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October Weather at Aurora State Airport Oregon, United States

Daily high temperatures decrease by 13°F, from 72°F to 58°F, rarely falling below 52°F or exceeding 83°F.

Daily low temperatures decrease by 5°F, from 49°F to 44°F, rarely falling below 34°F or exceeding 56°F.

For reference, on August 3, the hottest day of the year, temperatures at Aurora State Airport typically range from 56°F to 85°F, while on December 30, the coldest day of the year, they range from 36°F to 46°F.

Average High and Low Temperature in October at Aurora State Airport

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 at Aurora State Airport

Average Hourly Temperature in October at Aurora State Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMSepNovNowNowvery coldvery coldcoldcoolcoolcomfortablewarm
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 average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Bastida / Labastida, Spain (5,339 miles away) is the far-away foreign place with temperatures most similar to Aurora State Airport (view comparison).

Compare Aurora State Airport to another city:

Clouds

The month of October at Aurora State Airport experiences very rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 43% to 65%.

The clearest day of the month is October 1, with clear, mostly clear, or partly cloudy conditions 57% of the time.

For reference, on January 16, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 76%, while on August 3, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 82%.

Cloud Cover Categories in October at Aurora State Airport

Cloud Cover Categories in October at Aurora State Airport1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%SepNovOct 157%Oct 157%Oct 3135%Oct 3135%Oct 1150%Oct 1150%Oct 2141%Oct 2141%NowNowclearmostly clearpartly cloudymostly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At Aurora State Airport, the chance of a wet day over the course of October is very rapidly increasing, starting the month at 25% and ending it at 46%.

For reference, the year's highest daily chance of a wet day is 58% on November 27, and its lowest chance is 4% on August 5.

Probability of Precipitation in October at Aurora State Airport

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 at Aurora State Airport is very rapidly increasing, starting the month at 2.8 inches, when it rarely exceeds 5.6 inches or falls below 0.5 inches, and ending the month at 6.7 inches, when it rarely exceeds 11.1 inches or falls below 2.7 inches.

Average Monthly Rainfall in October at Aurora State Airport

Average Monthly Rainfall in October at Aurora State Airport1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 in0 in2 in2 in4 in4 in6 in6 in8 in8 in10 in10 in12 in12 in14 in14 in16 in16 inSepNovOct 12.8 inOct 12.8 inOct 316.7 inOct 316.7 inOct 113.8 inOct 113.8 inOct 215.1 inOct 215.1 inNowNow
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 at Aurora State Airport, 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, 31 minutes, implying an average daily decrease of 3 minutes, 1 second, and weekly decrease of 21 minutes, 10 seconds.

The shortest day of the month is October 31, with 10 hours, 10 minutes of daylight and the longest day is October 1, with 11 hours, 41 minutes of daylight.

Hours of Daylight and Twilight in October at Aurora State Airport

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 at Aurora State Airport is 7:09 AM on October 1 and the latest sunrise is 40 minutes later at 7:49 AM on October 31.

The latest sunset is 6:50 PM on October 1 and the earliest sunset is 51 minutes earlier at 5:59 PM on October 31.

Daylight saving time is observed at Aurora State Airport during 2021, 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 5:23 AM and sets 15 hours, 39 minutes later, at 9:02 PM, while on December 21, the shortest day of the year, it rises at 7:47 AM and sets 8 hours, 44 minutes later, at 4:31 PM.

Sunrise & Sunset with Twilight and Daylight Saving Time in October at Aurora State Airport

Sunrise & Sunset with Twilight and Daylight Saving Time in October at Aurora State Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMSepNov7:09 AM7:09 AMOct 16:50 PMOct 16:50 PM7:49 AM7:49 AMOct 315:59 PMOct 315:59 PM7:22 AM7:22 AMOct 116:32 PMOct 116:32 PM7:35 AM7:35 AMOct 216:14 PMOct 216:14 PMSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
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.

Moon

The figure below presents a compact representation of key lunar data for October 2021. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

Moon Rise, Set & Phases in October at Aurora State Airport

Moon Rise, Set & Phases in October at Aurora State Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMSepNovSep 65:52 PMSep 65:52 PMSep 204:55 PMSep 204:55 PMOct 64:06 AMOct 64:06 AMOct 207:57 AMOct 207:57 AMNov 42:15 PMNov 42:15 PMNov 1912:58 AMNov 1912:58 AM5:58 AM5:58 AM8:02 PM8:02 PM7:33 PM7:33 PM7:30 AM7:30 AM7:22 AM7:22 AM7:12 PM7:12 PM6:17 PM6:17 PM7:30 AM7:30 AM7:33 AM7:33 AM6:03 PM6:03 PM4:26 PM4:26 PM7:35 AM7:35 AM
The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.

