Climate and Average Weather Year Round at Rocky Harbour CS, Nfld. CanadaAt Rocky Harbour CS, Nfld., the summers are comfortable, wet, and partly cloudy and the winters are freezing, snowy, windy, and overcast. Over the course of the year, the temperature typically varies from 11°F to 72°F and is rarely below -4°F or above 79°F. Based on the tourism score, the best time of year to visit Rocky Harbour CS, Nfld. for warm-weather activities is from early July to late August. Average Temperature at Rocky Harbour CS, Nfld.The warm season lasts for 3.0 months, from June 14 to September 12, with an average daily high temperature above 62°F. The hottest month of the year at Rocky Harbour CS, Nfld. is August, with an average high of 70°F and low of 53°F. The cold season lasts for 3.5 months, from December 3 to March 18, with an average daily high temperature below 34°F. The coldest month of the year at Rocky Harbour CS, Nfld. is February, with an average low of 12°F and high of 27°F. Average High and Low Temperature at Rocky Harbour CS, Nfld.
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 at Rocky Harbour CS, Nfld.
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 average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.
Kamenka, Russia (3,267 miles away) and Shebunino, Russia (5,706 miles) are the far-away foreign places with temperatures most similar to Rocky Harbour CS, Nfld. (view comparison). 
Compare Rocky Harbour CS, Nfld. to another city:CloudsAt Rocky Harbour CS, Nfld., 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 at Rocky Harbour CS, Nfld. begins around April 11 and lasts for 7.2 months, ending around November 18. The clearest month of the year at Rocky Harbour CS, Nfld. is August, during which on average the sky is clear, mostly clear, or partly cloudy 50% of the time. The cloudier part of the year begins around November 18 and lasts for 4.8 months, ending around April 11. The cloudiest month of the year at Rocky Harbour CS, Nfld. is January, during which on average the sky is overcast or mostly cloudy 86% of the time.
PrecipitationA wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days at Rocky Harbour CS, Nfld. varies throughout the year. The wetter season lasts 8.4 months, from May 21 to February 4, with a greater than 36% chance of a given day being a wet day. The month with the most wet days at Rocky Harbour CS, Nfld. is November, with an average of 12.3 days with at least 0.04 inches of precipitation. The drier season lasts 3.5 months, from February 4 to May 21. The month with the fewest wet days at Rocky Harbour CS, Nfld. is April, with an average of 9.5 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. Based on this categorization, the most common form of precipitation at Rocky Harbour CS, Nfld. changes throughout the year. Rain alone is the most common for 8.5 months, from March 22 to December 6. The month with the most days of rain alone at Rocky Harbour CS, Nfld. is September, with an average of 11.7 days. Snow alone is the most common for 3.3 months, from December 6 to March 17. The month with the most days of snow alone at Rocky Harbour CS, Nfld. is January, with an average of 7.4 days. Mixed snow and rain is the most common for 5.0 days, from March 17 to March 22. The month with the most days of mixed snow and rain at Rocky Harbour CS, Nfld. is December, with an average of 3.6 days.
RainfallTo 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. Rocky Harbour CS, Nfld. experiences significant seasonal variation in monthly rainfall. Rain falls throughout the year at Rocky Harbour CS, Nfld.. The month with the most rain at Rocky Harbour CS, Nfld. is September, with an average rainfall of 4.2 inches. The month with the least rain at Rocky Harbour CS, Nfld. is February, with an average rainfall of 0.9 inches. Average Monthly Rainfall at Rocky Harbour CS, Nfld.
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 snowfall.
SnowfallAs with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Rocky Harbour CS, Nfld. experiences extreme seasonal variation in monthly snowfall. The snowy period of the year lasts for 6.5 months, from October 22 to May 6, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow at Rocky Harbour CS, Nfld. is January, with an average snowfall of 22.4 inches. The snowless period of the year lasts for 5.5 months, from May 6 to October 22. The least snow falls around August 6, with an average total accumulation of 0.0 inches. Average Monthly Snowfall at Rocky Harbour CS, Nfld.
The average snowfall (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 rainfall.
SunThe length of the day at Rocky Harbour CS, Nfld. varies extremely over the course of the year. In 2024, the shortest day is December 21, with 8 hours, 8 minutes of daylight; the longest day is June 20, with 16 hours, 18 minutes of daylight. Hours of Daylight and Twilight at Rocky Harbour CS, Nfld.
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 5:13 AM on June 16, and the latest sunrise is 3 hours, 4 minutes later at 8:18 AM on December 31. The earliest sunset is at 4:21 PM on December 11, and the latest sunset is 5 hours, 11 minutes later at 9:32 PM on June 25. Daylight saving time (DST) is observed at Rocky Harbour CS, Nfld. during 2024, starting in the spring on March 10, lasting 7.8 months, and ending in the fall on November 3. Sunrise & Sunset with Twilight and Daylight Saving Time at Rocky Harbour CS, Nfld.
