 1,134 mm45 in
- Bettiah 44 km · 26 °C78 °F · 1,239 mm49 in
- Hetauda 48 km · 24 °C75 °F · 1,224 mm48 in
- Bagaha 79 km · 26 °C78 °F · 1,239 mm49 in
- Bharatpur 86 km · 25 °C78 °F · 1,331 mm52 in
- Kathmandu 88 km · 19 °C66 °F · 1,084 mm43 in
- Siwan 103 km · 26 °C79 °F · 1,012 mm40 in
- Kushinagar 103 km · 26 °C79 °F · 1,084 mm43 in
Frequently asked questions
What is the warmest month in Birgañj?
May is the warmest month in Birgañj, with an average high of 40 °C (103 °F) and an average low of 27 °C (80 °F).
What is the coldest month in Birgañj?
January is the coldest month, with an average high of 23 °C (73 °F) and an average low of 10 °C (49 °F).
When does it rain the most in Birgañj?
July is the wettest month with about 335 mm (13.2 in) of precipitation; November is the driest with about 2 mm (0.1 in).
What is the best time to visit Birgañj?
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.
The grid cell’s average elevation is 210 m, while Birgañj lies at about 89 m. Temperatures on this page were therefore adjusted by +0.8 °C1.4 °F using the standard lapse rate of 6.5 °C per 1,000 m.