Simpsonville weather in May

In May, Simpsonville sees average daytime highs of 80°F and overnight lows near 60°F, with 3.3 in of rain across 10 wet days and about 13.8 hours of daylight. It is the 5th-warmest and 11th-wettest month of the year here.

Highs climb over the month, from about 76°F in the first days to 83°F by the end. The sky is clear or mostly clear about 33% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 24 min at the start of May to 14 h 06 min by month's end. Set against the rest of the year, May is Simpsonville's 8th-clearest and 6th-windiest month. For the whole year in context, see Simpsonville's year-round climate.

Daytime high
80°
5th warmest
Overnight low
60°
8th coldest
Rainfall
3.3 in
10 wet days
Daylight
13 h 48 min
5:31 AM – 7:20 PM
Cloud cover
57%
8th clearest
Wind
6 mph
6th windiest
Solar energy
6.07 kWh/m²
Travel score
6.6
out of 10

Simpsonville is city in Greenville County, South Carolina, United States of America.

Density
897/km²
people per km²

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 76°F in the first days to 83°F by the end.

A typical May day in Simpsonville reaches about 80°F in the afternoon and slips back to 60°F overnight — a 20°F spread between the day's warmth and the night's chill. On most days the high lands between 70°F and 88°F. Set against its neighbours, May runs about 7°F warmer than April and about 7°F cooler than June.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
17655
27655
37656
47656
57756
67757
77757
87857
97858
107858
117858
127958
137959
147959
157959
168060
178060
188060
198060
208061
218161
228162
238162
248262
258262
268263
278263
288364
298364
308364
318364

How May really feels in Simpsonville

Once humidity and wind are folded in, May averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
0
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

May sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Simpsonville weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan52° / 34°4.29.819.92.8
Feb56° / 36°3.88.70.810.73.8
Mar63° / 42°4.610.20.311.75.7
Apr72° / 51°3.88.8012.86.9
May80° / 60°3.310013.86.6
Jun86° / 68°3.912.9014.34.6
Jul89° / 71°3.813.9014.13.7
Aug87° / 70°4.212.5013.34.3
Sep82° / 64°3.78.6012.26.3
Oct72° / 52°3.17011.17.3
Nov62° / 41°3.67.8010.25.7
Dec54° / 36°4.29.30.59.73.4

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 19% of May, with mostly cloudy or overcast conditions the remaining 48%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15446
25446
35446
45446
55545
65446
75446
85446
95347
105347
115347
125347
135248
145248
155248
165248
175248
185149
195149
205050
215149
225149
235050
245050
255050
265149
275149
285050
295050
305050
314951

Chance of precipitation in May

Any precipitation

Simpsonville gets around 3.3 in of rain over 10 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 33% and peaks near 39% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
132
231
331
431
531
631
730
830
930
1030
1130
1230
1330
1430
1530
1631
1731
1831
1932
2032
2133
2234
2334
2435
2535
2636
2736
2837
2937
3038
3139

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the dry band about 36% of days. Sticky, muggy-or-worse air turns up on roughly 16% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
157221740
256221840
353231950
452232050
550232160
648242260
746242370
845242480
943242580
1042242590
1141242690
12392427100
13382427110
14372427120
15362427130
16352428140
17342328150
18332328161
19322328171
20312328181
21302328191
22282328202
23272228212
24262227222
25242227233
26232227243
27222227264
28212127274
29192127295
30182026305
31171926326

Wind in May

Winds average 6 mph in May.

Across May, daily wind ranges from about 5 mph on the calmest days to 6 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 24 min at the start of May to 14 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 42 minutes over May. Sunrise moves from 5:45 AM to 5:22 AM, and sunset from 7:08 PM to 7:30 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.45:457:08
213.45:447:08
313.45:437:09
413.55:427:10
513.55:417:11
613.55:407:12
713.65:397:12
813.65:387:13
913.65:377:14
1013.65:367:15
1113.75:357:16
1213.75:347:16
1313.75:337:17
1413.85:327:18
1513.85:327:19
1613.85:317:20
1713.85:307:20
1813.95:297:21
1913.95:297:22
2013.95:287:23
2113.95:277:23
2214.05:277:24
2314.05:267:25
2414.05:267:26
2514.05:257:26
2614.05:257:27
2714.15:247:28
2814.15:247:28
2914.15:237:29
3014.15:237:30
3114.15:227:30

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 6.07 kWh/m².

For context, solar energy here swings from a low near 2.3 kWh/m² to a high of 6.19 kWh/m² in June across the year — May's 6.07 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
36.0Bright
46.0Bright
56.0Bright
66.0Intense
76.0Intense
86.0Intense
96.1Intense
106.1Intense
116.1Intense
126.1Intense
136.1Intense
146.1Intense
156.1Intense
166.1Intense
176.1Intense
186.1Intense
196.1Intense
206.1Intense
216.1Intense
226.1Intense
236.1Intense
246.1Intense
256.1Intense
266.1Intense
276.0Intense
286.0Intense
296.0Intense
306.0Intense
316.0Intense
Planning a trip in May

Is May a good time to visit Simpsonville?

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

6.6
Sightseeing
3rd-best month of the year
6.5
Beach & pool
2nd-best month of the year

May is a reasonable time to visit Simpsonville for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Simpsonville in May

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

In May, Simpsonville sees daytime highs around 80°F and nights near 60°F. Pack sun protection. Worth having: light clothes and rain gear. About 10 days see rain.

sun protectionlight clothesrain gear

UV index in Simpsonville in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Simpsonville peaks around July 10 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJul 10UV 9Dec 20UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr7High
May8Very high
Jun9Very high
Jul10Very high
Aug8Very high
Sep7High
Oct5Moderate
Nov4Moderate
Dec2Moderate

Air quality in Simpsonville 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 Simpsonville is worst in July — around 19 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (January, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodGoodModerateGoodJul 1718 µg/m³Jan 118 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb10Good
Mar12Moderate
Apr11Good
May13Moderate
Jun16Moderate
Jul19Moderate
Aug16Moderate
Sep12Moderate
Oct9Good
Nov10Good
Dec8Good
Location & terrain

Where is Simpsonville?

Simpsonville sits at 34.7°N, 82.3°W, 860 ft above sea level, in United States. The nearest listed city is Mauldin, 4.3 mi away.

Topography around Simpsonville

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Simpsonville.

Within 2 miles, the terrain around Simpsonville has only modest variations in elevation — a maximum elevation change of 213 ft around an average of 860 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 646 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 4,505 ft.

The land around Simpsonville is covered by trees (57%) and artificial surfaces (22%) within 2 miles, trees (63%) and grassland (25%) within 10 miles, and trees (81%) within 50 miles.

2 miles
213 ft
10 miles
646 ft
50 miles
4,505 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Mauldin 4.3 mi · Greenville 11 mi · Wade Hampton 12 mi · Taylors 13 mi · Greer 14 mi · Easley 21 mi · Spartanburg 24 mi · Anderson 28 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 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 Simpsonville (34.7371°, -82.2543°, elevation 860 ft), 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. 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).