May Pen weather in September

In September, May Pen sees average daytime highs of 31°C and overnight lows near 23°C, with 144 mm of rain across 21.5 wet days and about 12.1 hours of daylight. It is the 3rd-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 19% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 24 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is May Pen's 12th-clearest and 11th-windiest month. For the whole year in context, see May Pen's year-round climate.

Daytime high
31°
3rd warmest
Overnight low
23°
10th coldest
Rainfall
144 mm
21.5 wet days
Daylight
12 h 06 min
6:00 AM – 6:06 PM
Cloud cover
66%
12th clearest
Wind
7 km/h
11th windiest
Solar energy
5.74 kWh/m²
Travel score
3.2
out of 10

May Pen is city in Middlesex, Jamaica.

Founded
1660

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 31°C through the month.

A typical September day in May Pen reaches about 31°C in the afternoon and slips back to 23°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 33°C. Set against its neighbours, September runs about 1°C cooler than August and about 1°C warmer than October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13124
23124
33124
43124
53124
63124
73124
83124
93124
103124
113124
123124
133124
143124
153124
163124
173123
183123
193123
203123
213123
223123
233123
243123
253123
263023
273023
283023
293023
303023

How September really feels in May Pen

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.

May Pen weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 21°196.5116.7
Feb28° / 20°226.711.46.5
Mar29° / 21°388.911.96.0
Apr30° / 22°6111.912.45.1
May30° / 23°13218.512.84.1
Jun31° / 23°7514.313.14.1
Jul32° / 24°6213.2133.9
Aug32° / 24°9818.112.63.4
Sep31° / 23°14421.512.13.2
Oct30° / 23°13923.411.63.6
Nov29° / 22°7013.911.24.9
Dec29° / 21°337.810.96.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% of the time in September, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 22% of September, with mostly cloudy or overcast conditions the remaining 59%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14258
24258
34357
44357
54357
64456
74456
84456
94456
104357
114357
124258
134258
144258
154357
164258
174258
184159
194159
204159
214060
224060
233862
243862
253763
263763
273763
283763
293763
303763

Chance of precipitation in September

Any precipitation

May Pen gets around 144 mm of rain over 21.5 wet days in September, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 72% and peaks near 78% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
169
269
369
469
569
669
769
869
970
1070
1171
1271
1372
1472
1572
1672
1773
1873
1973
2074
2174
2274
2375
2475
2575
2676
2776
2877
2977
3078

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 92% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
17903
27903
37903
47894
57894
67894
77894
87894
97894
107894
116913
126913
136913
146913
155923
165923
175923
185923
194933
204933
214933
224933
234933
244933
253943
263943
273943
283943
293943
303943

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 24 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 30 minutes over September. Sunrise moves from 5:58 AM to 6:03 AM, and sunset from 6:19 PM to 5:54 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:586:19
212.35:586:19
312.35:586:18
412.35:586:17
512.35:596:16
612.35:596:15
712.35:596:14
812.25:596:13
912.25:596:13
1012.25:596:12
1112.26:006:11
1212.26:006:10
1312.26:006:09
1412.16:006:08
1512.16:006:07
1612.16:006:06
1712.16:006:05
1812.16:016:05
1912.06:016:04
2012.06:016:03
2112.06:016:02
2212.06:016:01
2312.06:016:00
2412.06:025:59
2511.96:025:58
2611.96:025:57
2711.96:025:57
2811.96:025:56
2911.96:025:55
3011.96:035:54

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.74 kWh/m².

For context, solar energy here swings from a low near 4.35 kWh/m² to a high of 6.66 kWh/m² in July across the year — September's 5.74 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.1Intense
26.1Intense
36.0Intense
46.0Intense
56.0Intense
66.0Intense
76.0Intense
86.0Bright
96.0Bright
105.9Bright
115.9Bright
125.9Bright
135.9Bright
145.8Bright
155.8Bright
165.8Bright
175.7Bright
185.7Bright
195.6Bright
205.6Bright
215.6Bright
225.5Bright
235.5Bright
245.4Bright
255.4Bright
265.3Bright
275.3Bright
285.3Bright
295.2Bright
305.2Bright
Planning a trip in September

Hazard calendar for May Pen

In seasonPeak

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

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

May Pen's rainy season runs August–November, 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 May Pen?

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

3.2
Sightseeing
12th-best month of the year
4.7
Beach & pool
12th-best month of the year

September is a weaker month for outdoor sightseeing in May Pen.

What to pack for May Pen in September

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

In September, May Pen sees daytime highs around 31°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 22 days see rain.

light clothesrain gearsun protection

Sea temperature near May Pen 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
Apr28Warm
May28Tropical
Jun28Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec28Tropical

UV index in May Pen 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 May Pen peaks around April 21 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 7 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highApr 21UV 12Dec 16UV 7
UV index (midday)Level
Jan8Very high
Feb11Extreme
Mar12Extreme
Apr13Extreme
May12Extreme
Jun12Extreme
Jul11Extreme
Aug12Extreme
Sep12Extreme
Oct11Extreme
Nov8Very high
Dec7Very high

Air quality in May Pen 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 May Pen is worst in June — around 35 µg/m³ PM2.5 (poor), about 2.1× the cleanest month (January, 17 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateJun 2335 µg/m³Jan 1117 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb17Moderate
Mar18Moderate
Apr18Moderate
May24Moderate
Jun35Poor
Jul34Moderate
Aug29Moderate
Sep23Moderate
Oct24Moderate
Nov20Moderate
Dec17Moderate
Location & terrain

Where is May Pen?

May Pen sits at 18.0°N, 77.2°W, 81 m above sea level, in Jamaica. The nearest listed city is Old Harbour, 15 km away.

Old HarbourMandevilleLinsteadSpanish TownPortmorePort RoyalHalf Way TreeKingston

Topography around May Pen

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

Within 3 km, the terrain around May Pen has only modest variations in elevation — a maximum elevation change of 100 m around an average of 74 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 734 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,229 m.

The land around May Pen is covered by trees (54%) and artificial surfaces (26%) within 3 km, trees (68%) and grassland (23%) within 16 km, and water (51%) and trees (40%) within 80 km.

3 km
100 m
16 km
734 m
80 km
2,229 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Old Harbour 15 km · Mandeville 29 km · Linstead 30 km · Spanish Town 31 km · Portmore 38 km · Port Royal 43 km · Half Way Tree 47 km · Kingston 48 km

Jamaica travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / B
110 V · 50 Hz
Prices
≈ 60% of US
price level, 2025
GDP per capita
$8,003
2025
Happiness
6.3 / 10
World Happiness, 2025
Homicide rate
49.4
per 100k, 2023
Road deaths
15.1
per 100k/yr, 2019
Income group
Upper middle
World Bank
Religion
Protestant 65%none 21%other 7%Roman Catholic 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 May Pen (17.9645°, -77.2451°, elevation 81 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).