Blauwgrond weather in September

In September, Blauwgrond sees average daytime highs of 32°C and overnight lows near 24°C, with 78 mm of rain across 13.7 wet days and about 12 hours of daylight. It is the 2nd-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 44% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 06 min at the start of September to 12 hours by month's end. Set against the rest of the year, September is Blauwgrond's 1st-clearest and 9th-windiest month. For the whole year in context, see Blauwgrond's year-round climate.

Daytime high
32°
2nd warmest
Overnight low
24°
9th coldest
Rainfall
78 mm
13.7 wet days
Daylight
12 hours
6:34 AM – 6:36 PM
Cloud cover
46%
1st clearest
Wind
9 km/h
9th windiest
Solar energy
6.42 kWh/m²
Travel score
3.7
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 32°C through the month.

A typical September day in Blauwgrond reaches about 32°C in the afternoon and slips back to 24°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 31°C and 33°C. Set against its neighbours, September runs on par with August and on par with October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13224
23224
33224
43224
53224
63224
73224
83224
93224
103224
113224
123224
133224
143224
153224
163224
173224
183224
193224
203224
213224
223224
233224
243224
253224
263224
273224
283224
293224
303224

How September really feels in Blauwgrond

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.

Blauwgrond weather by month

How September compares with the rest of the year at a glance. September is the 2nd-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 23°12219.411.74.1
Feb29° / 23°9116.111.84.3
Mar30° / 23°8616.7124.2
Apr30° / 24°15820.512.13.6
May30° / 24°2772712.33.0
Jun30° / 23°31228.312.32.7
Jul31° / 23°24526.512.33.0
Aug31° / 23°1482012.23.4
Sep32° / 24°7813.7123.7
Oct32° / 24°8414.211.93.6
Nov31° / 24°13520.411.73.3
Dec30° / 23°15623.811.73.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 44% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 29% of September, with mostly cloudy or overcast conditions the remaining 27%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17624
27624
37723
47723
57723
67723
77624
87624
97624
107525
117426
127426
137327
147327
157327
167327
177327
187129
197129
207129
217129
227129
237228
247129
257129
267129
277129
287030
296931
306931

Chance of precipitation in September

Any precipitation

Blauwgrond gets around 78 mm of rain over 13.7 wet days in September, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 46% and peaks near 48% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
148
247
347
447
547
647
747
847
947
1048
1148
1248
1348
1448
1548
1647
1747
1847
1946
2046
2146
2245
2345
2444
2544
2644
2744
2844
2944
3044

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 68% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
107030
207129
307129
407129
507129
607129
707129
807030
907030
1007030
1106931
1206931
1306931
1406931
1506832
1616732
1716732
1816732
1916732
2016732
2116732
2216732
2316732
2416732
2516732
2616732
2716732
2816831
2916831
3016831

Wind in September

Winds average 9 km/h in September.

Across September, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 06 min at the start of September to 12 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over September. Sunrise moves from 6:37 AM to 6:31 AM, and sunset from 6:44 PM to 6:28 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.16:376:44
212.16:376:43
312.16:366:43
412.16:366:42
512.16:366:42
612.16:366:41
712.16:366:41
812.16:356:40
912.16:356:39
1012.16:356:39
1112.16:356:38
1212.16:356:38
1312.06:346:37
1412.06:346:37
1512.06:346:36
1612.06:346:36
1712.06:346:35
1812.06:336:35
1912.06:336:34
2012.06:336:34
2112.06:336:33
2212.06:336:33
2312.06:326:32
2412.06:326:31
2512.06:326:31
2612.06:326:30
2712.06:326:30
2812.06:316:29
2912.06:316:29
3012.06:316:28

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.42 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.74 kWh/m² to a high of 6.42 kWh/m² in September across the year — September's 6.42 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.3Intense
26.3Intense
36.3Intense
46.4Intense
56.4Intense
66.4Intense
76.4Intense
86.4Intense
96.4Intense
106.4Intense
116.4Intense
126.4Intense
136.4Intense
146.4Intense
156.4Intense
166.4Intense
176.4Intense
186.4Intense
196.4Intense
206.4Intense
216.4Intense
226.4Intense
236.4Intense
246.4Intense
256.4Intense
266.4Intense
276.4Intense
286.4Intense
296.4Intense
306.4Intense
Planning a trip in September

Hazard calendar for Blauwgrond

In seasonPeak

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

Blauwgrond's rainy season runs April–August, when most of the year's rain falls.

