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Climate and Average Weather Year Round at Dease Lake B. C. Canada

At Dease Lake B. C., the summers are cool and mostly cloudy and the winters are frigid, snowy, and overcast. Over the course of the year, the temperature typically varies from -3°F to 67°F and is rarely below -29°F or above 78°F.

Based on the tourism score, the best time of year to visit Dease Lake B. C. for warm-weather activities is from early July to early August.

Climate at Dease Lake B. C.

frigidfreezingvery coldcoldcoolcoolcoldfreezingJanFebMarAprMayJunJulAugSepOctNovDecNowNow40%40%24%24%overcastclearprecipitation: 3.0 inprecipitation: 3.0 in0.8 in0.8 inmuggy: 0%muggy: 0%drydrytourism score: 2.1tourism score: 2.10.00.0
Dease Lake B. C. weather by month. Click on each chart for more information.

The warm season lasts for 3.7 months, from May 18 to September 9, with an average daily high temperature above 56°F. The hottest month of the year at Dease Lake B. C. is July, with an average high of 66°F and low of 45°F.

The cold season lasts for 3.0 months, from November 15 to February 16, with an average daily high temperature below 23°F. The coldest month of the year at Dease Lake B. C. is January, with an average low of -1°F and high of 15°F.

Average High and Low Temperature at Dease Lake B. C.

Average High and Low Temperature at Dease Lake B. C.warmcoldcoldJanFebMarAprMayJunJulAugSepOctNovDec-20°F-20°F0°F0°F20°F20°F40°F40°F60°F60°F80°F80°F100°F100°FDec 3012°FDec 3012°FJul 3067°FJul 3067°F-3°F-3°F45°F45°FMay 1856°FMay 1856°FSep 956°FSep 956°FFeb 1623°FFeb 1623°F34°F34°F37°F37°F10°F10°F3°F3°FNowNow
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.
AverageJanFebMarAprMayJunJulAugSepOctNovDec
High 15°F23°F33°F43°F55°F63°F66°F63°F54°F40°F23°F14°F
Temp. 6°F11°F20°F33°F43°F52°F55°F52°F44°F33°F16°F6°F
Low -1°F3°F11°F24°F33°F41°F45°F43°F36°F26°F10°F-0°F

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 Dease Lake B. C.

Average Hourly Temperature at Dease Lake B. C.JanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMNowNowfrigidfrigidfreezingfreezingvery coldvery coldcoldcool
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.

Pajala, Sweden (3,655 miles away) and Borovoy, Russia (4,035 miles) are the far-away foreign places with temperatures most similar to Dease Lake B. C. (view comparison).

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Compare Dease Lake B. C. to another city:

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At Dease Lake B. C., the average percentage of the sky covered by clouds experiences mild seasonal variation over the course of the year.

The clearer part of the year at Dease Lake B. C. begins around April 10 and lasts for 5.0 months, ending around September 12.

The clearest month of the year at Dease Lake B. C. is May, during which on average the sky is clear, mostly clear, or partly cloudy 39% of the time.

The cloudier part of the year begins around September 12 and lasts for 7.0 months, ending around April 10.

The cloudiest month of the year at Dease Lake B. C. is December, during which on average the sky is overcast or mostly cloudy 74% of the time.

Cloud Cover Categories at Dease Lake B. C.

Cloud Cover Categories at Dease Lake B. C.clearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%May 2440%May 2440%Nov 2924%Nov 2924%Apr 1032%Apr 1032%Sep 1232%Sep 1232%NowNowclearmostly clearpartly cloudymostly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.
FractionJanFebMarAprMayJunJulAugSepOctNovDec
Cloudier 73%72%70%67%61%62%63%63%68%72%74%74%
Clearer 27%28%30%33%39%38%37%37%32%28%26%26%

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days at Dease Lake B. C. varies significantly throughout the year.

The wetter season lasts 7.8 months, from May 30 to January 22, with a greater than 30% chance of a given day being a wet day. The month with the most wet days at Dease Lake B. C. is September, with an average of 13.2 days with at least 0.04 inches of precipitation.

The drier season lasts 4.2 months, from January 22 to May 30. The month with the fewest wet days at Dease Lake B. C. is April, with an average of 5.1 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 Dease Lake B. C. changes throughout the year.

Rain alone is the most common for 6.6 months, from April 8 to October 26. The month with the most days of rain alone at Dease Lake B. C. is September, with an average of 12.6 days.

Snow alone is the most common for 5.0 months, from October 26 to March 28. The month with the most days of snow alone at Dease Lake B. C. is December, with an average of 9.0 days.

Mixed snow and rain is the most common for 1.6 weeks, from March 28 to April 8. The month with the most days of mixed snow and rain at Dease Lake B. C. is October, with an average of 3.1 days.

Daily Chance of Precipitation at Dease Lake B. C.

