Climate and Average Weather Year Round in Fort Wellington Guyana
The climate in Fort Wellington is warm, oppressive, windy, and mostly cloudy. Over the course of the year, the temperature typically varies from 76°F to 87°F and is rarely below 74°F or above 89°F.
Based on the beach/pool score, the best times of year to visit Fort Wellington for hot-weather activities are from late July to late November and from late December to late April.
Climate in Fort Wellington
Average Temperature in Fort Wellington
The temperature in Fort Wellington varies so little throughout the year that it is not entirely meaningful to discuss hot and cold seasons.
Average High and Low Temperature in Fort Wellington
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 in Fort Wellington
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
Anse Boileau, Seychelles (7,845 miles away); Lazi, Philippines (11,374 miles); and Sola, Vanuatu (9,338 miles) are the far-away foreign places with temperatures most similar to Fort Wellington (view comparison).
In Fort Wellington, the average percentage of the sky covered by clouds experiences mild seasonal variation over the course of the year.
The clearer part of the year in Fort Wellington begins around June 23 and lasts for 3.4 months, ending around October 3. On August 16, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 47% of the time, and overcast or mostly cloudy 53% of the time.
The cloudier part of the year begins around October 3 and lasts for 8.7 months, ending around June 23. On April 25, the cloudiest day of the year, the sky is overcast or mostly cloudy 73% of the time, and clear, mostly clear, or partly cloudy 27% of the time.
Cloud Cover Categories in Fort Wellington
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Fort Wellington varies very significantly throughout the year.
The wetter season lasts 3.6 months, from April 28 to August 17, with a greater than 51% chance of a given day being a wet day. The chance of a wet day peaks at 81% on June 14.
The drier season lasts 8.4 months, from August 17 to April 28. The smallest chance of a wet day is 22% on October 8.
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 81% on June 14.
Daily Chance of Precipitation in Fort Wellington
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. Fort Wellington experiences extreme seasonal variation in monthly rainfall.
Rain falls throughout the year in Fort Wellington. The most rain falls during the 31 days centered around June 8, with an average total accumulation of 9.6 inches.
The least rain falls around October 10, with an average total accumulation of 1.8 inches.
Average Monthly Rainfall in Fort Wellington
The length of the day in Fort Wellington does not vary substantially over the course of the year, staying within 29 minutes of 12 hours throughout. In 2021, the shortest day is December 21, with 11 hours, 45 minutes of daylight; the longest day is June 20, with 12 hours, 30 minutes of daylight.
Hours of Daylight and Twilight in Fort Wellington
The earliest sunrise is at 5:33 AM on May 24, and the latest sunrise is 34 minutes later at 6:08 AM on February 1. The earliest sunset is at 5:29 PM on November 11, and the latest sunset is 40 minutes later at 6:10 PM on July 16.
Daylight saving time (DST) is not observed in Fort Wellington during 2021.
Sunrise & Sunset with Twilight in Fort Wellington
The figure below presents a compact representation of key lunar data for 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.
Moon Rise, Set & Phases in Fort Wellington
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 perceived humidity level in Fort Wellington, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, remaining a virtually constant 100% throughout.
Humidity Comfort Levels in Fort Wellington
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 Fort Wellington experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 7.0 months, from October 31 to May 31, with average wind speeds of more than 9.7 miles per hour. The windiest day of the year is February 13, with an average hourly wind speed of 11.7 miles per hour.
The calmer time of year lasts for 5.0 months, from May 31 to October 31. The calmest day of the year is August 7, with an average hourly wind speed of 7.7 miles per hour.
Average Wind Speed in Fort Wellington
The predominant average hourly wind direction in Fort Wellington is from the east throughout the year.
Wind Direction in Fort Wellington
Fort Wellington 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 does not vary significantly over the course of the year, remaining within 2°F of 82°F throughout.
Average Water Temperature in Fort Wellington
Best Time of Year to Visit
To characterize how pleasant the weather is in Fort Wellington 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 Fort Wellington for general outdoor tourist activities is from early January to late March, with a peak score in the last week of February.
Tourism Score in Fort Wellington
The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best times of year to visit Fort Wellington for hot-weather activities are from late July to late November and from late December to late April, with a peak score in the last week of February.
Beach/Pool Score in Fort Wellington
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.
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 Fort Wellington 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 Fort Wellington
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
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 in Fort Wellington
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 some seasonal variation over the course of the year.
The brighter period of the year lasts for 2.3 months, from February 13 to April 21, with an average daily incident shortwave energy per square meter above 6.2 kWh. The brightest day of the year is March 27, with an average of 6.5 kWh.
The darker period of the year lasts for 1.7 months, from May 23 to July 14, with an average daily incident shortwave energy per square meter below 5.1 kWh. The darkest day of the year is June 14, with an average of 4.7 kWh.
Average Daily Incident Shortwave Solar Energy in Fort Wellington
For the purposes of this report, the geographical coordinates of Fort Wellington are 6.391 deg latitude, -57.604 deg longitude, and 7 ft elevation.
The topography within 2 miles of Fort Wellington is essentially flat, with a maximum elevation change of 46 feet and an average elevation above sea level of 10 feet. Within 10 miles is essentially flat (112 feet). Within 50 miles also contains only modest variations in elevation (354 feet).
The area within 2 miles of Fort Wellington is covered by water (28%), shrubs (26%), cropland (19%), and trees (14%), within 10 miles by water (50%) and cropland (17%), and within 50 miles by water (61%) and trees (21%).
This report illustrates the typical weather in Fort Wellington, 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 Fort Wellington.
For each station, the records are corrected for the elevation difference between that station and Fort Wellington 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 Fort Wellington is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Fort Wellington and a given station.
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 © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.
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.