União weather in July

In July, União sees average daytime highs of 34°C and overnight lows near 23°C, with 12 mm of rain across 1.7 wet days and about 11.8 hours of daylight. It is the 6th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 34°C through the month. The sky is clear or mostly clear about 52% of the time in July, and the air most often feels muggy.

Daylight stretches from about 11 h 42 min at the start of July to 11 h 48 min by month's end. Set against the rest of the year, July is União's 4th-clearest and 4th-windiest month. For the whole year in context, see União's year-round climate.

Daytime high
34°
6th warmest
Overnight low
23°
4th coldest
Rainfall
12 mm
1.7 wet days
Daylight
11 h 48 min
6:04 AM – 5:50 PM
Cloud cover
42%
4th clearest
Wind
8 km/h
4th windiest
Solar energy
5.41 kWh/m²
Travel score
4.0
out of 10

União is settlement in Uniao, Piaui, Brazil.

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 34°C through the month.

A typical July day in União reaches about 34°C in the afternoon and slips back to 23°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 32°C and 35°C. Set against its neighbours, July runs about 1°C warmer than June and about 2°C cooler than August.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13323
23323
33323
43323
53323
63323
73323
83323
93323
103323
113323
123323
133323
143323
153323
163323
173423
183423
193423
203423
213423
223423
233423
243423
253423
263423
273423
283423
293423
303423
313423

How July really feels in União

Once humidity and wind are folded in, July averages 31 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
31
heat index over the day's high
Days feeling ≤ C
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.

União weather by month

How July compares with the rest of the year at a glance. July is the 6th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan33° / 24°22821.812.22.6
Feb32° / 23°29622.212.22.7
Mar31° / 23°36327122.6
Apr31° / 23°32524.611.92.8
May32° / 23°14315.111.83.6
Jun33° / 23°234.611.74.2
Jul34° / 23°121.711.84.0
Aug35° / 24°20.511.93.2
Sep36° / 24°30.6122.3
Oct37° / 25°101.512.11.8
Nov36° / 25°354.512.22.0
Dec35° / 25°849.712.32.4

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 52% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 27% of July, with mostly cloudy or overcast conditions the remaining 21%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17525
27525
37525
47624
57624
67624
77723
87723
97723
107822
117822
127822
137822
147921
157921
167921
177921
187921
198020
208020
218020
228119
238119
248119
258119
268317
278317
288317
298317
308416
318416

Chance of precipitation in July

Any precipitation

União gets around 12 mm of rain over 1.7 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 6% and peaks near 10% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%151015202531
Rain chance (%)
110
210
310
49
59
69
79
88
98
108
117
127
137
146
156
165
175
185
194
204
214
223
233
243
253
262
272
282
292
302
312

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the muggy band about 52% of days. Sticky, muggy-or-worse air turns up on roughly 77% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1085141
2195040
3195139
41105138
51115137
61125136
71125235
81135333
91145332
101155331
111165330
121175329
131185328
141195327
151205425
161215424
171225423
181235521
191255420
202265319
212275318
222285416
233295315
243305314
254315114
264325113
275325112
285335111
295345110
306355010
31635509

Wind in July

Winds average 8 km/h in July.

Across July, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 11 h 42 min at the start of July to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over July. Sunrise moves from 6:03 AM to 6:04 AM, and sunset from 5:47 PM to 5:51 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.76:035:47
211.76:035:47
311.76:035:47
411.76:035:48
511.76:035:48
611.76:035:48
711.76:045:48
811.76:045:48
911.76:045:49
1011.76:045:49
1111.76:045:49
1211.86:045:49
1311.86:045:49
1411.86:045:49
1511.86:045:50
1611.86:045:50
1711.86:045:50
1811.86:045:50
1911.86:045:50
2011.86:045:50
2111.86:045:51
2211.86:045:51
2311.86:045:51
2411.86:045:51
2511.86:045:51
2611.86:045:51
2711.86:045:51
2811.86:045:51
2911.86:045:51
3011.86:045:51
3111.86:045:51

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 5.41 kWh/m².

For context, solar energy here swings from a low near 4.76 kWh/m² to a high of 6.71 kWh/m² in October across the year — July's 5.41 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.2Bright
45.2Bright
55.2Bright
65.2Bright
75.2Bright
85.2Bright
95.3Bright
105.3Bright
115.3Bright
125.3Bright
135.3Bright
145.3Bright
155.4Bright
165.4Bright
175.4Bright
185.4Bright
195.5Bright
205.5Bright
215.5Bright
225.5Bright
235.6Bright
245.6Bright
255.6Bright
265.7Bright
275.7Bright
285.7Bright
295.7Bright
305.8Bright
315.8Bright
Planning a trip in July

Hazard calendar for União

In seasonPeak

None of União's seasonal hazards are active in July. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

União's monsoon runs January–April, when most of the year's rain falls.

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

Is July a good time to visit União?

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

4.0
Sightseeing
2nd-best month of the year
7.5
Beach & pool
1st-best month of the year

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

What to pack for União in July

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

In July, União sees daytime highs around 34°C and nights near 23°C. Pack light clothes. Worth having: sun protection.

light clothessun protection

UV index in União 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 União peaks around March 14 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 24 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 14UV 15Jul 24UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar15Extreme
Apr13Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug10Very high
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec11Extreme

Air quality in União 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 União is worst in November — around 22 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (June, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateNov 922 µg/m³Jun 1211 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb16Moderate
Mar14Moderate
Apr13Moderate
May12Good
Jun10Good
Jul14Moderate
Aug20Moderate
Sep17Moderate
Oct22Moderate
Nov22Moderate
Dec18Moderate
Location & terrain

Where is União?

União sits at 4.6°S, 42.9°W, 60 m above sea level, in Brazil. The nearest listed city is José de Freitas, 37 km away.

Topography around União

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of União.

Within 3 km, the terrain around União has only modest variations in elevation — a maximum elevation change of 96 m around an average of 54 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 139 m; within 80 km, significant variations in elevation — a maximum elevation change of 318 m.

The land around União is covered by grassland (40%) and trees (24%) within 3 km, trees (58%) and grassland (23%) within 16 km, and trees (66%) within 80 km.

3 km
96 m
16 km
139 m
80 km
318 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
July weather nearby: José de Freitas 37 km · Coelho Neto 40 km · Miguel Alves 47 km · Teresina 56 km · Timon 57 km · Caxias 62 km · Altos 67 km · Aldeias Altas 67 km

Brazil travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / N
127 / 220 V · 60 Hz
Prices
≈ 46% of US
price level, 2025
GDP per capita
$10,713
2025
Happiness
6.6 / 10
World Happiness, 2025
Safe drinking water
89%
of population, 2024
Homicide rate
19.3
per 100k, 2023
Road deaths
16
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 482
Religion
Roman Catholic 57%Evangelical 27%none 9%other 4%

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 União (-4.5858°, -42.8642°, elevation 60 m), 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).