Harvey weather in July

In July, Harvey sees average daytime highs of 88°F and overnight lows near 78°F, with 5.6 in of rain across 17.9 wet days and about 13.7 hours of daylight. It is the 1st-warmest and 2nd-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 28% of the time in July, and the air most often feels miserable.

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 Harvey's 12th-clearest and 11th-windiest month. For the whole year in context, see Harvey's year-round climate.

Daytime high
88°
1st warmest
Overnight low
78°
12th coldest
Rainfall
5.6 in
17.9 wet days
Daylight
13 h 48 min
5:13 AM – 6:58 PM
Cloud cover
61%
12th clearest
Wind
6 mph
11th windiest
Solar energy
5.83 kWh/m²
Travel score
3.7
out of 10

Harvey is unincorporated suburban community and census-designated place in Jefferson Parish, Louisiana.

Density
1,110/km²
people per km²

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 Harvey reaches about 88°F in the afternoon and slips back to 78°F overnight — a 10°F spread between the day's warmth and the night's chill. On most days the high lands between 84°F and 91°F. Set against its neighbours, July runs about 1°F warmer than June and on par with August.

70°80°90°151015202531
Avg high (°F)Avg low (°F)
18777
28777
38777
48778
58778
68778
78778
88878
98878
108878
118878
128878
138878
148878
158878
168878
178878
188878
198878
208878
218878
228878
238878
248878
258878
268878
278878
288878
298878
308878
318878

How July really feels in Harvey

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.

Harvey weather by month

How July compares with the rest of the year at a glance. July is the 1st-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan61° / 48°4.49.710.35.1
Feb64° / 51°4.28.810.95.8
Mar69° / 57°4.59.411.86.6
Apr75° / 63°3.98.412.77.2
May82° / 70°3.69.213.56.5
Jun86° / 76°5.215.213.94.4
Jul88° / 78°5.617.913.73.7
Aug87° / 78°6.317.413.13.8
Sep84° / 74°4.912.812.25.2
Oct77° / 65°3.5811.37.4
Nov69° / 56°3.37.310.57.0
Dec63° / 51°3.89.210.15.7

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% of the time in July, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 21% of July, with mostly cloudy or overcast conditions the remaining 52%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14951
24951
34951
44951
55050
64951
74951
84951
94852
104951
114951
124951
134951
144852
154951
164951
174852
184753
194852
204951
214951
224951
234951
244951
254951
264951
274852
284852
294852
304852
314852

Chance of precipitation in July

Any precipitation

Harvey gets around 5.6 in of rain over 17.9 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 58% and peaks near 59% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
153
254
354
455
555
656
757
857
958
1058
1159
1259
1359
1459
1559
1659
1759
1859
1959
2059
2159
2259
2358
2458
2558
2658
2758
2858
2958
3057
3157

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the miserable band about 53% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1145837
2135838
3135739
4035740
5025741
6025642
7025543
8025444
9025246
10025147
11015148
12014949
13024850
14024751
15024553
16024454
17024256
18024157
19034057
20033859
21033760
22033760
23033661
24033661
25033562
26033562
27033562
28033562
29033562
30033562
31033463

Wind in July

Winds average 6 mph in July.

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 5:07 AM to 5:22 AM, and sunset from 7:01 PM to 6:51 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.95:077:01
213.95:077:01
313.95:077:01
413.95:087:01
513.95:087:01
613.95:097:01
713.95:097:00
813.85:097:00
913.85:107:00
1013.85:107:00
1113.85:117:00
1213.85:117:00
1313.85:126:59
1413.85:126:59
1513.85:136:59
1613.85:136:58
1713.75:146:58
1813.75:156:58
1913.75:156:57
2013.75:166:57
2113.75:166:56
2213.75:176:56
2313.65:176:56
2413.65:186:55
2513.65:196:54
2613.65:196:54
2713.65:206:53
2813.55:206:53
2913.55:216:52
3013.55:216:51
3113.55:226:51

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 5.83 kWh/m².

For context, solar energy here swings from a low near 2.73 kWh/m² to a high of 6.23 kWh/m² in May across the year — July's 5.83 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
35.9Bright
45.9Bright
55.9Bright
65.9Bright
75.9Bright
85.9Bright
95.9Bright
105.9Bright
115.9Bright
125.9Bright
135.8Bright
145.8Bright
155.8Bright
165.8Bright
175.8Bright
185.8Bright
195.8Bright
205.8Bright
215.8Bright
225.7Bright
235.7Bright
245.7Bright
255.7Bright
265.7Bright
275.7Bright
285.7Bright
295.7Bright
305.7Bright
315.7Bright
Planning a trip in July

Hazard calendar for Harvey

In seasonPeak

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

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

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

Is July a good time to visit Harvey?

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

3.7
Sightseeing
12th-best month of the year
5.5
Beach & pool
7th-best month of the year

July is a weaker month for outdoor sightseeing in Harvey.

What to pack for Harvey in July

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

In July, Harvey sees daytime highs around 88°F and nights near 78°F. Pack light clothes and rain gear. Worth having: sun protection. About 18 days see rain.

light clothesrain gearsun protection

Sea temperature near Harvey in July

The nearest coast averages about 86°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 16 mi away) is warmest in August at about 86°F and coldest in January near 58°F.

It's comfortable for a long swim from Apr 5 to Nov 13 — about 7.3 months when the water holds above 68°F.

50°60°70°80°90°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan58Bracing
Feb58Bracing
Mar64Cool
Apr71Refreshing
May78Warm
Jun84Tropical
Jul86Tropical
Aug86Tropical
Sep83Tropical
Oct76Warm
Nov67Cool
Dec61Cool

UV index in Harvey 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 Harvey peaks around July 11 at about 10 (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 highHighModerateJul 11UV 10Dec 19UV 4
UV index (midday)Level
Jan4Moderate
Feb6High
Mar7High
Apr10Very high
May10Very high
Jun10Extreme
Jul10Extreme
Aug9Very high
Sep8Very high
Oct6High
Nov5Moderate
Dec4Moderate

Air quality in Harvey 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 Harvey is worst in July — around 22 µg/m³ PM2.5 (moderate), about 2.9× the cleanest month (November, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1621 µg/m³Nov 238 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb9Good
Mar10Good
Apr10Good
May13Moderate
Jun18Moderate
Jul22Moderate
Aug17Moderate
Sep11Good
Oct8Good
Nov8Good
Dec8Good
Location & terrain

Where is Harvey?

Harvey sits at 29.9°N, 90.1°W, 3 ft above sea level, in United States. The nearest listed city is Marrero, 1.2 mi away.

Topography around Harvey

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

Within 2 miles, the terrain around Harvey has only modest variations in elevation — a maximum elevation change of 72 ft around an average of 7 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 243 ft.

The land around Harvey is covered by artificial surfaces (56%) within 2 miles, artificial surfaces (29%) and trees (27%) within 10 miles, and water (41%), trees (28%) and wetland (20%) within 50 miles.

2 miles
72 ft
10 miles
144 ft
50 miles
243 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
July weather nearby: Marrero 1.2 mi · Gretna 1.9 mi · Terrytown 2.5 mi · New Orleans 3.7 mi · Estelle 4.3 mi · Metairie 7.5 mi · Chalmette 7.5 mi · Metairie Terrace 7.5 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 Harvey (29.9035°, -90.0773°, elevation 3 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).