Fleming Island weather in May

In May, Fleming Island sees average daytime highs of 85°F and overnight lows near 66°F, with 2.9 in of rain across 9.1 wet days and about 13.5 hours of daylight. It is the 5th-warmest and 6th-wettest month of the year here.

Highs climb over the month, from about 83°F in the first days to 87°F by the end. The sky is clear or mostly clear about 40% of the time in May, and the air most often feels muggy.

Daylight stretches from about 13 h 06 min at the start of May to 13 h 48 min by month's end. Set against the rest of the year, May is Fleming Island's 2nd-clearest and 8th-windiest month. For the whole year in context, see Fleming Island's year-round climate.

Daytime high
85°
5th warmest
Overnight low
66°
8th coldest
Rainfall
2.9 in
9.1 wet days
Daylight
13 h 30 min
5:38 AM – 7:08 PM
Cloud cover
50%
2nd clearest
Wind
6 mph
8th windiest
Solar energy
6.32 kWh/m²
Travel score
5.5
out of 10

Fleming Island is census-designated place in Clay County, Florida.

Density
453/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 83°F in the first days to 87°F by the end.

A typical May day in Fleming Island reaches about 85°F in the afternoon and slips back to 66°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 78°F and 91°F. Set against its neighbours, May runs about 6°F warmer than April and about 3°F cooler than June.

50°60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18262
28363
38363
48363
58363
68364
78464
88464
98464
108465
118465
128565
138565
148565
158566
168566
178566
188567
198567
208667
218667
228667
238668
248668
258668
268669
278769
288769
298769
308770
318770

How May really feels in Fleming Island

Once humidity and wind are folded in, May averages 3 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
3
heat index over the day's high
Days feeling ≤ 32°F
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.

Fleming Island weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan66° / 46°2.67.310.36.5
Feb69° / 49°2.46.610.96.8
Mar74° / 53°2.97.311.87.4
Apr79° / 59°2.3712.77.2
May85° / 66°2.99.113.55.5
Jun88° / 72°5.418.813.93.4
Jul90° / 74°5.521.113.72.9
Aug89° / 74°6.222.313.13.0
Sep86° / 72°5.116.512.24.2
Oct80° / 64°2.89.211.36.7
Nov73° / 55°1.6610.57.5
Dec68° / 49°2.26.910.16.8

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 40% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 21% of May, with mostly cloudy or overcast conditions the remaining 39%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16535
26436
36436
46436
56436
66535
76436
86436
96337
106337
116337
126337
136337
146238
156337
166238
176238
186238
196139
206139
216040
226040
235941
245941
255941
265743
275644
285545
295446
305248
315149

Chance of precipitation in May

Any precipitation

Fleming Island gets around 2.9 in of rain over 9.1 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 30% and peaks near 49% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
122
222
321
421
521
621
722
822
923
1023
1124
1225
1325
1426
1527
1628
1729
1830
1931
2032
2133
2235
2336
2437
2539
2640
2742
2843
2945
3047
3149

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the muggy band about 36% of days. Sticky, muggy-or-worse air turns up on roughly 50% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1232127263
2222127273
3212127283
4202027293
5192027303
6182028314
7172028324
8161928324
9151929335
10141829335
11131830346
12131730346
13121630357
14111530368
15101430369
16101430379
17913303810
18812303811
19812293913
20711293914
21710284015
22610274117
2359264118
2458254220
2547234322
2647224325
2736214327
2836194329
2925184232
3025174235
3114164138

Wind in May

Winds average 6 mph in May.

