Grand Island (NE) Temperature by Month

The average annual maximum temperature in Grand Island, Nebraska, United States of America is 17°C (63°F), with daytime highs ranging from 2°C (36°F) in January to 31°C (88°F) in July. This page covers monthly averages, day-night differences, and how Grand Island compares to cities worldwide.

In Grand Island, temperatures can shift dramatically between very warm in summer and cold in winter. Nights follow the same pattern, with lows ranging from 18°C (64°F) in July to -9°C (16°F) in January.

The chart below illustrates the average maximum day and minimum night temperatures in Grand Island by month:

Temperatures tend to bottom out between 4 AM and 6 AM, then climb to their daily peak around 3 PM.

The chart below shows the average temperature throughout the year:

Grand Island's average annual maximum temperature is 17°C (63°F). To put that in context, here's how it compares to a few well-known destinations:

Athens, Greece sits at 23°C (73°F) on average, with hot dry summers and mild winters characteristic of the Mediterranean.

Reykjavík, Iceland averages 9°C (48°F) a year, mild summers by Icelandic standards, but cold winters and frequent wind.

Boston, USA averages 16°C (61°F) annually, with four distinct seasons and cold winters that rival northern Europe.

Tokyo, Japan averages 21°C (70°F) a year, with hot summers, cool winters, and a well-defined cherry blossom spring.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained, so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.

For more on Grand Island's weather, including monthly rainfall, sunshine hours, and humidity, visit our Grand Island climate page.