Jember weather in May

In May, Jember sees average daytime highs of 29°C and overnight lows near 21°C, with 108 mm of rain across 15.5 wet days and about 11.6 hours of daylight. It is the 3rd-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 20% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 11 h 42 min at the start of May to 11 h 36 min by month's end. Set against the rest of the year, May is Jember's 2nd-clearest and 5th-windiest month. For the whole year in context, see Jember's year-round climate.

Daytime high
29°
3rd warmest
Overnight low
21°
6th coldest
Rainfall
108 mm
15.5 wet days
Daylight
11 h 36 min
5:33 AM – 5:10 PM
Cloud cover
63%
2nd clearest
Wind
5 km/h
5th windiest
Solar energy
4.85 kWh/m²
Travel score
5.0
out of 10

Jember is former administrative city and capital of Jember Regency.

Founded
1976

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 29°C through the month.

A typical May day in Jember reaches about 29°C in the afternoon and slips back to 21°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 30°C. Set against its neighbours, May runs on par with April and about 1°C warmer than June.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12921
22921
32921
42921
52921
62921
72921
82921
92921
102921
112921
122921
132921
142921
152921
162921
172921
182821
192821
202821
212821
222821
232821
242821
252821
262821
272820
282820
292820
302820
312820

How May really feels in Jember

Once humidity and wind are folded in, May 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
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

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

Jember weather by month

How May compares with the rest of the year at a glance. May is the 3rd-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 22°35929.312.43.1
Feb29° / 22°33427.112.33.0
Mar29° / 22°32227.812.13.2
Apr29° / 22°21424.411.83.6
May29° / 21°10815.511.65.0
Jun28° / 20°6410.711.56.1
Jul27° / 19°387.611.66.8
Aug27° / 18°256.211.76.9
Sep28° / 19°5710.2126.1
Oct29° / 20°1191812.24.6
Nov29° / 21°26825.412.43.5
Dec28° / 22°33828.212.53.2

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 20% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 27% of May, with mostly cloudy or overcast conditions the remaining 53%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13862
23862
33862
43961
53961
64060
74159
84159
94357
104357
114456
124555
134753
144852
154951
164951
175050
185248
195248
205248
215248
225248
235248
245248
255149
265149
275149
285050
295050
304951
314852

Chance of precipitation in May

Any precipitation

Jember gets around 108 mm of rain over 15.5 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 50% and peaks near 62% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
162
261
361
460
559
658
757
856
955
1054
1153
1252
1351
1450
1548
1647
1746
1845
1945
2044
2144
2244
2344
2444
2543
2643
2743
2842
2942
3042
3142

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 63% of days. Sticky, muggy-or-worse air turns up on roughly 97% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)
111881
211980
312178
412277
522375
622474
722672
822771
922969
1033067
1133166
1233364
1333463
1433562
1533661
1643759
1743858
1843957
1943957
2034057
2134057
2234156
2334156
2434255
2534255
2634255
2734255
2834354
2924355
3024355
3124454

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 11 h 42 min at the start of May to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over May. Sunrise moves from 5:31 AM to 5:36 AM, and sunset from 5:14 PM to 5:09 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.75:315:14
211.75:315:14
311.75:315:13
411.75:315:13
511.75:315:13
611.75:315:12
711.75:315:12
811.75:325:12
911.75:325:12
1011.75:325:11
1111.75:325:11
1211.65:325:11
1311.65:325:11
1411.65:325:11
1511.65:325:10
1611.65:335:10
1711.65:335:10
1811.65:335:10
1911.65:335:10
2011.65:335:10
2111.65:345:10
2211.65:345:10
2311.65:345:10
2411.65:345:10
2511.65:345:09
2611.65:355:09
2711.65:355:09
2811.65:355:09
2911.65:355:09
3011.65:355:09
3111.65:365:09

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.85 kWh/m².

For context, solar energy here swings from a low near 4.62 kWh/m² to a high of 6.09 kWh/m² in October across the year — May's 4.85 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.0Bright
45.0Bright
54.9Bright
64.9Bright
74.9Bright
84.9Bright
94.9Bright
104.9Bright
114.9Bright
124.9Bright
134.9Bright
144.9Bright
154.9Bright
164.9Bright
174.9Bright
184.9Bright
194.8Bright
204.8Bright
214.8Bright
224.8Bright
234.8Bright
244.8Bright
254.8Bright
264.8Bright
274.8Bright
284.7Bright
294.7Bright
304.7Bright
314.7Bright
Planning a trip in May

Hazard calendar for Jember

In seasonPeak

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

Jember sits in the South Indian Ocean cyclone belt; the season peaks January–March.

Jember's monsoon runs November–April, when most of the year's rain falls.

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

Is May a good time to visit Jember?

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

5.0
Sightseeing
5th-best month of the year
6.0
Beach & pool
5th-best month of the year

May is a reasonable time to visit Jember for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Jember in May

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

In May, Jember sees daytime highs around 29°C and nights near 21°C. Pack light clothes and rain gear. Worth having: sun protection. About 16 days see rain.

light clothesrain gearsun protection

Sea temperature near Jember in May

The nearest coast averages about 28°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 42 km away) is warmest in March at about 29°C and coldest in August near 25°C.

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

24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb29Tropical
Mar29Tropical
Apr29Tropical
May28Tropical
Jun27Warm
Jul26Warm
Aug25Warm
Sep25Warm
Oct26Warm
Nov28Warm
Dec29Tropical

UV index in Jember in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Jember peaks around March 21 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 18 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 21UV 14Jun 18UV 9
UV index (midday)Level
Jan13Extreme
Feb11Extreme
Mar14Extreme
Apr13Extreme
May11Extreme
Jun8Very high
Jul10Very high
Aug12Extreme
Sep13Extreme
Oct13Extreme
Nov12Extreme
Dec12Extreme

Air quality in Jember 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 Jember is worst in July — around 46 µg/m³ PM2.5 (poor), about 1.9× the cleanest month (September, 24 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModeratePoorModerateJul 1644 µg/m³Sep 1825 µg/m³
PM2.5 (µg/m³)Level
Jan33Moderate
Feb31Moderate
Mar37Poor
Apr35Poor
May31Moderate
Jun34Moderate
Jul46Poor
Aug34Moderate
Sep24Moderate
Oct29Moderate
Nov27Moderate
Dec29Moderate
Location & terrain

Where is Jember?

Jember sits at 8.2°S, 113.7°E, 86 m above sea level, in Indonesia. The nearest listed city is Bondowoso, 32 km away.

Topography around Jember

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

Within 3 km, the terrain around Jember has only modest variations in elevation — a maximum elevation change of 118 m around an average of 99 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,460 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,219 m.

The land around Jember is covered by artificial surfaces (54%) and trees (29%) within 3 km, trees (64%) and cropland (25%) within 16 km, and trees (47%) and water (37%) within 80 km.

3 km
118 m
16 km
1,460 m
80 km
3,219 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Bondowoso 32 km · Kencong 39 km · Besuki 49 km · Lumajang 52 km · Genteng 54 km · Balung 54 km · Gambiran Satu 55 km · Kraksaan 57 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 Jember (-8.1721°, 113.6995°, elevation 86 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).