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July Weather in Adamstown Pitcairn Islands

Daily high temperatures are around 71°F, rarely falling below 68°F or exceeding 74°F.

Daily low temperatures are around 70°F, rarely falling below 66°F or exceeding 73°F.

For reference, on February 28, the hottest day of the year, temperatures in Adamstown typically range from 77°F to 78°F, while on September 5, the coldest day of the year, they range from 69°F to 70°F.

Average High and Low Temperature in July in Adamstown

Average High and Low Temperature in July in Adamstown18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313165°F65°F66°F66°F67°F67°F68°F68°F69°F69°F70°F70°F71°F71°F72°F72°F73°F73°F74°F74°F75°F75°F76°F76°FJunAugJul 172°FJul 172°F70°F70°FJul 3171°FJul 3171°F69°F69°FJul 1171°FJul 1171°F70°F70°FJul 2171°FJul 2171°F69°F69°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 July. 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 July in Adamstown

Average Hourly Temperature in July in Adamstown18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AMJunAugcomfortable
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.

Playas, Ecuador (3,652 miles away) and Vila da Ribeira Brava, Cape Verde (7,674 miles) are the far-away foreign places with temperatures most similar to Adamstown (view comparison).

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© Esri, et al.

Compare Adamstown to another city:

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The month of July in Adamstown experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 53% throughout the month.

The clearest day of the month is July 29, with clear, mostly clear, or partly cloudy conditions 49% of the time.

For reference, on December 1, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 71%, while on August 26, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 53%.

Cloud Cover Categories in July in Adamstown

Cloud Cover Categories in July in Adamstown1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JunAugJul 146%Jul 146%Jul 3149%Jul 3149%Jul 1147%Jul 1147%Jul 2148%Jul 2148%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 Adamstown, the chance of a wet day over the course of July is gradually increasing, starting the month at 25% and ending it at 28%.

For reference, the year's highest daily chance of a wet day is 35% on December 12, and its lowest chance is 24% on February 25.

Probability of Precipitation in July in Adamstown

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 July in Adamstown is essentially constant, remaining about 3.5 inches throughout, and rarely exceeding 7.4 inches or falling below 1.0 inches.

The lowest average 31-day accumulation is 3.4 inches on July 14.

Average Monthly Rainfall in July in Adamstown

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 July in Adamstown, the length of the day is gradually increasing. From the start to the end of the month, the length of the day increases by 21 minutes, implying an average daily increase of 43 seconds, and weekly increase of 4 minutes, 58 seconds.

The shortest day of the month is July 1, with 10 hours, 36 minutes of daylight and the longest day is July 31, with 10 hours, 58 minutes of daylight.

Hours of Daylight and Twilight in July in Adamstown

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 Adamstown is 7:26 AM on July 2 and the earliest sunrise is 8 minutes earlier at 7:18 AM on July 31.

The earliest sunset is 6:02 PM on July 1 and the latest sunset is 13 minutes later at 6:15 PM on July 31.

Daylight saving time is not observed in Adamstown during 2021.

For reference, on December 21, the longest day of the year, the Sun rises at 5:47 AM and sets 13 hours, 42 minutes later, at 7:29 PM, while on June 21, the shortest day of the year, it rises at 7:24 AM and sets 10 hours, 35 minutes later, at 5:59 PM.

Sunrise & Sunset with Twilight in July in Adamstown

The solar day over the course of July. 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 key lunar data for July 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 July in Adamstown

Moon Rise, Set & Phases in July in Adamstown18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMJunAugJun 102:53 AMJun 102:53 AMJun 2410:40 AMJun 2410:40 AMJul 95:17 PMJul 95:17 PMJul 236:38 PMJul 236:38 PMAug 85:51 AMAug 85:51 AMAug 224:03 AMAug 224:03 AM7:37 AM7:37 AM6:20 PM6:20 PM5:09 PM5:09 PM7:25 AM7:25 AM7:18 AM7:18 AM5:57 PM5:57 PM6:01 PM6:01 PM8:06 AM8:06 AM7:35 AM7:35 AM6:42 PM6:42 PM5:54 PM5:54 PM7:27 AM7:27 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.
Jul 2021IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
50%12:17 AME12:44 PMW-6:31 AMN246,221 mi
2
43%1:09 AME1:15 PMW-7:12 AMN248,758 mi
3
33%2:00 AME1:46 PMW-7:53 AMN250,556 mi
4
24%2:51 AMENE2:18 PMWNW-8:35 AMN251,582 mi
5
17%3:43 AMENE2:54 PMWNW-9:18 AMN251,863 mi
6
10%4:37 AMENE3:33 PMWNW-10:04 AMN251,473 mi
7
5%5:31 AMENE4:16 PMWNW-10:53 AMN250,515 mi
8
1%6:25 AMENE5:05 PMWNW-11:45 AMN249,106 mi
9
0%7:18 AMENE5:57 PMWNW-12:38 PMN247,364 mi
10
1%8:08 AMENE6:54 PMWNW-1:31 PMN245,393 mi
11
4%8:55 AMENE7:51 PMWNW-2:23 PMN243,274 mi
12
9%9:37 AMENE8:50 PMWNW-3:14 PMN241,065 mi
13
16%10:16 AMENE9:48 PMWNW-4:02 PMN238,801 mi
14
25%10:53 AME10:47 PMW-4:49 PMN236,510 mi
15
35%11:28 AME11:45 PMW-5:36 PMN234,230 mi
16
46%12:04 PME--6:23 PMN232,022 mi
17
50%-12:45 AMW12:40 PME7:11 PMN229,990 mi
18
70%-1:46 AMWSW1:20 PMESE8:03 PMN228,277 mi
19
80%-2:51 AMWSW2:05 PMESE8:59 PMN227,058 mi
20
89%-3:58 AMWSW2:55 PMESE9:59 PMN226,514 mi
21
96%-5:06 AMWSW3:52 PMESE11:02 PMS226,796 mi
22
98%-6:12 AMWSW4:55 PMESE--
23
100%-7:12 AMWSW6:01 PMESE12:05 AMS227,975 mi
24
100%-8:06 AMWSW7:07 PMESE1:06 AMN230,018 mi
25
98%-8:53 AMWSW8:10 PMESE2:02 AMN232,779 mi
26
93%-9:33 AMWSW9:09 PMESE2:54 AMN236,028 mi
27
86%-10:09 AMW10:06 PME3:41 AMN239,485 mi
28
78%-10:42 AMW10:59 PME4:25 AMN242,864 mi
29
69%-11:14 AMW11:52 PME5:07 AMN245,902 mi
30
59%-11:45 AMW-5:49 AMN248,382 mi
31
50%12:44 AMENE12:17 PMWNW-6:31 AMN250,149 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 Adamstown is rapidly decreasing during July, falling from 44% to 33% over the course of the month.

