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Average Weather in Rathdowney Ireland

In Rathdowney, the summers are comfortable and partly cloudy and the winters are long, very cold, wet, windy, and mostly cloudy. Over the course of the year, the temperature typically varies from 36°F to 67°F and is rarely below 27°F or above 74°F.

Based on the tourism score, the best time of year to visit Rathdowney for warm-weather activities is from late June to late August.

Climate Summary

coldcoolcomfortablecoolcoldJanFebMarAprMayJunJulAugSepOctNovDec49%49%27%27%overcastclearprecipitation: 3.0 inprecipitation: 3.0 in1.7 in1.7 inmuggy: 1%muggy: 1%0%0%drydrytourism score: 5.9tourism score: 5.90.10.1
Click on each chart for more information.

Temperature

The warm season lasts for 3.1 months, from June 8 to September 12, with an average daily high temperature above 62°F. The hottest day of the year is July 27, with an average high of 67°F and low of 53°F.

The cool season lasts for 4.0 months, from November 15 to March 15, with an average daily high temperature below 49°F. The coldest day of the year is February 18, with an average low of 36°F and high of 46°F.

Average High and Low Temperature

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 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

Average Hourly Temperature in RathdowneyJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMvery coldvery coldcoldcoolcoolcomfortable
The average hourly temperature, color coded into bands: 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 shaded overlays indicate night and civil twilight.

Victoria, Canada (4,498 miles away) is the far-away foreign place with temperatures most similar to Rathdowney (view comparison).

Clouds

In Rathdowney, 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 Rathdowney begins around April 4 and lasts for 6.2 months, ending around October 12. On July 27, 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 12 and lasts for 5.8 months, ending around April 4. On December 25, the cloudiest day of the year, the sky is overcast or mostly cloudy 73% of the time, and clear, mostly clear, or partly cloudy 27% of the time.

Cloud Cover Categories

Cloud Cover Categories in RathdowneyclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jul 2749%Jul 2749%Dec 2527%Dec 2527%Apr 438%Apr 438%Oct 1238%Oct 1238%clearmostly clearpartly cloudymostly cloudyovercast
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.

Precipitation

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

The wetter season lasts 3.9 months, from October 9 to February 5, with a greater than 36% chance of a given day being a wet day. The chance of a wet day peaks at 44% on January 5.

The drier season lasts 8.1 months, from February 5 to October 9. The smallest chance of a wet day is 27% on April 23.

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 42% on January 5.

Daily Chance of Precipitation

Daily Chance of Precipitation in RathdowneywetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Jan 544%Jan 544%Apr 2327%Apr 2327%Jan 143%Jan 143%Oct 936%Oct 936%rainmixed
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 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. Rathdowney experiences some seasonal variation in monthly rainfall.

Rain falls throughout the year in Rathdowney. The most rain falls during the 31 days centered around October 27, with an average total accumulation of 3.0 inches.

The least rain falls around April 20, with an average total accumulation of 1.7 inches.

Average Monthly Rainfall

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 liquid-equivalent snowfall.

Sun

The length of the day in Rathdowney varies extremely over the course of the year. In 2018, the shortest day is December 21, with 7 hours, 35 minutes of daylight; the longest day is June 21, with 16 hours, 54 minutes of daylight.

Hours of Daylight and Twilight

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 is at 5:04 AM on June 17, and the latest sunrise is 3 hours, 38 minutes later at 8:43 AM on December 30. The earliest sunset is at 4:14 PM on December 13, and the latest sunset is 5 hours, 45 minutes later at 9:59 PM on June 24.

Daylight saving time (DST) is observed in Rathdowney 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

Sunrise & Sunset with Twilight and Daylight Saving Time in RathdowneyJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 175:04 AMJun 175:04 AM9:59 PMJun 249:59 PMJun 24Dec 134:14 PMDec 134:14 PM8:43 AMDec 308:43 AMDec 30Mar 25DSTMar 25DSTDSTOct 28DSTOct 28daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of the year 2018. 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 transitions to and from daylight saving time are indicated by the 'DST' labels.

Humidity

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 Rathdowney, 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

Humidity Comfort Levels in RathdowneyJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Feb 70%Feb 70%Jul 261%Jul 261%comfortablecomfortabledrydryhumidhumid
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.

Wind

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 Rathdowney experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 5.2 months, from October 26 to March 31, with average wind speeds of more than 11.9 miles per hour. The windiest day of the year is January 3, with an average hourly wind speed of 13.8 miles per hour.

The calmer time of year lasts for 6.8 months, from March 31 to October 26. The calmest day of the year is July 26, with an average hourly wind speed of 10.1 miles per hour.

