1. WeatherSpark.com
  2. Canada
  3. British Columbia
  4. White Rock
  5. January

Average Weather in January in White Rock Canada

Daily low temperatures are around 36°F, rarely falling below 23°F or exceeding 45°F. The lowest daily average low temperature is 35°F on January 2.

For reference, on August 3, the hottest day of the year, temperatures in White Rock typically range from 57°F to 72°F, while on January 2, the coldest day of the year, they range from 35°F to 44°F.

Average High and Low Temperature in January

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 hourly average temperatures for the quarter of the year centered on January. The horizontal axis is the day, 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 January

Average Hourly Temperature in January in White Rock18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM4 AM8 AM12 PM4 PM8 PM12 AMDecFebvery coldcold
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.

Duclair, France (4,860 miles away) is the far-away foreign place with temperatures most similar to White Rock (view comparison).

Clouds

The month of January in White Rock experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 70% throughout the month. The highest chance of overcast or mostly cloudy conditions is 71% on January 19.

The clearest day of the month is January 30, with clear, mostly clear, or partly cloudy conditions 30% of the time.

For reference, on January 14, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 71%, while on August 3, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 73%.

Cloud Cover Categories in January

Cloud Cover Categories in January in White Rock1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%DecFebAug 373%Aug 373%Jan 130%Jan 130%Jan 3130%Jan 3130%Jan 1130%Jan 1130%Jan 2129%Jan 2129%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. In White Rock, the chance of a wet day over the course of January is gradually decreasing, starting the month at 50% and ending it at 46%.

For reference, the year's highest daily chance of a wet day is 59% on November 18, and its lowest chance is 10% on August 6.

Over the course of January in White Rock, the chance of a day with only rain decreases from 45% to 43%, the chance of a day with mixed snow and rain remains an essentially constant 4% throughout, and the chance of a day with only snow remains an essentially constant 1% throughout.

Probability of Precipitation in January

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 month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during January in White Rock is decreasing, starting the month at 5.9 inches, when it rarely exceeds 8.5 inches or falls below 3.2 inches, and ending the month at 5.2 inches, when it rarely exceeds 8.5 inches or falls below 2.3 inches.

Average Monthly Rainfall in January

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.

Snowfall

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. As with rainfall, we consider the liquid-equivalent snowfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day liquid-equivalent snowfall during January in White Rock is essentially constant, remaining about 0.2 inches throughout, and rarely exceeding 0.7 inches or falling below -0.0 inches.

Average Monthly Liquid-Equivalent Snowfall in January

The average liquid-equivalent 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.

Sun

Over the course of January in White Rock, the length of the day is rapidly increasing. From the start to the end of the month, the length of the day increases by 1 hour, 5 minutes, implying an average daily increase of 2 minutes, 11 seconds, and weekly increase of 15 minutes, 15 seconds.

The shortest day of the month is January 1, with 8 hours, 20 minutes of daylight and the longest day is January 31, with 9 hours, 25 minutes of daylight.

Hours of Daylight and Twilight in January

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 latest sunrise of the month in White Rock is 8:05 AM on January 1 and the earliest sunrise is 23 minutes earlier at 7:42 AM on January 31.

The earliest sunset is 4:24 PM on January 1 and the latest sunset is 43 minutes later at 5:07 PM on January 31.

Daylight saving time is observed in White Rock during 2017, but it neither starts nor ends during January, so the entire month is in standard time.

For reference, on June 21, the longest day of the year, the Sun rises at 5:06 AM and sets 16 hours, 13 minutes later, at 9:19 PM, while on December 21, the shortest day of the year, it rises at 8:02 AM and sets 8 hours, 13 minutes later, at 4:16 PM.

Sunrise & Sunset with Twilight in January

The solar day over the course of January. 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.

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 chance that a given day will be muggy in White Rock is essentially constant during January, remaining around 0% throughout.

For reference, on August 4, the muggiest day of the year, there are muggy conditions 2% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in January

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 White Rock is essentially constant during January, remaining within 0.2 miles per hour of 6.4 miles per hour throughout.

For reference, on December 4, the windiest day of the year, the daily average wind speed is 6.8 miles per hour, while on August 9, the calmest day of the year, the daily average wind speed is 3.0 miles per hour.

Average Wind Speed in January

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
The hourly average wind direction in White Rock throughout January is predominantly from the east, with a peak proportion of 53% on January 6.

Wind Direction in January

Wind Direction in January in White Rock1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%DecFebsoutheastnorthwest
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

White Rock 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 surface water temperature in White Rock is essentially constant during January, remaining around 45°F throughout.

The lowest average surface water temperature during January is 45°F on January 30.

Average Water Temperature in January

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

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 White Rock typically lasts for 8.5 months (261 days), from around March 4 to around November 20, rarely starting before February 9 or after March 23, and rarely ending before October 30 or after December 19.

The month of January in White Rock is very likely fully outside of the growing season, with the chance that a given day is in the growing season reaching a low of 2% on January 6.

Time Spent in Various Temperature Bands and the Growing Season in January

Time Spent in Various Temperature Bands and the Growing Season in January in White Rockgrowing season1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%DecFebJan 12%Jan 12%Jan 315%Jan 315%Jan 112%Jan 112%Jan 213%Jan 213%Feb 910%Feb 910%freezingvery coldcold
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.

The average accumulated growing degree days in White Rock are essentially constant during January, remaining within 2°F of 2°F throughout.

Growing Degree Days in January

The average growing degree days accumulated over the course of January, 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 in White Rock is gradually increasing during January, rising by 0.5 kWh, from 0.8 kWh to 1.3 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in January

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 White Rock are 49.016 deg latitude, -122.803 deg longitude, and 30 ft elevation.

The topography within 2 miles of White Rock contains only modest variations in elevation, with a maximum elevation change of 407 feet and an average elevation above sea level of 98 feet. Within 10 miles contains only modest variations in elevation (531 feet). Within 50 miles contains significant variations in elevation (10,768 feet).

The area within 2 miles of White Rock is covered by water (54%) and artificial surfaces (40%), within 10 miles by water (38%) and cropland (38%), and within 50 miles by trees (41%) and water (33%).

Data Sources

This report illustrates the typical weather in White Rock year round, 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 White Rock.

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

The stations contributing to this reconstruction are: White Rock Automatic Weather Reporting System (93%, 2.6 kilometers, east); Boundary Bay Airport (4.6%, 19 kilometers, northwest); and Saturna Island Meteorological Aeronautical Presentation System (2.3%, 31 kilometers, southwest).

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.