Janakpur climate
Janakpur (Nepal) has a monsoon-influenced humid subtropical climate (Köppen Cwa). The average temperature over the year is 26 °C78 °F, and about 1,145 mm45 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Janakpur climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 2373 | 847 | 1660 | 90.4 |
| Feb | 2882 | 1253 | 2067 | 150.6 |
| Mar | 3493 | 1763 | 2678 | 150.6 |
| Apr | 39102 | 2374 | 3188 | 271.1 |
| May | 40104 | 2780 | 3392 | 773.0 |
| Jun | 38101 | 2883 | 3392 | 1827.2 |
| Jul | 3492 | 2780 | 3086 | 31512 |
| Aug | 3290 | 2679 | 2985 | 2499.8 |
| Sep | 3188 | 2476 | 2882 | 2017.9 |
| Oct | 3087 | 2069 | 2578 | 502.0 |
| Nov | 2882 | 1559 | 2170 | 20.1 |
| Dec | 2374 | 1050 | 1762 | 30.1 |
| Year | 40104 | 847 | 2678 | 1,14545 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 51% | 39% | 2.9 | 10:38 |
| Feb | 43% | 31% | 4.3 | 11:13 |
| Mar | 31% | 31% | 5.6 | 11:56 |
| Apr | 29% | 32% | 6.3 | 12:46 |
| May | 40% | 43% | 6.3 | 13:27 |
| Jun | 55% | 64% | 5.5 | 13:49 |
| Jul | 78% | 79% | 4.8 | 13:40 |
| Aug | 83% | 75% | 5.1 | 13:04 |
| Sep | 84% | 63% | 4.6 | 12:16 |
| Oct | 74% | 26% | 4.6 | 11:29 |
| Nov | 63% | 14% | 3.9 | 10:47 |
| Dec | 57% | 30% | 2.9 | 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 Janakpur is like
The warmest month is May, with an average high of 40 °C104 °F and a low of 27 °C80 °F. The coldest is January, when highs average 23 °C73 °F and lows 8 °C47 °F. There is a clear seasonal cycle, with 17.7 °C31.8 °F between the average temperature of the warmest and the coolest month.
It is wet, with about 1,145 mm45 in of precipitation per year. The wettest three-month stretch is July–September, which brings 67% of the annual total. Months with less than 20 mm0.8 in on average: November–March. The wettest month is July (315 mm12 in), the driest is November (2 mm0.1 in).
Relative humidity ranges from 29% in April to 84% in September. The clearest skies (lowest average cloud amount, 14%) are typical of November. Average wind speed near the ground ranges from 4 km/h (3 mph) in November to 9 km/h (6 mph) in July. Daylight lasts from about 10.5 hours in December to 13.8 hours in June.
Best time to visit Janakpur
Based on these averages, the most comfortable months for sightseeing and outdoor activities are November–February: average highs of 23 °C73 °F to 28 °C82 °F with 2 mm0.1 in to 15 mm0.6 in of precipitation per month.
The most challenging month is July, which is hot, with average highs of 34 °C92 °F, very wet (315 mm12 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 Janakpur
- Winter (December–February) — highs 2373 to 28 °C82 °F, lows 847 to 12 °C53 °F, about 9 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 3493 to 40 °C104 °F, lows 1763 to 27 °C80 °F, about 40 mm1.6 in of precipitation a month. Pack very light, breathable clothing, a sun hat and plenty of water.
- Summer (June–August) — highs 3290 to 38 °C101 °F, lows 2679 to 28 °C83 °F, about 249 mm9.8 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 2882 to 31 °C88 °F, lows 1559 to 24 °C76 °F, about 84 mm3.3 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses.
How Janakpur compares
Compared with Muzaffarpur, about 86 km to the southwest, Janakpur has practically the same average temperature and receives 8% more precipitation (1,145 mm45 in vs 1,060 mm42 in). The difference is largest in May (0.8 °C1.5 °F cooler).
Of the 13 places in Nepal covered by World Climates, Janakpur is the 5th warmest by annual mean temperature and the 11th 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: Mothihari (India, Cwa), Bettiah (India, Cwa) and Bagaha (India, Cwa).
Nearby places
- Lahan 55 km · 26 °C78 °F · 1,104 mm43 in
- Muzaffarpur 86 km · 26 °C79 °F · 1,060 mm42 in
- Mothihari 101 km · 26 °C78 °F · 1,134 mm45 in
- Birgañj 109 km · 26 °C79 °F · 1,219 mm48 in
- Saharsa 116 km · 26 °C78 °F · 1,164 mm46 in
- Hetauda 118 km · 24 °C75 °F · 1,224 mm48 in
- Kathmandu 124 km · 19 °C66 °F · 1,084 mm43 in
- Dharan 135 km · 24 °C76 °F · 1,231 mm48 in
Frequently asked questions
What is the warmest month in Janakpur?
May is the warmest month in Janakpur, with an average high of 40 °C (104 °F) and an average low of 27 °C (80 °F).
What is the coldest month in Janakpur?
January is the coldest month, with an average high of 23 °C (73 °F) and an average low of 8 °C (47 °F).
When does it rain the most in Janakpur?
July is the wettest month with about 315 mm (12.4 in) of precipitation; November is the driest with about 2 mm (0.1 in).
What is the best time to visit Janakpur?
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.