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Spring Weather in Calais France

Daily high temperatures increase by 16°F, from 47°F to 62°F, rarely falling below 39°F or exceeding 72°F.

Daily low temperatures increase by 13°F, from 38°F to 51°F, rarely falling below 30°F or exceeding 55°F.

For reference, on August 3, the hottest day of the year, temperatures in Calais typically range from 58°F to 70°F, while on February 8, the coldest day of the year, they range from 36°F to 45°F.

Average High and Low Temperature in the Spring in Calais

Average High and Low Temperature in the Spring in CalaisMarAprMay25°F25°F30°F30°F35°F35°F40°F40°F45°F45°F50°F50°F55°F55°F60°F60°F65°F65°F70°F70°F75°F75°FWinterSummerMar 147°FMar 147°F38°F38°FMay 3162°FMay 3162°F51°F51°FApr 152°FApr 152°F41°F41°FMay 158°FMay 158°F45°F45°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.

The figure below shows you a compact characterization of the hourly average spring temperatures. 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 the Spring in Calais

Average Hourly Temperature in the Spring in CalaisMarAprMay12 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 AMWinterSummerNowNowvery coldcoldcoolcomfortable
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.

Point Roberts, United States (4,811 miles away) is the far-away foreign place with temperatures most similar to Calais (view comparison).

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Compare Calais to another city:

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The spring in Calais experiences decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 59% to 50%.

The clearest day of the spring is May 31, with clear, mostly clear, or partly cloudy conditions 50% of the time.

For reference, on December 29, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 65%, while on July 20, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 59%.

Cloud Cover Categories in the Spring in Calais

Cloud Cover Categories in the Spring in CalaisMarAprMay0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%WinterSummerMar 141%Mar 141%May 3150%May 3150%Apr 147%Apr 147%May 148%May 148%NowNowclearmostly clearpartly 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.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Calais, the chance of a wet day over the course of the spring is gradually increasing, starting the season at 24% and ending it at 26%.

For reference, the year's highest daily chance of a wet day is 37% on November 22, and its lowest chance is 21% on April 20.

Probability of Precipitation in the Spring in Calais

Probability of Precipitation in the Spring in CalaisMarAprMay0%0%5%5%10%10%15%15%20%20%25%25%30%30%WinterSummerMay 2528%May 2528%Apr 2021%Apr 2021%Mar 124%Mar 124%Apr 125%Apr 125%NowNowrain
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 season and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during the spring in Calais is essentially constant, remaining about 1.4 inches throughout, and rarely exceeding 2.7 inches or falling below 0.3 inches.

The lowest average 31-day accumulation is 1.3 inches on April 18.

Average Monthly Rainfall in the Spring in Calais

Average Monthly Rainfall in the Spring in CalaisMarAprMay0.0 in0.0 in0.5 in0.5 in1.0 in1.0 in1.5 in1.5 in2.0 in2.0 in2.5 in2.5 in3.0 in3.0 in3.5 in3.5 inWinterSummerApr 171.3 inApr 171.3 inMar 11.3 inMar 11.3 inMay 311.6 inMay 311.6 inApr 11.3 inApr 11.3 inMay 11.3 inMay 11.3 inNowNow
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.

Over the course of the spring in Calais, the length of the day is very rapidly increasing. From the start to the end of the season, the length of the day increases by 5 hours, 15 minutes, implying an average daily increase of 3 minutes, 27 seconds, and weekly increase of 24 minutes, 12 seconds.

The shortest day of the spring is March 1, with 10 hours, 58 minutes of daylight and the longest day is May 31, with 16 hours, 13 minutes of daylight.

Hours of Daylight and Twilight in the Spring in Calais

Hours of Daylight and Twilight in the Spring in CalaisMarAprMay0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrWinterSummerMar 2012 hr, 8 minMar 2012 hr, 8 minnightnightdaydayMay 114 hr, 49 minMay 114 hr, 49 min
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 spring in Calais is 7:36 AM on March 1 and the earliest sunrise is 1 hour, 52 minutes earlier at 5:44 AM on May 31.

The earliest sunset is 6:34 PM on March 1 and the latest sunset is 3 hours, 23 minutes later at 9:57 PM on May 31.

Daylight saving time (DST) ends at 3:00 AM on March 31, 2024, shifting sunrise and sunset to be an hour earlier.

For reference, on June 20, the longest day of the year, the Sun rises at 5:38 AM and sets 16 hours, 32 minutes later, at 10:10 PM, while on December 21, the shortest day of the year, it rises at 8:53 AM and sets 7 hours, 55 minutes later, at 4:48 PM.

Sunrise & Sunset with Twilight and Daylight Saving Time in the Spring in Calais

Sunrise & Sunset with Twilight and Daylight Saving Time in the Spring in CalaisMarAprMay2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMWinterSummer5:44 AM5:44 AMMay 319:57 PMMay 319:57 PM7:36 AM7:36 AMMar 16:34 PMMar 16:34 PM7:27 AM7:27 AMApr 18:26 PMApr 18:26 PM6:25 AM6:25 AMMay 19:14 PMMay 19:14 PMMar 31DSTMar 31DSTSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day in the spring. 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 in the Spring in Calais

Solar Elevation and Azimuth in the Spring in CalaisMarAprMay12 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 AMWinterSummer0010203040500101020304060NowNow
northeastsouthwest
Solar elevation and azimuth in the the spring of 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 the spring of 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. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

