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June Weather in Alajuela Costa Rica

Daily high temperatures are around 80°F, rarely falling below 77°F or exceeding 84°F.

Daily low temperatures are around 67°F, rarely falling below 64°F or exceeding 69°F. The lowest daily average low temperature is 66°F on June 10.

For reference, on April 7, the hottest day of the year, temperatures in Alajuela typically range from 67°F to 85°F, while on October 1, the coldest day of the year, they range from 65°F to 79°F.

Average High and Low Temperature in June in Alajuela

Average High and Low Temperature in June in AlajuelaJun11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303064°F64°F66°F66°F68°F68°F70°F70°F72°F72°F74°F74°F76°F76°F78°F78°F80°F80°F82°F82°F84°F84°F86°F86°F88°F88°FMayJulJun 181°FJun 181°F67°F67°FJun 3080°FJun 3080°F67°F67°FJun 1180°FJun 1180°F66°F66°FJun 2180°FJun 2180°F67°F67°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 June. 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 June in Alajuela

Average Hourly Temperature in June in AlajuelaJun11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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 AMMayJulcomfortablecomfortablewarm
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.

La Roxas, Philippines (10,095 miles away) is the far-away foreign place with temperatures most similar to Alajuela (view comparison).

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The month of June in Alajuela experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 94% throughout the month. The highest chance of overcast or mostly cloudy conditions is 95% on June 4.

The clearest day of the month is June 24, with clear, mostly clear, or partly cloudy conditions 7% of the time.

For reference, on June 4, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 95%, while on January 1, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 64%.

Cloud Cover Categories in June in Alajuela

Cloud Cover Categories in June in AlajuelaJun1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%MayJulJan 164%Jan 164%Jun 15%Jun 15%Jun 307%Jun 307%Jun 115%Jun 115%Jun 217%Jun 217%partly cloudymostly cloudyovercastclear
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 Alajuela, the chance of a wet day over the course of June is essentially constant, remaining around 42% throughout.

For reference, the year's highest daily chance of a wet day is 51% on October 6, and its lowest chance is 5% on March 15.

Probability of Precipitation in June in Alajuela

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 June in Alajuela is decreasing, starting the month at 5.5 inches, when it rarely exceeds 9.5 inches or falls below 2.0 inches, and ending the month at 4.6 inches, when it rarely exceeds 8.0 inches or falls below 1.6 inches.

The highest average 31-day accumulation is 5.5 inches on June 3.

Average Monthly Rainfall in June in Alajuela

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 June in Alajuela, the length of the day is essentially constant. The shortest day of the month is June 1, with 12 hours, 40 minutes of daylight and the longest day is June 19, with 12 hours, 43 minutes of daylight.

Hours of Daylight and Twilight in June in Alajuela

Hours of Daylight and Twilight in June in AlajuelaJun1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrMayJulJun 2012 hr, 43 minJun 2012 hr, 43 minnightnightdaydayJun 112 hr, 40 minJun 112 hr, 40 min
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 of the month in Alajuela is 5:14 AM on June 1 and the latest sunrise is 5 minutes later at 5:19 AM on June 30.

The earliest sunset is 5:55 PM on June 1 and the latest sunset is 7 minutes later at 6:01 PM on June 30.

Daylight saving time is not observed in Alajuela during 2024.

For reference, on June 20, the longest day of the year, the Sun rises at 5:17 AM and sets 12 hours, 43 minutes later, at 5:59 PM, while on December 21, the shortest day of the year, it rises at 5:49 AM and sets 11 hours, 33 minutes later, at 5:21 PM.

