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Average Weather in October in Roanoke Alabama, United States

Daily low temperatures decrease by 11°F, from 59°F to 48°F, rarely falling below 36°F or exceeding 68°F.

For reference, on July 23, the hottest day of the year, temperatures in Roanoke typically range from 71°F to 89°F, while on January 24, the coldest day of the year, they range from 36°F to 54°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 Roanoke18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM4 AM8 AM12 PM4 PM8 PM12 AMSepNovvery coldcoldcoldcoolcomfortablewarmhot
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < very cold < 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.

Baiyun, China (8,056 miles away) is the far-away foreign place with temperatures most similar to Roanoke (view comparison).

Clouds

The month of October in Roanoke experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 35% throughout the month. The lowest chance of overcast or mostly cloudy conditions is 33% on October 8.

The clearest day of the month is October 8, with clear, mostly clear, or partly cloudy conditions 67% of the time.

For reference, on January 4, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 54%, while on October 8, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 67%.

Cloud Cover Categories in October

Cloud Cover Categories in October in Roanoke1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%SepNovJan 446%Jan 446%Oct 166%Oct 166%Oct 3164%Oct 3164%Oct 1167%Oct 1167%Oct 2165%Oct 2165%clearmostly clearpartly cloudymostly cloudyovercast
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.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Roanoke, the chance of a wet day over the course of October is essentially constant, remaining around 21% throughout.

For reference, the year's highest daily chance of a wet day is 46% on July 9, and its lowest chance is 19% on October 15.

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).

Rainfall

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 Roanoke is essentially constant, remaining about 2.8 inches throughout, and rarely exceeding 5.8 inches or falling below 0.6 inches.

The lowest average 31-day accumulation is 2.7 inches on October 18.

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.

Sun

Over the course of October in Roanoke, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 58 minutes, implying an average daily decrease of 1 minute, 56 seconds, and weekly decrease of 13 minutes, 35 seconds.

The shortest day of the month is October 31, with 10 hours, 51 minutes of daylight and the longest day is October 1, with 11 hours, 50 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 Roanoke is 6:35 AM on October 1 and the latest sunrise is 23 minutes later at 6:59 AM on October 31.

The latest sunset is 6:25 PM on October 1 and the earliest sunset is 35 minutes earlier at 5:50 PM on October 31.

Daylight saving time is observed in Roanoke 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 5:32 AM and sets 14 hours, 21 minutes later, at 7:53 PM, while on December 21, the shortest day of the year, it rises at 6:40 AM and sets 9 hours, 58 minutes later, at 4:38 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.

Humidity

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 Roanoke is very rapidly decreasing during October, falling from 30% to 7% over the course of the month.

For reference, on July 24, the muggiest day of the year, there are muggy conditions 93% of the time, while on January 16, 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 Roanoke1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%10%20%30%40%50%60%70%80%90%100%SepNovOct 130%Oct 130%Oct 317%Oct 317%Oct 1118%Oct 1118%Oct 2111%Oct 2111%oppressiveoppressivemuggymuggyhumidhumiddrydrycomfortablecomfortable
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.

Wind

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 Roanoke is essentially constant during October, remaining within 0.1 miles per hour of 4.1 miles per hour throughout.

For reference, on February 26, the windiest day of the year, the daily average wind speed is 4.9 miles per hour, while on August 7, the calmest day of the year, the daily average wind speed is 3.0 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 hourly average wind direction in Roanoke throughout October is predominantly from the east, with a peak proportion of 41% on October 1.

Wind Direction in October

Wind Direction in October in RoanokeEN1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%SepNovsoutheastnorthwest
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).

Growing Season

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season in Roanoke typically lasts for 7.8 months (237 days), from around March 21 to around November 13, rarely starting before February 25 or after April 10, and rarely ending before October 25 or after December 1.

The month of October in Roanoke is more likely than not fully within the growing season, with the chance that a given day is in the growing season decreasing from 100% to 81% over the course of the month.

Time Spent in Various Temperature Bands and the Growing Season in October

Time Spent in Various Temperature Bands and the Growing Season in October in Roanokegrowing season1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%SepNov100%Oct 1100%Oct 181%Oct 3181%Oct 3199%Oct 1199%Oct 1195%Oct 2195%Oct 2150%Nov 1350%Nov 13very coldcoldcoolcomfortablewarmhotfreezing
The percentage of time spent in various temperature bands: frigid < 15°F < freezing < 32°F < very cold < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The black line is the percentage chance that a given day is within the growing season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

The average accumulated growing degree days in Roanoke are increasing during October, increasing by 396°F, from 4,496°F to 4,892°F, over the course of the month.

Growing Degree Days in October

The average growing degree days accumulated over the course of October, with 25th to 75th and 10th to 90th percentile bands.

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 Roanoke is decreasing during October, falling by 1.1 kWh, from 5.0 kWh to 3.9 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.

Topography

For the purposes of this report, the geographical coordinates of Roanoke are 33.151 deg latitude, -85.372 deg longitude, and 823 ft elevation.

The topography within 2 miles of Roanoke contains only modest variations in elevation, with a maximum elevation change of 207 feet and an average elevation above sea level of 815 feet. Within 10 miles contains only modest variations in elevation (784 feet). Within 50 miles contains significant variations in elevation (2,172 feet).

The area within 2 miles of Roanoke is covered by trees (42%), cropland (41%), and artificial surfaces (17%), within 10 miles by trees (80%) and cropland (18%), and within 50 miles by trees (80%) and cropland (13%).

Data Sources

This report illustrates the typical weather in Roanoke 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 5 weather stations near enough to contribute to our estimation of the temperature and dew point in Roanoke.

For each station, the records are corrected for the elevation difference between that station and Roanoke 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 Roanoke is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Roanoke and a given station.

The stations contributing to this reconstruction are: La Grange, Callaway Airport (39%, 32 kilometers, southeast); West Georgia Regional Airport - O V Gray Field (16%, 57 kilometers, north); Auburn-Opelika Robert G Pitts Airport (16%, 60 kilometers, south); Thomas C Russell Field (15%, 61 kilometers, southwest); and Anniston Metropolitan Airport (13%, 66 kilometers, northwest).

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.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.