Greenville weather in May

In May, Greenville sees average daytime highs of 28°C and overnight lows near 25°C, with 294 mm of rain across 29.9 wet days and about 12.2 hours of daylight. It is the 5th-warmest and 3rd-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 2% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 12 h 12 min at the start of May to 12 h 18 min by month's end. Set against the rest of the year, May is Greenville's 11th-clearest and 7th-windiest month. For the whole year in context, see Greenville's year-round climate.

Daytime high
28°
5th warmest
Overnight low
25°
9th coldest
Rainfall
294 mm
29.9 wet days
Daylight
12 h 12 min
6:26 AM – 6:39 PM
Cloud cover
83%
11th clearest
Wind
9 km/h
7th windiest
Solar energy
4.46 kWh/m²
Travel score
3.3
out of 10

Greenville is capital of Sinoe County, Liberia.

Founded
1838

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

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

A typical May day in Greenville reaches about 28°C in the afternoon and slips back to 25°C overnight — a 3°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, May runs on par with April and about 1°C warmer than June.

20°23°25°28°30°151015202531
Avg high (°C)Avg low (°C)
12825
22825
32825
42825
52825
62825
72825
82825
92825
102825
112825
122825
132825
142825
152825
162825
172825
182825
192825
202825
212825
222825
232825
242825
252825
262825
272825
282725
292725
302725
312725

How May really feels in Greenville

Once humidity and wind are folded in, May averages 11 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
11
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

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

Greenville weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 25°9121.411.74.7
Feb28° / 25°10522.111.84.0
Mar28° / 25°13226.7123.6
Apr29° / 25°16027.112.13.3
May28° / 25°29429.912.23.3
Jun27° / 25°34527.612.33.7
Jul26° / 24°21822.212.34.5
Aug26° / 24°22623.512.24.4
Sep26° / 24°37328.6123.6
Oct27° / 24°22030.311.93.5
Nov28° / 24°14828.711.83.6
Dec28° / 25°11426.411.74.1

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 2% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 12% of May, with mostly cloudy or overcast conditions the remaining 86%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11783
21783
31783
41783
51684
61684
71684
81684
91585
101684
111684
121684
131684
141684
151684
161585
171585
181585
191486
201486
211486
221387
231387
241288
251288
261189
271189
281090
291090
301090
311090

Chance of precipitation in May

Any precipitation

Greenville gets around 294 mm of rain over 29.9 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 96% and peaks near 97% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
195
295
395
496
596
696
796
896
996
1096
1196
1296
1396
1496
1596
1696
1796
1897
1997
2097
2197
2297
2397
2497
2597
2697
2797
2897
2997
3097
3197

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the oppressive band about 71% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
15347
25446
35446
45545
55644
65743
75743
85842
95941
106040
116139
126238
136436
146535
156733
166931
177129
187228
197426
207624
217822
228020
238119
248317
258416
268614
278812
288911
299010
30919
31937

Wind in May

Winds average 9 km/h in May.

Across May, daily wind ranges from about 8 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
3110calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 12 min at the start of May to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over May. Sunrise moves from 6:28 AM to 6:26 AM, and sunset from 6:39 PM to 6:42 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.26:286:39
212.26:286:39
312.26:286:39
412.26:276:39
512.26:276:39
612.26:276:39
712.26:276:39
812.26:276:39
912.26:266:39
1012.26:266:39
1112.26:266:39
1212.26:266:39
1312.26:266:39
1412.26:266:39
1512.26:266:39
1612.26:266:39
1712.26:266:39
1812.26:256:39
1912.26:256:40
2012.26:256:40
2112.26:256:40
2212.26:256:40
2312.26:256:40
2412.36:256:40
2512.36:256:40
2612.36:256:41
2712.36:256:41
2812.36:256:41
2912.36:256:41
3012.36:256:41
3112.36:266:42

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.46 kWh/m².

