Climate and Average Weather Year Round in Adi Keyh Eritrea

The climate in Adi Keyh is comfortable and partly cloudy. Over the course of the year, the temperature typically varies from 47°F to 77°F and is rarely below 43°F or above 82°F.

Based on the tourism score, the best times of year to visit Adi Keyh for warm-weather activities are from late January to late May and from mid October to late November.

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

In Adi Keyh, 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 Adi Keyh begins around October 2 and lasts for 7.7 months, ending around May 23.

The clearest month of the year in Adi Keyh is November, during which on average the sky is clear, mostly clear, or partly cloudy 78% of the time.

The cloudier part of the year begins around May 23 and lasts for 4.3 months, ending around October 2.

The cloudiest month of the year in Adi Keyh is July, during which on average the sky is overcast or mostly cloudy 82% of the time.

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

The wetter season lasts 2.0 months, from July 3 to September 4, with a greater than 25% chance of a given day being a wet day. The month with the most wet days in Adi Keyh is August, with an average of 13.4 days with at least 0.04 inches of precipitation.

The drier season lasts 10 months, from September 4 to July 3. The month with the fewest wet days in Adi Keyh is January, with an average of 0.7 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 Adi Keyh is August, with an average of 13.4 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 49% on August 5.

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. Adi Keyh experiences significant seasonal variation in monthly rainfall.

The rainy period of the year lasts for 6.9 months, from February 29 to September 27, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain in Adi Keyh is August, with an average rainfall of 3.1 inches.

The rainless period of the year lasts for 5.0 months, from September 27 to February 29. The month with the least rain in Adi Keyh is November, with an average rainfall of 0.2 inches.

The length of the day in Adi Keyh varies over the course of the year. In 2024, the shortest day is December 21, with 11 hours, 15 minutes of daylight; the longest day is June 20, with 13 hours, 0 minutes of daylight.

The earliest sunrise is at 5:51 AM on June 3, and the latest sunrise is 1 hour, 0 minutes later at 6:52 AM on January 22. The earliest sunset is at 5:49 PM on November 21, and the latest sunset is 1 hour, 7 minutes later at 6:56 PM on July 7.

Daylight saving time (DST) is not observed in Adi Keyh during 2024.

The figure below presents a compact representation of key lunar data for 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.

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 Adi Keyh, 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 0% throughout.

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 Adi Keyh experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 2.2 months, from June 7 to August 14, with average wind speeds of more than 8.1 miles per hour. The windiest month of the year in Adi Keyh is July, with an average hourly wind speed of 9.7 miles per hour.

The calmer time of year lasts for 9.8 months, from August 14 to June 7. The calmest month of the year in Adi Keyh is September, with an average hourly wind speed of 6.3 miles per hour.

The predominant average hourly wind direction in Adi Keyh varies throughout the year.

The wind is most often from the west for 3.4 months, from June 2 to September 13, with a peak percentage of 72% on July 16. The wind is most often from the east for 8.6 months, from September 13 to June 2, with a peak percentage of 65% on January 1.

Adi Keyh 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 3.6 months, from July 8 to October 27, with an average temperature above 88°F. The month of the year in Adi Keyh with the warmest water is September, with an average temperature of 90°F.

The time of year with cooler water lasts for 3.2 months, from December 28 to April 3, with an average temperature below 82°F. The month of the year in Adi Keyh with the coolest water is February, with an average temperature of 79°F.

To characterize how pleasant the weather is in Adi Keyh 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 times of year to visit Adi Keyh for general outdoor tourist activities are from late January to late May and from mid October to late November, with a peak score in the second week of April.

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 Adi Keyh for hot-weather activities is from early March to mid June, with a peak score in the last week of May.

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 Adi Keyh 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.

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.

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 3.5 months, from February 24 to June 9, with an average daily incident shortwave energy per square meter above 6.7 kWh. The brightest month of the year in Adi Keyh is April, with an average of 7.2 kWh.

The darker period of the year lasts for 1.5 months, from July 10 to August 25, with an average daily incident shortwave energy per square meter below 5.3 kWh. The darkest month of the year in Adi Keyh is August, with an average of 5.1 kWh.

For the purposes of this report, the geographical coordinates of Adi Keyh are 14.844 deg latitude, 39.377 deg longitude, and 7,844 ft elevation.

The topography within 2 miles of Adi Keyh contains very significant variations in elevation, with a maximum elevation change of 1,253 feet and an average elevation above sea level of 7,799 feet. Within 10 miles contains very significant variations in elevation (4,885 feet). Within 50 miles also contains extreme variations in elevation (11,280 feet).

The area within 2 miles of Adi Keyh is covered by cropland (45%), shrubs (24%), and grassland (17%), within 10 miles by shrubs (45%) and sparse vegetation (24%), and within 50 miles by shrubs (32%) and sparse vegetation (27%).