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Climate and Average Weather Year Round in Costa Rica Brazil

In Costa Rica, the summers are long, hot, muggy, and partly cloudy; the winters are short, cool, and mostly clear; and it is wet year round. Over the course of the year, the temperature typically varies from 52°F to 88°F and is rarely below 42°F or above 95°F.

Based on the tourism score, the best time of year to visit Costa Rica for warm-weather activities is from mid April to late September.

Climate in Costa Rica

hotwarmcomfortablewarmhotJanFebMarAprMayJunJulAugSepOctNovDecNowNow70%70%42%42%clearovercastprecipitation: 6.4 inprecipitation: 6.4 in1.9 in1.9 inmuggy: 89%muggy: 89%6%6%tourism score: 6.6tourism score: 6.64.04.0
Costa Rica weather by month. Click on each chart for more information.

The hot season lasts for 5.6 months, from October 15 to April 3, with an average daily high temperature above 85°F. The hottest month of the year in Costa Rica is January, with an average high of 88°F and low of 70°F.

The cool season lasts for 2.6 months, from May 16 to August 4, with an average daily high temperature below 77°F. The coldest month of the year in Costa Rica is July, with an average low of 53°F and high of 75°F.

Average High and Low Temperature in Costa Rica

Average High and Low Temperature in Costa RicahothotcoolJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FJul 2275°FJul 2275°FJan 2088°FJan 2088°F52°F52°F70°F70°FOct 1585°FOct 1585°FApr 385°FApr 385°FMay 1677°FMay 1677°F64°F64°F66°F66°F57°F57°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.
AverageJanFebMarAprMayJunJulAugSepOctNovDec
High 88°F87°F87°F83°F77°F74°F75°F79°F83°F85°F87°F88°F
Temp. 79°F78°F77°F73°F66°F63°F62°F66°F69°F74°F76°F78°F
Low 70°F70°F68°F64°F57°F54°F53°F55°F59°F64°F67°F69°F

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 Costa Rica

Average Hourly Temperature in Costa RicaJanFebMarAprMayJunJulAugSepOctNovDec12 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 AMNowNowcoldcoolcoolcomfortablewarmwarmhothot
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.

Giyani, South Africa (5,325 miles away); Ta‘izz, Yemen (7,136 miles); and Rockhampton, Australia (8,799 miles) are the far-away foreign places with temperatures most similar to Costa Rica (view comparison).

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In Costa Rica, 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 in Costa Rica begins around March 12 and lasts for 7.0 months, ending around October 10.

The clearest month of the year in Costa Rica is August, during which on average the sky is clear, mostly clear, or partly cloudy 68% of the time.

The cloudier part of the year begins around October 10 and lasts for 5.0 months, ending around March 12.

The cloudiest month of the year in Costa Rica is January, during which on average the sky is overcast or mostly cloudy 56% of the time.

Cloud Cover Categories in Costa Rica

Cloud Cover Categories in Costa RicaclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Aug 2670%Aug 2670%Feb 942%Feb 942%Mar 1256%Mar 1256%Oct 1056%Oct 1056%NowNowclearmostly clearmostly cloudyovercastpartly cloudy
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.
FractionJanFebMarAprMayJunJulAugSepOctNovDec
Cloudier 56%55%42%36%34%36%34%32%35%44%47%52%
Clearer 44%45%58%64%66%64%66%68%65%56%53%48%

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

The wetter season lasts 5.8 months, from October 1 to March 26, with a greater than 37% chance of a given day being a wet day. The month with the most wet days in Costa Rica is February, with an average of 15.2 days with at least 0.04 inches of precipitation.

The drier season lasts 6.2 months, from March 26 to October 1. The month with the fewest wet days in Costa Rica is August, with an average of 6.2 days with at least 0.04 inches of precipitation.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. The month with the most days of rain alone in Costa Rica is February, with an average of 15.2 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 57% on February 9.

