Grand Island weather in July

In July, Grand Island sees average daytime highs of 78°F and overnight lows near 66°F, with 4.0 in of rain across 12.6 wet days and about 14.8 hours of daylight. It is the 1st-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 78°F through the month. The sky is clear or mostly clear about 37% of the time in July, and the air most often feels humid.

Daylight stretches from about 15 h 06 min at the start of July to 14 h 24 min by month's end. Set against the rest of the year, July is Grand Island's 2nd-clearest and 11th-windiest month. For the whole year in context, see Grand Island's year-round climate.

Daytime high
78°
1st warmest
Overnight low
66°
12th coldest
Rainfall
4.0 in
12.6 wet days
Daylight
14 h 54 min
4:55 AM – 7:48 PM
Cloud cover
53%
2nd clearest
Wind
8 mph
11th windiest
Solar energy
6.16 kWh/m²
Travel score
6.5
out of 10

Grand Island is town in New York.

Founded
1852

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 78°F through the month.

A typical July day in Grand Island reaches about 78°F in the afternoon and slips back to 66°F overnight — a 12°F spread between the day's warmth and the night's chill. On most days the high lands between 71°F and 84°F. Set against its neighbours, July runs about 4°F warmer than June and on par with August.

50°60°70°80°151015202531
Avg high (°F)Avg low (°F)
17665
27765
37765
47765
57765
67765
77765
87766
97766
107866
117866
127866
137866
147866
157866
167866
177866
187867
197867
207867
217867
227867
237867
247867
257867
267867
277866
287866
297866
307866
317866

How July really feels in Grand Island

Once humidity and wind are folded in, July 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

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

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan31° / 21°2.912.5109.20.0
Feb32° / 21°2.310.27.910.20.0
Mar40° / 28°2.911.45.611.60.2
Apr51° / 39°3.712.21.913.12.5
May64° / 50°3.412.4014.45.2
Jun73° / 61°3.912.3015.16.5
Jul78° / 66°4.012.6014.86.5
Aug76° / 65°3.411013.86.8
Sep70° / 58°3.410.4012.36.5
Oct58° / 47°3.712.60.110.84.0
Nov46° / 37°3.111.83.19.51.3
Dec37° / 28°3.112.87.48.90.0

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 37% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 20% of July, with mostly cloudy or overcast conditions the remaining 42%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15743
25842
35842
45842
55842
65941
75941
85941
95941
105842
115842
125842
135743
145842
155743
165743
175743
185644
195644
205644
215743
225644
235644
245644
255743
265743
275842
285842
295941
305941
316040

Chance of precipitation in July

Any precipitation

Grand Island gets around 4.0 in of rain over 12.6 wet days in July, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 41% and peaks near 45% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
140
239
339
438
538
637
737
837
937
1038
1138
1239
1339
1440
1541
1641
1742
1842
1943
2043
2144
2244
2344
2445
2544
2644
2744
2843
2943
3042
3142

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 31% of days. Sticky, muggy-or-worse air turns up on roughly 36% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1192327256
2182327256
3182327257
4182327257
5172327257
6172328257
7162328258
8162328258
9152229268
10152229269
11142229269
12142130269
13132130279
14132031279
15122031289
16121932289
17111932299
18111932299
19111832299
20111832309
21101833309
22101833309
23101833309
24101834309
2591834299
2691834299
2791834299
2891835299
2991934289
3091934289
31101934289

Wind in July

Winds average 8 mph in July.

Across July, daily wind ranges from about 7 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
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
217light breeze
227light breeze
237light breeze
247light breeze
257light breeze
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 15 h 06 min at the start of July to 14 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 42 minutes over July. Sunrise moves from 4:45 AM to 5:09 AM, and sunset from 7:53 PM to 7:35 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.14:457:53
215.14:457:53
315.14:467:53
415.14:467:53
515.14:477:53
615.14:487:53
715.14:487:52
815.14:497:52
915.04:507:52
1015.04:507:51
1115.04:517:51
1215.04:527:50
1315.04:537:50
1414.94:537:49
1514.94:547:49
1614.94:557:48
1714.94:567:47
1814.84:577:47
1914.84:587:46
2014.84:587:45
2114.84:597:44
2214.75:007:44
2314.75:017:43
2414.75:027:42
2514.65:037:41
2614.65:047:40
2714.65:057:39
2814.55:067:38
2914.55:077:37
3014.55:087:36
3114.45:097:35

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 6.16 kWh/m².

For context, solar energy here swings from a low near 1.28 kWh/m² to a high of 6.33 kWh/m² in June across the year — July's 6.16 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.4Intense
26.4Intense
36.4Intense
46.4Intense
56.4Intense
66.4Intense
76.4Intense
86.3Intense
96.3Intense
106.3Intense
116.3Intense
126.3Intense
136.2Intense
146.2Intense
156.2Intense
166.2Intense
176.1Intense
186.1Intense
196.1Intense
206.0Intense
216.0Intense
226.0Bright
236.0Bright
246.0Bright
255.9Bright
265.9Bright
275.9Bright
285.9Bright
295.8Bright
305.8Bright
315.8Bright
Planning a trip in July

Is July a good time to visit Grand Island?

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

6.5
Sightseeing
2nd-best month of the year
6.0
Beach & pool
2nd-best month of the year

July is a reasonable time to visit Grand Island for sightseeing.

What to pack for Grand Island in July

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

In July, Grand Island sees daytime highs around 78°F and nights near 66°F. Pack sun protection. Worth having: light clothes and rain gear. About 13 days see rain.

sun protectionlight clothesrain gear

Sea temperature near Grand Island in July

The nearest coast averages about 72°F in July — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 14 mi away) is warmest in August at about 74°F and coldest in February near 34°F.

It's comfortable for a long swim from Jul 4 to Sep 20 — about 2.6 months when the water holds above 68°F.

30°40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan37Bracing
Feb34Bracing
Mar34Bracing
Apr38Bracing
May48Bracing
Jun62Cool
Jul72Refreshing
Aug74Refreshing
Sep69Refreshing
Oct60Cool
Nov50Bracing
Dec43Bracing

UV index in Grand Island in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July 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 June 20 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 1 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 20UV 8Dec 21UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr5High
May7High
Jun8Very high
Jul8Very high
Aug6High
Sep6High
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Grand Island?

Grand Island sits at 43.0°N, 79.0°W, 584 ft above sea level, in United States. The nearest listed city is North Tonawanda, 5.0 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 108 ft around an average of 594 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 459 ft; within 50 miles, large variations in elevation — a maximum elevation change of 1,985 ft.

The land around Grand Island is covered by trees (55%) and grassland (34%) within 2 miles, trees (35%), grassland (26%) and artificial surfaces (20%) within 10 miles, and water (40%) and trees (31%) within 50 miles.

2 miles
108 ft
10 miles
459 ft
50 miles
1,985 ft
treesgrasslandcroplandartificial surfaceswater
July weather nearby: North Tonawanda 5.0 mi · Niagara Falls 6.2 mi · Kenmore 6.8 mi · Niagara Falls 6.8 mi · Amherst 9.3 mi · Fort Erie 9.3 mi · Eggertsville 9.3 mi · Buffalo 11 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 (43.0331°, -78.9625°, elevation 584 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).