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

Is September a good time to visit Blauwgrond?

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

3.7
Sightseeing
4th-best month of the year
6.0
Beach & pool
1st-best month of the year

September is a weaker month for outdoor sightseeing in Blauwgrond.

What to pack for Blauwgrond in September

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

In September, Blauwgrond sees daytime highs around 32°C and nights near 24°C. Pack light clothes, rain gear and sun protection. About 14 days see rain.

light clothesrain gearsun protection

Sea temperature near Blauwgrond in September

The nearest coast averages about 28°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 31 km away) is warmest in August at about 28°C and coldest in February near 26°C.

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

24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan26Warm
Feb26Warm
Mar27Warm
Apr27Warm
May27Warm
Jun27Warm
Jul28Warm
Aug28Tropical
Sep28Tropical
Oct28Tropical
Nov28Warm
Dec27Warm

UV index in Blauwgrond 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 Blauwgrond peaks around March 20 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 11 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 20UV 15Dec 11UV 10
UV index (midday)Level
Jan13Extreme
Feb13Extreme
Mar15Extreme
Apr14Extreme
May13Extreme
Jun11Extreme
Jul11Extreme
Aug11Extreme
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec10Extreme

Air quality in Blauwgrond 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 Blauwgrond is worst in April — around 25 µg/m³ PM2.5 (moderate), about 3.3× the cleanest month (August, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateApr 1125 µg/m³Aug 198 µg/m³
PM2.5 (µg/m³)Level
Jan23Moderate
Feb25Moderate
Mar24Moderate
Apr25Moderate
May22Moderate
Jun15Moderate
Jul9Good
Aug8Good
Sep9Good
Oct10Good
Nov12Moderate
Dec19Moderate
Location & terrain

Where is Blauwgrond?

Blauwgrond sits at 5.8°N, 55.1°W, 4 m above sea level, in Suriname. The nearest listed city is Rainville, 2.0 km away.

Topography around Blauwgrond

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

Within 3 km, the terrain around Blauwgrond has only modest variations in elevation — a maximum elevation change of 13 m around an average of 1 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 32 m; within 80 km, significant variations in elevation — a maximum elevation change of 290 m.

The land around Blauwgrond is covered by water (40%), artificial surfaces (30%) and grassland (24%) within 3 km, trees (33%) and grassland (25%) within 16 km, and trees (59%) and water (29%) within 80 km.

3 km
13 m
16 km
32 m
80 km
290 m
treesgrasslandartificial surfaceswaterwetlandmangroves
September weather nearby: Rainville 2.0 km · Paramaribo 6.0 km · Munder Buiten 7.0 km · Beekhuizen 7.0 km · Tammenga 9.0 km · Flora 10 km · Welgelegen 11 km · Weg naar Zee 11 km

Suriname travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / F
127 / 220 V · 60 Hz
Prices
≈ 31% of US
price level, 2025
GDP per capita
$7,070
2025
Happiness
6.3 / 10
World Happiness, 2015
Safe drinking water
56%
of population, 2024
Homicide rate
6.5
per 100k, 2023
Road deaths
15.3
per 100k/yr, 2019
Income group
Upper middle
World Bank
Religion
Protestant 24%Hindu 22%Roman Catholic 22%Muslim 14%

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 Blauwgrond (5.8434°, -55.1193°, 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. 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).