For context, solar energy here swings from a low near 3.82 kWh/m² to a high of 5.06 kWh/m² in April across the year — May's 4.46 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.8Bright
54.8Bright
64.7Bright
74.7Bright
84.7Bright
94.7Bright
104.6Bright
114.6Bright
124.6Bright
134.5Bright
144.5Bright
154.5Bright
164.5Bright
174.4Bright
184.4Bright
194.4Bright
204.3Bright
214.3Bright
224.3Bright
234.2Bright
244.2Bright
254.2Bright
264.1Bright
274.1Bright
284.1Bright
294.0Bright
304.0Bright
314.0Bright
Planning a trip in May

Hazard calendar for Greenville

In seasonPeak

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

Greenville sees seasonal dust haze (February), heaviest in February.

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

Is May a good time to visit Greenville?

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

3.3
Sightseeing
11th-best month of the year
3.6
Beach & pool
10th-best month of the year

May is a weaker month for outdoor sightseeing in Greenville.

What to pack for Greenville in May

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

In May, Greenville sees daytime highs around 28°C and nights near 25°C. Pack light clothes and rain gear. About 30 days see rain.

light clothesrain gear

Sea temperature near Greenville in May

The nearest coast averages about 29°C in May — 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 May at about 29°C and coldest in August 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
Jan28Tropical
Feb28Warm
Mar28Warm
Apr29Tropical
May29Tropical
Jun28Tropical
Jul27Warm
Aug26Warm
Sep27Warm
Oct27Warm
Nov28Tropical
Dec29Tropical

UV index in Greenville in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Greenville peaks around April 19 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 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 highExtremeVery highApr 19UV 13Dec 15UV 9
UV index (midday)Level
Jan11Extreme
Feb13Extreme
Mar12Extreme
Apr13Extreme
May13Extreme
Jun10Very high
Jul9Very high
Aug11Extreme
Sep13Extreme
Oct12Extreme
Nov10Very high
Dec9Very high

Air quality in Greenville in May

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Greenville is worst in February — around 42 µg/m³ PM2.5 (poor), about 6.0× the cleanest month (September, 7 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModerateGoodModerateFeb 841 µg/m³Sep 167 µg/m³
PM2.5 (µg/m³)Level
Jan41Poor
Feb42Poor
Mar33Moderate
Apr29Moderate
May14Moderate
Jun13Moderate
Jul12Good
Aug9Good
Sep7Good
Oct9Good
Nov14Moderate
Dec32Moderate
Location & terrain

Where is Greenville?

Greenville sits at 5.0°N, 9.0°W, 10 m above sea level, in Liberia. The nearest listed city is Buchanan, 148 km away.

BuchananZwedruPleebo CityHarperPetit GraboParaTabouHarbel

Topography around Greenville

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

Within 3 km, the terrain around Greenville has only modest variations in elevation — a maximum elevation change of 23 m around an average of 4 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 88 m; within 80 km, significant variations in elevation — a maximum elevation change of 431 m.

The land around Greenville is covered by water (34%), trees (24%) and mangroves (21%) within 3 km, trees (48%) and water (48%) within 16 km, and trees (64%) and water (35%) within 80 km.

3 km
23 m
16 km
88 m
80 km
431 m
treesgrasslandartificial surfaceswatermangroves
May weather nearby: Buchanan 148 km · Zwedru 154 km · Pleebo City 159 km · Harper 163 km · Petit Grabo 193 km · Para 198 km · Tabou 198 km · Harbel 200 km

Liberia travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 0% of US
price level, 2025
GDP per capita
$915
2025
Happiness
4.3 / 10
World Happiness, 2025
Homicide rate
3.1
per 100k, 2012
Road deaths
38.9
per 100k/yr, 2019
Income group
Low
World Bank
Religion
Christian 85%Muslim 12%none 3%Traditional 1%

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 Greenville (5.0113°, -9.0388°, elevation 10 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).