For reference, on February 27, the muggiest day of the year, there are muggy conditions 99% of the time, while on August 22, the least muggy day of the year, there are muggy conditions 30% of the time.

Humidity Comfort Levels in July in Adamstown

Humidity Comfort Levels in July in Adamstown1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%JunAugJul 144%Jul 144%Jul 3133%Jul 3133%Jul 1140%Jul 1140%Jul 2136%Jul 2136%oppressiveoppressivemuggymuggyhumidhumidcomfortablecomfortabledrydry
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 Adamstown is essentially constant during July, remaining within 0.2 miles per hour of 15.3 miles per hour throughout.

For reference, on July 31, the windiest day of the year, the daily average wind speed is 15.5 miles per hour, while on February 26, the calmest day of the year, the daily average wind speed is 12.2 miles per hour.

The highest daily average wind speed during July is 15.5 miles per hour on July 31.

Average Wind Speed in July in Adamstown

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 Adamstown throughout July is predominantly from the east, with a peak proportion of 31% on July 25.

Wind Direction in July in Adamstown

Wind Direction in July in AdamstownENE1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%20%80%40%60%60%40%80%20%100%0%JunAugwestsoutheastnorth
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).

Adamstown 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 Adamstown is essentially constant during July, remaining within 1°F of 73°F throughout.

Average Water Temperature in July in Adamstown

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 Adamstown 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 July in Adamstown

Time Spent in Various Temperature Bands and the Growing Season in July in Adamstown1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JunAug100%Jul 16100%Jul 16100%Jul 3100%Jul 3comfortablewarmcool
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 Adamstown are rapidly increasing during July, increasing by 605°F, from 1°F to 606°F, over the course of the month.

Growing Degree Days in July in Adamstown

The average growing degree days accumulated over the course of July, 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 Adamstown is essentially constant during July, remaining within 0.2 kWh of 3.3 kWh throughout.

Average Daily Incident Shortwave Solar Energy in July in Adamstown

Average Daily Incident Shortwave Solar Energy in July in Adamstown1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310.0 kWh0.0 kWh0.5 kWh0.5 kWh1.0 kWh1.0 kWh1.5 kWh1.5 kWh2.0 kWh2.0 kWh2.5 kWh2.5 kWh3.0 kWh3.0 kWh3.5 kWh3.5 kWh4.0 kWh4.0 kWh4.5 kWh4.5 kWh5.0 kWh5.0 kWh5.5 kWh5.5 kWh6.0 kWh6.0 kWhJunAugJul 13.1 kWhJul 13.1 kWhJul 313.6 kWhJul 313.6 kWhJul 113.2 kWhJul 113.2 kWhJul 213.4 kWhJul 213.4 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 Adamstown are -25.066 deg latitude, -130.101 deg longitude, and 220 ft elevation.

The topography within 2 miles of Adamstown contains very significant variations in elevation, with a maximum elevation change of 1,047 feet and an average elevation above sea level of 64 feet. Within 10 miles also contains very significant variations in elevation (1,047 feet). Within 50 miles also contains very significant variations in elevation (1,047 feet).

The area within 2 miles of Adamstown 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 Adamstown, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Adamstown is further than 200 kilometers from the nearest reliable weather station, so the weather-related data on this page were taken entirely from NASA's MERRA-2 satellite-era reanalysis . 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 temperature and dew point estimates are corrected for the difference between the reference elevation of the MERRA-2 grid cell and the elevation of Adamstown, according to the International Standard Atmosphere .

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.

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.

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