Daily Chance of Precipitation at Dease Lake B. C.snowrainsnowJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Oct 246%Oct 246%Apr 1315%Apr 1315%May 3030%May 3030%Jan 2230%Jan 2230%NowNowsnowrainmixed
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).
Days ofJanFebMarAprMayJunJulAugSepOctNovDec
Rain 0.2d0.2d0.8d2.7d7.1d10.2d12.0d11.7d12.6d7.8d1.1d0.3d
Mixed 0.9d0.9d1.7d1.7d0.7d0.0d0.0d0.0d0.5d3.1d2.2d1.0d
Snow 8.5d6.0d3.4d0.7d0.1d0.0d0.0d0.0d0.1d2.4d7.7d9.0d
Any 9.5d7.1d5.9d5.1d8.0d10.2d12.0d11.7d13.2d13.4d11.0d10.3d

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. Dease Lake B. C. experiences significant seasonal variation in monthly rainfall.

The rainy period of the year lasts for 7.1 months, from April 11 to November 14, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain at Dease Lake B. C. is September, with an average rainfall of 3.0 inches.

The rainless period of the year lasts for 4.9 months, from November 14 to April 11. The month with the least rain at Dease Lake B. C. is February, with an average rainfall of 0.1 inches.

Average Monthly Rainfall at Dease Lake B. C.

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.
JanFebMarAprMayJunJulAugSepOctNovDec
Rainfall 0.1″0.1″0.2″0.6″1.4″2.3″2.8″2.6″3.0″1.9″0.5″0.1″

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Dease Lake B. C. experiences extreme seasonal variation in monthly snowfall.

The snowy period of the year lasts for 7.6 months, from September 22 to May 8, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow at Dease Lake B. C. is January, with an average snowfall of 17.0 inches.

The snowless period of the year lasts for 4.4 months, from May 8 to September 22. The least snow falls around July 18, with an average total accumulation of 0.0 inches.

Average Monthly Snowfall at Dease Lake B. C.

Average Monthly Snowfall at Dease Lake B. C.snowsnowJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in5 in5 in10 in10 in15 in15 in20 in20 in25 in25 in30 in30 in35 in35 inJan 1217.1 inJan 1217.1 inJul 180.0 inJul 180.0 inSep 221.0 inSep 221.0 inMay 81.0 inMay 81.0 inNowNow
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.
JanFebMarAprMayJunJulAugSepOctNovDec
Snowfall 17.0″11.8″6.9″2.6″0.7″0.0″0.0″0.0″0.4″6.9″15.2″16.6″

The length of the day at Dease Lake B. C. varies extremely over the course of the year. In 2024, the shortest day is December 21, with 6 hours, 21 minutes of daylight; the longest day is June 20, with 18 hours, 19 minutes of daylight.

Hours of Daylight and Twilight at Dease Lake B. C.

Hours of Daylight and Twilight at Dease Lake B. C.JanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 11 minMar 1912 hr, 11 minMar 1918 hr, 19 minJun 2018 hr, 19 minJun 2012 hr, 16 minSep 2212 hr, 16 minSep 226 hr, 21 minDec 216 hr, 21 minDec 21nightnightdayNowNow
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.
Hours ofJanFebMarAprMayJunJulAugSepOctNovDec
Daylight 7.2h9.4h11.9h14.5h16.9h18.2h17.4h15.3h12.7h10.2h7.8h6.5h

The earliest sunrise is at 4:32 AM on June 18, and the latest sunrise is 4 hours, 57 minutes later at 9:29 AM on December 27. The earliest sunset is at 3:46 PM on December 14, and the latest sunset is 7 hours, 4 minutes later at 10:51 PM on June 23.

Daylight saving time (DST) is observed at Dease Lake B. C. 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 Dease Lake B. C.

Sunrise & Sunset with Twilight and Daylight Saving Time at Dease Lake B. C.JanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 184:32 AMJun 184:32 AM10:51 PMJun 2310:51 PMJun 23Dec 143:46 PMDec 143:46 PM9:29 AMDec 279:29 AMDec 27Mar 10DSTMar 10DSTDSTNov 3DSTNov 3daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
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 Dease Lake B. C.

Solar Elevation and Azimuth at Dease Lake B. C.JanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AM00010101010202030304040500001010102020203030404050855NowNow
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).

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.

Moon Rise, Set & Phases at Dease Lake B. C.

The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.

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 Dease Lake B. C., 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 at Dease Lake B. C.

Humidity Comfort Levels at Dease Lake B. C.JanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jul 20%Jul 20%NowNowdrydry
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.
JanFebMarAprMayJunJulAugSepOctNovDec
Muggy days 0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d

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 Dease Lake B. C. experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 6.2 months, from October 10 to April 17, with average wind speeds of more than 5.3 miles per hour. The windiest month of the year at Dease Lake B. C. is January, with an average hourly wind speed of 6.4 miles per hour.

The calmer time of year lasts for 5.8 months, from April 17 to October 10. The calmest month of the year at Dease Lake B. C. is July, with an average hourly wind speed of 4.2 miles per hour.

Average Wind Speed at Dease Lake B. C.

