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Average Weather at Saint-Georges-de-l'Oyapock Airport French Guiana

At Saint-Georges-de-l'Oyapock Airport, the summers are short and hot; the winters are long, warm, and wet; and it is oppressive and mostly cloudy year round. Over the course of the year, the temperature typically varies from 71°F to 91°F and is rarely below 69°F or above 93°F.

Based on the beach/pool score, the best time of year to visit Saint-Georges-de-l'Oyapock Airport for hot-weather activities is from mid July to early October.

Climate Summary

warmhotJanFebMarAprMayJunJulAugSepOctNovDecNowNow57%57%24%24%overcastclearprecipitation: 19.1 inprecipitation: 19.1 in1.2 in1.2 inmuggy: 100%muggy: 100%100%100%beach/pool score: 6.2beach/pool score: 6.23.23.2
Click on each chart for more information.

Temperature

The hot season lasts for 2.6 months, from August 26 to November 13, with an average daily high temperature above 89°F. The hottest day of the year is October 7, with an average high of 91°F and low of 71°F.

The cool season lasts for 5.3 months, from December 20 to May 31, with an average daily high temperature below 85°F. The coldest day of the year is September 20, with an average low of 71°F and high of 90°F.

Average High and Low Temperature

Average High and Low Temperature at Saint-Georges-de-l'Oyapock AirporthotcoolJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FSep 2090°FSep 2090°F71°F71°FNov 1389°FNov 1389°FDec 2085°FDec 2085°FMay 3185°FMay 3185°F71°F71°F71°F71°F72°F72°F73°F73°FNowNow
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 at Saint-Georges-de-l'Oyapock AirportJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowcomfortablewarmhotcomfortablewarmcomfortable
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.

Franceville, Gabon (4,536 miles away); Ciamis, Indonesia (11,064 miles); and Bitung, Indonesia (12,026 miles) are the far-away foreign places with temperatures most similar to Saint-Georges-de-l'Oyapock Airport (view comparison).

Clouds

At Saint-Georges-de-l'Oyapock Airport, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.

The clearer part of the year at Saint-Georges-de-l'Oyapock Airport begins around June 17 and lasts for 3.9 months, ending around October 13. On August 12, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 57% of the time, and overcast or mostly cloudy 43% of the time.

The cloudier part of the year begins around October 13 and lasts for 8.1 months, ending around June 17. On May 3, the cloudiest day of the year, the sky is overcast or mostly cloudy 76% of the time, and clear, mostly clear, or partly cloudy 24% of the time.

Cloud Cover Categories

Cloud Cover Categories at Saint-Georges-de-l'Oyapock AirportclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Aug 1257%Aug 1257%May 324%May 324%Jun 1740%Jun 1740%Oct 1341%Oct 1341%NowNowclearmostly 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.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days at Saint-Georges-de-l'Oyapock Airport varies very significantly throughout the year.

The wetter season lasts 8.0 months, from December 1 to July 31, with a greater than 55% chance of a given day being a wet day. The chance of a wet day peaks at 91% on May 30.

The drier season lasts 4.0 months, from July 31 to December 1. The smallest chance of a wet day is 19% on September 24.

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 91% on May 30.

Daily Chance of Precipitation

Daily Chance of Precipitation at Saint-Georges-de-l'Oyapock AirportwetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%May 3091%May 3091%Sep 2419%Sep 2419%Jan 181%Jan 181%Dec 155%Dec 155%Jul 3155%Jul 3155%NowNowrain
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. Saint-Georges-de-l'Oyapock Airport experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year at Saint-Georges-de-l'Oyapock Airport. The most rain falls during the 31 days centered around May 10, with an average total accumulation of 19.1 inches.

The least rain falls around September 23, with an average total accumulation of 1.2 inches.

Average Monthly Rainfall

Average Monthly Rainfall at Saint-Georges-de-l'Oyapock AirportJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in5 in5 in10 in10 in15 in15 in20 in20 in25 in25 in30 in30 in35 in35 inMay 1019.1 inMay 1019.1 inSep 231.2 inSep 231.2 inJan 1514.0 inJan 1514.0 inMar 1412.7 inMar 1412.7 inNowNow
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 at Saint-Georges-de-l'Oyapock Airport does not vary substantially over the course of the year, staying within 20 minutes of 12 hours throughout. In 2021, the shortest day is December 21, with 11 hours, 54 minutes of daylight; the longest day is June 21, with 12 hours, 21 minutes of daylight.

Hours of Daylight and Twilight

Hours of Daylight and Twilight at Saint-Georges-de-l'Oyapock AirportJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 6 minMar 2012 hr, 6 minMar 2012 hr, 21 minJun 2112 hr, 21 minJun 2112 hr, 7 minSep 2212 hr, 7 minSep 2211 hr, 54 minDec 2111 hr, 54 minDec 21nightnightdayNowNow
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 6:11 AM on October 27, and the latest sunrise is 31 minutes later at 6:42 AM on February 5. The earliest sunset is at 6:09 PM on November 7, and the latest sunset is 33 minutes later at 6:43 PM on July 18.

