Average Weather in Glenariff United Kingdom
In Glenariff, 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 35°F to 61°F and is rarely below 27°F or above 68°F.
Based on the tourism score, the best time of year to visit Glenariff for warm-weather activities is from early July to late August.
The warm season lasts for 3.1 months, from June 12 to September 17, with an average daily high temperature above 58°F. The hottest day of the year is August 1, with an average high of 61°F and low of 51°F.
The cool season lasts for 4.0 months, from November 21 to March 22, with an average daily high temperature below 46°F. The coldest day of the year is February 17, with an average low of 35°F and high of 43°F.
Average High and Low Temperature
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 Glenariff, 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 Glenariff begins around April 5 and lasts for 6.4 months, ending around October 18. On July 18, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 49% of the time, and overcast or mostly cloudy 51% of the time.
The cloudier part of the year begins around October 18 and lasts for 5.6 months, ending around April 5. On January 27, the cloudiest day of the year, the sky is overcast or mostly cloudy 69% of the time, and clear, mostly clear, or partly cloudy 31% of the time.
Cloud Cover Categories
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 Glenariff varies throughout the year.
The wetter season lasts 4.0 months, from October 7 to February 6, with a greater than 40% chance of a given day being a wet day. The chance of a wet day peaks at 50% on January 4.
The drier season lasts 8.0 months, from February 6 to October 7. The smallest chance of a wet day is 29% on June 4.
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 48% on January 4.
Daily Chance of Precipitation
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. Glenariff experiences some seasonal variation in monthly rainfall.
Rain falls throughout the year in Glenariff. The most rain falls during the 31 days centered around October 26, with an average total accumulation of 3.7 inches.
The least rain falls around May 7, with an average total accumulation of 1.9 inches.
Average Monthly Rainfall
The length of the day in Glenariff varies extremely over the course of the year. In 2018, the shortest day is December 21, with 7 hours, 9 minutes of daylight; the longest day is June 21, with 17 hours, 23 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 4:44 AM on June 18, and the latest sunrise is 4 hours, 6 minutes later at 8:49 AM on December 30. The earliest sunset is at 3:55 PM on December 14, and the latest sunset is 6 hours, 13 minutes later at 10:07 PM on June 24.
Daylight saving time (DST) is observed in Glenariff during 2018, starting in the spring on March 25, lasting 7.1 months, and ending in the fall on October 28.
Sunrise & Sunset with Twilight and Daylight Saving Time
The perceived humidity level in Glenariff, 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
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Glenariff experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 5.8 months, from October 3 to March 30, with average wind speeds of more than 15.1 miles per hour. The windiest day of the year is January 7, with an average hourly wind speed of 18.8 miles per hour.
The calmer time of year lasts for 6.2 months, from March 30 to October 3. The calmest day of the year is July 24, with an average hourly wind speed of 11.5 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Glenariff varies throughout the year.
The wind is most often from the west for 1.7 weeks, from January 27 to February 8; for 1.8 months, from February 15 to April 8; for 3.7 months, from June 5 to September 26; and for 4.1 weeks, from October 30 to November 28, with a peak percentage of 39% on August 17. The wind is most often from the south for 1.0 weeks, from February 8 to February 15; for 1.9 months, from April 8 to June 5; for 1.1 months, from September 26 to October 30; and for 2.0 months, from November 28 to January 27, with a peak percentage of 37% on October 12.
Glenariff 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 3.5 months, from July 13 to October 30, with an average temperature above 55°F. The day of the year with the warmest water is September 3, with an average temperature of 57°F.
The time of year with cooler water lasts for 3.7 months, from January 15 to May 4, with an average temperature below 48°F. The day of the year with the coolest water is March 13, with an average temperature of 45°F.
Average Water Temperature
Best Time of Year to Visit
To characterize how pleasant the weather is in Glenariff 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 Glenariff for general outdoor tourist activities is from early July to late August, with a peak score in the last week of July.
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 Glenariff for hot-weather activities is for the entire month of July, with a peak score in the third week of July.
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.
The growing season in Glenariff typically lasts for 6.6 months (202 days), from around April 19 to around November 6, rarely starting before March 22 or after May 13, and rarely ending before October 14 or after December 7.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in Glenariff should appear around June 8, only rarely appearing before May 26 or after June 25.
Growing Degree Days
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 3.5 months, from April 29 to August 11, with an average daily incident shortwave energy per square meter above 4.7 kWh. The brightest day of the year is June 14, with an average of 5.8 kWh.
The darker period of the year lasts for 4.0 months, from October 22 to February 23, with an average daily incident shortwave energy per square meter below 1.5 kWh. The darkest day of the year is December 22, with an average of 0.4 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Glenariff are 55.050 deg latitude, -6.067 deg longitude, and 666 ft elevation.
The topography within 2 miles of Glenariff contains very significant variations in elevation, with a maximum elevation change of 1,319 feet and an average elevation above sea level of 505 feet. Within 10 miles also contains very significant variations in elevation (1,804 feet). Within 50 miles contains very significant variations in elevation (2,385 feet).
The area within 2 miles of Glenariff is covered by grassland (58%), water (16%), and shrubs (13%), within 10 miles by grassland (36%) and water (32%), and within 50 miles by water (51%) and grassland (32%).
This report illustrates the typical weather in Glenariff, 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 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Glenariff.
For each station, the records are corrected for the elevation difference between that station and Glenariff 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 Glenariff is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Glenariff and a given station.
The stations contributing to this reconstruction are: Belfast International Airport (44%, 45 kilometers, south); Machrihanish Meteorlogical Station (36%, 49 kilometers, northeast); and West Freugh (20%, 75 kilometers, east).
Time zones for aiports and weather stations are provided by AskGeo.com .