Sunrise & Sunset with Twilight in June in Alajuela

Sunrise & Sunset with Twilight in June in AlajuelaJun11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PMMayJul5:14 AM5:14 AMJun 15:55 PMJun 15:55 PM5:19 AM5:19 AMJun 306:01 PMJun 306:01 PM5:15 AM5:15 AMJun 115:57 PMJun 115:57 PMSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of June. 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 June in Alajuela

Solar Elevation and Azimuth in June in AlajuelaJun11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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 AMMayJul001010202020303040405050506060707080800001010202030303040405050606060707080
northeastsouthwest
Solar elevation and azimuth over the course of June 2024. 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 June 2024. 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 June in Alajuela

Moon Rise, Set & Phases in June in AlajuelaJun11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMMayJulMay 79:23 PMMay 79:23 PMMay 237:54 AMMay 237:54 AMJun 66:38 AMJun 66:38 AMJun 217:09 PMJun 217:09 PMJul 54:58 PMJul 54:58 PMJul 214:18 AMJul 214:18 AM4:41 AM4:41 AM5:35 PM5:35 PM5:16 PM5:16 PM5:06 AM5:06 AM5:09 AM5:09 AM6:23 PM6:23 PM5:58 PM5:58 PM5:42 AM5:42 AM4:54 AM4:54 AM6:07 PM6:07 PM5:42 PM5:42 PM5:31 AM5:31 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.
Jun 2024IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
30%1:05 AME1:31 PMW-7:17 AMS228,866 mi
2
19%1:48 AME2:25 PMW-8:05 AMS228,749 mi
3
11%2:33 AMENE3:21 PMWNW-8:55 AMN229,200 mi
4
4%3:21 AMENE4:20 PMWNW-9:49 AMN230,290 mi
5
1%4:13 AMENE5:21 PMWNW-10:45 AMN232,038 mi
6
0%5:09 AMENE6:23 PMWNW-11:45 AMN234,384 mi
7
2%6:08 AMENE7:23 PMWNW-12:45 PMN237,186 mi
8
6%7:07 AMENE8:18 PMWNW-1:44 PMN240,233 mi
9
12%8:04 AMENE9:09 PMWNW-2:38 PMN243,278 mi
10
20%8:58 AMENE9:54 PMWNW-3:28 PMN246,071 mi
11
29%9:48 AMENE10:35 PMWNW-4:13 PMN248,390 mi
12
38%10:35 AMENE11:12 PMW-4:55 PMN250,055 mi
13
50%11:20 AME11:47 PMW-5:34 PMS250,947 mi
14
57%12:03 PME--6:13 PMS251,005 mi
15
67%-12:22 AMW12:46 PME6:52 PMS250,239 mi
16
76%-12:57 AMW1:30 PME7:32 PMS248,720 mi
17
84%-1:34 AMWSW2:17 PMESE8:15 PMS246,578 mi
18
91%-2:14 AMWSW3:07 PMESE9:02 PMS243,988 mi
19
96%-2:58 AMWSW4:01 PMESE9:53 PMS241,160 mi
20
99%-3:48 AMWSW4:58 PMESE10:50 PMS238,316 mi
21
100%-4:43 AMWSW5:58 PMESE11:50 PMS235,672 mi
22
99%-5:42 AMWSW6:57 PMESE--
23
98%-6:44 AMWSW7:54 PMESE12:51 AMS233,406 mi
24
94%-7:45 AMWSW8:47 PMESE1:51 AMS231,634 mi
25
87%-8:44 AMWSW9:36 PMESE2:47 AMS230,403 mi
26
78%-9:41 AMWSW10:21 PME3:39 AMS229,698 mi
27
67%-10:35 AMW11:04 PME4:28 AMS229,466 mi
28
50%-11:28 AMW11:47 PME5:16 AMS229,642 mi
29
43%-12:21 PMW-6:03 AMS230,172 mi
30
32%12:30 AMENE1:15 PMWNW-6:51 AMN231,023 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 Alajuela is rapidly decreasing during June, falling from 69% to 55% over the course of the month.

The highest chance of a muggy day during June is 69% on June 3.

For reference, on June 2, the muggiest day of the year, there are muggy conditions 69% of the time, while on January 24, the least muggy day of the year, there are muggy conditions 4% of the time.

