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Average Weather in Half Way Tree Jamaica

The climate in Half Way Tree is hot, oppressive, windy, and partly cloudy. Over the course of the year, the temperature typically varies from 74°F to 89°F and is rarely below 71°F or above 92°F.

Climate Summary

warmhotJanFebMarAprMayJunJulAugSepOctNovDec81%81%20%20%overcastclearprecipitation: 3.3 inprecipitation: 3.3 in0.3 in0.3 inmuggy: 100%muggy: 100%79%79%beach/pool score: 8.5beach/pool score: 8.54.94.9
Click on each chart for more information.

Based on the beach/pool score, the best time of year to visit Half Way Tree for hot-weather activities is from mid December to mid April.

Temperature

The temperature in Half Way Tree varies so little throughout the year that it is not entirely meaningful to discuss hot and cold seasons.

Average High and Low Temperature

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 entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature

Average Hourly Temperature in Half Way TreeJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMwarmhotcomfortable
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.

Recife, Brazil (3,383 miles away) is the far-away foreign place with temperatures most similar to Half Way Tree (view comparison).

Clouds

In Half Way Tree, the average percentage of the sky covered by clouds experiences extreme seasonal variation over the course of the year.

The clearer part of the year in Half Way Tree begins around November 22 and lasts for 5.6 months, ending around May 8. On January 29, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 81% of the time, and overcast or mostly cloudy 19% of the time.

The cloudier part of the year begins around May 8 and lasts for 6.4 months, ending around November 22. On June 14, the cloudiest day of the year, the sky is overcast or mostly cloudy 80% of the time, and clear, mostly clear, or partly cloudy 20% of the time.

Cloud Cover Categories

Cloud Cover Categories in Half Way TreeclearerclearercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jan 2981%Jan 2981%Jun 1420%Jun 1420%Nov 2250%Nov 2250%May 851%May 851%clearpartly cloudymostly cloudyovercastmostly clear
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.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Half Way Tree varies throughout the year.

The wetter season lasts 6.3 months, from May 10 to November 21, with a greater than 13% chance of a given day being a wet day. The chance of a wet day peaks at 21% on October 7.

The drier season lasts 5.7 months, from November 21 to May 10. The smallest chance of a wet day is 4% on January 19.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 21% on October 7.

Daily Chance of Precipitation

Daily Chance of Precipitation in Half Way TreewetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Oct 721%Oct 721%Jan 194%Jan 194%Jan 15%Jan 15%May 1013%May 1013%Nov 2113%Nov 2113%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 months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Half Way Tree experiences significant seasonal variation in monthly rainfall.

The rainy period of the year lasts for 9.3 months, from March 30 to January 8, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around October 2, with an average total accumulation of 3.3 inches.

The rainless period of the year lasts for 2.7 months, from January 8 to March 30. The least rain falls around February 26, with an average total accumulation of 0.3 inches.

Average Monthly Rainfall

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

The length of the day in Half Way Tree varies over the course of the year. In 2017, the shortest day is December 21, with 11 hours, 3 minutes of daylight; the longest day is June 20, with 13 hours, 13 minutes of daylight.

Hours of Daylight and Twilight

Hours of Daylight and Twilight in Half Way TreeJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 6 minMar 2012 hr, 6 minMar 2013 hr, 13 minJun 2013 hr, 13 minJun 2012 hr, 7 minSep 2212 hr, 7 minSep 2211 hr, 3 minDec 2111 hr, 3 minDec 21nightnightday
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 is at 5:30 AM on June 4, and the latest sunrise is 1 hour, 11 minutes later at 6:41 AM on January 20. The earliest sunset is at 5:29 PM on November 24, and the latest sunset is 1 hour, 17 minutes later at 6:47 PM on July 6.

Daylight saving time (DST) is not observed in Half Way Tree during 2017.

Sunrise & Sunset with Twilight

Sunrise & Sunset with Twilight in Half Way TreeJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 45:30 AMJun 45:30 AM6:47 PMJul 66:47 PMJul 6Nov 245:29 PMNov 245:29 PM6:41 AMJan 206:41 AMJan 20daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of the year 2017. 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.

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.

Half Way Tree experiences some seasonal variation in the perceived humidity.

The muggier period of the year lasts for 9.7 months, from March 18 to January 9, during which time the comfort level is muggy, oppressive, or miserable at least 84% of the time. The muggiest day of the year is October 5, with muggy conditions 100% of the time.

The least muggy day of the year is February 12, with muggy conditions 79% of the time.

Humidity Comfort Levels

Humidity Comfort Levels in Half Way TreemuggyJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Feb 1279%Feb 1279%100%Oct 5100%Oct 5Mar 1884%Mar 1884%Jan 984%Jan 984%muggymuggymiserablemiserableoppressiveoppressivehumidhumid
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.

