Kralendijk weather in September

In September, Kralendijk sees average daytime highs of 28°C and overnight lows near 27°C, with 74 mm of rain across 15 wet days and about 12.1 hours of daylight. It is the 1st-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 31% of the time in September, and the air most often feels miserable.

Daylight stretches from about 12 h 12 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Kralendijk's 8th-clearest and 10th-windiest month. For the whole year in context, see Kralendijk's year-round climate.

Daytime high
28°
1st warmest
Overnight low
27°
12th coldest
Rainfall
74 mm
15 wet days
Daylight
12 h 06 min
6:25 AM – 6:29 PM
Cloud cover
61%
8th clearest
Wind
26 km/h
10th windiest
Solar energy
6.16 kWh/m²
Travel score
5.1
out of 10

Kralendijk is capital of Bonaire, Caribbean Netherlands.

Founded
1837

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical September day in Kralendijk reaches about 28°C in the afternoon and slips back to 27°C overnight — a 1°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 29°C. Set against its neighbours, September runs on par with August and on par with October.

24°26°28°30°32°151015202530
Avg high (°C)Avg low (°C)
12827
22827
32827
42827
52827
62827
72827
82827
92827
102827
112827
122827
132827
142827
152827
162827
172827
182827
192827
202827
212827
222827
232827
242827
252827
262827
272827
282827
292827
302827

How September really feels in Kralendijk

Once humidity and wind are folded in, September averages 30 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
30
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

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

Kralendijk weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 25°351011.47.1
Feb26° / 25°16511.67.8
Mar26° / 25°154.411.97.8
Apr27° / 26°275.512.37.1
May27° / 26°33712.66.7
Jun27° / 26°4711.112.76.2
Jul27° / 26°5713.212.66.1
Aug28° / 27°5613.212.45.9
Sep28° / 27°741512.15.1
Oct28° / 27°11418.611.74.7
Nov28° / 26°13720.111.44.9
Dec27° / 26°7615.611.36.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 53%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15446
25446
35446
45446
55347
65347
75347
85248
95248
105248
115149
125050
135050
145050
154852
164654
174654
184555
194456
204357
214357
224159
234159
244060
253961
263961
273961
283862
293862
303862

Chance of precipitation in September

Any precipitation

Kralendijk gets around 74 mm of rain over 15 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 49% and peaks near 56% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
142
243
343
444
544
645
746
846
947
1048
1148
1249
1349
1449
1550
1650
1751
1851
1951
2051
2152
2252
2352
2453
2553
2654
2754
2855
2955
3056

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the miserable band about 94% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
1694
2694
3694
4694
5595
6595
7595
8595
9595
10595
11595
12595
13595
14595
15694
16694
17694
18694
19793
20793
21793
22793
23793
24793
25793
26892
27892
28892
29892
30991

Wind in September

Winds average 26 km/h in September.

Across September, daily wind ranges from about 26 km/h on the calmest days to 27 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202530
Wind speed (km/h)Feels
127breezy
227breezy
327breezy
427breezy
527breezy
627breezy
727breezy
826breezy
926breezy
1026breezy
1126breezy
1226breezy
1326breezy
1426breezy
1526breezy
1626breezy
1726breezy
1826breezy
1926breezy
2026breezy
2126breezy
2226breezy
2326breezy
2426breezy
2526breezy
2626breezy
2726breezy
2826breezy
2926breezy
3026breezy

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 12 min at the start of September to 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over September. Sunrise moves from 6:26 AM to 6:25 AM, and sunset from 6:40 PM to 6:20 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.26:266:40
212.26:266:39
312.26:266:39
412.26:266:38
512.26:266:37
612.26:266:36
712.26:266:36
812.26:266:35
912.16:266:34
1012.16:266:34
1112.16:266:33
1212.16:256:32
1312.16:256:32
1412.16:256:31
1512.16:256:30
1612.16:256:29
1712.16:256:29
1812.06:256:28
1912.06:256:27
2012.06:256:27
2112.06:256:26
2212.06:256:25
2312.06:256:24
2412.06:256:24
2512.06:256:23
2612.06:256:22
2711.96:256:22
2811.96:256:21
2911.96:256:20
3011.96:256:20

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.16 kWh/m².

For context, solar energy here swings from a low near 4.94 kWh/m² to a high of 6.44 kWh/m² in April across the year — September's 6.16 kWh/m² falls in the middle.

0246151015202530
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
166.2Intense
176.1Intense
186.1Intense
196.1Intense
206.1Intense
216.0Intense
226.0Intense
236.0Bright
246.0Bright
255.9Bright
265.9Bright
275.9Bright
285.8Bright
295.8Bright
305.8Bright
Planning a trip in September

Hazard calendar for Kralendijk

In seasonPeak

In September, Kralendijk sits inside its atlantic hurricane and rainy season season. The full year is below, with each hazard's peak months called out.

Kralendijk sits in the Atlantic hurricane belt; the season peaks August–October.

Kralendijk's rainy season runs September–December, when most of the year's rain falls.

Atlantic hurricane
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Kralendijk?

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

5.1
Sightseeing
10th-best month of the year
6.1
Beach & pool
9th-best month of the year

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

What to pack for Kralendijk in September

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

In September, Kralendijk sees daytime highs around 28°C and nights near 27°C. Pack light clothes, rain gear and sun protection. Worth having: a windbreaker. About 15 days see rain.

light clothesrain gearsun protectiona windbreaker

Sea temperature near Kralendijk in September

The nearest coast averages about 29°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in September at about 29°C and coldest in February near 27°C.

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

26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb27Warm
Mar27Warm
Apr27Warm
May27Warm
Jun28Warm
Jul28Warm
Aug28Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec28Warm

UV index in Kralendijk in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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 Kralendijk peaks around March 19 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 13 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 highMar 19UV 13Dec 13UV 9
UV index (midday)Level
Jan11Extreme
Feb12Extreme
Mar14Extreme
Apr13Extreme
May12Extreme
Jun11Extreme
Jul11Extreme
Aug12Extreme
Sep12Extreme
Oct11Extreme
Nov9Very high
Dec9Very high

Air quality in Kralendijk in September

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Kralendijk is worst in June — around 32 µg/m³ PM2.5 (moderate), about 3.0× the cleanest month (January, 11 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJun 1631 µg/m³Jan 111 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar14Moderate
Apr20Moderate
May26Moderate
Jun32Moderate
Jul26Moderate
Aug20Moderate
Sep14Moderate
Oct14Moderate
Nov11Good
Dec11Good
Location & terrain

Where is Kralendijk?

Kralendijk sits at 12.2°N, 68.3°W, 4 m above sea level, in Bonaire, Saint Eustatius and Saba . The nearest listed city is Bandariba, 62 km away.

Topography around Kralendijk

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

Within 3 km, the terrain around Kralendijk has only modest variations in elevation — a maximum elevation change of 78 m around an average of 9 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 177 m; within 80 km, only modest variations in elevation — a maximum elevation change of 177 m.

The land around Kralendijk is covered by shrubs (26%), artificial surfaces (26%) and water (20%) within 3 km, water (76%) within 16 km, and water (96%) within 80 km.

3 km
78 m
16 km
177 m
80 km
177 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Bandariba 62 km · Willemstad 67 km · Puerto Cumarebo 139 km · Tucacas 151 km · La Vela de Coro 161 km · Los Roques 174 km · Coro 174 km · Yumare 178 km

Bonaire, Saint Eustatius and Saba travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B
127 V · 50 Hz

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 Kralendijk (12.15°, -68.2667°, elevation 4 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).