Lahān weather in January

In January, Lahān sees average daytime highs of 22°C and overnight lows near 10°C, with 12 mm of rain across 1.8 wet days and about 10.5 hours of daylight. It is the 12th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 22°C through the month. The sky is clear or mostly clear about 68% of the time in January, and the air most often feels dry.

Daylight stretches from about 10 h 18 min at the start of January to 10 h 42 min by month's end. Set against the rest of the year, January is Lahān's 6th-clearest and 9th-windiest month. For the whole year in context, see Lahān's year-round climate.

Daytime high: 22°; 12th warmest
Overnight low: 10°; 1st coldest
Rainfall: 12 mm; 1.8 wet days
Daylight: 10 h 30 min; 6:54 AM – 5:23 PM
Cloud cover: 31%; 6th clearest
Wind: 6 km/h; 9th windiest
Solar energy: 3.85 kWh/m²
Travel score: 8.5; out of 10

Lahān is municipality in Siraha District, Nepal.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

← December Lahān year-round climate February →Best places to visit in January

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 22°C through the month.

A typical January day in Lahān reaches about 22°C in the afternoon and slips back to 10°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 25°C. Set against its neighbours, January runs about 2°C cooler than December and about 4°C cooler than February.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Avg high (°C)	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	23	23	23	23	23
Avg low (°C)	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	11	11	11	11	11	11

	Avg high (°C)	Avg low (°C)
1	22	10
2	22	10
3	22	10
4	22	10
5	22	10
6	22	10
7	22	10
8	22	10
9	22	10
10	22	10
11	22	10
12	22	10
13	22	10
14	22	10
15	22	10
16	22	10
17	22	10
18	22	10
19	22	10
20	22	10
21	22	10
22	22	10
23	22	10
24	22	10
25	22	10
26	22	11
27	23	11
28	23	11
29	23	11
30	23	11
31	23	11

How January really feels in Lahān

Once humidity and wind are folded in, January averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

January sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Lahān weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 9th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	22° / 10°	12	1.8	10.5	8.5
Feb	26° / 13°	12	2.1	11.1	8.5
Mar	31° / 17°	12	2.4	11.8	5.6
Apr	35° / 22°	31	5.6	12.6	3.1
May	34° / 24°	97	13.7	13.3	2.7
Jun	33° / 26°	252	23	13.6	2.5
Jul	31° / 26°	413	27.6	13.5	2.6
Aug	31° / 26°	279	27	12.9	2.6
Sep	31° / 25°	240	23.1	12.2	3.2
Oct	30° / 21°	57	6.9	11.4	5.8
Nov	28° / 16°	4	0.5	10.7	8.3
Dec	24° / 11°	4	0.8	10.4	9.1

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 68% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 15% of January, with mostly cloudy or overcast conditions the remaining 17%. Skies tend to cloud over as the month goes on.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Clearer (%)	86	86	86	86	86	86	86	86	86	85	85	85	84	84	84	83	83	83	81	81	80	80	80	80	80	80	80	80	80	81	81
Cloudier (%)	14	14	14	14	14	14	14	14	14	15	15	15	16	16	16	17	17	17	19	19	20	20	20	20	20	20	20	20	20	19	19

	Clearer (%)	Cloudier (%)
1	86	14
2	86	14
3	86	14
4	86	14
5	86	14
6	86	14
7	86	14
8	86	14
9	86	14
10	85	15
11	85	15
12	85	15
13	84	16
14	84	16
15	84	16
16	83	17
17	83	17
18	83	17
19	81	19
20	81	19
21	80	20
22	80	20
23	80	20
24	80	20
25	80	20
26	80	20
27	80	20
28	80	20
29	80	20
30	81	19
31	81	19

Chance of precipitation in January

Any precipitation

Lahān gets around 12 mm of rain over 1.8 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 6% and peaks near 6% on the wettest days.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Rain chance (%)	5	5	5	5	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	5	5	5	5	5	5	5	5	5

	Rain chance (%)
1	5
2	5
3	5
4	5
5	6
6	6
7	6
8	6
9	6
10	6
11	6
12	6
13	6
14	6
15	6
16	6
17	6
18	6
19	6
20	6
21	6
22	6
23	5
24	5
25	5
26	5
27	5
28	5
29	5
30	5
31	5

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

Most of January feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, January lands in the dry band about 92% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Dry (%)	94	95	95	95	95	95	95	95	95	95	95	95	94	94	93	93	92	92	91	91	90	90	90	89	89	88	88	87	86	86	85
Comfortable (%)	6	5	5	5	5	5	5	5	5	5	5	5	6	6	7	7	8	8	9	9	10	10	10	11	11	12	12	13	14	14	15

	Dry (%)	Comfortable (%)
1	94	6
2	95	5
3	95	5
4	95	5
5	95	5
6	95	5
7	95	5
8	95	5
9	95	5
10	95	5
11	95	5
12	95	5
13	94	6
14	94	6
15	93	7
16	93	7
17	92	8
18	92	8
19	91	9
20	91	9
21	90	10
22	90	10
23	90	10
24	89	11
25	89	11
26	88	12
27	88	12
28	87	13
29	86	14
30	86	14
31	85	15

Wind in January

Winds average 6 km/h in January.

