Biratnagar climate

Name: Biratnagar
Address: NP

Biratnagar is warmest in April, with average highs of 34 °C, and coldest in January, when nights average 11 °C. July is the wettest month (420 mm) and November the driest (3.6 mm). Figures are 1991–2020 climate normals.

Across a full year Biratnagar averages 1,668 mm of rain and 297 days above 25 °C.

Nepal · population 244,750 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month April 34 °C
Coldest month January 11 °C
Driest month November 4 mm
Wettest month July 420 mm
Least cloud November 17 % cloud
Hottest on record April 43 °C
Coldest on record January 5.5 °C

What to expectBiratnagar through the year

Biratnagar has a clear annual cycle: average daily highs run from 22 °C in January to 34 °C in April, a swing of 12 °C in mean temperature across the year.

Counted across a normal year, 297 days a year reach 25 °C, 168 of them reach 30 °C. The warmest reading in the 1991–2020 record is 43 °C, in April.

Rain is strongly seasonal. July averages 420 mm against 4 mm in November — 117 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	22.3 °C	10 mm	25 %
February	25.3 °C	11 mm	23 %
March	31.0 °C	12 mm	23 %
April	33.9 °C	37 mm	31 %
May	32.9 °C	125 mm	42 %
June	31.3 °C	310 mm	72 %
July	30.5 °C	420 mm	91 %
August	30.7 °C	355 mm	89 %
September	30.1 °C	301 mm	71 %
October	29.5 °C	79 mm	29 %
November	27.3 °C	4 mm	17 %
December	24.0 °C	4 mm	19 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	22.3 °C	10.7 °C	16.5 °C	27.5 °C	5.5 °C	2	0
February	25.3 °C	13.1 °C	19.4 °C	33.8 °C	6.3 °C	16	1
March	31.0 °C	17.5 °C	24.6 °C	38.3 °C	10.3 °C	30	20
April	33.9 °C	21.8 °C	28.0 °C	42.6 °C	13.9 °C	30	26
May	32.9 °C	23.9 °C	28.3 °C	42.5 °C	19.3 °C	31	27
June	31.3 °C	25.0 °C	27.9 °C	42.5 °C	22.4 °C	30	23
July	30.5 °C	25.3 °C	27.6 °C	36.8 °C	23.5 °C	31	21
August	30.7 °C	25.3 °C	27.6 °C	36.5 °C	23.2 °C	31	22
September	30.1 °C	24.3 °C	26.9 °C	35.3 °C	20.2 °C	30	17
October	29.5 °C	20.7 °C	25.0 °C	33.5 °C	14.4 °C	31	11
November	27.3 °C	15.8 °C	21.5 °C	32.6 °C	10.6 °C	27	2
December	24.0 °C	12.0 °C	18.0 °C	28.3 °C	5.9 °C	9	0

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	10 mm	1	11 h/day	25 %	70 %	10 km/h
February	11 mm	2	11 h/day	23 %	62 %	12 km/h
March	12 mm	2	12 h/day	23 %	48 %	16 km/h
April	37 mm	6	13 h/day	31 %	52 %	18 km/h
May	125 mm	15	13 h/day	42 %	68 %	17 km/h
June	310 mm	25	14 h/day	72 %	81 %	16 km/h
July	420 mm	29	14 h/day	91 %	86 %	16 km/h
August	355 mm	29	13 h/day	89 %	86 %	15 km/h
September	301 mm	23	12 h/day	71 %	85 %	13 km/h
October	79 mm	6	12 h/day	29 %	78 %	9.3 km/h
November	4 mm	0	11 h/day	17 %	68 %	8.9 km/h
December	4 mm	1	10 h/day	19 %	68 %	8.9 km/h

How Biratnagar compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Biratnagar	34 °C	11 °C	1,668 mm	297
Dharān · Nepal	30 °C	9.3 °C	1,765 mm	247
Purnia · India	35 °C	11 °C	1,696 mm	308
Saharsa · India	36 °C	11 °C	1,369 mm	304
Katihar · India	35 °C	11 °C	1,497 mm	305
Siliguri · India	31 °C	11 °C	3,047 mm	280
Rāiganj · India	34 °C	11 °C	1,744 mm	309

Planning a trip? See the best time to visit Biratnagar.

QuestionsCommon questions about Biratnagar’s climate

When is the best time to visit Biratnagar?

That depends on what you want, so the honest answer is a comparison rather than a single month. February, November, December sit closest to 20 °C on average, April is the warmest month and November the driest. The month-by-month table above has the full picture.

How hot does Biratnagar get?

In April, the warmest month, daily highs average 34 °C. About 168 days a year pass 30 °C. The highest value in the 1991–2020 record is 43 °C.

How cold does it get in winter?

Nights average 11 °C in January, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Biratnagar?

July, averaging 420 mm over 29 days with rain. The driest month is November with 4 mm. The year as a whole averages 1,668 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Biratnagar rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.