Climate and Average Weather Year Round in Hīrna Ethiopia

In Hīrna, it is warm and partly cloudy year round. Over the course of the year, the temperature typically varies from 50°F to 82°F and is rarely below 46°F or above 87°F.

Based on the tourism score, the best times of year to visit Hīrna for warm-weather activities are from mid May to early July, from late August to late December, and from late December to mid March.

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

In Hīrna, 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 Hīrna begins around August 8 and lasts for 7.0 months, ending around March 8.

The clearest month of the year in Hīrna is September, during which on average the sky is clear, mostly clear, or partly cloudy 62% of the time.

The cloudier part of the year begins around March 8 and lasts for 5.0 months, ending around August 8.

The cloudiest month of the year in Hīrna is April, during which on average the sky is overcast or mostly cloudy 63% 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 Hīrna varies very significantly throughout the year.

The wetter season lasts 5.3 months, from April 9 to September 18, with a greater than 39% chance of a given day being a wet day. The month with the most wet days in Hīrna is August, with an average of 22.2 days with at least 0.04 inches of precipitation.

The drier season lasts 6.7 months, from September 18 to April 9. The month with the fewest wet days in Hīrna is December, with an average of 1.4 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 Hīrna is August, with an average of 22.2 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 74% on August 4.

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. Hīrna experiences extreme seasonal variation in monthly rainfall.

The rainy period of the year lasts for 10 months, from January 15 to November 23, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain in Hīrna is August, with an average rainfall of 6.0 inches.

The rainless period of the year lasts for 1.7 months, from November 23 to January 15. The month with the least rain in Hīrna is December, with an average rainfall of 0.3 inches.

The length of the day in Hīrna does not vary substantially over the course of the year, staying within 39 minutes of 12 hours throughout. In 2024, the shortest day is December 21, with 11 hours, 35 minutes of daylight; the longest day is June 20, with 12 hours, 40 minutes of daylight.

The earliest sunrise is at 5:54 AM on May 29, and the latest sunrise is 43 minutes later at 6:37 AM on January 29. The earliest sunset is at 5:51 PM on November 15, and the latest sunset is 49 minutes later at 6:39 PM on July 13.

Daylight saving time (DST) is not observed in Hīrna 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 Hīrna, 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 Hīrna experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 3.4 months, from May 30 to September 12, with average wind speeds of more than 7.0 miles per hour. The windiest month of the year in Hīrna is July, with an average hourly wind speed of 9.0 miles per hour.

The calmer time of year lasts for 8.6 months, from September 12 to May 30. The calmest month of the year in Hīrna is November, with an average hourly wind speed of 4.7 miles per hour.

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

The wind is most often from the east for 6.0 days, from February 22 to February 28 and for 3.9 weeks, from October 3 to October 30, with a peak percentage of 44% on October 16. The wind is most often from the south for 7.2 months, from February 28 to October 3, with a peak percentage of 91% on August 15. The wind is most often from the north for 3.8 months, from October 30 to February 22, with a peak percentage of 54% on January 1.

To characterize how pleasant the weather is in Hīrna 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 Hīrna for general outdoor tourist activities are from mid May to early July, from late August to late December, and from late December to mid March, with a peak score in the first week of October.

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 Hīrna for hot-weather activities are from late February to mid March and from mid May to late June, with a peak score in the second week of June.

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 Hīrna 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 1.3 months, from February 9 to March 18, with an average daily incident shortwave energy per square meter above 6.9 kWh. The brightest month of the year in Hīrna is February, with an average of 6.9 kWh.

The darker period of the year lasts for 1.1 months, from July 6 to August 9, with an average daily incident shortwave energy per square meter below 6.1 kWh. The darkest month of the year in Hīrna is July, with an average of 6.0 kWh.

For the purposes of this report, the geographical coordinates of Hīrna are 9.217 deg latitude, 41.100 deg longitude, and 5,869 ft elevation.

The topography within 2 miles of Hīrna contains very significant variations in elevation, with a maximum elevation change of 1,942 feet and an average elevation above sea level of 6,284 feet. Within 10 miles contains very significant variations in elevation (4,646 feet). Within 50 miles also contains extreme variations in elevation (8,891 feet).

The area within 2 miles of Hīrna is covered by cropland (98%), within 10 miles by cropland (80%) and shrubs (20%), and within 50 miles by cropland (42%) and shrubs (26%).