Moon Rise, Set & Phases in the Spring in Calais

Moon Rise, Set & Phases in the Spring in CalaisMarAprMay12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMWinterSummerFeb 1012:00 AMFeb 1012:00 AMFeb 241:31 PMFeb 241:31 PMMar 1010:01 AMMar 1010:01 AMMar 258:01 AMMar 258:01 AMApr 88:22 PMApr 88:22 PMApr 241:50 AMApr 241:50 AMMay 85:23 AMMay 85:23 AMMay 233:54 PMMay 233:54 PMJun 62:38 PMJun 62:38 PMJun 223:09 AMJun 223:09 AM8:35 AM8:35 AM5:08 PM5:08 PM6:20 PM6:20 PM8:24 AM8:24 AM7:34 AM7:34 AM7:09 PM7:09 PM6:28 PM6:28 PM6:53 AM6:53 AM7:06 AM7:06 AM8:33 PM8:33 PM8:48 PM8:48 PM6:36 AM6:36 AM6:00 AM6:00 AM10:32 PM10:32 PM5:46 AM5:46 AM10:51 PM10:51 PM5:12 AM5:12 AM
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 chance that a given day will be muggy in Calais is essentially constant during the spring, remaining around 0% throughout.

For reference, on August 10, 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 the Spring in Calais

Humidity Comfort Levels in the Spring in CalaisMarAprMay0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%WinterSummerMar 10%Mar 10%May 310%May 310%Apr 10%Apr 10%May 10%May 10%comfortablecomfortabledrydryhumidhumid
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.

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 Calais is rapidly decreasing during the spring, decreasing from 14.9 miles per hour to 11.3 miles per hour over the course of the season.

For reference, on January 1, the windiest day of the year, the daily average wind speed is 17.4 miles per hour, while on August 3, the calmest day of the year, the daily average wind speed is 10.9 miles per hour.

Average Wind Speed in the Spring in Calais

Average Wind Speed in the Spring in CalaisMarAprMay0 mph0 mph5 mph5 mph10 mph10 mph15 mph15 mph20 mph20 mph25 mph25 mphWinterSummerMar 114.9 mphMar 114.9 mphMay 3111.3 mphMay 3111.3 mphApr 113.6 mphApr 113.6 mphMay 112.3 mphMay 112.3 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The wind direction in Calais during the spring is predominantly out of the west from March 1 to April 17 and from May 11 to May 31 and the north from April 17 to May 11.

Wind Direction in the Spring in Calais

Wind Direction in the Spring in CalaisWNWMarAprMay0%100%20%80%40%60%60%40%80%20%100%0%WinterSummerNowNowwestsoutheastnorth
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).

Calais 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 Calais is rapidly increasing during the spring, rising by 10°F, from 45°F to 55°F, over the course of the season.

Average Water Temperature in the Spring in Calais

Average Water Temperature in the Spring in CalaisMarAprMay40°F40°F45°F45°F50°F50°F55°F55°F60°F60°FWinterSummerMar 145°FMar 145°FMay 3155°FMay 3155°FApr 146°FApr 146°FMay 150°FMay 150°FNowNow
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

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 Calais typically lasts for 8.7 months (265 days), from around March 14 to around December 4, rarely starting before February 8 or after April 11, and rarely ending before November 2 or after December 29.

During the spring in Calais, the chance that a given day is within the growing season is very rapidly increasing rising from 32% to 100% over the course of the season.

Time Spent in Various Temperature Bands and the Growing Season in the Spring in Calais

Time Spent in Various Temperature Bands and the Growing Season in the Spring in Calaisgrowing seasonMarAprMay0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%WinterSummerMar 132%Mar 132%100%May 31100%May 3178%Apr 178%Apr 199%May 199%May 1Feb 810%Feb 810%May 20100%May 20100%NowNowfreezingvery coldcoldcoolwarm
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.

The average accumulated growing degree days in Calais are increasing during the spring, increasing by 236°F, from 11°F to 247°F, over the course of the season.

Growing Degree Days in the Spring in Calais

Growing Degree Days in the Spring in CalaisMarAprMay50°F50°F100°F100°F150°F150°F200°F200°F250°F250°F300°F300°FWinterSummerMar 111°FMar 111°FMay 31247°FMay 31247°FApr 130°FApr 130°FMay 191°FMay 191°FNowNow
The average growing degree days accumulated over the course of the spring, 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 in Calais is very rapidly increasing during the spring, rising by 3.9 kWh, from 2.4 kWh to 6.3 kWh, over the course of the season.

Average Daily Incident Shortwave Solar Energy in the Spring in Calais

Average Daily Incident Shortwave Solar Energy in the Spring in CalaisMarAprMay0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhWinterSummerMar 12.4 kWhMar 12.4 kWhMay 316.3 kWhMay 316.3 kWhApr 13.9 kWhApr 13.9 kWhMay 15.4 kWhMay 15.4 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.

For the purposes of this report, the geographical coordinates of Calais are 50.952 deg latitude, 1.856 deg longitude, and 20 ft elevation.

The topography within 2 miles of Calais is essentially flat, with a maximum elevation change of 69 feet and an average elevation above sea level of 10 feet. Within 10 miles is essentially flat (623 feet). Within 50 miles also contains significant variations in elevation (771 feet).

The area within 2 miles of Calais is covered by artificial surfaces (74%) and cropland (12%), within 10 miles by water (42%) and cropland (40%), and within 50 miles by water (54%) and cropland (31%).

This report illustrates the typical weather in Calais, 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 Calais.

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

The stations contributing to this reconstruction are:

To get a sense of how much these sources agree with each other, you can view a comparison of Calais and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data.

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.

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