Grand Island in Summer
In summer (June, July and August), Grand Island sees average daytime highs around 84°F and overnight lows near 64°F, with 10.1 in of rain over about 28 wet days across the season. It is the warmest season of the year and the 2nd-wettest season.
Over the season highs climb from about 78°F in early June to 83°F by late August. The sky is clear or mostly clear about 48% of the time across summer, and the air most often feels humid.
Summer is Grand Island's best season of the year to visit on our travel score. For the whole year in context, see Grand Island's year-round climate.
- Avg daytime high
- 84°F
- warmest season of the year
- Avg overnight low
- 64°F
- Rainfall
- 10.1 in
- 28 wet days
- Avg wind
- 9 mph
- Travel score
- 5.7
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Grand Island in Summer
Over the season highs climb from about 78°F in early June to 83°F by late August.
A typical summer day in Grand Island reaches about 84°F and drops to 64°F overnight. The warmest of the three months is July, the coolest June.
How summer really feels in Grand Island
Once humidity and wind are folded in, summer brings about 0 days that feel above 90°F and 0 that feel at or below 32°F.
summer 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 the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 35° / 16° | 0.8 | 4 | 3.6 | 9.4 | 0.0 |
| Feb | 40° / 19° | 0.9 | 4.3 | 3.4 | 10.4 | 0.1 |
| Mar | 51° / 29° | 2.0 | 6.9 | 2.5 | 11.7 | 2.7 |
| Apr | 61° / 39° | 3.4 | 9.6 | 1.4 | 13.1 | 5.2 |
| May | 71° / 51° | 5.1 | 12.3 | 0.1 | 14.3 | 6.3 |
| Jun | 82° / 62° | 4.1 | 10.3 | 0 | 14.9 | 6.1 |
| Jul | 86° / 66° | 3.0 | 9 | 0 | 14.6 | 5.2 |
| Aug | 84° / 64° | 3.0 | 8.9 | 0 | 13.6 | 5.9 |
| Sep | 77° / 55° | 2.4 | 7.1 | 0 | 12.3 | 7.5 |
| Oct | 64° / 41° | 2.5 | 6.7 | 0.7 | 10.9 | 6.3 |
| Nov | 49° / 29° | 1.3 | 4.9 | 1.9 | 9.7 | 2.5 |
| Dec | 38° / 19° | 1.0 | 4.2 | 3.4 | 9.1 | 0.0 |
Cloud cover in Summer
The sky is clear or mostly clear about 48% of the time across summer.
Chance of precipitation in Summer
Grand Island gets around 10.1 in of rain over 28 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 9 mph across summer.
Sunrise & sunset in Summer
Daylight runs from about 14 h 42 min in early June to 13 hours by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 6.5 kWh/m².
Hazard calendar for Grand Island
In summer, Grand Island overlaps 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.
Is summer a good time to visit Grand Island?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer 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 Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Grand Island sees daytime highs around 84°F and nights near 64°F. Pack light clothes and sun protection. Worth having: rain gear. About 28 days see rain.
UV index in Grand Island in Summer
Clear-sky midday UV across summer averages around 8 (very high — sun protection essential). 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 3 | 4 | 6 | 7 | 9 | 9 | 8 | 6 | 5 | 3 | 2 |
| Level | Low | Moderate | Moderate | High | High | Very high | Very high | Very high | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 3 | Moderate |
| Mar | 4 | Moderate |
| Apr | 6 | High |
| May | 7 | High |
| Jun | 9 | Very high |
| Jul | 9 | Very high |
| Aug | 8 | Very high |
| Sep | 6 | High |
| Oct | 5 | Moderate |
| Nov | 3 | Moderate |
| Dec | 2 | Low |
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.
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
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.