Across January, daily wind ranges from about 5 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Wind speed (km/h)	5	5	5	5	5	5	5	5	5	5	5	5	5	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	5	calm
2	5	calm
3	5	calm
4	5	calm
5	5	calm
6	5	calm
7	5	calm
8	5	calm
9	5	calm
10	5	calm
11	5	calm
12	5	calm
13	5	calm
14	6	calm
15	6	calm
16	6	calm
17	6	calm
18	6	calm
19	6	calm
20	6	calm
21	6	calm
22	6	calm
23	6	calm
24	6	calm
25	6	calm
26	6	calm
27	6	calm
28	6	calm
29	6	calm
30	6	calm
31	6	calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 10 h 18 min at the start of January to 10 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over January. Sunrise moves from 6:52 AM to 6:50 AM, and sunset from 5:13 PM to 5:35 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Daylight (h)	10.3	10.4	10.4	10.4	10.4	10.4	10.4	10.4	10.4	10.4	10.4	10.4	10.5	10.5	10.5	10.5	10.5	10.5	10.5	10.5	10.6	10.6	10.6	10.6	10.6	10.6	10.7	10.7	10.7	10.7	10.7
Sunrise (AM)	6:52	6:52	6:52	6:53	6:53	6:53	6:53	6:53	6:53	6:54	6:54	6:54	6:54	6:54	6:54	6:54	6:54	6:53	6:53	6:53	6:53	6:53	6:53	6:53	6:52	6:52	6:52	6:51	6:51	6:51	6:50
Sunset (PM)	5:13	5:13	5:14	5:15	5:15	5:16	5:17	5:17	5:18	5:19	5:19	5:20	5:21	5:22	5:22	5:23	5:24	5:25	5:25	5:26	5:27	5:28	5:28	5:29	5:30	5:31	5:31	5:32	5:33	5:34	5:35

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	10.3	6:52	5:13
2	10.4	6:52	5:13
3	10.4	6:52	5:14
4	10.4	6:53	5:15
5	10.4	6:53	5:15
6	10.4	6:53	5:16
7	10.4	6:53	5:17
8	10.4	6:53	5:17
9	10.4	6:53	5:18
10	10.4	6:54	5:19
11	10.4	6:54	5:19
12	10.4	6:54	5:20
13	10.5	6:54	5:21
14	10.5	6:54	5:22
15	10.5	6:54	5:22
16	10.5	6:54	5:23
17	10.5	6:54	5:24
18	10.5	6:53	5:25
19	10.5	6:53	5:25
20	10.5	6:53	5:26
21	10.6	6:53	5:27
22	10.6	6:53	5:28
23	10.6	6:53	5:28
24	10.6	6:53	5:29
25	10.6	6:52	5:30
26	10.6	6:52	5:31
27	10.7	6:52	5:31
28	10.7	6:51	5:32
29	10.7	6:51	5:33
30	10.7	6:51	5:34
31	10.7	6:50	5:35

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 3.85 kWh/m².

For context, solar energy here swings from a low near 3.63 kWh/m² to a high of 6.33 kWh/m² in April across the year — January's 3.85 kWh/m² sits near the bottom.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Solar energy (kWh/m²)	3.7	3.7	3.7	3.8	3.8	3.8	3.8	3.8	3.8	3.8	3.8	3.8	3.8	3.9	3.9	3.9	3.9	3.9	3.9	3.9	3.9	3.9	3.9	4.0	4.0	4.0	4.0	4.0	4.1	4.1	4.1
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	3.7	Moderate
2	3.7	Moderate
3	3.7	Moderate
4	3.8	Moderate
5	3.8	Moderate
6	3.8	Moderate
7	3.8	Moderate
8	3.8	Moderate
9	3.8	Moderate
10	3.8	Moderate
11	3.8	Moderate
12	3.8	Moderate
13	3.8	Moderate
14	3.9	Moderate
15	3.9	Moderate
16	3.9	Moderate
17	3.9	Moderate
18	3.9	Moderate
19	3.9	Moderate
20	3.9	Moderate
21	3.9	Moderate
22	3.9	Moderate
23	3.9	Moderate
24	4.0	Moderate
25	4.0	Moderate
26	4.0	Bright
27	4.0	Bright
28	4.0	Bright
29	4.1	Bright
30	4.1	Bright
31	4.1	Bright

Planning a trip in January

Hazard calendar for Lahān

In seasonPeak

None of Lahān's seasonal hazards are active in January. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Lahān's monsoon runs June–September, when most of the year's rain falls.

