Bireun weather in May

In May, Bireun sees average daytime highs of 30°C and overnight lows near 26°C, with 193 mm of rain across 23.1 wet days and about 12.2 hours of daylight. It is the 2nd-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 3% of the time in May, and the air most often feels miserable.

Daylight stretches from about 12 h 12 min at the start of May to 12 h 18 min by month's end. Set against the rest of the year, May is Bireun's 8th-clearest and 9th-windiest month. For the whole year in context, see Bireun's year-round climate.

Daytime high
30°
2nd warmest
Overnight low
26°
12th coldest
Rainfall
193 mm
23.1 wet days
Daylight
12 h 12 min
6:22 AM – 6:37 PM
Cloud cover
86%
8th clearest
Wind
5 km/h
9th windiest
Solar energy
5.16 kWh/m²
Travel score
3.1
out of 10

Bireun is capital of Bireuen Regency, Indonesia.

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 30°C through the month.

A typical May day in Bireun reaches about 30°C in the afternoon and slips back to 26°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 31°C. Set against its neighbours, May runs on par with April and on par with June.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13026
23026
33026
43026
53026
63026
73026
83026
93026
103026
113026
123026
133026
143026
153026
163026
173026
183126
193126
203126
213126
223126
233126
243126
253126
263026
273026
283026
293026
303026
313026

How May really feels in Bireun

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
heat index over the day's high
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.

Bireun 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
Jan29° / 25°15621.811.73.9
Feb29° / 25°11818.411.84.0
Mar30° / 25°14422.3123.6
Apr30° / 25°16825.112.13.0
May30° / 26°19323.112.23.1
Jun31° / 26°1261812.33.6
Jul30° / 26°13619.512.33.6
Aug30° / 25°15721.812.23.4
Sep30° / 25°19924.1123.2
Oct29° / 25°27227.411.93.1
Nov29° / 25°36727.911.83.0
Dec29° / 25°29225.211.73.5

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 3% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 7% of May, with mostly cloudy or overcast conditions the remaining 90%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1991
2991
3991
4991
5991
6991
7991
8991
9991
10991
11991
12991
131090
141090
151090
161090
171090
181090
191090
201090
211090
221189
231189
241189
251189
261090
271189
281189
291189
301189
311288

Chance of precipitation in May

Any precipitation

Bireun gets around 193 mm of rain over 23.1 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 75% and peaks near 81% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
181
281
381
481
580
680
780
879
978
1078
1177
1276
1375
1475
1574
1674
1773
1873
1972
2072
2171
2271
2371
2471
2571
2671
2771
2871
2971
3070
3170

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the miserable band about 99% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
1199
2199
3199
4199
5199
6199
7199
8199
9199
10199
11199
12199
13199
14199
15199
16199
17199
18199
19199
20298
21298
22298
23298
24298
25298
26298
27298
28298
29298
30298
31298

Wind in May

Winds average 5 km/h in May.

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

0246810151015202531
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 12 min at the start of May to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over May. Sunrise moves from 6:25 AM to 6:22 AM, and sunset from 6:36 PM to 6:39 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.26:256:36
212.26:256:36
312.26:246:36
412.26:246:36
512.26:246:36
612.26:246:36
712.26:246:36
812.26:236:36
912.26:236:36
1012.26:236:36
1112.26:236:36
1212.26:236:36
1312.26:236:36
1412.26:236:36
1512.26:226:36
1612.26:226:37
1712.26:226:37
1812.26:226:37
1912.26:226:37
2012.26:226:37
2112.36:226:37
2212.36:226:37
2312.36:226:37
2412.36:226:38
2512.36:226:38
2612.36:226:38
2712.36:226:38
2812.36:226:38
2912.36:226:39
3012.36:226:39
3112.36:226:39

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.16 kWh/m².

For context, solar energy here swings from a low near 4 kWh/m² to a high of 5.45 kWh/m² in March across the year — May's 5.16 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.1Bright
45.1Bright
55.1Bright
65.1Bright
75.1Bright
85.1Bright
95.1Bright
105.1Bright
115.1Bright
125.1Bright
135.1Bright
145.1Bright
155.2Bright
165.2Bright
175.2Bright
185.2Bright
195.2Bright
205.2Bright
215.2Bright
225.2Bright
235.2Bright
245.2Bright
255.2Bright
265.2Bright
275.2Bright
285.2Bright
295.2Bright
305.2Bright
315.2Bright
Planning a trip in May

Hazard calendar for Bireun

In seasonPeak

In May, Bireun sits inside its cyclone season. The full year is below, with each hazard's peak months called out.

Bireun sits in the North Indian Ocean cyclone zone; the season peaks May and October–November.

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

Is May a good time to visit Bireun?

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

3.1
Sightseeing
9th-best month of the year
4.5
Beach & pool
7th-best month of the year

May is a weaker month for outdoor sightseeing in Bireun.

What to pack for Bireun in May

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

In May, Bireun sees daytime highs around 30°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 23 days see rain.

light clothesrain gearsun protection

Sea temperature near Bireun in May

The nearest coast averages about 30°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 21 km away) is warmest in May at about 30°C and coldest in January near 28°C.

The water stays above 20°C all year — warm enough for a swim any month.

26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan28Tropical
Feb29Tropical
Mar29Tropical
Apr30Tropical
May30Tropical
Jun30Tropical
Jul30Tropical
Aug30Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec28Tropical

UV index in Bireun in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Bireun peaks around February 21 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeFeb 21UV 14Dec 14UV 10
UV index (midday)Level
Jan11Extreme
Feb14Extreme
Mar14Extreme
Apr14Extreme
May12Extreme
Jun11Extreme
Jul11Extreme
Aug11Extreme
Sep13Extreme
Oct13Extreme
Nov11Extreme
Dec10Extreme

Air quality in Bireun 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 Bireun is worst in September — around 19 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateJun 1818 µg/m³Dec 1513 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb16Moderate
Mar19Moderate
Apr18Moderate
May18Moderate
Jun19Moderate
Jul18Moderate
Aug18Moderate
Sep19Moderate
Oct17Moderate
Nov14Moderate
Dec13Moderate
Location & terrain

Where is Bireun?

Bireun sits at 5.2°N, 96.7°E, 19 m above sea level, in Indonesia. The nearest listed city is Reuleuet, 46 km away.

Topography around Bireun

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

Within 3 km, the terrain around Bireun has only modest variations in elevation — a maximum elevation change of 158 m around an average of 20 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 372 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,846 m.

The land around Bireun is covered by trees (41%), cropland (31%) and artificial surfaces (24%) within 3 km, trees (49%) and water (39%) within 16 km, and trees (59%) and water (35%) within 80 km.

3 km
158 m
16 km
372 m
80 km
2,846 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Reuleuet 46 km · Lhokseumawe 50 km · Sigli 84 km · Meulaboh 134 km · Banda Aceh 156 km · Langsa 162 km · Blangpidie 163 km · Sabang 171 km

Indonesia travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 29% of US
price level, 2025
GDP per capita
$5,060
2025
Happiness
5.6 / 10
World Happiness, 2025
Safe drinking water
30%
of population, 2024
Homicide rate
0.3
per 100k, 2022
Road deaths
11.3
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 471
Religion
Muslim 87%Protestant 8%Roman Catholic 3%Hindu 2%

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 Bireun (5.203°, 96.7009°, elevation 19 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).