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 at Aurora State Airport is essentially constant during October, remaining around 0% throughout.

For reference, on July 16, the muggiest day of the year, there are muggy conditions 1% 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 at Aurora State Airport

Humidity Comfort Levels in October at Aurora State Airport1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%SepNovOct 10%Oct 10%Oct 310%Oct 310%Oct 110%Oct 110%Oct 210%Oct 210%NowNowcomfortablecomfortabledrydryhumidhumid
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

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 at Aurora State Airport is gradually increasing during October, increasing from 4.5 miles per hour to 5.2 miles per hour over the course of the month.

For reference, on December 3, the windiest day of the year, the daily average wind speed is 6.1 miles per hour, while on August 9, the calmest day of the year, the daily average wind speed is 4.1 miles per hour.

Average Wind Speed in October at Aurora State Airport

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 at Aurora State Airport throughout October is predominantly from the south, with a peak proportion of 46% on October 31.

Wind Direction in October at Aurora State Airport

Wind Direction in October at Aurora State AirportWNS1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%20%80%40%60%60%40%80%20%100%0%SepNovNowNowwestsoutheastnorth
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Water Temperature

Aurora State Airport is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average surface water temperature at Aurora State Airport is gradually decreasing during October, falling by 3°F, from 56°F to 54°F, over the course of the month.

Average Water Temperature in October at Aurora State Airport

Average Water Temperature in October at Aurora State Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313148°F48°F50°F50°F52°F52°F54°F54°F56°F56°F58°F58°F60°F60°F62°F62°FSepNovOct 156°FOct 156°FOct 3154°FOct 3154°FOct 1155°FOct 1155°FOct 2155°FOct 2155°FNowNow
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

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 at Aurora State Airport typically lasts for 7.4 months (226 days), from around March 28 to around November 9, rarely starting before March 1 or after April 21, and rarely ending before October 18 or after December 5.

The month of October at Aurora State Airport is more likely than not fully within the growing season, with the chance that a given day is in the growing season rapidly decreasing from 99% to 69% over the course of the month.

Time Spent in Various Temperature Bands and the Growing Season in October at Aurora State Airport

Time Spent in Various Temperature Bands and the Growing Season in October at Aurora State Airportgrowing season1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%SepNov99%Oct 199%Oct 169%Oct 3169%Oct 3196%Oct 1196%Oct 1187%Oct 2187%Oct 2150%Nov 950%Nov 9NowNowvery coldcoldcoolcomfortablewarmfreezing
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 percentage of time spent in various temperature bands. 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 at Aurora State Airport are gradually increasing during October, increasing by 169°F, from 2,302°F to 2,471°F, over the course of the month.

Growing Degree Days in October at Aurora State Airport

Growing Degree Days in October at Aurora State Airport1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031312,100°F2,100°F2,200°F2,200°F2,300°F2,300°F2,400°F2,400°F2,500°F2,500°F2,600°F2,600°F2,700°F2,700°FSepNovOct 12,302°FOct 12,302°FOct 312,471°FOct 312,471°FOct 112,381°FOct 112,381°FOct 212,435°FOct 212,435°FNowNow
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 at Aurora State Airport is rapidly decreasing during October, falling by 1.8 kWh, from 3.8 kWh to 2.0 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in October at Aurora State Airport

Average Daily Incident Shortwave Solar Energy in October at Aurora State Airport1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWhSepNovOct 13.8 kWhOct 13.8 kWhOct 312.0 kWhOct 312.0 kWhOct 113.2 kWhOct 113.2 kWhOct 212.6 kWhOct 212.6 kWhNowNow
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 Aurora State Airport are 45.254 deg latitude, -122.764 deg longitude, and 197 ft elevation.

The topography within 2 miles of Aurora State Airport contains only modest variations in elevation, with a maximum elevation change of 131 feet and an average elevation above sea level of 152 feet. Within 10 miles contains only modest variations in elevation (1,227 feet). Within 50 miles contains very significant variations in elevation (5,735 feet).

The area within 2 miles of Aurora State Airport is covered by cropland (70%) and artificial surfaces (30%), within 10 miles by cropland (63%) and artificial surfaces (27%), and within 50 miles by trees (43%) and cropland (26%).

Data Sources

This report illustrates the typical weather at Aurora State Airport, 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

Aurora State Airport has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required.

In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations.

The stations on which we may fall back include but are not limited to Portland-Hillsboro Airport, Mc Minnville Municipal Airport, Portland International Airport, Pearson Airpark, McNary Field, Portland–Troutdale Airport, Scappoose Industrial Airpark, and Southwest Washington Regional Airport.

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , 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 airports 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.