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Average Weather in October in Grand Island Nebraska, United States

In Grand Island, the month of October is characterized by rapidly falling daily high temperatures, with daily highs decreasing by 14°F, from 72°F to 58°F over the course of the month, and rarely exceeding 84°F or dropping below 42°F.

Daily low temperatures decrease by 12°F, from 48°F to 36°F, rarely falling below 24°F or exceeding 60°F.

For reference, on July 20, the hottest day of the year, temperatures in Grand Island typically range from 66°F to 88°F, while on January 2, the coldest day of the year, they range from 17°F to 35°F.

Average High and Low Temperature in October

The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on October. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature in October

Average Hourly Temperature in October in Grand Island12 AM4 AM8 AM12 PM4 PM8 PM12 AM181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930303131SepNovchillycoldcoolcomfortablewarmfreezing
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < chilly < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The shaded overlays indicate night and civil twilight.


The month of October in Grand Island experiences increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 31% to 39%.

The clearest day of the month is October 1, with clear, mostly clear, or partly cloudy conditions 69% of the time.

For reference, on March 4, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 49%, while on July 8, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 74%.

Cloud Cover in October

The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.


A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Grand Island, the chance of a wet day over the course of October is very rapidly decreasing, starting the month at 20% and ending it at 11%.

For reference, the year's highest daily chance of a wet day is 41% on June 7, and its lowest chance is 5% on January 11.

Probability of Precipitation in October

The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).


To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during October in Grand Island is decreasing, starting the month at 2.0 inches, when it rarely exceeds 3.9 inches or falls below 0.4 inches, and ending the month at 1.1 inches, when it rarely exceeds 2.5 inches or falls below 0.1 inches.

Average Monthly Rainfall in October

The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average liquid-equivalent snowfall.


Over the course of October in Grand Island, the length of the day is rapidly decreasing. From the start to the end of the month, the length of the day decreases by 1 hour, 18 minutes, implying an average daily decrease of 2 minutes, 35 seconds, and weekly decrease of 18 minutes, 8 seconds.

The shortest day of the month is October 31, with 10 hours, 27 minutes of daylight and the longest day is October 1, with 11 hours, 45 minutes of daylight.

Hours of Daylight and Twilight in October

The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise of the month in Grand Island is 7:30 AM on October 1 and the latest sunrise is 33 minutes later at 8:03 AM on October 31.

The latest sunset is 7:14 PM on October 1 and the earliest sunset is 45 minutes earlier at 6:30 PM on October 31.

Daylight saving time is observed in Grand Island during 2017, but it neither starts nor ends during October, so the entire month is in daylight saving time.

For reference, on June 21, the longest day of the year, the Sun rises at 6:01 AM and sets 15 hours, 7 minutes later, at 9:08 PM, while on December 21, the shortest day of the year, it rises at 7:54 AM and sets 9 hours, 14 minutes later, at 5:08 PM.

Sunrise & Sunset with Twilight and Daylight Saving Time in October

The solar day over the course of October. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.


We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The chance that a given day will be muggy in Grand Island is essentially constant during October, remaining within 1% of 1% throughout.

For reference, on July 23, the muggiest day of the year, there are muggy conditions 47% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in October

Humidity Comfort Levels in October in Grand Island0%10%20%30%40%50%60%70%80%90%100%181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930303131SepNovOct 12%Oct 12%Oct 310%Oct 310%Oct 110%Oct 110%Oct 210%Oct 210%oppressiveoppressivemuggymuggyhumidhumidcomfortablecomfortabledrydry
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.


This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Grand Island is essentially constant during October, remaining within 0.1 miles per hour of 6.1 miles per hour throughout.

For reference, on April 11, the windiest day of the year, the daily average wind speed is 7.3 miles per hour, while on August 5, the calmest day of the year, the daily average wind speed is 4.9 miles per hour.

Average Wind Speed in October

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
The wind direction in Grand Island during October is predominantly out of the south from October 1 to October 19 and the north from October 19 to October 31.

Wind Direction in October

Wind Direction in October in Grand IslandSN0%20%40%60%80%100%181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930303131SepNovwestsoutheastnorth
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Solar Energy

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy in Grand Island is decreasing during October, falling by 1.4 kWh, from 4.6 kWh to 3.2 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in October

The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.


For the purposes of this report, the geographical coordinates of Grand Island are 40.925 deg latitude, -98.342 deg longitude, and 1,854 ft elevation.

The topography within 2 miles of Grand Island is essentially flat, with a maximum elevation change of 52 feet and an average elevation above sea level of 1,853 feet. Within 10 miles is essentially flat (171 feet). Within 50 miles contains only modest variations in elevation (955 feet).

The area within 2 miles of Grand Island is covered by artificial surfaces (74%) and cropland (21%), within 10 miles by cropland (79%) and grassland (17%), and within 50 miles by cropland (73%) and grassland (26%).

Data Sources

This report illustrates the typical weather in Grand Island year round, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Temperature and Dew Point

There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Grand Island.

For each station, the records are corrected for the elevation difference between that station and Grand Island according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

The estimated value at Grand Island is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Grand Island and a given station.

The stations contributing to this reconstruction are: Central Nebraska Regional Airport (94%, 4.6 kilometers, northeast); Hastings Municipal Airport (4.2%, 37 kilometers, south); and Kearney Municipal Airport (2.0%, 59 kilometers, west).

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for aiports and weather stations are provided by AskGeo.com .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.