Denison weather in August

In August, Denison sees average daytime highs of 92°F and overnight lows near 75°F, with 2.0 in of rain across 5.8 wet days and about 13.3 hours of daylight. It is the 2nd-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 92°F through the month. The sky is clear or mostly clear about 57% 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 Denison's 1st-clearest and 12th-windiest month. For the whole year in context, see Denison's year-round climate.

Daytime high
92°
2nd warmest
Overnight low
75°
11th coldest
Rainfall
2.0 in
5.8 wet days
Daylight
13 h 18 min
5:52 AM – 7:08 PM
Cloud cover
41%
1st clearest
Wind
6 mph
12th windiest
Solar energy
6.22 kWh/m²
Travel score
3.6
out of 10

Denison is city in Grayson County, Texas, United States.

Density
381/km²
people per km²
Founded
1872

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 92°F through the month.

A typical August day in Denison reaches about 92°F in the afternoon and slips back to 75°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 85°F and 99°F. Set against its neighbours, August runs on par with July and about 7°F warmer than September.

60°70°80°90°100°151015202531
Avg high (°F)Avg low (°F)
19476
29476
39476
49476
59476
69376
79376
89376
99375
109375
119375
129375
139375
149375
159375
169375
179375
189275
199274
209274
219274
229274
239274
249274
259274
269274
279174
289173
299173
309173
319173

How August really feels in Denison

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.

Denison weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan53° / 36°2.56.70.7103.4
Feb58° / 40°2.67.20.710.74.5
Mar65° / 47°4.09.40.411.76.1
Apr73° / 55°4.69.1012.87.0
May80° / 64°6.011.9013.76.2
Jun88° / 72°3.78.8014.24.6
Jul93° / 75°2.06.30143.6
Aug92° / 75°2.05.8013.33.6
Sep85° / 68°3.36.8012.25.8
Oct75° / 56°4.27.9011.27.4
Nov64° / 46°3.47.10.110.26.2
Dec55° / 38°3.36.90.49.83.8

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 57% of the time in August, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 16% of August, with mostly cloudy or overcast conditions the remaining 27%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17426
27426
37426
47426
57426
67426
77426
87426
97426
107327
117327
127327
137327
147228
157228
167228
177228
187228
197327
207327
217327
227327
237327
247327
257327
267327
277327
287327
297228
307327
317228

Chance of precipitation in August

Any precipitation

Denison gets around 2.0 in of rain over 5.8 wet days in August, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 20% and peaks near 22% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
118
219
319
419
519
619
719
819
919
1020
1120
1220
1320
1420
1520
1620
1720
1820
1919
2019
2119
2219
2319
2419
2519
2619
2720
2820
2921
3021
3122

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 42% 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 (%)
1021242431
2021242431
3021143431
4021143431
5021044421
6021044421
7031044421
8031045421
9031044411
10031044411
11041044411
12041143401
13041243401
14051342391
15051342391
16051442381
17051541371
18051641371
19051741361
20051741351
21051841351
22051941341
23052041340
24052041330
25052141320
26152141320
27152141310
28162241300
29262241300
30262240290
31372240290

Wind in August

Winds average 6 mph in August, the calmest month.

Across August, 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 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 5:41 AM to 6:03 AM, and sunset from 7:23 PM to 6:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.75:417:23
213.75:427:22
313.65:437:21
413.65:447:20
513.65:447:20
613.65:457:19
713.55:467:18
813.55:467:17
913.55:477:16
1013.45:487:15
1113.45:497:14
1213.45:497:13
1313.45:507:12
1413.35:517:10
1513.35:527:09
1613.35:527:08
1713.25:537:07
1813.25:547:06
1913.25:547:05
2013.15:557:03
2113.15:567:02
2213.15:577:01
2313.05:577:00
2413.05:586:59
2513.05:596:57
2612.96:006:56
2712.96:006:55
2812.96:016:53
2912.86:026:52
3012.86:026:51
3112.86:036:49

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 6.22 kWh/m².

For context, solar energy here swings from a low near 2.48 kWh/m² to a high of 6.76 kWh/m² in July across the year — August's 6.22 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.6Intense
26.5Intense
36.5Intense
46.5Intense
56.5Intense
66.5Intense
76.4Intense
86.4Intense
96.4Intense
106.3Intense
116.3Intense
126.3Intense
136.3Intense
146.2Intense
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 Denison?

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

3.6
Sightseeing
10th-best month of the year
6.9
Beach & pool
2nd-best month of the year

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

What to pack for Denison in August

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

In August, Denison sees daytime highs around 92°F and nights near 75°F. Pack light clothes and sun protection. About 6 days see rain.

light clothessun protection

UV index in Denison 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 Denison peaks around June 20 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJun 20UV 10Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar6High
Apr9Very high
May9Very high
Jun10Extreme
Jul10Very high
Aug10Very high
Sep8Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Denison 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 Denison is worst in July — around 18 µg/m³ PM2.5 (moderate), about 3.1× the cleanest month (November, 6 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1618 µg/m³Nov 216 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb8Good
Mar10Good
Apr10Good
May13Moderate
Jun15Moderate
Jul18Moderate
Aug14Moderate
Sep10Good
Oct6Good
Nov6Good
Dec6Good
Location & terrain

Where is Denison?

Denison sits at 33.8°N, 96.5°W, 728 ft above sea level, in United States. The nearest listed city is Sherman, 9.3 mi away.

Topography around Denison

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

Within 2 miles, the terrain around Denison has only modest variations in elevation — a maximum elevation change of 256 ft around an average of 709 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 449 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 768 ft.

The land around Denison is covered by trees (63%) and grassland (21%) within 2 miles, grassland (45%) and trees (38%) within 10 miles, and grassland (53%) and trees (32%) within 50 miles.

2 miles
256 ft
10 miles
449 ft
50 miles
768 ft
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Sherman 9.3 mi · Durant 19 mi · Celina 33 mi · Gainesville 35 mi · McKinney 39 mi · Prosper 39 mi · Frisco 45 mi · Ardmore 45 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 Denison (33.7557°, -96.5367°, elevation 728 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).