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September Weather in Kiribati Kiribati

Daily high temperatures are around 86°F, rarely falling below 84°F or exceeding 88°F.

Daily low temperatures are around 78°F, rarely falling below 76°F or exceeding 80°F.

For reference, on June 7, the hottest day of the year, temperatures in Kiribati 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 September in Kiribati

Average High and Low Temperature in September in KiribatiSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303074°F74°F76°F76°F78°F78°F80°F80°F82°F82°F84°F84°F86°F86°F88°F88°F90°F90°F92°F92°F94°F94°FAugOctSep 186°FSep 186°F78°F78°FSep 3086°FSep 3086°F78°F78°FSep 1186°FSep 1186°F78°F78°FSep 2186°FSep 2186°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 temperatures for the quarter of the year centered on September. 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 September in Kiribati

Average Hourly Temperature in September in KiribatiSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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 AMAugOctwarmwarmhot
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.
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The month of September in Kiribati experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 36% throughout the month.

The clearest day of the month is September 4, with clear, mostly clear, or partly cloudy conditions 66% 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 September in Kiribati

Cloud Cover Categories in September in KiribatiSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AugOctSep 165%Sep 165%Sep 3063%Sep 3063%Sep 1165%Sep 1165%Sep 2163%Sep 2163%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. In Kiribati, the chance of a wet day over the course of September is essentially constant, remaining around 7% throughout.

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 September in Kiribati

Probability of Precipitation in September in KiribatiSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%0%1%1%2%2%3%3%4%4%5%5%6%6%7%7%8%8%9%9%10%10%11%11%12%12%AugOctSep 36%Sep 36%Sep 308%Sep 308%Sep 117%Sep 117%Sep 217%Sep 217%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 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 September in Kiribati is essentially constant, remaining about 0.9 inches throughout, and rarely exceeding 2.6 inches or falling below -0.0 inches.

The lowest average 31-day accumulation is 0.8 inches on September 9.

Average Monthly Rainfall in September in Kiribati

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 September in Kiribati, the length of the day is essentially constant. The shortest day of the month is September 30, with 12 hours, 6 minutes of daylight and the longest day is September 1, with 12 hours, 8 minutes of daylight.

Hours of Daylight and Twilight in September in Kiribati

Hours of Daylight and Twilight in September in KiribatiSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrAugOctSep 2312 hr, 7 minSep 2312 hr, 7 minnightnightdaydaySep 112 hr, 8 minSep 112 hr, 8 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 latest sunrise of the month in Kiribati is 8:23 AM on September 1 and the earliest sunrise is 9 minutes earlier at 8:15 AM on September 30.

The latest sunset is 8:32 PM on September 1 and the earliest sunset is 11 minutes earlier at 8:21 PM on September 30.

Daylight saving time is not observed in Kiribati during 2024.

For reference, on June 20, the longest day of the year, the Sun rises at 8:23 AM and sets 12 hours, 12 minutes later, at 8:35 PM, while on December 21, the shortest day of the year, it rises at 8:24 AM and sets 12 hours, 3 minutes later, at 8:27 PM.

Sunrise & Sunset with Twilight in September in Kiribati

Sunrise & Sunset with Twilight in September in KiribatiSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930304 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM2 AMAugOct8:15 AM8:15 AMSep 308:21 PMSep 308:21 PM8:23 AM8:23 AMSep 18:32 PMSep 18:32 PM8:20 AM8:20 AMSep 118:28 PMSep 118:28 PMSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of September. 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 September in Kiribati

Solar Elevation and Azimuth in September in KiribatiSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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 AMAugOct0010102020203030404050505060607070800001010202030303040405050606060707080
northeastsouthwest
Solar elevation and azimuth over the course of September 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 September 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 September in Kiribati

