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Winter Weather at Cassidy International Airport Kiribati

Daily high temperatures are around 85°F, rarely falling below 82°F or exceeding 87°F. The lowest daily average high temperature is 84°F on January 25.

Daily low temperatures are around 77°F, rarely falling below 75°F or exceeding 81°F. The highest daily average low temperature is 78°F on January 5.

For reference, on June 7, the hottest day of the year, temperatures at Cassidy International Airport typically range from 78°F to 86°F, while on February 5, the coldest day of the year, they range from 77°F to 84°F.

Average High and Low Temperature in the Winter at Cassidy International Airport

Average High and Low Temperature in the Winter at Cassidy International AirportDecJanFeb74°F74°F76°F76°F78°F78°F80°F80°F82°F82°F84°F84°F86°F86°F88°F88°F90°F90°F92°F92°F94°F94°F96°F96°FFallSpringJan 2584°FJan 2584°F77°F77°FDec 185°FDec 185°F78°F78°FFeb 2885°FFeb 2885°F78°F78°FJan 185°FJan 185°F78°F78°F
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 winter temperatures. 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 the Winter at Cassidy International Airport

Average Hourly Temperature in the Winter at Cassidy International AirportDecJanFeb12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMFallSpringwarmhot
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.

Fortaleza, Brazil (8,222 miles away); Fernando de Noronha (Distrito Estadual), Brazil (8,645 miles); and Tibanbang, Philippines (5,285 miles) are the far-away foreign places with temperatures most similar to Cassidy International Airport (view comparison).

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The winter at Cassidy International Airport experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 52% throughout the season. The highest chance of overcast or mostly cloudy conditions is 55% on January 14.

The clearest day of the winter is February 18, with clear, mostly clear, or partly cloudy conditions 50% of the time.

For reference, on April 20, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 56%, while on August 25, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 66%.

Cloud Cover Categories in the Winter at Cassidy International Airport

Cloud Cover Categories in the Winter at Cassidy International AirportDecJanFeb0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%FallSpringAug 2566%Aug 2566%Dec 148%Dec 148%Feb 2850%Feb 2850%Jan 147%Jan 147%Feb 147%Feb 147%clearmostly 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.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At Cassidy International Airport, the chance of a wet day over the course of the winter is very rapidly increasing, starting the season at 10% and ending it at 21%.

For reference, the year's highest daily chance of a wet day is 34% on April 18, and its lowest chance is 6% on September 6.

Probability of Precipitation in the Winter at Cassidy International Airport

Probability of Precipitation in the Winter at Cassidy International AirportDecJanFeb0%0%5%5%10%10%15%15%20%20%25%25%FallSpringDec 110%Dec 110%Feb 2821%Feb 2821%Jan 117%Jan 117%Feb 119%Feb 119%rain
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 season and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during the winter at Cassidy International Airport is rapidly increasing, starting the season at 1.8 inches, when it rarely exceeds 6.0 inches or falls below -0.0 inches, and ending the season at 2.8 inches, when it rarely exceeds 7.7 inches.

The highest average 31-day accumulation is 2.8 inches on February 20.

Average Monthly Rainfall in the Winter at Cassidy International Airport

Average Monthly Rainfall in the Winter at Cassidy International AirportDecJanFeb0 in0 in2 in2 in4 in4 in6 in6 in8 in8 in10 in10 in12 in12 in14 in14 inFallSpringFeb 192.8 inFeb 192.8 inDec 11.8 inDec 11.8 inJan 12.4 inJan 12.4 inFeb 12.8 inFeb 12.8 in
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 snowfall.

Over the course of the winter at Cassidy International Airport, the length of the day is essentially constant. The shortest day of the winter is December 19, with 12 hours, 1 minute of daylight and the longest day is February 28, with 12 hours, 5 minutes of daylight.

Hours of Daylight and Twilight in the Winter at Cassidy International Airport

Hours of Daylight and Twilight in the Winter at Cassidy International AirportDecJanFeb0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrFallSpringDec 2112 hr, 1 minDec 2112 hr, 1 minnightnightdaydayFeb 2812 hr, 5 minFeb 2812 hr, 5 minFeb 112 hr, 2 minFeb 112 hr, 2 min
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 winter at Cassidy International Airport is 6:18 AM on December 1 and the latest sunrise is 24 minutes later at 6:42 AM on February 7.

The earliest sunset is 6:19 PM on December 1 and the latest sunset is 26 minutes later at 6:45 PM on February 14.

Daylight saving time is not observed at Cassidy International Airport during 2024.

For reference, on June 20, the longest day of the year, the Sun rises at 6:24 AM and sets 12 hours, 14 minutes later, at 6:38 PM, while on December 21, the shortest day of the year, it rises at 6:27 AM and sets 12 hours, 1 minute later, at 6:28 PM.

Sunrise & Sunset with Twilight in the Winter at Cassidy International Airport

Sunrise & Sunset with Twilight in the Winter at Cassidy International AirportDecJanFeb2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMFallSpring6:18 AM6:18 AMDec 16:19 PMDec 16:19 PM6:41 AM6:41 AMFeb 146:45 PMFeb 146:45 PM6:32 AM6:32 AMJan 16:33 PMJan 16:33 PMSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day in the winter. 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.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

Solar Elevation and Azimuth in the Winter at Cassidy International Airport

Solar Elevation and Azimuth in the Winter at Cassidy International AirportDecJanFeb12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMFallSpring
northeastsouthwest
Solar elevation and azimuth in the the winter of 2024. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

The figure below presents a compact representation of key lunar data for the winter of 2024. 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 the Winter at Cassidy International Airport