Daylight saving time (DST) is not observed at Saint-Georges-de-l'Oyapock Airport during 2021.

Sunrise & Sunset with Twilight

Sunrise & Sunset with Twilight at Saint-Georges-de-l'Oyapock AirportJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMOct 276:11 AMOct 276:11 AM6:43 PMJul 186:43 PMJul 18Nov 76:09 PMNov 76:09 PM6:42 AMFeb 56:42 AMFeb 5daynightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of the year 2021. 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.

Moon

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

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.

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.

The perceived humidity level at Saint-Georges-de-l'Oyapock Airport, 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

Humidity Comfort Levels at Saint-Georges-de-l'Oyapock AirportJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Oct 29100%Oct 29100%100%Mar 28100%Mar 28NowNowmiserablemiserableoppressiveoppressive
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.

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 at Saint-Georges-de-l'Oyapock Airport experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 6.7 months, from October 12 to May 1, with average wind speeds of more than 3.0 miles per hour. The windiest day of the year is February 20, with an average hourly wind speed of 3.5 miles per hour.

The calmer time of year lasts for 5.3 months, from May 1 to October 12. The calmest day of the year is July 8, with an average hourly wind speed of 2.5 miles per hour.

Average Wind Speed

Average Wind Speed at Saint-Georges-de-l'Oyapock AirportwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0.0 mph0.0 mph0.5 mph0.5 mph1.0 mph1.0 mph1.5 mph1.5 mph2.0 mph2.0 mph2.5 mph2.5 mph3.0 mph3.0 mph3.5 mph3.5 mph4.0 mph4.0 mph4.5 mph4.5 mph5.0 mph5.0 mphFeb 203.5 mphFeb 203.5 mphJul 82.5 mphJul 82.5 mphOct 123.0 mphOct 123.0 mphMay 13.0 mphMay 13.0 mphNowNow
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 at Saint-Georges-de-l'Oyapock Airport is from the east throughout the year.

Wind Direction

Wind Direction at Saint-Georges-de-l'Oyapock AirportJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNoweastnorth
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).

Water Temperature

Saint-Georges-de-l'Oyapock 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 water temperature does not vary significantly over the course of the year, remaining within 2°F of 82°F throughout.

Average Water Temperature

Average Water Temperature at Saint-Georges-de-l'Oyapock AirportJanFebMarAprMayJunJulAugSepOctNovDec79°F79°F80°F80°F81°F81°F82°F82°F83°F83°F84°F84°F85°F85°FSep 2784°FSep 2784°F81°FJan 3181°FJan 31Jun 2783°FJun 2783°FNov 2083°FNov 2083°FJan 181°FJan 181°FMar 2581°FMar 2581°FNowNow
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 at Saint-Georges-de-l'Oyapock Airport 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 Saint-Georges-de-l'Oyapock Airport for general outdoor tourist activities is from early July to late September, with a peak score in the second week of August.

Tourism Score

Tourism Score at Saint-Georges-de-l'Oyapock Airportbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810104.24.22.32.3NowNowprecipitationprecipitationcloudscloudstemperaturetemperature tourism 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 Saint-Georges-de-l'Oyapock Airport for hot-weather activities is from mid July to early October, with a peak score in the third week of August.

Beach/Pool Score

Beach/Pool Score at Saint-Georges-de-l'Oyapock Airportbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.26.23.23.24.44.44.14.1NowNowprecipitationprecipitationcloudscloudstemperaturetemperature beach/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 at Saint-Georges-de-l'Oyapock 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

Time Spent in Various Temperature Bands and the Growing Season at Saint-Georges-de-l'Oyapock AirportJanFebMarAprMayJunJulAugSepOctNovDec0%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 3NowNowcomfortablewarmhot
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.

Growing Degree Days

Growing Degree Days at Saint-Georges-de-l'Oyapock AirportJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F2,000°F2,000°F4,000°F4,000°F6,000°F6,000°F8,000°F8,000°F10,000°F10,000°FJan 490°FJan 490°FMar 91,800°FMar 91,800°FDec 3110,174°FDec 3110,174°FNowNow
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 some seasonal variation over the course of the year.

The brighter period of the year lasts for 2.5 months, from August 14 to October 31, with an average daily incident shortwave energy per square meter above 6.3 kWh. The brightest day of the year is September 14, with an average of 6.7 kWh.

The darker period of the year lasts for 1.7 months, from April 30 to June 20, with an average daily incident shortwave energy per square meter below 5.0 kWh. The darkest day of the year is May 27, with an average of 4.6 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy at Saint-Georges-de-l'Oyapock AirportbrightdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhSep 146.7 kWhSep 146.7 kWhMay 274.6 kWhMay 274.6 kWhOct 316.3 kWhOct 316.3 kWhNowNow
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Data Sources

This report illustrates the typical weather at Saint-Georges-de-l'Oyapock 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

Saint-Georges-de-l'Oyapock 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.

In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations.

In this case, the only station close and reliable enough to use as a fallback is Cayenne-Rochambeau.

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 © 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.