New Amsterdam weather in September

In September, New Amsterdam sees average daytime highs of 29°C and overnight lows near 26°C, with 89 mm of rain across 16.8 wet days and about 12 hours of daylight. It is the 1st-warmest and 12th-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 51% of the time in September, and the air most often feels miserable.

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 New Amsterdam's 1st-clearest and 9th-windiest month. For the whole year in context, see New Amsterdam's year-round climate.

Daytime high
29°
1st warmest
Overnight low
26°
11th coldest
Rainfall
89 mm
16.8 wet days
Daylight
12 hours
5:43 AM – 5:45 PM
Cloud cover
44%
1st clearest
Wind
13 km/h
9th windiest
Solar energy
6.06 kWh/m²
Travel score
4.6
out of 10

New Amsterdam is city in Guyana.

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 29°C through the month.

A typical September day in New Amsterdam reaches about 29°C in the afternoon and slips back to 26°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 30°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)
12926
22926
32926
42926
52926
62926
72926
82926
92926
102926
112926
122926
132926
142926
152926
162926
172926
182926
192926
202926
212926
222926
232926
242926
252926
262926
272926
282926
292926
302926

How September really feels in New Amsterdam

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.

New Amsterdam weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 24°18223.511.74.5
Feb27° / 24°12919.311.84.9
Mar28° / 25°11419.1125.1
Apr28° / 25°16821.312.14.6
May28° / 25°33127.612.33.8
Jun28° / 25°37429.112.43.5
Jul28° / 24°28629.312.33.5
Aug29° / 25°16924.312.24.0
Sep29° / 26°8916.8124.6
Oct29° / 26°9717.211.94.6
Nov29° / 25°17822.811.74.0
Dec28° / 25°23626.711.64.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 51% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 21% of September, with mostly cloudy or overcast conditions the remaining 28%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17723
27723
37624
47624
57624
67624
77525
87426
97426
107327
117327
127228
137228
147129
157129
167129
177129
187129
197129
207129
217129
227030
237030
247030
257030
266931
276832
286733
296733
306634

Chance of precipitation in September

Any precipitation

New Amsterdam gets around 89 mm of rain over 16.8 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 57% and peaks near 60% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
160
259
359
459
559
659
759
859
959
1059
1159
1259
1359
1459
1559
1658
1758
1857
1957
2056
2155
2255
2354
2454
2554
2654
2754
2854
2954
3054

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 51% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
15644
25644
35545
45545
55446
65446
75446
85347
95347
105248
115248
125149
135149
145050
154951
164951
174852
184753
194753
204654
214654
224555
234555
244456
254456
264456
274456
284456
294456
304456

Wind in September

Winds average 13 km/h in September.

Across September, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
112calm
212calm
312calm
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze

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 5:46 AM to 5:41 AM, and sunset from 5:53 PM to 5:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.15:465:53
212.15:465:53
312.15:465:52
412.15:465:52
512.15:455:51
612.15:455:51
712.15:455:50
812.15:455:50
912.15:455:49
1012.15:455:49
1112.15:445:48
1212.15:445:48
1312.15:445:47
1412.05:445:46
1512.05:445:46
1612.05:435:45
1712.05:435:45
1812.05:435:44
1912.05:435:44
2012.05:435:43
2112.05:425:43
2212.05:425:42
2312.05:425:42
2412.05:425:41
2512.05:425:41
2612.05:415:40
2712.05:415:39
2812.05:415:39
2912.05:415:38
3012.05:415:38

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.06 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.52 kWh/m² to a high of 6.06 kWh/m² in September across the year — September's 6.06 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.0Bright
26.0Bright
36.0Bright
46.0Intense
56.0Intense
66.0Intense
76.0Intense
86.0Intense
96.0Intense
106.0Intense
116.0Intense
126.0Intense
136.0Intense
146.0Intense
156.0Intense
166.0Intense
176.0Intense
186.0Intense
196.0Intense
206.0Intense
216.0Intense
226.0Intense
236.0Intense
246.0Intense
256.0Intense
266.0Intense
276.0Intense
286.0Intense
296.0Intense
306.0Intense
Planning a trip in September

Is September a good time to visit New Amsterdam?

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

4.6
Sightseeing
3rd-best month of the year
6.0
Beach & pool
1st-best month of the year

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

What to pack for New Amsterdam in September

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

In September, New Amsterdam sees daytime highs around 29°C and nights near 26°C. Pack light clothes, rain gear and sun protection. About 17 days see rain.

light clothesrain gearsun protection

Sea temperature near New Amsterdam 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 at the nearest coast (about 21 km away) 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
May28Warm
Jun28Warm
Jul28Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov28Tropical
Dec28Warm

UV index in New Amsterdam 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 New Amsterdam peaks around March 22 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 12 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 22UV 15Dec 12UV 10
UV index (midday)Level
Jan12Extreme
Feb13Extreme
Mar15Extreme
Apr14Extreme
May13Extreme
Jun12Extreme
Jul12Extreme
Aug12Extreme
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec10Extreme

Air quality in New Amsterdam 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 New Amsterdam is worst in April — around 27 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (August, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateApr 1226 µg/m³Aug 1612 µg/m³
PM2.5 (µg/m³)Level
Jan20Moderate
Feb23Moderate
Mar25Moderate
Apr27Moderate
May21Moderate
Jun17Moderate
Jul13Moderate
Aug11Good
Sep13Moderate
Oct16Moderate
Nov15Moderate
Dec17Moderate
Location & terrain

Where is New Amsterdam?

New Amsterdam sits at 6.2°N, 57.5°W, 1 m above sea level, in Guyana. The nearest listed city is Linden, 92 km away.

LindenGeorgetownParikaBartica

Topography around New Amsterdam

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

Within 3 km, the terrain around New Amsterdam has only modest variations in elevation — a maximum elevation change of 20 m around an average of 3 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 36 m; within 80 km, only modest variations in elevation — a maximum elevation change of 86 m.

The land around New Amsterdam is covered by grassland (40%) and water (27%) within 3 km, grassland (37%) and water (20%) within 16 km, and trees (35%) and water (32%) within 80 km.

3 km
20 m
16 km
36 m
80 km
86 m
treesgrasslandcroplandartificial surfaceswaterwetlandmangroves
September weather nearby: Linden 92 km · Georgetown 94 km · Parika 120 km · Bartica 124 km · Weg naar Zee 258 km · Welgelegen 258 km · Lelydorp 260 km · Latour 260 km

Guyana travel facts

Travel advisory
Level 3
Reconsider Travel
Power plugs
Type A / B / D / G
240 V · 60 Hz
Prices
≈ 33% of US
price level, 2025
GDP per capita
$32,414
2025
Happiness
6.0 / 10
World Happiness, 2011
Safe drinking water
67%
of population, 2024
Homicide rate
19.1
per 100k, 2023
Road deaths
22.3
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 35%Hindu 25%other Christian 21%Roman Catholic 7%

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 New Amsterdam (6.2492°, -57.5158°, elevation 1 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).