Average Wind Speed at Dease Lake B. C.windywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph1 mph1 mph2 mph2 mph3 mph3 mph4 mph4 mph5 mph5 mph6 mph6 mph7 mph7 mph8 mph8 mph9 mph9 mph10 mph10 mphJan 146.5 mphJan 146.5 mphJul 224.1 mphJul 224.1 mphOct 105.3 mphOct 105.3 mphApr 175.3 mphApr 175.3 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
JanFebMarAprMayJunJulAugSepOctNovDec
Wind Speed (mph) 6.46.36.25.44.64.44.24.34.85.46.06.4

The predominant average hourly wind direction at Dease Lake B. C. varies throughout the year.

The wind is most often from the south for 1.9 weeks, from January 18 to January 31; for 2.3 months, from March 15 to May 25; and for 3.8 months, from August 25 to December 19, with a peak percentage of 54% on October 4. The wind is most often from the east for 1.5 months, from January 31 to March 15 and for 4.3 weeks, from December 19 to January 18, with a peak percentage of 45% on February 4. The wind is most often from the west for 3.0 months, from May 25 to August 25, with a peak percentage of 55% on July 17.

Wind Direction at Dease Lake B. C.

Wind Direction at Dease Lake B. C.ESESWSEJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwestsoutheastnorth
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).

To characterize how pleasant the weather is at Dease Lake B. C. 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 Dease Lake B. C. for general outdoor tourist activities is from early July to early August, with a peak score in the last week of July.

Tourism Score at Dease Lake B. C.

Tourism Score at Dease Lake B. C.JanFebMarAprMayJunJulAugSepOctNovDec002244668810102.12.10.00.0NowNow cloudscloudsprecipitationprecipitation
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 Dease Lake B. C. for hot-weather activities is from late July to early August.

Beach/Pool Score at Dease Lake B. C.

Beach/Pool Score at Dease Lake B. C.JanFebMarAprMayJunJulAugSepOctNovDec002244668810100.30.30.00.0NowNow cloudscloudsprecipitationprecipitation
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.

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 Dease Lake B. C. typically lasts for 2.7 months (82 days), from around June 8 to around August 30, rarely starting before May 21 or after June 28, and rarely ending before August 10 or after September 17.

Time Spent in Various Temperature Bands and the Growing Season at Dease Lake B. C.

Time Spent in Various Temperature Bands and the Growing Season at Dease Lake B. C.JanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jun 850%Jun 850%Aug 3050%Aug 3050%Jun 2890%Jun 2890%Aug 1090%Aug 1090%May 2110%May 2110%Sep 1710%Sep 1710%0%Mar 10%Mar 1Jul 17100%Jul 17100%NowNowfrigidfreezingvery coldcoldcool
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 Dease Lake B. C. should appear around June 9, only rarely appearing before May 25 or after June 25.

Growing Degree Days at Dease Lake B. C.

Growing Degree Days at Dease Lake B. C.JanFebMarAprMayJunJulAugSepOctNovDec0°F0°F100°F100°F200°F200°F300°F300°F400°F400°F500°F500°F600°F600°F700°F700°FJun 990°FJun 990°FDec 31555°FDec 31555°FNowNow
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

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 3.6 months, from April 21 to August 8, with an average daily incident shortwave energy per square meter above 4.8 kWh. The brightest month of the year at Dease Lake B. C. is June, with an average of 5.8 kWh.

The darker period of the year lasts for 4.0 months, from October 16 to February 18, with an average daily incident shortwave energy per square meter below 1.4 kWh. The darkest month of the year at Dease Lake B. C. is December, with an average of 0.3 kWh.

Average Daily Incident Shortwave Solar Energy at Dease Lake B. C.

Average Daily Incident Shortwave Solar Energy at Dease Lake B. C.brightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhJun 115.9 kWhJun 115.9 kWhDec 210.3 kWhDec 210.3 kWhApr 214.8 kWhApr 214.8 kWhAug 84.8 kWhAug 84.8 kWhOct 161.4 kWhOct 161.4 kWhFeb 181.4 kWhFeb 181.4 kWhNowNow
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.
JanFebMarAprMayJunJulAugSepOctNovDec
Solar Energy (kWh) 0.51.32.84.55.65.85.44.42.81.40.60.3

For the purposes of this report, the geographical coordinates of Dease Lake B. C. are 58.417 deg latitude, -130.000 deg longitude, and 2,592 ft elevation.

The topography within 2 miles of Dease Lake B. C. contains very significant variations in elevation, with a maximum elevation change of 945 feet and an average elevation above sea level of 2,753 feet. Within 10 miles contains very significant variations in elevation (2,707 feet). Within 50 miles contains large variations in elevation (7,267 feet).

The area within 2 miles of Dease Lake B. C. is covered by trees (88%), within 10 miles by trees (85%), and within 50 miles by trees (66%) and shrubs (13%).

This report illustrates the typical weather at Dease Lake B. C., 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

Dease Lake B. C. 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 Dease Lake Coastal Station and Dease Lake Airport.

Other Data

All 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.

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.

Please review our full terms contained on our Terms of Service page.