Grand Island weather in August

In August, Grand Island sees average daytime highs of 84°F and overnight lows near 64°F, with 3.0 in of rain across 8.9 wet days and about 13.6 hours of daylight. It is the 2nd-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 84°F through the month. The sky is clear or mostly clear about 50% of the time in August, and the air most often feels humid.

Daylight stretches from about 14 h 12 min at the start of August to 13 hours by month's end. Set against the rest of the year, August is Grand Island's 3rd-clearest and 11th-windiest month. For the whole year in context, see Grand Island's year-round climate.

Daytime high
84°
2nd warmest
Overnight low
64°
11th coldest
Rainfall
3.0 in
8.9 wet days
Daylight
13 h 36 min
5:48 AM – 7:27 PM
Cloud cover
44%
3rd clearest
Wind
8 mph
11th windiest
Solar energy
5.92 kWh/m²
Travel score
5.9
out of 10

Grand Island is city in and county seat of Hall County, Nebraska, United States.

Founded
1857

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 84°F through the month.

A typical August day in Grand Island reaches about 84°F in the afternoon and slips back to 64°F overnight — a 21°F spread between the day's warmth and the night's chill. On most days the high lands between 75°F and 93°F. Set against its neighbours, August runs about 2°F cooler than July and about 7°F warmer than September.

50°60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18565
28565
38565
48565
58565
68565
78565
88565
98464
108464
118464
128464
138464
148464
158464
168464
178463
188463
198463
208463
218463
228463
238463
248463
258463
268462
278462
288362
298362
308362
318361

How August really feels in Grand Island

Once humidity and wind are folded in, August averages 0 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
0
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

August sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Grand Island weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan35° / 16°0.843.69.40.0
Feb40° / 19°0.94.33.410.40.1
Mar51° / 29°2.06.92.511.72.7
Apr61° / 39°3.49.61.413.15.2
May71° / 51°5.112.30.114.36.3
Jun82° / 62°4.110.3014.96.1
Jul86° / 66°3.09014.65.2
Aug84° / 64°3.08.9013.65.9
Sep77° / 55°2.47.1012.37.5
Oct64° / 41°2.56.70.710.96.3
Nov49° / 29°1.34.91.99.72.5
Dec38° / 19°1.04.23.49.10.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 50% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 18% of August, with mostly cloudy or overcast conditions the remaining 32%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16436
26436
36436
46535
56535
66436
76535
86535
96535
106634
116634
126733
136832
146832
156931
166931
176931
187030
197030
207030
217030
227030
237030
247129
257129
267129
277129
287228
297228
307228
317228

Chance of precipitation in August

Any precipitation

Grand Island gets around 3.0 in of rain over 8.9 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 28% and peaks near 32% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
132
232
332
432
532
632
732
832
931
1031
1131
1230
1330
1429
1529
1629
1728
1828
1927
2027
2127
2226
2326
2426
2525
2625
2724
2824
2924
3024
3124

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the humid band about 34% of days. Sticky, muggy-or-worse air turns up on roughly 37% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1616333411
2616333411
3616343410
4616343410
5616343410
6716343410
771634349
871734339
981734339
1081734338
1181834328
1291834327
1391834327
14101834326
15101934316
16111934315
17111934314
18111934314
19112034313
20112034323
21122034323
22122034323
23122134312
24132134312
25132133302
26142133292
27152233282
28162233272
29182332261
30202332241
31222331231

Wind in August

Winds average 8 mph in August.

Across August, daily wind ranges from about 8 mph on the calmest days to 9 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
18light breeze
28light breeze
38light breeze
48light breeze
58light breeze
68light breeze
78light breeze
88light breeze
98light breeze
108light breeze
118light breeze
128light breeze
138light breeze
148light breeze
158light breeze
168light breeze
178light breeze
188light breeze
198light breeze
208light breeze
218light breeze
229light breeze
239light breeze
249light breeze
259light breeze
269light breeze
279light breeze
289light breeze
299light breeze
309light breeze
319light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 12 min at the start of August to 13 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 72 minutes over August. Sunrise moves from 5:33 AM to 6:03 AM, and sunset from 7:46 PM to 7:03 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.25:337:46
214.25:347:45
314.15:357:44
414.15:367:42
514.15:377:41
614.05:387:40
714.05:397:39
814.05:407:38
913.95:417:36
1013.95:427:35
1113.85:437:34
1213.85:447:32
1313.85:457:31
1413.75:467:30
1513.75:477:28
1613.65:487:27
1713.65:497:25
1813.65:507:24
1913.55:517:22
2013.55:527:21
2113.45:537:19
2213.45:547:18
2313.45:557:16
2413.35:567:15
2513.35:577:13
2613.25:587:12
2713.25:597:10
2813.16:007:08
2913.16:017:07
3013.06:027:05
3113.06:037:03

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.92 kWh/m².

For context, solar energy here swings from a low near 2.07 kWh/m² to a high of 6.79 kWh/m² in June across the year — August's 5.92 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.3Intense
26.3Intense
36.3Intense
46.2Intense
56.2Intense
66.2Intense
76.1Intense
86.1Intense
96.1Intense
106.1Intense
116.0Intense
126.0Intense
136.0Intense
146.0Bright
156.0Bright
166.0Bright
175.9Bright
185.9Bright
195.9Bright
205.9Bright
215.8Bright
225.8Bright
235.8Bright
245.8Bright
255.7Bright
265.7Bright
275.7Bright
285.7Bright
295.6Bright
305.6Bright
315.5Bright
Planning a trip in August

Hazard calendar for Grand Island

In seasonPeak

In August, Grand Island sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Grand Island's rainy season runs April–October, when most of the year's rain falls.

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

Is August a good time to visit Grand Island?

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

5.9
Sightseeing
5th-best month of the year
7.5
Beach & pool
1st-best month of the year

August is a reasonable time to visit Grand Island for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Grand Island in August

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

In August, Grand Island sees daytime highs around 84°F and nights near 64°F. Pack light clothes. Worth having: rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

UV index in Grand Island in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Grand Island peaks around July 13 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJul 13UV 9Dec 22UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May7High
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct5Moderate
Nov3Moderate
Dec2Low
Location & terrain

Where is Grand Island?

Grand Island sits at 40.9°N, 98.3°W, 1,860 ft above sea level, in United States. The nearest listed city is Hastings, 24 mi away.

Topography around Grand Island

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

Within 2 miles, the terrain around Grand Island has only modest variations in elevation — a maximum elevation change of 75 ft around an average of 1,857 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 190 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 948 ft.

The land around Grand Island is covered by artificial surfaces (43%), grassland (23%) and trees (20%) within 2 miles, cropland (65%) and grassland (23%) within 10 miles, and cropland (70%) and grassland (26%) within 50 miles.

2 miles
75 ft
10 miles
190 ft
50 miles
948 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Hastings 24 mi · Kearney 42 mi · Columbus 62 mi · Lincoln 88 mi · Norfolk 90 mi · Fremont 102 mi · Papillion 121 mi · La Vista 122 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 Grand Island (40.925°, -98.342°, elevation 1,860 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).