Climate and Average Weather Year Round at Race Rocks Automatic Weather Reporting System Canada

At Race Rocks Automatic Weather Reporting System, the summers are short, cool, dry, and partly cloudy and the winters are long, very cold, wet, and mostly cloudy. Over the course of the year, the temperature typically varies from 40°F to 66°F and is rarely below 31°F or above 76°F.

Based on the tourism score, the best time of year to visit Race Rocks Automatic Weather Reporting System for warm-weather activities is from mid July to early September.

The warm season lasts for 2.9 months, from June 27 to September 22, with an average daily high temperature above 62°F. The hottest month of the year at Race Rocks Automatic Weather Reporting System is August, with an average high of 66°F and low of 54°F.

The cool season lasts for 4.1 months, from November 17 to March 19, with an average daily high temperature below 50°F. The coldest month of the year at Race Rocks Automatic Weather Reporting System is December, with an average low of 41°F and high of 47°F.

At Race Rocks Automatic Weather Reporting System, 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 Race Rocks Automatic Weather Reporting System begins around June 6 and lasts for 3.8 months, ending around October 1.

The clearest month of the year at Race Rocks Automatic Weather Reporting System is August, during which on average the sky is clear, mostly clear, or partly cloudy 70% of the time.

The cloudier part of the year begins around October 1 and lasts for 8.2 months, ending around June 6.

The cloudiest month of the year at Race Rocks Automatic Weather Reporting System is January, during which on average the sky is overcast or mostly cloudy 70% of the time.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days at Race Rocks Automatic Weather Reporting System varies very significantly throughout the year.

The wetter season lasts 6.5 months, from October 9 to April 24, with a greater than 34% chance of a given day being a wet day. The month with the most wet days at Race Rocks Automatic Weather Reporting System is November, with an average of 17.5 days with at least 0.04 inches of precipitation.

The drier season lasts 5.5 months, from April 24 to October 9. The month with the fewest wet days at Race Rocks Automatic Weather Reporting System is July, with an average of 3.2 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. The month with the most days of rain alone at Race Rocks Automatic Weather Reporting System is November, with an average of 17.3 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 60% on November 16.

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. Race Rocks Automatic Weather Reporting System experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year at Race Rocks Automatic Weather Reporting System. The month with the most rain at Race Rocks Automatic Weather Reporting System is November, with an average rainfall of 8.0 inches.

The month with the least rain at Race Rocks Automatic Weather Reporting System is July, with an average rainfall of 0.7 inches.

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Race Rocks Automatic Weather Reporting System experiences some seasonal variation in monthly snowfall.

The snowy period of the year lasts for 1.0 months, from December 16 to January 15, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow at Race Rocks Automatic Weather Reporting System is December, with an average snowfall of 1.0 inches.

The snowless period of the year lasts for 11 months, from January 15 to December 16. The least snow falls around July 18, with an average total accumulation of 0.0 inches.

The length of the day at Race Rocks Automatic Weather Reporting System varies extremely over the course of the year. In 2024, the shortest day is December 21, with 8 hours, 20 minutes of daylight; the longest day is June 20, with 16 hours, 6 minutes of daylight.

The earliest sunrise is at 5:12 AM on June 15, and the latest sunrise is 2 hours, 53 minutes later at 8:05 AM on December 31. The earliest sunset is at 4:19 PM on December 10, and the latest sunset is 5 hours, 0 minutes later at 9:19 PM on June 25.

Daylight saving time (DST) is observed at Race Rocks Automatic Weather Reporting System during 2024, starting in the spring on March 10, lasting 7.8 months, and ending in the fall on November 3.

The 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.

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 at Race Rocks Automatic Weather Reporting System, 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.

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 at Race Rocks Automatic Weather Reporting System experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 5.3 months, from October 25 to April 5, with average wind speeds of more than 5.6 miles per hour. The windiest month of the year at Race Rocks Automatic Weather Reporting System is December, with an average hourly wind speed of 6.9 miles per hour.

The calmer time of year lasts for 6.6 months, from April 5 to October 25. The calmest month of the year at Race Rocks Automatic Weather Reporting System is August, with an average hourly wind speed of 4.2 miles per hour.

The predominant average hourly wind direction at Race Rocks Automatic Weather Reporting System varies throughout the year.

The wind is most often from the south for 3.3 weeks, from February 26 to March 20 and for 1.6 months, from October 16 to December 4, with a peak percentage of 38% on November 11. The wind is most often from the west for 6.9 months, from March 20 to October 16, with a peak percentage of 76% on July 17. The wind is most often from the east for 2.8 months, from December 4 to February 26, with a peak percentage of 39% on January 1.

Race Rocks Automatic Weather Reporting System 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 3.0 months, from June 18 to September 19, with an average temperature above 53°F. The month of the year at Race Rocks Automatic Weather Reporting System with the warmest water is August, with an average temperature of 54°F.

The time of year with cooler water lasts for 3.9 months, from December 7 to April 3, with an average temperature below 48°F. The month of the year at Race Rocks Automatic Weather Reporting System with the coolest water is February, with an average temperature of 46°F.

To characterize how pleasant the weather is at Race Rocks Automatic Weather Reporting System 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 Race Rocks Automatic Weather Reporting System for general outdoor tourist activities is from mid July 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 Race Rocks Automatic Weather Reporting System for hot-weather activities is from late July to early August.

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.

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 at Race Rocks Automatic Weather Reporting System typically lasts for 10 months (309 days), from around February 15 to around December 20, rarely starting after March 28, or ending before November 14.

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 Race Rocks Automatic Weather Reporting System should appear around May 14, only rarely appearing before April 25 or after June 7.

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 3.3 months, from May 11 to August 20, with an average daily incident shortwave energy per square meter above 5.7 kWh. The brightest month of the year at Race Rocks Automatic Weather Reporting System is July, with an average of 6.9 kWh.

The darker period of the year lasts for 3.9 months, from October 22 to February 19, with an average daily incident shortwave energy per square meter below 2.1 kWh. The darkest month of the year at Race Rocks Automatic Weather Reporting System is December, with an average of 0.9 kWh.