Humidity Comfort Levels in June in Alajuela

Humidity Comfort Levels in June in AlajuelaJun1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%MayJulJun 369%Jun 369%Jun 3055%Jun 3055%Jun 1167%Jun 1167%Jun 2161%Jun 2161%oppressiveoppressivemuggymuggyhumidhumidcomfortablecomfortable
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 Alajuela is essentially constant during June, remaining within 0.1 miles per hour of 2.2 miles per hour throughout.

For reference, on February 5, the windiest day of the year, the daily average wind speed is 4.2 miles per hour, while on September 12, the calmest day of the year, the daily average wind speed is 2.0 miles per hour.

The lowest daily average wind speed during June is 2.1 miles per hour on June 7.

Average Wind Speed in June in Alajuela

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 Alajuela throughout June is predominantly from the east, with a peak proportion of 55% on June 30.

Wind Direction in June in Alajuela

Wind Direction in June in AlajuelaJun1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%20%80%40%60%60%40%80%20%100%0%MayJulwesteastnorthsouth
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).

Alajuela 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 Alajuela is essentially constant during June, remaining around 84°F throughout.

Average Water Temperature in June in Alajuela

Average Water Temperature in June in AlajuelaJun11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303082.0°F82.0°F82.5°F82.5°F83.0°F83.0°F83.5°F83.5°F84.0°F84.0°F84.5°F84.5°F85.0°F85.0°F85.5°F85.5°FMayJulJun 184°FJun 184°FJun 3084°FJun 3084°FJun 1184°FJun 1184°FJun 2184°FJun 2184°F
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 Alajuela 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 June in Alajuela

Time Spent in Various Temperature Bands and the Growing Season in June in AlajuelaJun1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%MayJul100%Jun 16100%Jun 16100%Jul 2100%Jul 2comfortablewarmhotcool
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 Alajuela are rapidly increasing during June, increasing by 637°F, from 3,474°F to 4,111°F, over the course of the month.

Growing Degree Days in June in Alajuela

Growing Degree Days in June in AlajuelaJun1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930303,400°F3,400°F3,500°F3,500°F3,600°F3,600°F3,700°F3,700°F3,800°F3,800°F3,900°F3,900°F4,000°F4,000°F4,100°F4,100°F4,200°F4,200°FMayJulJun 13,474°FJun 13,474°FJun 304,111°FJun 304,111°FJun 113,694°FJun 113,694°FJun 213,913°FJun 213,913°F
The average growing degree days accumulated over the course of June, 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 Alajuela is essentially constant during June, remaining within 0.1 kWh of 3.9 kWh throughout.

The lowest average daily incident shortwave solar energy during June is 3.8 kWh on June 14.

Average Daily Incident Shortwave Solar Energy in June in Alajuela

Average Daily Incident Shortwave Solar Energy in June in AlajuelaJun1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWhMayJulJun 143.8 kWhJun 143.8 kWhJun 14.0 kWhJun 14.0 kWhJun 303.9 kWhJun 303.9 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 Alajuela are 10.016 deg latitude, -84.212 deg longitude, and 3,130 ft elevation.

The topography within 2 miles of Alajuela contains significant variations in elevation, with a maximum elevation change of 610 feet and an average elevation above sea level of 3,104 feet. Within 10 miles contains significant variations in elevation (7,477 feet). Within 50 miles also contains extreme variations in elevation (11,447 feet).

The area within 2 miles of Alajuela is covered by grassland (64%) and trees (22%), within 10 miles by grassland (47%) and trees (35%), and within 50 miles by trees (51%) and grassland (17%).

This report illustrates the typical weather in Alajuela, 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 is only a single weather station, Juan Santamaría International Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Alajuela.

At a distance of 2 kilometers from Alajuela, closer than our threshold of 150 kilometers, this station is deemed sufficiently nearby to be relied upon as our primary source for temperature and dew point records.

The station records are corrected for the elevation difference between the station and Alajuela according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

Please note that the station records themselves may additionally have been back-filled using other nearby stations or the MERRA-2 reanalysis.

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 © 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.

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