Allen weather in August

In August, Allen sees average daytime highs of 94°F and overnight lows near 76°F, with 2.1 in of rain across 5.3 wet days and about 13.2 hours of daylight. It is the 2nd-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 94°F through the month. The sky is clear or mostly clear about 58% of the time in August, and the air most often feels muggy.

Daylight stretches from about 13 h 42 min at the start of August to 12 h 48 min by month's end. Set against the rest of the year, August is Allen's 2nd-clearest and 12th-windiest month. For the whole year in context, see Allen's year-round climate.

Daytime high
94°
2nd warmest
Overnight low
76°
11th coldest
Rainfall
2.1 in
5.3 wet days
Daylight
13 h 12 min
5:54 AM – 7:08 PM
Cloud cover
40%
2nd clearest
Wind
7 mph
12th windiest
Solar energy
6.23 kWh/m²
Travel score
3.3
out of 10

Allen is city in Collin County, Texas, United States.

Density
1,431/km²
people per km²
Founded
1953

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 94°F through the month.

A typical August day in Allen reaches about 94°F in the afternoon and slips back to 76°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 86°F and 100°F. Set against its neighbours, August runs on par with July and about 6°F warmer than September.

70°80°90°100°151015202531
Avg high (°F)Avg low (°F)
19576
29576
39576
49576
59576
69576
79476
89476
99476
109476
119476
129476
139476
149476
159476
169476
179476
189476
199375
209375
219375
229375
239375
249375
259375
269375
279274
289274
299274
309274
319274

How August really feels in Allen

Once humidity and wind are folded in, August 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 August is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Allen weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan56° / 38°2.86.90.410.14.1
Feb60° / 41°2.97.50.510.85.0
Mar67° / 48°3.99.20.211.76.4
Apr75° / 56°4.38.4012.87.2
May82° / 65°5.411.1013.76.0
Jun89° / 73°3.48.4014.14.3
Jul94° / 76°1.860143.2
Aug94° / 76°2.15.3013.23.3
Sep87° / 69°2.86.3012.25.3
Oct77° / 58°3.97.8011.27.4
Nov66° / 47°3.67.10.110.36.6
Dec57° / 40°3.67.10.29.94.5

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 58% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 15% of August, with mostly cloudy or overcast conditions the remaining 27%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17228
27228
37327
47327
57426
67426
77525
87426
97426
107426
117327
127228
137228
147228
157228
167228
177228
187228
197228
207228
217327
227327
237327
247327
257327
267327
277327
287327
297327
307327
317228

Chance of precipitation in August

Any precipitation

Allen gets around 2.1 in of rain over 5.3 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 18% and peaks near 21% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
117
217
316
416
516
616
716
816
917
1017
1117
1217
1317
1418
1518
1618
1718
1818
1918
2018
2118
2218
2318
2418
2519
2619
2719
2820
2920
3021
3121

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the muggy band about 44% of days. Sticky, muggy-or-worse air turns up on roughly 80% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1021447361
2021348362
3021348362
4021348362
5021348362
6021247362
7021247362
8021246372
9031245372
10031245372
11031244382
12041243382
13041243392
14051342382
15051342382
16051341382
17051441382
18061442371
19061542361
20061542361
21061642351
22061643341
23061743331
24061843331
25061843320
26061944310
27161943310
28162043300
29162043300
30262142290
31272141290

Wind in August

Winds average 7 mph in August, the calmest month.

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

0246810151015202531
Wind speed (mph)Feels
17calm
27calm
37calm
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 August

DaylightNight

Daylight runs from about 13 h 42 min at the start of August to 12 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 54 minutes over August. Sunrise moves from 5:43 AM to 6:04 AM, and sunset from 7:22 PM to 6:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.75:437:22
213.65:447:22
313.65:457:21
413.65:457:20
513.55:467:19
613.55:477:18
713.55:477:17
813.55:487:16
913.45:497:15
1013.45:507:14
1113.45:507:13
1213.45:517:12
1313.35:527:11
1413.35:527:10
1513.35:537:09
1613.25:547:08
1713.25:547:07
1813.25:557:06
1913.15:567:04
2013.15:577:03
2113.15:577:02
2213.05:587:01
2313.05:597:00
2413.05:596:58
2513.06:006:57
2612.96:016:56
2712.96:016:55
2812.96:026:53
2912.86:036:52
3012.86:036:51
3112.86:046:49

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 6.23 kWh/m².

For context, solar energy here swings from a low near 2.56 kWh/m² to a high of 6.79 kWh/m² in July across the year — August's 6.23 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.6Intense
26.6Intense
36.6Intense
46.5Intense
56.5Intense
66.5Intense
76.5Intense
86.4Intense
96.4Intense
106.4Intense
116.3Intense
126.3Intense
136.3Intense
146.3Intense
156.2Intense
166.2Intense
176.2Intense
186.1Intense
196.1Intense
206.1Intense
216.0Intense
226.0Intense
236.0Bright
246.0Bright
255.9Bright
265.9Bright
275.8Bright
285.8Bright
295.8Bright
305.7Bright
315.7Bright
Planning a trip in August

Is August a good time to visit Allen?

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

3.3
Sightseeing
11th-best month of the year
6.7
Beach & pool
3rd-best month of the year

August is a weaker month for outdoor sightseeing in Allen. The water and warmth also suit a beach or pool day.

What to pack for Allen in August

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

In August, Allen sees daytime highs around 94°F and nights near 76°F. Pack light clothes and sun protection. About 5 days see rain.

light clothessun protection

UV index in Allen in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August 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 Allen peaks around July 17 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 3 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJul 17UV 10Dec 21UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar6High
Apr9Very high
May9Very high
Jun10Very high
Jul10Extreme
Aug10Very high
Sep8Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Allen in August

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Allen is worst in July — around 19 µg/m³ PM2.5 (moderate), about 2.6× the cleanest month (October, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1519 µg/m³Oct 248 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb8Good
Mar10Good
Apr11Good
May14Moderate
Jun16Moderate
Jul19Moderate
Aug15Moderate
Sep11Good
Oct8Good
Nov8Good
Dec8Good
Location & terrain

Where is Allen?

Allen sits at 33.1°N, 96.7°W, 659 ft above sea level, in United States. The nearest listed city is Plano, 6.2 mi away.

Topography around Allen

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

Within 2 miles, the terrain around Allen has only modest variations in elevation — a maximum elevation change of 144 ft around an average of 653 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 328 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 735 ft.

The land around Allen is covered by artificial surfaces (67%) within 2 miles, artificial surfaces (44%), grassland (26%) and trees (20%) within 10 miles, and grassland (48%) and trees (25%) within 50 miles.

2 miles
144 ft
10 miles
328 ft
50 miles
735 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Plano 6.2 mi · Murphy 6.8 mi · McKinney 7.5 mi · Frisco 9.3 mi · Wylie 9.9 mi · Sachse 9.9 mi · Richardson 11 mi · Prosper 12 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 Allen (33.1032°, -96.6706°, elevation 659 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. 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).