Weather in Antwerp Belgium

Belgium Weather / July 21, 2017

The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on May. 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 May

The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < chilly < 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.

The month of May in Antwerpen experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 52% throughout the month.

The clearest day of the month is May 30, with clear, mostly clear, or partly cloudy conditions 49% of the time.

For reference, on December 27, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 72%, while on July 22, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 58%.

Cloud Cover in May

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.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Antwerpen, the chance of a wet day over the course of May is rapidly increasing, starting the month at 23% and ending it at 31%.

For reference, the year's highest daily chance of a wet day is 34% on December 22, and its lowest chance is 22% on April 24.

Probability of Precipitation in May

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 May in Antwerpen is increasing, starting the month at 1.3 inches, when it rarely exceeds 2.4 inches or falls below 0.5 inches, and ending the month at 1.9 inches, when it rarely exceeds 3.0 inches or falls below 0.8 inches.

Average Monthly Rainfall in May

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.

Over the course of May in Antwerpen, 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, 25 minutes, implying an average daily increase of 2 minutes, 49 seconds, and weekly increase of 19 minutes, 46 seconds.

The shortest day of the month is May 1, with 14 hours, 50 minutes of daylight and the longest day is May 31, with 16 hours, 15 minutes of daylight.

Hours of Daylight and Twilight in May

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 Antwerpen is 6:15 AM on May 1 and the earliest sunrise is 42 minutes earlier at 5:33 AM on May 31.

The earliest sunset is 9:04 PM on May 1 and the latest sunset is 43 minutes later at 9:47 PM on May 31.

Daylight saving time is observed in Antwerpen during 2017, but it neither starts nor ends during May, so the entire month is in daylight saving time.

For reference, on June 21, the longest day of the year, the Sun rises at 5:26 AM and sets 16 hours, 35 minutes later, at 10:01 PM, while on December 21, the shortest day of the year, it rises at 8:44 AM and sets 7 hours, 53 minutes later, at 4:36 PM.

Sunrise & Sunset with Twilight in May

The solar day over the course of May. 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.

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 Antwerpen is essentially constant during May, remaining around 0% throughout.

For reference, on July 26, the muggiest day of the year, there are muggy conditions 4% of the time, while on January 1, the leasy muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in May

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.

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 Antwerpen is essentially constant during May, remaining within 0.1 miles per hour of 5.2 miles per hour throughout.

For reference, on January 7, the windiest day of the year, the daily average wind speed is 7.1 miles per hour, while on August 4, the calmest day of the year, the daily average wind speed is 4.8 miles per hour.

The lowest daily average wind speed during May is 5.1 miles per hour on May 31.

Average Wind Speed in May

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The wind direction in Antwerpen during May is predominantly out of the north from May 1 to May 2 and the west from May 2 to May 31.

Wind Direction in May

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).

Antwerpen 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 Antwerpen is increasing during May, rising by 6°F, from 50°F to 56°F, over the course of the month.