Average Weather in Clarence-Rockland Canada
In Clarence-Rockland, the summers are long, comfortable, and partly cloudy and the winters are freezing, snowy, and mostly cloudy. Over the course of the year, the temperature typically varies from 3°F to 79°F and is rarely below -16°F or above 86°F.
Based on the tourism score, the best time of year to visit Clarence-Rockland for warm-weather activities is from late June to early September.
The warm season lasts for 3.9 months, from May 20 to September 18, with an average daily high temperature above 67°F. The hottest day of the year is July 20, with an average high of 79°F and low of 58°F.
The cold season lasts for 3.3 months, from December 4 to March 12, with an average daily high temperature below 33°F. The coldest day of the year is January 29, with an average low of 3°F and high of 22°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
Lipetsk, Russia (4,645 miles away); Samara, Russia (4,899 miles); and Akabira, Japan (5,875 miles) are the far-away foreign places with temperatures most similar to Clarence-Rockland (view comparison).
In Clarence-Rockland, 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 Clarence-Rockland begins around May 26 and lasts for 4.9 months, ending around October 24. On August 10, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 64% of the time, and overcast or mostly cloudy 36% of the time.
The cloudier part of the year begins around October 24 and lasts for 7.1 months, ending around May 26. On January 5, the cloudiest day of the year, the sky is overcast or mostly cloudy 70% of the time, and clear, mostly clear, or partly cloudy 30% of the time.
Cloud Cover Categories
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Clarence-Rockland varies throughout the year.
The wetter season lasts 8.1 months, from April 9 to December 11, with a greater than 30% chance of a given day being a wet day. The chance of a wet day peaks at 39% on July 8.
The drier season lasts 3.9 months, from December 11 to April 9. The smallest chance of a wet day is 22% on January 29.
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 in Clarence-Rockland changes throughout the year.
Rain alone is the most common for 8.7 months, from March 15 to December 5. The highest chance of a day with rain alone is 39% on July 8.
Snow alone is the most common for 3.3 months, from December 5 to March 15. The highest chance of a day with snow alone is 17% on January 9.
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. Clarence-Rockland experiences significant seasonal variation in monthly rainfall.
Rain falls throughout the year in Clarence-Rockland. The most rain falls during the 31 days centered around June 26, with an average total accumulation of 3.2 inches.
The least rain falls around February 6, with an average total accumulation of 0.5 inches.
Average Monthly Rainfall
We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. Colder, drier snow tends to be on the higher end of that range and warmer, wetter snow on the lower end.
As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Clarence-Rockland experiences significant seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 6.0 months, from October 27 to April 25, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around December 25, with an average total liquid-equivalent accumulation of 1.4 inches.
The snowless period of the year lasts for 6.0 months, from April 25 to October 27. The least snow falls around July 27, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in Clarence-Rockland varies significantly over the course of the year. In 2018, the shortest day is December 21, with 8 hours, 42 minutes of daylight; the longest day is June 21, with 15 hours, 42 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:11 AM on June 16, and the latest sunrise is 2 hours, 32 minutes later at 7:43 AM on November 3. The earliest sunset is at 4:17 PM on December 10, and the latest sunset is 4 hours, 37 minutes later at 8:54 PM on June 26.
Daylight saving time (DST) is observed in Clarence-Rockland during 2018, starting in the spring on March 11, lasting 7.8 months, and ending in the fall on November 4.
Sunrise & Sunset with Twilight and Daylight Saving Time
Clarence-Rockland experiences some seasonal variation in the perceived humidity.
The muggier period of the year lasts for 3.3 months, from June 6 to September 16, during which time the comfort level is muggy, oppressive, or miserable at least 5% of the time. The muggiest day of the year is July 27, with muggy conditions 19% of the time.
The least muggy day of the year is December 2, when muggy conditions are essentially unheard of.
Humidity Comfort Levels
The average hourly wind speed in Clarence-Rockland experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 4.5 months, from December 9 to April 25, with average wind speeds of more than 5.7 miles per hour. The windiest day of the year is February 19, with an average hourly wind speed of 7.6 miles per hour.
The calmer time of year lasts for 7.5 months, from April 25 to December 9. The calmest day of the year is July 31, with an average hourly wind speed of 3.7 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Clarence-Rockland varies throughout the year.
The wind is most often from the south for 6.0 days, from September 14 to September 20, with a peak percentage of 33% on September 18. The wind is most often from the west for 12 months, from September 20 to September 14, with a peak percentage of 39% on January 1.
Best Time of Year to Visit
To characterize how pleasant the weather is in Clarence-Rockland 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 Clarence-Rockland for general outdoor tourist activities is from late June to early September, with a peak score in the first week of August.
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 Clarence-Rockland for hot-weather activities is from early July to mid August, 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 Clarence-Rockland typically lasts for 4.8 months (146 days), from around May 10 to around October 3, rarely starting before April 23 or after May 27, and rarely ending before September 16 or after October 20.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in Clarence-Rockland should appear around May 6, only rarely appearing before April 26 or after May 16.
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 May 5 to August 22, with an average daily incident shortwave energy per square meter above 5.6 kWh. The brightest day of the year is June 30, with an average of 6.7 kWh.
The darker period of the year lasts for 3.4 months, from October 27 to February 11, with an average daily incident shortwave energy per square meter below 2.3 kWh. The darkest day of the year is December 17, with an average of 1.2 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Clarence-Rockland are 45.550 deg latitude, -75.291 deg longitude, and 167 ft elevation.
The topography within 2 miles of Clarence-Rockland contains only modest variations in elevation, with a maximum elevation change of 207 feet and an average elevation above sea level of 167 feet. Within 10 miles contains only modest variations in elevation (965 feet). Within 50 miles also contains very significant variations in elevation (1,939 feet).
The area within 2 miles of Clarence-Rockland is covered by water (32%), trees (31%), cropland (23%), and artificial surfaces (12%), within 10 miles by trees (47%) and cropland (37%), and within 50 miles by trees (65%) and cropland (22%).
This report illustrates the typical weather in Clarence-Rockland, 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 Clarence-Rockland.
For each station, the records are corrected for the elevation difference between that station and Clarence-Rockland 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 Clarence-Rockland is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Clarence-Rockland and a given station.
The stations contributing to this reconstruction are: Gatineau Airport (63%, 22 kilometers, west); Cornwall Regional Airport (23%, 42 kilometers, southeast); and Harrington (14%, 58 kilometers, northeast).
Time zones for aiports and weather stations are provided by AskGeo.com .