Daily Chance of Precipitation in Costa Rica

Daily Chance of Precipitation in Costa RicawetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Feb 957%Feb 957%Jul 2718%Jul 2718%Jan 152%Jan 152%Oct 137%Oct 137%Mar 2637%Mar 2637%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).
Days ofJanFebMarAprMayJunJulAugSepOctNovDec
Rain 16.7d15.2d12.9d10.2d10.0d7.8d6.3d6.2d8.8d13.6d12.9d15.4d

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. Costa Rica experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year in Costa Rica. The month with the most rain in Costa Rica is October, with an average rainfall of 6.3 inches.

The month with the least rain in Costa Rica is July, with an average rainfall of 2.2 inches.

Average Monthly Rainfall in Costa Rica

Average Monthly Rainfall in Costa RicaJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in2 in2 in4 in4 in6 in6 in8 in8 in10 in10 in12 in12 inOct 236.4 inOct 236.4 inJul 281.9 inJul 281.9 inFeb 15.5 inFeb 15.5 inMay 95.1 inMay 95.1 inMar 244.2 inMar 244.2 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 snowfall.
JanFebMarAprMayJunJulAugSepOctNovDec
Rainfall 5.4″5.3″4.3″4.6″5.0″3.4″2.2″2.4″4.1″6.3″6.2″6.0″

The length of the day in Costa Rica varies over the course of the year. In 2023, the shortest day is June 21, with 10 hours, 42 minutes of daylight; the longest day is December 21, with 13 hours, 35 minutes of daylight.

Hours of Daylight and Twilight in Costa Rica

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.
Hours ofJanFebMarAprMayJunJulAugSepOctNovDec
Daylight 13.4h12.9h12.2h11.5h11.0h10.7h10.9h11.3h12.0h12.7h13.3h13.6h

The earliest sunrise is at 4:43 AM on November 29, and the latest sunrise is 1 hour, 38 minutes later at 6:21 AM on July 4. The earliest sunset is at 4:59 PM on June 7, and the latest sunset is 1 hour, 31 minutes later at 6:30 PM on January 14.

Daylight saving time (DST) is not observed in Costa Rica during 2023.

Sunrise & Sunset with Twilight in Costa Rica

Sunrise & Sunset with Twilight in Costa RicaJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PMNov 294:43 AMNov 294:43 AM6:30 PMJan 146:30 PMJan 14Jun 74:59 PMJun 74:59 PM6:21 AMJul 46:21 AMJul 4daynightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of the year 2023. 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 Costa Rica

Solar Elevation and Azimuth in Costa RicaJanFebMarAprMayJunJulAugSepOctNovDec12 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 AM00001010101020202020303030304040404050505060607070800000101010102020202030303030404040405050506060607070804390NowNow
northeastsouthwest
Solar elevation and azimuth over the course of the year 2023. 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 2023. 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 Costa Rica

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.

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.

Costa Rica experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 7.8 months, from September 22 to May 16, during which time the comfort level is muggy, oppressive, or miserable at least 27% of the time. The month with the most muggy days in Costa Rica is January, with 27.2 days that are muggy or worse.

The month with the fewest muggy days in Costa Rica is July, with 2.5 days that are muggy or worse.

Humidity Comfort Levels in Costa Rica

Humidity Comfort Levels in Costa RicamuggymuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jul 286%Jul 286%89%Jan 2489%Jan 24Sep 2227%Sep 2227%May 1627%May 1627%NowNowoppressiveoppressivemuggymuggyhumidhumidcomfortablecomfortabledrydrymiserablemiserable
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.
JanFebMarAprMayJunJulAugSepOctNovDec
Muggy days 27.2d24.6d24.7d17.1d8.6d4.0d2.5d2.8d6.8d16.4d20.0d24.9d

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 Costa Rica experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 5.4 months, from May 30 to November 12, with average wind speeds of more than 6.2 miles per hour. The windiest month of the year in Costa Rica is September, with an average hourly wind speed of 7.2 miles per hour.

The calmer time of year lasts for 6.5 months, from November 12 to May 30. The calmest month of the year in Costa Rica is March, with an average hourly wind speed of 5.2 miles per hour.

