San Luis weather in July

In July, San Luis sees average daytime highs of 106°F and overnight lows near 83°F, with 0.2 in of rain across 1.5 wet days and about 13.9 hours of daylight. It is the 1st-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 106°F through the month. The sky is clear or mostly clear about 79% of the time in July, and the air most often feels humid.

Daylight stretches from about 14 h 06 min at the start of July to 13 h 36 min by month's end. Set against the rest of the year, July is San Luis's 7th-clearest and 1st-windiest month. For the whole year in context, see San Luis's year-round climate.

Daytime high
106°
1st warmest
Overnight low
83°
11th coldest
Rainfall
0.2 in
1.5 wet days
Daylight
13 h 54 min
5:46 AM – 7:43 PM
Cloud cover
22%
7th clearest
Wind
7 mph
1st windiest
Solar energy
7.79 kWh/m²
Travel score
0.0
out of 10

San Luis is city in Yuma County, Arizona, United States.

Density
356/km²
people per km²
Founded
1930

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 106°F through the month.

A typical July day in San Luis reaches about 106°F in the afternoon and slips back to 83°F overnight — a 24°F spread between the day's warmth and the night's chill. On most days the high lands between 101°F and 112°F. Set against its neighbours, July runs about 4°F warmer than June and on par with August.

70°80°90°100°110°151015202531
Avg high (°F)Avg low (°F)
110680
210680
310680
410681
510681
610681
710682
810682
910682
1010682
1110682
1210682
1310683
1410683
1510683
1610683
1710683
1810683
1910683
2010683
2110683
2210683
2310684
2410684
2510684
2610684
2710684
2810684
2910684
3010684
3110684

How July really feels in San Luis

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
31 feel dangerously hot (≥ 102°F)
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.

San Luis weather by month

How July compares with the rest of the year at a glance. July is the 1st-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan71° / 49°0.41.510.18.4
Feb74° / 52°0.52.310.88.6
Mar81° / 56°0.41.511.88.1
Apr87° / 61°0.10.612.86.1
May95° / 68°0.00.213.63.5
Jun103° / 75°0.00.214.10.7
Jul106° / 83°0.21.513.90.0
Aug106° / 84°0.42.913.20.0
Sep101° / 78°0.52.212.21.2
Oct91° / 67°0.20.911.24.9
Nov78° / 56°0.20.810.38.6
Dec69° / 48°0.41.79.98.2

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 79% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 9% of July, with mostly cloudy or overcast conditions the remaining 12%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1928
2928
3928
4928
5928
6919
7919
89010
99010
109010
119010
129010
138911
148911
158911
168911
178911
188713
198713
208713
218614
228614
238614
248614
258515
268515
278515
288515
298515
308515
318614

Chance of precipitation in July

Any precipitation

San Luis gets around 0.2 in of rain over 1.5 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 5% and peaks near 7% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
13
23
33
44
54
64
75
85
95
105
115
125
135
145
155
165
175
185
195
205
215
225
235
245
255
266
276
286
296
306
317

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the humid band about 27% of days. Sticky, muggy-or-worse air turns up on roughly 28% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1511720102
2481821112
3451822123
4431823133
5401824143
6381925154
7361926164
8341926164
9322027174
10312027184
11292028185
12282028195
13272128195
14252129205
15242129215
16232129225
17222030235
18212030245
19202030255
20192030266
21181930276
22171930287
23161929297
24151929308
25141828318
26141828329
27131827329
28131827339
291318263310
301418263310
311417263210

Wind in July

Winds average 7 mph in July, the windiest month of the year.

Across July, daily wind ranges from about 6 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
16calm
26calm
36calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 14 h 06 min at the start of July to 13 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 30 minutes over July. Sunrise moves from 5:39 AM to 5:56 AM, and sunset from 7:46 PM to 7:34 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.15:397:46
214.15:407:46
314.15:407:46
414.15:407:46
514.15:417:46
614.15:417:46
714.15:427:45
814.15:427:45
914.05:437:45
1014.05:437:45
1114.05:447:45
1214.05:447:44
1314.05:457:44
1414.05:457:44
1514.05:467:43
1613.95:467:43
1713.95:477:43
1813.95:487:42
1913.95:487:42
2013.95:497:41
2113.95:507:41
2213.85:507:40
2313.85:517:40
2413.85:517:39
2513.85:527:39
2613.85:537:38
2713.75:537:37
2813.75:547:37
2913.75:557:36
3013.75:557:35
3113.65:567:34

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 7.79 kWh/m².

For context, solar energy here swings from a low near 3.4 kWh/m² to a high of 8.49 kWh/m² in June across the year — July's 7.79 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
18.2Intense
28.2Intense
38.2Intense
48.1Intense
58.1Intense
68.1Intense
78.0Intense
88.0Intense
98.0Intense
108.0Intense
117.9Intense
127.9Intense
137.9Intense
147.8Intense
157.8Intense
167.8Intense
177.8Intense
187.8Intense
197.7Intense
207.7Intense
217.7Intense
227.7Intense
237.6Intense
247.6Intense
257.6Intense
267.5Intense
277.5Intense
287.5Intense
297.5Intense
307.5Intense
317.5Intense
Planning a trip in July

Is July a good time to visit San Luis?

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

0.0
Sightseeing
11th-best month of the year
2.2
Beach & pool
12th-best month of the year

July is a weaker month for outdoor sightseeing in San Luis.

What to pack for San Luis in July

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

In July, San Luis sees daytime highs around 106°F and nights near 83°F. Pack light clothes and sun protection.

light clothessun protection

UV index in San Luis in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in San Luis peaks around June 23 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 3 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateVery highExtremeVery highHighModerateJun 23UV 11Dec 18UV 3
UV index (midday)Level
Jan4Moderate
Feb5Moderate
Mar5Moderate
Apr8Very high
May8Very high
Jun11Extreme
Jul11Extreme
Aug10Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate
Location & terrain

Where is San Luis?

San Luis sits at 32.5°N, 114.8°W, 131 ft above sea level, in United States. The nearest listed city is San Luis Río Colorado, 2.5 mi away.

Topography around San Luis

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

Within 2 miles, the terrain around San Luis has only modest variations in elevation — a maximum elevation change of 89 ft around an average of 118 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 180 ft; within 50 miles, large variations in elevation — a maximum elevation change of 3,652 ft.

The land around San Luis is covered by artificial surfaces (46%), bare terrain (26%) and cropland (24%) within 2 miles, bare terrain (45%) and cropland (41%) within 10 miles, and bare terrain (73%) within 50 miles.

2 miles
89 ft
10 miles
180 ft
50 miles
3,652 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
July weather nearby: San Luis Río Colorado 2.5 mi · Somerton 8.7 mi · Yuma 19 mi · Ciudad Guadalupe Victoria 23 mi · Fortuna Foothills 25 mi · Puebla 34 mi · Mexicali 40 mi · Calexico 43 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 San Luis (32.487°, -114.7822°, elevation 131 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).