Daily high temperatures are around 86°F, rarely falling below 83°F or exceeding 89°F.
Daily low temperatures are around 78°F, rarely falling below 75°F or exceeding 81°F.
For reference, on February 26, the hottest day of the year, temperatures in Aūa typically range from 79°F to 88°F, while on July 22, the coldest day of the year, they range from 77°F to 84°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
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.
The month of October in Aūa experiences very rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 55% to 74%.
The clearest day of the month is October 1, with clear, mostly clear, or partly cloudy conditions 45% of the time.
For reference, on January 6, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 88%, while on August 25, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 61%.
Cloud Cover Categories 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 Aūa, the chance of a wet day over the course of October is very rapidly increasing, starting the month at 37% and ending it at 50%.
For reference, the year's highest daily chance of a wet day is 63% on January 16, and its lowest chance is 17% on July 29.
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 Aūa is very rapidly increasing, starting the month at 3.7 inches, when it rarely exceeds 7.3 inches or falls below 0.9 inches, and ending the month at 6.0 inches, when it rarely exceeds 10.0 inches or falls below 2.8 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 Aūa, the length of the day is gradually increasing. From the start to the end of the month, the length of the day increases by 23 minutes, implying an average daily increase of 46 seconds, and weekly increase of 5 minutes, 25 seconds.
The shortest day of the month is October 1, with 12 hours, 14 minutes of daylight and the longest day is October 31, with 12 hours, 37 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 latest sunrise of the month in Aūa is 6:05 AM on October 1 and the earliest sunrise is 18 minutes earlier at 5:47 AM on October 31.
The earliest sunset is 6:19 PM on October 1 and the latest sunset is 6 minutes later at 6:24 PM on October 31.
Daylight saving time is not observed in Aūa during 2018.
For reference, on December 21, the longest day of the year, the Sun rises at 5:51 AM and sets 12 hours, 59 minutes later, at 6:50 PM, while on June 21, the shortest day of the year, it rises at 6:46 AM and sets 11 hours, 17 minutes later, at 6:03 PM.
Sunrise & Sunset with Twilight 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 Aūa is essentially constant during October, remaining around 100% throughout.
For reference, on January 1, the muggiest day of the year, there are muggy conditions 100% of the time, while on July 24, the least muggy day of the year, there are muggy conditions 98% of the time.
Humidity Comfort Levels in October
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 Aūa is decreasing during October, decreasing from 14.0 miles per hour to 12.7 miles per hour over the course of the month.
For reference, on July 29, the windiest day of the year, the daily average wind speed is 15.0 miles per hour, while on March 9, the calmest day of the year, the daily average wind speed is 10.4 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 Aūa throughout October is predominantly from the east, with a peak proportion of 86% on October 3.
Wind Direction in October
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).
Aūa 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 in Aūa is essentially constant during October, remaining around 82°F throughout.
Average Water Temperature in October
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.
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).
Temperatures in Aūa are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.
Time Spent in Various Temperature Bands and the Growing Season in October
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 Aūa are very rapidly increasing during October, increasing by 941°F, from 2,806°F to 3,748°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.
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 Aūa is essentially constant during October, remaining within 0.1 kWh of 5.9 kWh throughout.
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 Aūa are -14.276 deg latitude, -170.664 deg longitude, and 0 ft elevation.
The topography within 2 miles of Aūa contains very significant variations in elevation, with a maximum elevation change of 1,617 feet and an average elevation above sea level of 336 feet. Within 10 miles also contains very significant variations in elevation (1,932 feet). Within 50 miles also contains very significant variations in elevation (1,932 feet).
The area within 2 miles of Aūa is covered by trees (52%) and water (45%), within 10 miles by water (91%), and within 50 miles by water (100%).
This report illustrates the typical weather in Aūa 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 is only a single weather station, Pago Pago International Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Aūa.
At a distance of 8 kilometers from Aūa, closer than our threshold of 150 kilometers, this station is deemed sufficiently nearby to be relied upon as our primary source for temperature and dew point records.
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.
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.