Across May, daily wind ranges from about 6 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
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 06 min at the start of May to 13 h 48 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 5:50 AM to 5:31 AM, and sunset from 6:59 PM to 7:18 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.15:506:59
213.25:496:59
313.25:487:00
413.25:477:01
513.35:467:01
613.35:457:02
713.35:447:03
813.35:447:03
913.45:437:04
1013.45:427:04
1113.45:417:05
1213.45:417:06
1313.45:407:06
1413.55:397:07
1513.55:387:08
1613.55:387:08
1713.55:377:09
1813.65:377:10
1913.65:367:10
2013.65:357:11
2113.65:357:12
2213.65:347:12
2313.65:347:13
2413.75:337:14
2513.75:337:14
2613.75:337:15
2713.75:327:15
2813.75:327:16
2913.75:327:16
3013.85:317:17
3113.85:317:18

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 6.32 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.81 kWh/m² to a high of 6.32 kWh/m² in May across the year — May's 6.32 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.3Intense
26.3Intense
36.3Intense
46.3Intense
56.4Intense
66.4Intense
76.4Intense
86.4Intense
96.4Intense
106.4Intense
116.4Intense
126.4Intense
136.3Intense
146.3Intense
156.3Intense
166.3Intense
176.3Intense
186.3Intense
196.3Intense
206.3Intense
216.2Intense
226.2Intense
236.2Intense
246.2Intense
256.2Intense
266.1Intense
276.1Intense
286.1Intense
296.1Intense
306.0Intense
316.0Intense
Planning a trip in May

Hazard calendar for Fleming Island

In seasonPeak

In May, Fleming Island sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Fleming Island sits in the Atlantic hurricane belt; the season peaks August–October.

Fleming Island's rainy season runs May–October, 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 May a good time to visit Fleming Island?

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

5.5
Sightseeing
8th-best month of the year
7.1
Beach & pool
1st-best month of the year

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

What to pack for Fleming Island in May

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

In May, Fleming Island sees daytime highs around 85°F and nights near 66°F. Pack light clothes and sun protection. Worth having: rain gear. About 9 days see rain.

light clothessun protectionrain gear

Sea temperature near Fleming Island in May

The nearest coast averages about 75°F 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 29 mi away) is warmest in August at about 82°F and coldest in February near 61°F.

It's comfortable for a long swim from Apr 13 to Nov 28 — about 7.6 months when the water holds above 68°F.

60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan62Cool
Feb61Cool
Mar63Cool
Apr69Refreshing
May75Refreshing
Jun80Warm
Jul82Warm
Aug82Tropical
Sep82Warm
Oct78Warm
Nov70Refreshing
Dec65Cool

UV index in Fleming Island in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Fleming Island peaks around June 21 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJun 21UV 11Dec 19UV 4
UV index (midday)Level
Jan4Moderate
Feb6High
Mar7Very high
Apr7High
May9Very high
Jun11Extreme
Jul10Extreme
Aug10Very high
Sep8Very high
Oct6High
Nov5Moderate
Dec4Moderate

Air quality in Fleming Island 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 Fleming Island is worst in July — around 18 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (December, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1618 µg/m³Dec 138 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb13Moderate
Mar12Moderate
Apr13Moderate
May14Moderate
Jun16Moderate
Jul18Moderate
Aug16Moderate
Sep12Good
Oct8Good
Nov8Good
Dec7Good
Location & terrain

Where is Fleming Island?

Fleming Island sits at 30.1°N, 81.7°W, 20 ft above sea level, in United States. The nearest listed city is Lakeside, 3.7 mi away.

Topography around Fleming Island

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

Within 2 miles, the terrain around Fleming Island has only modest variations in elevation — a maximum elevation change of 79 ft around an average of 23 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 164 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 308 ft.

The land around Fleming Island is covered by trees (61%) within 2 miles, trees (59%) within 10 miles, and trees (65%) and water (23%) within 50 miles.

2 miles
79 ft
10 miles
164 ft
50 miles
308 ft
treesgrasslandcroplandartificial surfaceswaterwetland
May weather nearby: Lakeside 3.7 mi · Fruit Cove 5.0 mi · Oakleaf Plantation 8.7 mi · St. Johns 11 mi · Jacksonville 17 mi · Palm Valley 21 mi · Ponte Vedra Beach 22 mi · Jacksonville Beach 24 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 Fleming Island (30.0933°, -81.719°, elevation 20 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. 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).