Average Wind Speed

Average Wind Speed in RathdowneywindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph2 mph4 mph6 mph8 mph10 mph12 mph14 mph16 mph18 mph20 mph22 mphJan 313.8 mphJan 313.8 mphJul 2610.1 mphJul 2610.1 mphOct 2611.9 mphOct 2611.9 mphMar 3111.9 mphMar 3111.9 mph
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

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

The wind is most often from the west for 3.6 months, from January 12 to April 29; for 4.7 months, from May 7 to September 29; and for 1.6 months, from October 29 to December 17, with a peak percentage of 44% on July 19. The wind is most often from the south for 1.1 weeks, from April 29 to May 7; for 1.0 months, from September 29 to October 29; and for 3.7 weeks, from December 17 to January 12, with a peak percentage of 37% on October 13.

Wind Direction

Wind Direction in RathdowneySWWSWSJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%westsouthnortheast
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Water Temperature

Rathdowney 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 3.2 months, from June 26 to October 2, with an average temperature above 58°F. The day of the year with the warmest water is August 5, with an average temperature of 61°F.

The time of year with cooler water lasts for 4.0 months, from December 25 to April 24, with an average temperature below 50°F. The day of the year with the coolest water is March 3, with an average temperature of 47°F.

Average Water Temperature

The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Best Time of Year to Visit

To characterize how pleasant the weather is in Rathdowney 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 Rathdowney for general outdoor tourist activities is from late June to late August, with a peak score in the last week of July.

Tourism Score

Tourism Score in Rathdowneybest timeJanFebMarAprMayJunJulAugSepOctNovDec02468105.95.90.10.1precipitationprecipitationcloudscloudstemperaturetemperaturetourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

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 Rathdowney for hot-weather activities is from mid July to early August, with a peak score in the last week of July.

Beach/Pool Score

Beach/Pool Score in RathdowneyJanFebMarAprMayJunJulAugSepOctNovDec02468101.21.20.00.0 precipitationprecipitationcloudscloudstemperaturetemperature
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

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.

Growing Season

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 Rathdowney typically lasts for 6.5 months (198 days), from around April 18 to around November 2, rarely starting before March 21 or after May 14, and rarely ending before October 9 or after November 26.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season in Rathdowneygrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Apr 1850%Apr 1850%Nov 250%Nov 290%May 1490%May 1490%Oct 990%Oct 910%Mar 2110%Mar 2110%Nov 2610%Nov 260%Jan 300%Jan 30Jul 24100%Jul 24100%very coldcoldcool
The percentage of time spent in various temperature bands: 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 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.

Based on growing degree days alone, the first spring blooms in Rathdowney should appear around May 10, only rarely appearing before April 26 or after May 26.

Growing Degree Days

Growing Degree Days in RathdowneyJanFebMarAprMayJunJulAugSepOctNovDec0°F200°F400°F600°F800°F1,000°F1,200°F1,400°FMay 1090°FMay 1090°FAug 25900°FAug 25900°FDec 311,238°FDec 311,238°F
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

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 May 1 to August 15, with an average daily incident shortwave energy per square meter above 4.9 kWh. The brightest day of the year is June 12, with an average of 5.9 kWh.

The darker period of the year lasts for 3.9 months, from October 24 to February 20, with an average daily incident shortwave energy per square meter below 1.6 kWh. The darkest day of the year is December 22, with an average of 0.5 kWh.

Average Daily Incident Shortwave Solar Energy

The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Rathdowney are 52.855 deg latitude, -7.580 deg longitude, and 358 ft elevation.

The topography within 2 miles of Rathdowney contains only modest variations in elevation, with a maximum elevation change of 190 feet and an average elevation above sea level of 336 feet. Within 10 miles contains only modest variations in elevation (919 feet). Within 50 miles contains very significant variations in elevation (3,107 feet).

The area within 2 miles of Rathdowney is covered by grassland (81%) and cropland (14%), within 10 miles by grassland (75%) and cropland (11%), and within 50 miles by grassland (63%) and cropland (14%).

Data Sources

This report illustrates the typical weather in Rathdowney, 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 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Rathdowney.

For each station, the records are corrected for the elevation difference between that station and Rathdowney 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 Rathdowney is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Rathdowney and a given station.

The stations contributing to this reconstruction are: Casement Aerodrome (33%, 90 kilometers, northeast); Shannon Airport (32%, 92 kilometers, west); Cork Airport (19%, 129 kilometers, southwest); and Ireland West Airport Knock (16%, 143 kilometers, northwest).

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , 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 aiports 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.

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.