The solar day over the course of the year 2024. 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.
The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation. Solar Elevation and Azimuth at Rocky Harbour CS, Nfld.
northeastsouthwest
Solar elevation and azimuth over the course of the year 2024. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).
MoonThe 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. HumidityWe 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 at Rocky Harbour CS, Nfld., 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, staying within 2% of 2% throughout.
WindThis 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 at Rocky Harbour CS, Nfld. experiences significant seasonal variation over the course of the year. The windier part of the year lasts for 5.9 months, from October 10 to April 6, with average wind speeds of more than 9.2 miles per hour. The windiest month of the year at Rocky Harbour CS, Nfld. is January, with an average hourly wind speed of 11.3 miles per hour. The calmer time of year lasts for 6.1 months, from April 6 to October 10. The calmest month of the year at Rocky Harbour CS, Nfld. is July, with an average hourly wind speed of 6.9 miles per hour.
The predominant average hourly wind direction at Rocky Harbour CS, Nfld. varies throughout the year. The wind is most often from the south for 3.9 months, from April 20 to August 16, with a peak percentage of 45% on July 14. The wind is most often from the west for 8.1 months, from August 16 to April 20, with a peak percentage of 47% on January 1. Wind Direction at Rocky Harbour CS, Nfld.
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 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 TemperatureRocky Harbour CS, Nfld. 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 significant seasonal variation over the course of the year. The time of year with warmer water lasts for 2.2 months, from July 14 to September 21, with an average temperature above 54°F. The month of the year at Rocky Harbour CS, Nfld. with the warmest water is August, with an average temperature of 59°F. The time of year with cooler water lasts for 5.1 months, from December 8 to May 12, with an average temperature below 37°F. The month of the year at Rocky Harbour CS, Nfld. with the coolest water is March, with an average temperature of 31°F.
Best Time of Year to VisitTo characterize how pleasant the weather is at Rocky Harbour CS, Nfld. 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 Rocky Harbour CS, Nfld. for general outdoor tourist activities is from early July to late August, with a peak score in the first week of August. Tourism Score at Rocky Harbour CS, Nfld.
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 Rocky Harbour CS, Nfld. for hot-weather activities is from late July to mid August, with a peak score in the first week of August. Beach/Pool Score at Rocky Harbour CS, Nfld.
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).
MethodologyFor 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 SeasonDefinitions 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 at Rocky Harbour CS, Nfld. typically lasts for 4.4 months (133 days), from around May 25 to around October 5, rarely starting before May 7 or after June 11, and rarely ending before September 19 or after October 22. Time Spent in Various Temperature Bands and the Growing Season at Rocky Harbour CS, Nfld.
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 percentage of time spent in various temperature bands. 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 at Rocky Harbour CS, Nfld. should appear around June 11, only rarely appearing before May 31 or after June 22. Solar EnergyThis 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 3.7 months, from April 30 to August 21, with an average daily incident shortwave energy per square meter above 4.8 kWh. The brightest month of the year at Rocky Harbour CS, Nfld. is July, with an average of 5.7 kWh. The darker period of the year lasts for 3.8 months, from October 26 to February 19, with an average daily incident shortwave energy per square meter below 1.7 kWh. The darkest month of the year at Rocky Harbour CS, Nfld. is December, with an average of 0.7 kWh.
TopographyFor the purposes of this report, the geographical coordinates of Rocky Harbour CS, Nfld. are 49.567 deg latitude, -57.883 deg longitude, and 98 ft elevation. The topography within 2 miles of Rocky Harbour CS, Nfld. contains significant variations in elevation, with a maximum elevation change of 728 feet and an average elevation above sea level of 297 feet. Within 10 miles contains significant variations in elevation (2,641 feet). Within 50 miles also contains large variations in elevation (2,635 feet). The area within 2 miles of Rocky Harbour CS, Nfld. is covered by trees (60%), herbaceous vegetation (16%), water (13%), and grassland (10%), within 10 miles by trees (49%) and water (28%), and within 50 miles by water (47%) and trees (35%). Data SourcesThis report illustrates the typical weather at Rocky Harbour CS, Nfld., based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016. Temperature and Dew PointRocky Harbour CS, Nfld. has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required. In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations. The stations on which we may fall back are Deer Lake Regional Airport; Daniel's Harbour, Nfld; Stephenville International Airport; Badger, Nfld; Chevery, Que.; and Englee Meteorological Aeronautical Presentation System. Other DataAll 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 © OpenStreetMap contributors. DisclaimerThe 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. Please review our full terms contained on our Terms of Service page. |
