Climate and Average Weather Year Round in Carndonagh Ireland
In Carndonagh, the summers are cool and windy; the winters are long, very cold, wet, and extremely windy; and it is mostly cloudy year round. Over the course of the year, the temperature typically varies from 37°F to 63°F and is rarely below 30°F or above 69°F.
Based on the tourism score, the best time of year to visit Carndonagh for warm-weather activities is from early July to late August.
Climate in Carndonagh
Average Temperature in Carndonagh
The warm season lasts for 3.1 months, from June 11 to September 16, with an average daily high temperature above 59°F. The hottest day of the year is July 31, with an average high of 63°F and low of 53°F.
The cool season lasts for 4.1 months, from November 20 to March 25, with an average daily high temperature below 48°F. The coldest day of the year is February 17, with an average low of 37°F and high of 45°F.
Average High and Low Temperature in Carndonagh
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 Carndonagh
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
In Carndonagh, the average percentage of the sky covered by clouds experiences mild seasonal variation over the course of the year.
The clearer part of the year in Carndonagh begins around April 4 and lasts for 6.5 months, ending around October 20. On May 23, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 46% of the time, and overcast or mostly cloudy 54% of the time.
The cloudier part of the year begins around October 20 and lasts for 5.5 months, ending around April 4. On January 26, the cloudiest day of the year, the sky is overcast or mostly cloudy 72% of the time, and clear, mostly clear, or partly cloudy 28% of the time.
Cloud Cover Categories in Carndonagh
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Carndonagh varies throughout the year.
The wetter season lasts 5.1 months, from October 11 to March 13, with a greater than 43% chance of a given day being a wet day. The chance of a wet day peaks at 57% on January 4.
The drier season lasts 6.9 months, from March 13 to October 11. The smallest chance of a wet day is 30% on May 16.
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 56% on January 3.
Daily Chance of Precipitation in Carndonagh
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. Carndonagh experiences significant seasonal variation in monthly rainfall.
Rain falls throughout the year in Carndonagh. The most rain falls during the 31 days centered around October 27, with an average total accumulation of 4.1 inches.
The least rain falls around May 8, with an average total accumulation of 2.0 inches.
Average Monthly Rainfall in Carndonagh
The length of the day in Carndonagh varies extremely over the course of the year. In 2021, the shortest day is December 21, with 7 hours, 7 minutes of daylight; the longest day is June 21, with 17 hours, 26 minutes of daylight.
Hours of Daylight and Twilight in Carndonagh
The earliest sunrise is at 4:47 AM on June 18, and the latest sunrise is 4 hours, 8 minutes later at 8:55 AM on December 29. The earliest sunset is at 3:58 PM on December 14, and the latest sunset is 6 hours, 15 minutes later at 10:14 PM on June 24.
Daylight saving time (DST) is observed in Carndonagh during 2021, starting in the spring on March 28, lasting 7.1 months, and ending in the fall on October 31.
Sunrise & Sunset with Twilight and Daylight Saving Time in Carndonagh
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 in Carndonagh
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 Carndonagh, 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.
Humidity Comfort Levels in Carndonagh
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
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 Carndonagh experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 5.8 months, from October 5 to March 30, with average wind speeds of more than 16.1 miles per hour. The windiest day of the year is January 7, with an average hourly wind speed of 20.0 miles per hour.
The calmer time of year lasts for 6.2 months, from March 30 to October 5. The calmest day of the year is July 24, with an average hourly wind speed of 12.2 miles per hour.
Average Wind Speed in Carndonagh
The predominant average hourly wind direction in Carndonagh varies throughout the year.
The wind is most often from the west for 2.3 weeks, from January 22 to February 7; for 2.5 months, from February 15 to April 29; for 4.7 months, from May 8 to September 29; and for 4.3 weeks, from October 29 to November 28, with a peak percentage of 43% on August 17. The wind is most often from the south for 1.1 weeks, from February 7 to February 15; for 1.3 weeks, from April 29 to May 8; for 1.0 months, from September 29 to October 29; and for 1.8 months, from November 28 to January 22, with a peak percentage of 37% on February 12.
Wind Direction in Carndonagh
Carndonagh 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 3.1 months, from July 9 to October 13, with an average temperature above 56°F. The day of the year with the warmest water is August 21, with an average temperature of 58°F.
The time of year with cooler water lasts for 3.9 months, from January 3 to April 30, with an average temperature below 49°F. The day of the year with the coolest water is March 5, with an average temperature of 46°F.
Average Water Temperature in Carndonagh
Best Time of Year to Visit
To characterize how pleasant the weather is in Carndonagh 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 Carndonagh for general outdoor tourist activities is from early July to late August, with a peak score in the last week of July.
Tourism Score in Carndonagh
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 Carndonagh for hot-weather activities is from early July to early August, with a peak score in the third week of July.
Beach/Pool Score in Carndonagh
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).
The growing season in Carndonagh typically lasts for 7.6 months (232 days), from around April 5 to around November 23, rarely starting before February 24 or after May 4, and rarely ending before October 22 or after December 22.
Time Spent in Various Temperature Bands and the Growing Season in Carndonagh
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
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.
Based on growing degree days alone, the first spring blooms in Carndonagh should appear around May 26, only rarely appearing before May 12 or after June 14.
Growing Degree Days in Carndonagh
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 extreme seasonal variation over the course of the year.
The brighter period of the year lasts for 3.4 months, from April 30 to August 11, with an average daily incident shortwave energy per square meter above 4.6 kWh. The brightest day of the year is June 7, with an average of 5.7 kWh.
The darker period of the year lasts for 4.1 months, from October 21 to February 23, with an average daily incident shortwave energy per square meter below 1.4 kWh. The darkest day of the year is December 22, with an average of 0.4 kWh.
Average Daily Incident Shortwave Solar Energy in Carndonagh
For the purposes of this report, the geographical coordinates of Carndonagh are 55.250 deg latitude, -7.267 deg longitude, and 105 ft elevation.
The topography within 2 miles of Carndonagh contains significant variations in elevation, with a maximum elevation change of 620 feet and an average elevation above sea level of 202 feet. Within 10 miles contains significant variations in elevation (1,998 feet). Within 50 miles also contains large variations in elevation (2,395 feet).
The area within 2 miles of Carndonagh is covered by grassland (52%), herbaceous vegetation (19%), and trees (10%), within 10 miles by herbaceous vegetation (27%) and water (25%), and within 50 miles by water (54%) and grassland (24%).
This report illustrates the typical weather in Carndonagh, 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 are 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Carndonagh.
For each station, the records are corrected for the elevation difference between that station and Carndonagh according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
The estimated value at Carndonagh is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Carndonagh and a given station.
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.
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.