Siraha weather in May

In May, Siraha sees average daytime highs of 36°C and overnight lows near 25°C, with 85 mm of rain across 11.7 wet days and about 13.3 hours of daylight. It is the 2nd-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 36°C through the month. The sky is clear or mostly clear about 59% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 13 hours at the start of May to 13 h 30 min by month's end. Set against the rest of the year, May is Siraha's 8th-clearest and 3rd-windiest month. For the whole year in context, see Siraha's year-round climate.

Daytime high
36°
2nd warmest
Overnight low
25°
9th coldest
Rainfall
85 mm
11.7 wet days
Daylight
13 h 18 min
5:17 AM – 6:36 PM
Cloud cover
39%
8th clearest
Wind
10 km/h
3rd windiest
Solar energy
6.1 kWh/m²
Travel score
2.2
out of 10

Siraha is municipality in Siraha District, Nepal.

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 36°C through the month.

A typical May day in Siraha reaches about 36°C in the afternoon and slips back to 25°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 31°C and 40°C. Set against its neighbours, May runs on par with April and about 2°C warmer than June.

20°25°30°35°40°45°151015202531
Avg high (°C)Avg low (°C)
13624
23625
33625
43625
53625
63625
73625
83625
93625
103625
113625
123625
133625
143625
153625
163626
173626
183626
193626
203626
213626
223526
233526
243526
253526
263526
273526
283526
293526
303526
313526

How May really feels in Siraha

Once humidity and wind are folded in, May averages 31 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
31
18 feel dangerously hot (≥ 39°C)
Days feeling ≤ C
0
wind chill below the day's low

The story in May is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Siraha weather by month

How May compares with the rest of the year at a glance. May is the 2nd-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan23° / 10°121.610.58.7
Feb26° / 13°111.611.18.4
Mar32° / 18°112.411.85.0
Apr36° / 23°265.312.62.5
May36° / 25°8511.713.32.2
Jun34° / 26°22920.813.62.3
Jul32° / 26°39326.413.52.5
Aug32° / 26°25826.112.92.5
Sep31° / 25°22021.312.23.2
Oct31° / 21°50511.45.5
Nov28° / 16°20.310.77.9
Dec24° / 12°40.610.49.2

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 59% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 23% of May, with mostly cloudy or overcast conditions the remaining 18%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18317
28317
38317
48416
58515
68515
78515
88515
98614
108614
118614
128614
138515
148515
158515
168317
178317
188218
198119
208119
218020
228020
238020
248020
257921
267921
277921
287822
297822
307723
317624

Chance of precipitation in May

Any precipitation

Siraha gets around 85 mm of rain over 11.7 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 37% and peaks near 48% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
128
229
329
430
530
631
731
832
932
1032
1133
1233
1334
1435
1536
1637
1738
1839
1940
2040
2141
2242
2343
2443
2544
2644
2745
2846
2946
3047
3148

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the oppressive band about 44% of days. Sticky, muggy-or-worse air turns up on roughly 84% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
11081947160
2981848170
3881848190
4771748200
5671648220
6671648240
7561548250
8561447270
9561346291
10551345311
11451244341
12451143362
13441042382
14341040413
1533939433
1623837464
1722834485
1822732516
1912630547
2012627568
2111525599
22115236010
23114206311
24014186413
25014176414
26014156416
27013136518
28013126519
29013116421
30013106323
3101296226

Wind in May

Winds average 10 km/h in May.

Across May, daily wind ranges from about 10 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 hours at the start of May to 13 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 30 minutes over May. Sunrise moves from 5:28 AM to 5:11 AM, and sunset from 6:27 PM to 6:44 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:286:27
213.05:276:28
313.05:266:28
413.15:256:29
513.15:246:29
613.15:246:30
713.15:236:31
813.15:226:31
913.25:226:32
1013.25:216:32
1113.25:206:33
1213.25:206:33
1313.25:196:34
1413.35:186:34
1513.35:186:35
1613.35:176:36
1713.35:176:36
1813.35:166:37
1913.45:166:37
2013.45:156:38
2113.45:156:38
2213.45:146:39
2313.45:146:39
2413.45:146:40
2513.55:136:41
2613.55:136:41
2713.55:136:42
2813.55:126:42
2913.55:126:43
3013.55:126:43
3113.55:116:44

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 6.1 kWh/m².

For context, solar energy here swings from a low near 3.7 kWh/m² to a high of 6.49 kWh/m² in April across the year — May's 6.1 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.4Intense
26.4Intense
36.4Intense
46.4Intense
56.4Intense
66.3Intense
76.3Intense
86.3Intense
96.3Intense
106.3Intense
116.3Intense
126.3Intense
136.2Intense
146.2Intense
156.2Intense
166.1Intense
176.1Intense
186.1Intense
196.0Intense
206.0Intense
216.0Bright
225.9Bright
235.9Bright
245.9Bright
255.9Bright
265.8Bright
275.8Bright
285.8Bright
295.8Bright
305.8Bright
315.7Bright
Planning a trip in May

Hazard calendar for Siraha

In seasonPeak

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

Siraha'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 May a good time to visit Siraha?

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

2.2
Sightseeing
12th-best month of the year
5.0
Beach & pool
8th-best month of the year

May is a weaker month for outdoor sightseeing in Siraha.

What to pack for Siraha in May

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

In May, Siraha sees daytime highs around 36°C and nights near 25°C. Pack light clothes and sun protection. Worth having: rain gear. About 12 days see rain.

light clothessun protectionrain gear

UV index in Siraha in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Siraha 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateVery highExtremeVery highModerateJul 19UV 11Jan 18UV 4
UV index (midday)Level
Jan4Moderate
Feb4Moderate
Mar9Very high
Apr7Very high
May8Very high
Jun7High
Jul12Extreme
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec4Moderate

Air quality in Siraha in May

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Siraha 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).

0306090120150180JanFebMarAprMayJunJulAugSepOctNovDecVery unhealthyUnhealthyPoorUnhealthyJan 12167 µg/m³Jul 2036 µg/m³
PM2.5 (µg/m³)Level
Jan169Very unhealthy
Feb138Unhealthy
Mar107Unhealthy
Apr87Unhealthy
May70Unhealthy
Jun57Unhealthy
Jul35Moderate
Aug43Poor
Sep55Unhealthy
Oct87Unhealthy
Nov125Unhealthy
Dec160Very unhealthy
Location & terrain

Where is Siraha?

Siraha sits at 26.7°N, 86.2°E, 82 m above sea level, in Nepal. The nearest listed city is Lahān, 28 km away.

TriyugaRājbirājMalaṅgawāGaurInaruwa

Topography around Siraha

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

Within 3 km, the terrain around Siraha has only modest variations in elevation — a maximum elevation change of 15 m around an average of 75 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 67 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,775 m.

The land around Siraha is covered by cropland (67%) within 3 km, cropland (78%) within 16 km, and cropland (54%) and trees (38%) within 80 km.

3 km
15 m
16 km
67 m
80 km
2,775 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Lahān 28 km · Janakpur 29 km · Jaleshwar 41 km · Triyuga 51 km · Rājbirāj 55 km · Malaṅgawā 68 km · Gaur 93 km · Inaruwa 94 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
Hindu 81%Buddhist 8%Muslim 5%Kirat 3%

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 Siraha (26.6542°, 86.2079°, elevation 82 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).