St. Johns weather in July

In July, St. Johns sees average daytime highs of 88°F and overnight lows near 76°F, with 4.8 in of rain across 20.1 wet days and about 13.7 hours of daylight. It is the 1st-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 88°F through the month. The sky is clear or mostly clear about 22% of the time in July, and the air most often feels oppressive.

Daylight stretches from about 13 h 54 min at the start of July to 13 h 30 min by month's end. Set against the rest of the year, July is St. Johns's 11th-clearest and 12th-windiest month. For the whole year in context, see St. Johns's year-round climate.

Daytime high
88°
1st warmest
Overnight low
76°
11th coldest
Rainfall
4.8 in
20.1 wet days
Daylight
13 h 48 min
5:39 AM – 7:25 PM
Cloud cover
63%
11th clearest
Wind
6 mph
12th windiest
Solar energy
6.09 kWh/m²
Travel score
3.4
out of 10

St. Johns is unincorporated community in St. Johns County, Florida, United States.

Founded
2005

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

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 88°F through the month.

A typical July day in St. Johns reaches about 88°F in the afternoon and slips back to 76°F overnight — a 12°F spread between the day's warmth and the night's chill. On most days the high lands between 84°F and 92°F. Set against its neighbours, July runs about 2°F warmer than June and on par with August.

70°80°90°151015202531
Avg high (°F)Avg low (°F)
18875
28875
38876
48876
58876
68876
78876
88876
98876
108876
118876
128876
138876
148876
158876
168876
178876
188876
198876
208876
218876
228876
238876
248876
258876
268876
278876
288876
298876
308876
318876

How July really feels in St. Johns

Once humidity and wind are folded in, July averages 31 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
31
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

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

St. Johns weather by month

How July compares with the rest of the year at a glance. July is the 1st-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan65° / 49°2.57.710.36.4
Feb67° / 52°2.56.910.96.6
Mar72° / 56°2.87.311.87.2
Apr77° / 62°2.16.712.77.5
May83° / 69°2.58.713.56.3
Jun86° / 74°5.017.613.94.0
Jul88° / 76°4.820.113.73.4
Aug87° / 76°5.721.213.13.4
Sep84° / 74°5.517.212.24.5
Oct79° / 67°3.29.811.36.8
Nov72° / 58°1.76.210.57.4
Dec67° / 53°2.26.710.16.7

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 20% of July, with mostly cloudy or overcast conditions the remaining 57%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14357
24258
34357
44357
54456
64456
74555
84555
94555
104654
114654
124654
134654
144654
154654
164456
174456
184456
194357
204357
214258
224258
234159
244159
254060
263961
273961
283961
293862
303862
313961

Chance of precipitation in July

Any precipitation

St. Johns gets around 4.8 in of rain over 20.1 wet days in July. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 66% and peaks near 69% on the wettest days.

0%20%40%60%80%151015202531
Rain chance (%)
164
264
364
464
564
664
764
864
964
1064
1165
1265
1365
1465
1565
1665
1765
1866
1966
2066
2166
2266
2366
2467
2567
2668
2768
2868
2969
3069
3169

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July 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
Muggy (%)Oppressive (%)Miserable (%)
138512
238413
338314
438215
528216
628018
727919
827820
927622
1027523
1127325
1227226
1327127
1426929
1526830
1626731
1726632
1826632
1926533
2026533
2116633
2216633
2316633
2416633
2516633
2616633
2716633
2816633
2916534
3016534
3116435

Wind in July

Winds average 6 mph in July, the calmest month.

Across July, 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 July

DaylightNight

Daylight runs from about 13 h 54 min at the start of July to 13 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 24 minutes over July. Sunrise moves from 5:32 AM to 5:48 AM, and sunset from 7:27 PM to 7:17 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.95:327:27
213.95:327:27
313.95:337:27
413.95:337:27
513.95:347:27
613.95:347:27
713.95:347:27
813.95:357:27
913.95:357:26
1013.85:367:26
1113.85:367:26
1213.85:377:26
1313.85:377:26
1413.85:387:25
1513.85:387:25
1613.85:397:25
1713.75:397:24
1813.75:407:24
1913.75:417:24
2013.75:417:23
2113.75:427:23
2213.75:427:22
2313.65:437:22
2413.65:437:21
2513.65:447:21
2613.65:457:20
2713.65:457:20
2813.65:467:19
2913.55:467:18
3013.55:477:18
3113.55:487:17

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 6.09 kWh/m².

For context, solar energy here swings from a low near 2.83 kWh/m² to a high of 6.44 kWh/m² in May across the year — July's 6.09 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.1Intense
26.1Intense
36.1Intense
46.1Intense
56.1Intense
66.1Intense
76.1Intense
86.1Intense
96.1Intense
106.1Intense
116.1Intense
126.1Intense
136.1Intense
146.1Intense
156.1Intense
166.1Intense
176.1Intense
186.0Intense
196.0Intense
206.0Intense
216.0Intense
226.0Intense
236.0Bright
246.0Bright
256.0Bright
265.9Bright
275.9Bright
285.9Bright
295.9Bright
305.8Bright
315.8Bright
Planning a trip in July

Hazard calendar for St. Johns

In seasonPeak

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

St. Johns sits in the Atlantic hurricane belt; the season peaks August–October.

St. Johns's rainy season runs June–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 July a good time to visit St. Johns?

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

3.4
Sightseeing
11th-best month of the year
5.0
Beach & pool
8th-best month of the year

July is a weaker month for outdoor sightseeing in St. Johns.

What to pack for St. Johns in July

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

In July, St. Johns sees daytime highs around 88°F and nights near 76°F. Pack light clothes, rain gear and sun protection. About 20 days see rain.

light clothesrain gearsun protection

Sea temperature near St. Johns in July

The nearest coast averages about 82°F in July — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 23 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 St. Johns in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in St. Johns 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 St. Johns in July

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in St. Johns 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 St. Johns?

St. Johns sits at 30.1°N, 81.5°W, 33 ft above sea level, in United States. The nearest listed city is Fruit Cove, 6.2 mi away.

Topography around St. Johns

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

Within 2 miles, the terrain around St. Johns has only modest variations in elevation — a maximum elevation change of 118 ft around an average of 39 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 144 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 308 ft.

The land around St. Johns is covered by trees (65%) within 2 miles, trees (62%) within 10 miles, and trees (59%) and water (28%) within 50 miles.

2 miles
118 ft
10 miles
144 ft
50 miles
308 ft
treesgrasslandcroplandartificial surfaceswaterwetland
July weather nearby: Fruit Cove 6.2 mi · Fleming Island 11 mi · Palm Valley 12 mi · Lakeside 14 mi · Ponte Vedra Beach 15 mi · Jacksonville Beach 17 mi · Oakleaf Plantation 18 mi · Jacksonville 19 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 St. Johns (30.0815°, -81.5477°, elevation 33 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).