Moon Rise, Set & Phases in September in KiribatiSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMAugOctAug 51:14 AMAug 51:14 AMAug 208:26 AMAug 208:26 AMSep 33:56 PMSep 33:56 PMSep 184:35 PMSep 184:35 PMOct 38:50 AMOct 38:50 AMOct 181:27 AMOct 181:27 AM8:02 AM8:02 AM8:32 PM8:32 PM8:11 PM8:11 PM8:34 AM8:34 AM8:17 AM8:17 AM8:39 PM8:39 PM8:32 PM8:32 PM8:57 AM8:57 AM8:16 AM8:16 AM8:34 PM8:34 PM7:58 PM7:58 PM8:27 AM8:27 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.
Sep 2024IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
4%6:48 AMENE7:15 PMWNW-1:03 PMN247,968 mi
2
1%7:34 AMENE7:58 PMWNW-1:47 PMN249,607 mi
3
0%8:17 AME8:39 PMW-2:29 PMN250,904 mi
4
1%8:57 AME9:18 PMW-3:08 PMN251,830 mi
5
4%9:37 AME9:56 PMW-3:46 PMS252,333 mi
6
8%10:16 AME10:34 PMW-4:25 PMS252,348 mi
7
14%10:56 AMESE11:14 PMWSW-5:04 PMS251,796 mi
8
22%11:39 AMESE11:57 PMWSW-5:46 PMS250,609 mi
9
30%12:24 PMESE--6:32 PMS248,736 mi
10
40%-12:42 AMWSW1:12 PMESE7:21 PMS246,171 mi
11
50%-1:32 AMWSW2:05 PMESE8:15 PMS242,965 mi
12
61%-2:26 AMWSW3:01 PMESE9:12 PMS239,247 mi
13
71%-3:23 AMWSW3:59 PMESE10:11 PMS235,233 mi
14
81%-4:22 AMWSW4:57 PMESE11:10 PMS231,220 mi
15
86%-5:20 AMWSW5:54 PMESE--
16
90%-6:17 AMWSW6:48 PMESE12:07 AMS227,560 mi
17
96%-7:12 AMWSW7:41 PME1:01 AMS224,614 mi
18
100%-8:05 AMW8:32 PME1:53 AMS222,694 mi
19
100%-8:57 AMW9:22 PME2:44 AMS222,007 mi
20
97%-9:50 AMW10:14 PMENE3:35 AMN222,615 mi
21
91%-10:44 AMWNW11:08 PMENE4:28 AMN224,422 mi
22
83%-11:41 AMWNW-5:23 AMN227,201 mi
23
72%12:04 AMENE12:39 PMWNW-6:21 AMN230,636 mi
24
61%1:03 AMENE1:39 PMWNW-7:20 AMN234,387 mi
25
50%2:02 AMENE2:38 PMWNW-8:20 AMN238,137 mi
26
39%3:00 AMENE3:34 PMWNW-9:18 AMN241,639 mi
27
29%3:55 AMENE4:26 PMWNW-10:11 AMN244,724 mi
28
21%4:45 AMENE5:14 PMWNW-11:01 AMN247,303 mi
29
13%5:32 AMENE5:58 PMWNW-11:46 AMN249,346 mi
30
7%6:16 AMENE6:39 PMW-12:28 PMN250,865 mi

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 Kiribati is essentially constant during September, remaining around 100% throughout.

Humidity Comfort Levels in September in Kiribati

Humidity Comfort Levels in September in KiribatiSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%AugOctSep 16100%Sep 16100%Sep 1100%Sep 1100%Sep 30100%Sep 30100%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 in Kiribati is essentially constant during September, remaining within 0.2 miles per hour of 13.2 miles per hour throughout.

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.

Average Wind Speed in September in Kiribati

Average Wind Speed in September in KiribatiSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mph16 mph16 mphAugOctSep 113.4 mphSep 113.4 mphSep 3013.1 mphSep 3013.1 mphSep 1613.2 mphSep 1613.2 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 in Kiribati throughout September is predominantly from the east, with a peak proportion of 88% on September 1.

Wind Direction in September in Kiribati

Wind Direction in September in KiribatiSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%20%80%40%60%60%40%80%20%100%0%AugOcteastsouth
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).

Kiribati 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 Kiribati is essentially constant during September, remaining around 82°F throughout.

Average Water Temperature in September in Kiribati

Average Water Temperature in September in KiribatiSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303078°F78°F79°F79°F80°F80°F81°F81°F82°F82°F83°F83°F84°F84°F85°F85°FAugOctSep 182°FSep 182°FSep 3082°FSep 3082°FSep 1182°FSep 1182°FSep 2182°FSep 2182°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 in Kiribati 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 September in Kiribati

Time Spent in Various Temperature Bands and the Growing Season in September in KiribatiSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AugOct100%Sep 16100%Sep 16warmhotcomfortable
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 in Kiribati are rapidly increasing during September, increasing by 900°F, from 7,502°F to 8,402°F, over the course of the month.

Growing Degree Days in September in Kiribati

Growing Degree Days in September in KiribatiSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930307,200°F7,200°F7,400°F7,400°F7,600°F7,600°F7,800°F7,800°F8,000°F8,000°F8,200°F8,200°F8,400°F8,400°F8,600°F8,600°FAugOctSep 17,502°FSep 17,502°FSep 308,402°FSep 308,402°FSep 117,812°FSep 117,812°FSep 218,122°FSep 218,122°F
The average growing degree days accumulated over the course of September, 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 Kiribati is essentially constant during September, remaining around 7.1 kWh throughout.

The highest average daily incident shortwave solar energy during September is 7.1 kWh on September 21.

Average Daily Incident Shortwave Solar Energy in September in Kiribati

Average Daily Incident Shortwave Solar Energy in September in KiribatiSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhAugOctSep 217.1 kWhSep 217.1 kWhSep 17.0 kWhSep 17.0 kWhSep 117.1 kWhSep 117.1 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 Kiribati are 1.421 deg latitude, 172.984 deg longitude, and 20 ft elevation.

The topography within 2 miles of Kiribati is essentially flat, with a maximum elevation change of 0 feet and an average elevation above sea level of 0 feet. Within 10 miles is also essentially flat (62 feet). Within 50 miles is also essentially flat (92 feet).

The area within 2 miles of Kiribati is covered by water (100%), within 10 miles by water (100%), and within 50 miles by water (100%).

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

The details of the data sources used for this report can be found on the Cassidy International Airport page.

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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.

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