Monsoon

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is January a good time to visit Lahān?

Our two travel scores rate January for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

8.5

Sightseeing

2nd-best month of the year

6.0

Beach & pool

7th-best month of the year

January is one of the better times to visit Lahān for general sightseeing.

What to pack for Lahān in January

From January's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In January, Lahān sees daytime highs around 22°C and nights near 10°C. Worth packing: light clothes.

light clothes

UV index in Lahān in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Lahān peaks around July 19 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 18 at about 4 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	4	4	9	7	8	7	12	9	9	6	4	4
Level	Moderate	Moderate	Very high	Very high	Very high	High	Extreme	Very high	Very high	High	Moderate	Moderate

	UV index (midday)	Level
Jan	4	Moderate
Feb	4	Moderate
Mar	9	Very high
Apr	7	Very high
May	8	Very high
Jun	7	High
Jul	12	Extreme
Aug	9	Very high
Sep	9	Very high
Oct	6	High
Nov	4	Moderate
Dec	4	Moderate

Air quality in Lahān in January

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where January falls, not just the annual average.

Air quality in Lahān is worst in January — around 169 µg/m³ PM2.5 (very unhealthy), about 4.9× the cleanest month (July, 35 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	169	138	107	87	70	57	35	43	55	87	125	160
Level	Very unhealthy	Unhealthy	Unhealthy	Unhealthy	Unhealthy	Unhealthy	Moderate	Poor	Unhealthy	Unhealthy	Unhealthy	Very unhealthy

	PM2.5 (µg/m³)	Level
Jan	169	Very unhealthy
Feb	138	Unhealthy
Mar	107	Unhealthy
Apr	87	Unhealthy
May	70	Unhealthy
Jun	57	Unhealthy
Jul	35	Moderate
Aug	43	Poor
Sep	55	Unhealthy
Oct	87	Unhealthy
Nov	125	Unhealthy
Dec	160	Very unhealthy

Location & terrain

Where is Lahān?

Lahān sits at 26.7°N, 86.5°E, 123 m above sea level, in Nepal. The nearest listed city is Triyuga, 23 km away.

Topography around Lahān

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Lahān.

Within 3 km, the terrain around Lahān has only modest variations in elevation — a maximum elevation change of 32 m around an average of 115 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 367 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,111 m.

The land around Lahān is covered by cropland (61%) within 3 km, cropland (54%) and trees (38%) within 16 km, and cropland (47%) and trees (45%) within 80 km.

3 km

32 m

cropland 61%

16 km

367 m

cropland 54%

80 km

3,111 m

cropland 47%

treesgrasslandcroplandartificial surfacesbare terrainwater

← December Lahān year-round climate February →Best places to visit in January

January weather nearby: Triyuga 23 km · Siraha 28 km · Rājbirāj 33 km · Janakpur 55 km · Inaruwa 67 km · Jaleshwar 68 km · Īṭahari̇̄ 79 km · Dharān 80 km

Nepal travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type C / D / M; 230 V · 50 Hz
Prices: ≈ 24% of US; price level, 2025
GDP per capita: $1,536; 2025
Happiness: 5.1 / 10; World Happiness, 2025
Safe drinking water: 16%; of population, 2024
Homicide rate: 2.1; per 100k, 2020
Road deaths: 16.3; per 100k/yr, 2019
Income group: Lower middle; World Bank
English: Moderate; EF EPI 514
Religion

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Lahān (26.7202°, 86.4826°, elevation 123 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).

	Avg high (°C)	Avg low (°C)
1	22	10
2	22	10
3	22	10
4	22	10
5	22	10
6	22	10
7	22	10
8	22	10
9	22	10
10	22	10
11	22	10
12	22	10
13	22	10
14	22	10
15	22	10
16	22	10
17	22	10
18	22	10
19	22	10
20	22	10
21	22	10
22	22	10
23	22	10
24	22	10
25	22	10
26	22	11
27	23	11
28	23	11
29	23	11
30	23	11
31	23	11

	Clearer (%)	Cloudier (%)
1	86	14
2	86	14
3	86	14
4	86	14
5	86	14
6	86	14
7	86	14
8	86	14
9	86	14
10	85	15
11	85	15
12	85	15
13	84	16
14	84	16
15	84	16
16	83	17
17	83	17
18	83	17
19	81	19
20	81	19
21	80	20
22	80	20
23	80	20
24	80	20
25	80	20
26	80	20
27	80	20
28	80	20
29	80	20
30	81	19
31	81	19