Moon Rise, Set & Phases in the Winter at Cassidy International AirportDecJanFeb12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMFallSpringNov 22:48 AMNov 22:48 AMNov 1611:29 AMNov 1611:29 AMDec 18:22 PMDec 18:22 PMDec 1511:02 PMDec 1511:02 PMDec 3112:28 PMDec 3112:28 PMJan 1412:28 PMJan 1412:28 PMJan 302:37 AMJan 302:37 AMFeb 133:54 AMFeb 133:54 AMFeb 282:45 PMFeb 282:45 PMMar 148:55 PMMar 148:55 PMMar 3012:58 AMMar 3012:58 AM6:17 AM6:17 AM5:25 PM5:25 PM6:06 PM6:06 PM6:06 PM6:06 PM6:47 AM6:47 AM6:44 PM6:44 PM5:54 PM5:54 PM6:32 AM6:32 AM7:20 PM7:20 PM6:27 PM6:27 PM6:55 AM6:55 AM6:29 AM6:29 AM6:51 PM6:51 PM6:34 PM6:34 PM6:55 AM6:55 AM7:11 PM7:11 PM
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.

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 Cassidy International Airport is essentially constant during the winter, remaining around 100% throughout.

Humidity Comfort Levels in the Winter at Cassidy International Airport

Humidity Comfort Levels in the Winter at Cassidy International AirportDecJanFeb0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%FallSpringJan 15100%Jan 15100%Dec 1100%Dec 1100%Feb 28100%Feb 28100%Jan 1100%Jan 1100%Feb 1100%Feb 1100%miserablemiserableoppressiveoppressivemuggymuggy
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.

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 Cassidy International Airport is gradually increasing during the winter, increasing from 13.7 miles per hour to 14.5 miles per hour over the course of the season.

For reference, on January 12, the windiest day of the year, the daily average wind speed is 15.3 miles per hour, while on May 22, the calmest day of the year, the daily average wind speed is 11.9 miles per hour.

The highest daily average wind speed during the winter is 15.3 miles per hour on January 13.

Average Wind Speed in the Winter at Cassidy International Airport

Average Wind Speed in the Winter at Cassidy International AirportDecJanFeb0 mph0 mph5 mph5 mph10 mph10 mph15 mph15 mphFallSpringJan 1315.3 mphJan 1315.3 mphDec 113.7 mphDec 113.7 mphFeb 2814.5 mphFeb 2814.5 mphFeb 115.1 mphFeb 115.1 mph
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 Cassidy International Airport throughout the winter is predominantly from the east, with a peak proportion of 95% on December 21.

Wind Direction in the Winter at Cassidy International Airport

Wind Direction in the Winter at Cassidy International AirportDecJanFeb0%100%20%80%40%60%60%40%80%20%100%0%FallSpringeastnorth
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).

Cassidy International 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 Cassidy International Airport is essentially constant during the winter, remaining around 80°F throughout.

The lowest average surface water temperature during the winter is 80°F on January 29.

Average Water Temperature in the Winter at Cassidy International Airport

Average Water Temperature in the Winter at Cassidy International AirportDecJanFeb76°F76°F77°F77°F78°F78°F79°F79°F80°F80°F81°F81°F82°F82°F83°F83°F84°F84°F85°F85°FFallSpringJan 2980°FJan 2980°FDec 181°FDec 181°FFeb 2880°FFeb 2880°FJan 180°FJan 180°F
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 at Cassidy International Airport 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 the Winter at Cassidy International Airport

Time Spent in Various Temperature Bands and the Growing Season in the Winter at Cassidy International AirportDecJanFeb0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%FallSpring100%Jan 15100%Jan 15warmhotcomfortable
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 Cassidy International Airport are very rapidly decreasing during the winter, decreasing by 8,559°F, from 10,303°F to 1,744°F, over the course of the season.

Growing Degree Days in the Winter at Cassidy International Airport

Growing Degree Days in the Winter at Cassidy International AirportDecJanFeb2,000°F2,000°F4,000°F4,000°F6,000°F6,000°F8,000°F8,000°F10,000°F10,000°FFallSpringDec 110,303°FDec 110,303°FFeb 281,744°FFeb 281,744°F
The average growing degree days accumulated over the course of the winter, 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 at Cassidy International Airport is essentially constant during the winter, remaining within 0.3 kWh of 6.5 kWh throughout.

Average Daily Incident Shortwave Solar Energy in the Winter at Cassidy International Airport

Average Daily Incident Shortwave Solar Energy in the Winter at Cassidy International AirportDecJanFeb0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhFallSpringDec 16.4 kWhDec 16.4 kWhFeb 286.7 kWhFeb 286.7 kWhJan 16.3 kWhJan 16.3 kWhFeb 16.5 kWhFeb 16.5 kWh
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 Cassidy International Airport are 1.986 deg latitude, -157.350 deg longitude, and 20 ft elevation.

The topography within 2 miles of Cassidy International Airport is essentially flat, with a maximum elevation change of 52 feet and an average elevation above sea level of 8 feet. Within 10 miles is also essentially flat (75 feet). Within 50 miles is also essentially flat (92 feet).

The area within 2 miles of Cassidy International Airport is covered by water (100%), within 10 miles by water (99%), and within 50 miles by water (100%).

This report illustrates the typical weather at Cassidy International 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

Cassidy International 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.

There are no other weather stations in our network within 200 kilometers of this location. Consequently, in the case of missing or erroneous measurements from this station, we fall back on NASA's MERRA-2 modern-era reanalysis , adjusted according to typical seasonal and diurnal differences between this station and the wide-area MERRA-2 reconstructed values.

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 © OpenStreetMap contributors.

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.

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