Average Wind Speed in Costa Rica

Average Wind Speed in Costa RicawindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph1 mph1 mph2 mph2 mph3 mph3 mph4 mph4 mph5 mph5 mph6 mph6 mph7 mph7 mph8 mph8 mph9 mph9 mph10 mph10 mph11 mph11 mphSep 97.3 mphSep 97.3 mphMar 25.1 mphMar 25.1 mphMay 306.2 mphMay 306.2 mphNov 126.2 mphNov 126.2 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
JanFebMarAprMayJunJulAugSepOctNovDec
Wind Speed (mph) 5.45.35.25.66.06.46.97.17.26.66.15.6

The predominant average hourly wind direction in Costa Rica varies throughout the year.

The wind is most often from the east for 3.5 months, from March 3 to June 17 and for 4.8 months, from July 9 to December 4, with a peak percentage of 42% on March 29. The wind is most often from the north for 3.1 weeks, from June 17 to July 9 and for 3.0 months, from December 4 to March 3, with a peak percentage of 37% on June 24.

Wind Direction in Costa Rica

Wind Direction in Costa RicaNENENJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowsoutheastnorthwest
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).

To characterize how pleasant the weather is in Costa Rica 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 Costa Rica for general outdoor tourist activities is from mid April to late September, with a peak score in the second week of May.

Tourism Score in Costa Rica

Tourism Score in Costa Ricabest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.66.64.04.06.46.4NowNowprecipitationprecipitationcloudscloudstemperaturetemperature 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 times of year to visit Costa Rica for hot-weather activities are from mid February to late April and from early November to early January, with a peak score in the last week of March.

Beach/Pool Score in Costa Rica

Beach/Pool Score in Costa Ricabest timebest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.36.33.13.15.95.9NowNowprecipitationprecipitationcloudsclouds 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.

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 Costa Rica 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 Costa Rica

Time Spent in Various Temperature Bands and the Growing Season in Costa RicaJanFebMarAprMayJunJulAugSepOctNovDec0%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 190%Jul 1490%Jul 14NowNowcoldcoolcomfortablewarmhotvery cold
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 in Costa Rica

Growing Degree Days in Costa RicaJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F1,000°F1,000°F2,000°F2,000°F3,000°F3,000°F4,000°F4,000°F5,000°F5,000°F6,000°F6,000°F7,000°F7,000°F8,000°F8,000°FJul 890°FJul 890°FSep 2900°FSep 2900°FOct 161,800°FOct 161,800°FJun 307,812°FJun 307,812°FNowNow
The average growing degree days accumulated over the course of the year, 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 experiences significant seasonal variation over the course of the year.

The brighter period of the year lasts for 3.6 months, from October 22 to February 11, with an average daily incident shortwave energy per square meter above 6.3 kWh. The brightest month of the year in Costa Rica is December, with an average of 6.9 kWh.

The darker period of the year lasts for 2.7 months, from May 13 to August 2, with an average daily incident shortwave energy per square meter below 4.4 kWh. The darkest month of the year in Costa Rica is June, with an average of 3.8 kWh.

Average Daily Incident Shortwave Solar Energy in Costa Rica

Average Daily Incident Shortwave Solar Energy in Costa RicabrightbrightdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhDec 27.0 kWhDec 27.0 kWhJun 253.8 kWhJun 253.8 kWhFeb 116.3 kWhFeb 116.3 kWhMay 134.4 kWhMay 134.4 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.
JanFebMarAprMayJunJulAugSepOctNovDec
Solar Energy (kWh) 6.86.36.15.24.33.84.14.85.56.26.96.9

For the purposes of this report, the geographical coordinates of Costa Rica are -23.417 deg latitude, -54.650 deg longitude, and 1,293 ft elevation.

The topography within 2 miles of Costa Rica contains only modest variations in elevation, with a maximum elevation change of 358 feet and an average elevation above sea level of 1,292 feet. Within 10 miles contains only modest variations in elevation (614 feet). Within 50 miles contains significant variations in elevation (1,270 feet).

The area within 2 miles of Costa Rica is covered by cropland (75%) and trees (14%), within 10 miles by cropland (51%) and trees (25%), and within 50 miles by cropland (49%) and trees (22%).

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

Costa Rica 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 Costa Rica, 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 © OpenStreetMap contributors.

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.

Please review our full terms contained on our Terms of Service page.