	Rain chance (%)
1	5
2	5
3	5
4	5
5	6
6	6
7	6
8	6
9	6
10	6
11	6
12	6
13	6
14	6
15	6
16	6
17	6
18	6
19	6
20	6
21	6
22	6
23	5
24	5
25	5
26	5
27	5
28	5
29	5
30	5
31	5

	Dry (%)	Comfortable (%)
1	94	6
2	95	5
3	95	5
4	95	5
5	95	5
6	95	5
7	95	5
8	95	5
9	95	5
10	95	5
11	95	5
12	95	5
13	94	6
14	94	6
15	93	7
16	93	7
17	92	8
18	92	8
19	91	9
20	91	9
21	90	10
22	90	10
23	90	10
24	89	11
25	89	11
26	88	12
27	88	12
28	87	13
29	86	14
30	86	14
31	85	15

	Avg high (°C)	Avg low (°C)
1	22	10
2	22	10
3	22	10
4	22	10
5	22	10
6	22	10
7	22	10
8	22	10
9	22	10
10	22	10
11	22	10
12	22	10
13	22	10
14	22	10
15	22	10
16	22	10
17	22	10
18	22	10
19	22	10
20	22	10
21	22	10
22	22	10
23	22	10
24	22	10
25	22	10
26	22	11
27	23	11
28	23	11
29	23	11
30	23	11
31	23	11

	Clearer (%)	Cloudier (%)
1	86	14
2	86	14
3	86	14
4	86	14
5	86	14
6	86	14
7	86	14
8	86	14
9	86	14
10	85	15
11	85	15
12	85	15
13	84	16
14	84	16
15	84	16
16	83	17
17	83	17
18	83	17
19	81	19
20	81	19
21	80	20
22	80	20
23	80	20
24	80	20
25	80	20
26	80	20
27	80	20
28	80	20
29	80	20
30	81	19
31	81	19

	Rain chance (%)
1	5
2	5
3	5
4	5
5	6
6	6
7	6
8	6
9	6
10	6
11	6
12	6
13	6
14	6
15	6
16	6
17	6
18	6
19	6
20	6
21	6
22	6
23	5
24	5
25	5
26	5
27	5
28	5
29	5
30	5
31	5

	Dry (%)	Comfortable (%)
1	94	6
2	95	5
3	95	5
4	95	5
5	95	5
6	95	5
7	95	5
8	95	5
9	95	5
10	95	5
11	95	5
12	95	5
13	94	6
14	94	6
15	93	7
16	93	7
17	92	8
18	92	8
19	91	9
20	91	9
21	90	10
22	90	10
23	90	10
24	89	11
25	89	11
26	88	12
27	88	12
28	87	13
29	86	14
30	86	14
31	85	15

	Avg high (°C)	Avg low (°C)
1	22	10
2	22	10
3	22	10
4	22	10
5	22	10
6	22	10
7	22	10
8	22	10
9	22	10
10	22	10
11	22	10
12	22	10
13	22	10
14	22	10
15	22	10
16	22	10
17	22	10
18	22	10
19	22	10
20	22	10
21	22	10
22	22	10
23	22	10
24	22	10
25	22	10
26	22	11
27	23	11
28	23	11
29	23	11
30	23	11
31	23	11

	Clearer (%)	Cloudier (%)
1	86	14
2	86	14
3	86	14
4	86	14
5	86	14
6	86	14
7	86	14
8	86	14
9	86	14
10	85	15
11	85	15
12	85	15
13	84	16
14	84	16
15	84	16
16	83	17
17	83	17
18	83	17
19	81	19
20	81	19
21	80	20
22	80	20
23	80	20
24	80	20
25	80	20
26	80	20
27	80	20
28	80	20
29	80	20
30	81	19
31	81	19

	Rain chance (%)
1	5
2	5
3	5
4	5
5	6
6	6
7	6
8	6
9	6
10	6
11	6
12	6
13	6
14	6
15	6
16	6
17	6
18	6
19	6
20	6
21	6
22	6
23	5
24	5
25	5
26	5
27	5
28	5
29	5
30	5
31	5

	Dry (%)	Comfortable (%)
1	94	6
2	95	5
3	95	5
4	95	5
5	95	5
6	95	5
7	95	5
8	95	5
9	95	5
10	95	5
11	95	5
12	95	5
13	94	6
14	94	6
15	93	7
16	93	7
17	92	8
18	92	8
19	91	9
20	91	9
21	90	10
22	90	10
23	90	10
24	89	11
25	89	11
26	88	12
27	88	12
28	87	13
29	86	14
30	86	14
31	85	15