Saint George's weather in September

In September, Saint George's sees average daytime highs of 28°C and overnight lows near 26°C, with 143 mm of rain across 20.2 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 33% 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 Saint George's's 10th-clearest and 12th-windiest month. For the whole year in context, see Saint George's's year-round climate.

Daytime high
28°
1st warmest
Overnight low
26°
12th coldest
Rainfall
143 mm
20.2 wet days
Daylight
12 h 06 min
5:59 AM – 6:03 PM
Cloud cover
60%
10th clearest
Wind
21 km/h
12th windiest
Solar energy
5.87 kWh/m²
Travel score
4.4
out of 10

Saint George's is capital of Grenada.

Founded
1650

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 Saint George's reaches about 28°C in the afternoon and slips back to 26°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 27°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)
12826
22826
32826
42826
52826
62826
72826
82826
92826
102826
112826
122826
132826
142826
152826
162826
172826
182826
192827
202827
212827
222827
232827
242827
252827
262827
272827
282827
292826
302826

How September really feels in Saint George's

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.

Saint George's 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°4812.111.46.8
Feb26° / 25°227.611.67.3
Mar26° / 25°266.311.97.5
Apr27° / 26°317.412.37.0
May27° / 26°5511.912.56.2
Jun27° / 26°11719.312.75.0
Jul27° / 26°14223.212.64.7
Aug28° / 26°15623.812.44.5
Sep28° / 26°14320.212.14.4
Oct28° / 26°1602311.74.4
Nov28° / 26°1612211.44.7
Dec27° / 26°7615.211.36.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 52%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15842
25842
35743
45743
55644
65545
75446
85347
95347
105149
115050
124852
134753
144654
154654
164456
174456
184456
194456
204456
214456
224456
234456
244357
254357
264357
274357
284357
294258
304159

Chance of precipitation in September

Any precipitation

Saint George's gets around 143 mm of rain over 20.2 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 69% and peaks near 73% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
166
265
365
465
565
666
766
867
967
1068
1168
1269
1369
1470
1570
1670
1770
1870
1970
2070
2170
2270
2370
2470
2570
2670
2771
2871
2972
3073

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 58% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
14654
24555
34555
44456
54357
64357
74258
84258
94258
104159
114159
124159
134159
144159
154159
164060
174060
184060
194060
204159
214159
224159
234159
244258
254258
264258
274258
284258
294258
304357

Wind in September

Winds average 21 km/h in September, the calmest month.

Across September, daily wind ranges from about 21 km/h on the calmest days to 22 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
121breezy
221breezy
321breezy
421breezy
521breezy
621breezy
721breezy
821breezy
921breezy
1021breezy
1121breezy
1221breezy
1321breezy
1421breezy
1521breezy
1621breezy
1721breezy
1821breezy
1921breezy
2021breezy
2121breezy
2221breezy
2321breezy
2421breezy
2522breezy
2622breezy
2722breezy
2822breezy
2922breezy
3022breezy

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 6:00 AM to 5:59 AM, and sunset from 6:14 PM to 5:53 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.26:006:14
212.26:006:13
312.26:006:12
412.26:006:12
512.26:006:11
612.26:006:10
712.26:006:10
812.26:006:09
912.16:006:08
1012.16:006:08
1112.15:596:07
1212.15:596:06
1312.15:596:05
1412.15:596:05
1512.15:596:04
1612.15:596:03
1712.15:596:03
1812.05:596:02
1912.05:596:01
2012.05:596:00
2112.05:596:00
2212.05:595:59
2312.05:595:58
2412.05:595:58
2512.05:595:57
2612.05:595:56
2711.95:595:56
2811.95:595:55
2911.95:595:54
3011.95:595:53

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.87 kWh/m².

For context, solar energy here swings from a low near 4.97 kWh/m² to a high of 6.57 kWh/m² in April across the year — September's 5.87 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.0Intense
26.0Intense
36.0Intense
46.0Intense
56.0Intense
66.0Intense
76.0Bright
86.0Bright
96.0Bright
105.9Bright
115.9Bright
125.9Bright
135.9Bright
145.9Bright
155.9Bright
165.8Bright
175.8Bright
185.8Bright
195.8Bright
205.8Bright
215.8Bright
225.8Bright
235.7Bright
245.7Bright
255.7Bright
265.7Bright
275.7Bright
285.7Bright
295.7Bright
305.6Bright
Planning a trip in September

Hazard calendar for Saint George's

In seasonPeak

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

Saint George's sits in the Atlantic hurricane belt; the season peaks August–October.

Saint George's's rainy season runs June–December, when most of the year's rain falls.

Saint George's sees seasonal dust haze (June), heaviest in June.

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

Is September a good time to visit Saint George's?

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

4.4
Sightseeing
11th-best month of the year
5.2
Beach & pool
8th-best month of the year

September is a reasonable time to visit Saint George's for sightseeing.

What to pack for Saint George's in September

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

In September, Saint George's sees daytime highs around 28°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection and a windbreaker. About 20 days see rain.

light clothesrain gearsun protectiona windbreaker

Sea temperature near Saint George's 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 16 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
Nov29Tropical
Dec28Warm

UV index in Saint George's 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 Saint George's peaks around March 22 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 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 22UV 14Dec 14UV 9
UV index (midday)Level
Jan10Extreme
Feb12Extreme
Mar14Extreme
Apr14Extreme
May12Extreme
Jun11Extreme
Jul11Extreme
Aug11Extreme
Sep12Extreme
Oct11Extreme
Nov9Very high
Dec9Very high

Air quality in Saint George's 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 Saint George's is worst in June — around 32 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (January, 13 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateJun 1731 µg/m³Jan 913 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb16Moderate
Mar16Moderate
Apr19Moderate
May23Moderate
Jun32Moderate
Jul26Moderate
Aug19Moderate
Sep14Moderate
Oct17Moderate
Nov13Moderate
Dec13Moderate
Location & terrain

Where is Saint George's?

Saint George's sits at 12.1°N, 61.8°W, 6 m above sea level, in Grenada. The nearest listed city is Calliaqua, 134 km away.

Topography around Saint George's

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Saint George's.

Within 3 km, the terrain around Saint George's has significant variations in elevation — a maximum elevation change of 327 m around an average of 55 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 827 m; within 80 km, large variations in elevation — a maximum elevation change of 799 m.

The land around Saint George's is covered by water (46%) and trees (43%) within 3 km, water (71%) and trees (27%) within 16 km, and water (96%) within 80 km.

3 km
327 m
16 km
827 m
80 km
799 m
treesgrasslandartificial surfaceswater
September weather nearby: Calliaqua 134 km · Kingstown 135 km · Scarborough 147 km · Diego Martin 150 km · Port of Spain 156 km · Laventille 159 km · Tunapuna 161 km · Paradise 161 km

Grenada travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type G
230 V · 50 Hz
Prices
≈ 57% of US
price level, 2025
GDP per capita
$12,107
2025
Safe drinking water
90%
of population, 2017
Homicide rate
13.7
per 100k, 2023
Road deaths
8
per 100k/yr, 2019
Income group
Upper middle
World Bank
Religion
Protestant 49%Roman Catholic 36%none 6%other 6%

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 Saint George's (12.0529°, -61.7523°, elevation 6 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).