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 in Half Way Tree experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 3.1 months, from May 8 to August 13, with average wind speeds of more than 12.4 miles per hour. The windiest day of the year is June 24, with an average hourly wind speed of 14.8 miles per hour.

The calmer time of year lasts for 8.9 months, from August 13 to May 8. The calmest day of the year is October 4, with an average hourly wind speed of 9.9 miles per hour.

Average Wind Speed

Average Wind Speed in Half Way TreewindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph2 mph4 mph6 mph8 mph10 mph12 mph14 mph16 mph18 mphJun 2414.8 mphJun 2414.8 mphOct 49.9 mphOct 49.9 mphMay 812.4 mphMay 812.4 mphAug 1312.4 mphAug 1312.4 mph
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The predominant average hourly wind direction in Half Way Tree is from the east throughout the year.

Wind Direction

Wind Direction in Half Way TreeJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%eastnorthsouth
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).

Water Temperature

Half Way Tree 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 water temperature experiences some seasonal variation over the course of the year.

The time of year with warmer water lasts for 3.2 months, from July 30 to November 7, with an average temperature above 84°F. The day of the year with the warmest water is September 9, with an average temperature of 85°F.

The time of year with cooler water lasts for 3.1 months, from January 6 to April 9, with an average temperature below 81°F. The day of the year with the coolest water is February 19, with an average temperature of 80°F.

Average Water Temperature

The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Best Time of Year to Visit

To characterize how pleasant the weather is in Half Way Tree throughout the year, we compute two travel scores.

The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best time of year to visit Half Way Tree for general outdoor tourist activities is from late December to late March, with a peak score in the last week of January.

Tourism Score

Tourism Score in Half Way Treebest timeJanFebMarAprMayJunJulAugSepOctNovDec02468107.07.02.92.93.13.1 precipitationprecipitationcloudscloudstourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Half Way Tree for hot-weather activities is from mid December to mid April, with a peak score in the last week of January.

Beach/Pool Score

Beach/Pool Score in Half Way Treebest timeJanFebMarAprMayJunJulAugSepOctNovDec02468108.58.54.94.95.45.45.05.0 precipitationprecipitationcloudscloudstemperaturetemperaturebeach/pool score
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Methodology

For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.

Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.

Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.

Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.

Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.

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).

Temperatures in Half Way Tree 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

Time Spent in Various Temperature Bands and the Growing Season in Half Way TreeJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%100%Jan 1100%Jan 1100%Jul 3100%Jul 3warmhotcomfortable
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.

Growing Degree Days

Growing Degree Days in Half Way TreeJanFebMarAprMayJunJulAugSepOctNovDec0°F2,000°F4,000°F6,000°F8,000°F10,000°FJan 490°FJan 490°FMar 51,800°FMar 51,800°FDec 3111,297°FDec 3111,297°F
The average growing degree days accumulated over the course of the year, 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 experiences significant seasonal variation over the course of the year.

The brighter period of the year lasts for 2.1 months, from March 6 to May 8, with an average daily incident shortwave energy per square meter above 6.6 kWh. The brightest day of the year is April 12, with an average of 7.2 kWh.

The darker period of the year lasts for 5.4 months, from July 2 to December 16, with an average daily incident shortwave energy per square meter below 4.7 kWh. The darkest day of the year is September 29, with an average of 4.1 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy in Half Way TreebrightdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWhApr 127.2 kWhApr 127.2 kWhSep 294.1 kWhSep 294.1 kWhMar 66.6 kWhMar 66.6 kWhJul 24.7 kWhJul 24.7 kWhDec 164.7 kWhDec 164.7 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.

Topography

For the purposes of this report, the geographical coordinates of Half Way Tree are 18.012 deg latitude, -76.799 deg longitude, and 210 ft elevation.

The topography within 2 miles of Half Way Tree contains only modest variations in elevation, with a maximum elevation change of 417 feet and an average elevation above sea level of 238 feet. Within 10 miles contains only modest variations in elevation (5,043 feet). Within 50 miles also contains extreme variations in elevation (7,408 feet).

The area within 2 miles of Half Way Tree is covered by grassland (51%) and artificial surfaces (36%), within 10 miles by trees (30%) and water (26%), and within 50 miles by water (70%) and trees (16%).

Data Sources

This report illustrates the typical weather in Half Way Tree, 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 are 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Half Way Tree.

For each station, the records are corrected for the elevation difference between that station and Half Way Tree according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

The estimated value at Half Way Tree is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Half Way Tree and a given station.

The stations contributing to this reconstruction are: Norman Manley International Airport (98%, 9 kilometers, south) and Sangster International Airport (2.3%, 130 kilometers, northwest).

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , 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 aiports 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.