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Average Weather On March 20 For Madison, Wisconsin, USA

Location

This report describes the typical weather at the Dane County Regional Airport (Madison, Wisconsin, United States) weather station over the course of an average March 20. It is based on the historical records from 1974 to 2012. Earlier records are either unavailable or unreliable.

Madison, Wisconsin has a humid continental climate with hot summers and no dry season. The area within 25 mi of this station is covered by grasslands (49%), croplands (45%), and lakes and rivers (3%).

Temperature

The temperature typically varies from 30°F to 44°F and is rarely below 17°F or above 59°F.

Temperature

Average hourly temperature (black) with percentil bands (inner band from 25th to 75th percentile, outer band from 10th to 90th percentile).

The coolest hours of the day are from 1am to 8am with the coldest at 6am, at which time the temperature is below 36°F three days out of four.

The warmest hours of the day are from noon to 6pm with the hottest at 3pm, at which time the temperature is above 36°F three days out of four.

The day has gained half its heat by 10am and lost it again by 9pm.

Temperature Bands

The average fraction of time spent in various temperature bands: frigid (below 15°F), freezing (15°F to 32°F), cold (32°F to 50°F), cool (50°F to 65°F), comfortable (65°F to 75°F), warm (75°F to 85°F), hot (85°F to 100°F) and sweltering (above 100°F).
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March 2017
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April 2017
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May 2017
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June 2017
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July 2017
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August 2017
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September 2017
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October 2017
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November 2017
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December 2017
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January 2018
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February 2018
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Sun

On March 20 the Sun rises at 6:59am and sets at 7:10pm.

Solar noon is at 1:04pm.

For reference, on the longest day of the year the Sun rises at 5:17am and sets at 8:40pm, while on the shortest day of the year it rises at 7:25am and sets at 4:25pm.

Astronomical twilight begins and ends 95 minutes before sunrise and after sunset at 5:24am and 8:45pm, respectively.

Nautical twilight begins and ends 61 minutes before sunrise and after sunset at 5:58am and 8:12pm, respectively.

Civil twilight begins and ends 28 minutes before sunrise and after sunset at 6:31am and 7:38pm, respectively.

Solar twilight begins and ends 37 minutes after sunrise and before sunset at 7:37am and 6:32pm, respectively.

Solar Elevation

Elevation of the Sun above (positive) or below (negative) the horizon (black line). Yellow and gray fills indicate day and night, respectively. Light gray lines are the corresponding curves for the winter and summer equinoxes.

Clouds

The median cloud cover is 78% (partly cloudy) and does not vary substantially over the course of the day.

On average, the sky is clear or mostly clear 38% of the time, partly cloudy 9% of the time, and mostly cloudy or overcast 52% of the time.

Median Cloud Cover

Median hourly cloud coverage fraction (black line) with percentile bands (inner band from 40th to 60th percentile, outer band from 25th to 75th percentile).

Cloud Cover Types

The fraction of time spent in each of the five sky cover categories. From top (most blue) to bottom (most gray), the categories are clear, mostly clear, partly cloudy, mostly cloudy, and overcast. Pink indicates missing data. Outside the United States clear skies are often reported ambiguously, leading them to be lumped in with the missing data.

Precipitation

There is a 53% chance that precipitation will be observed at some point during the day.

The average measured liquid-equivalent quantity of precipitation is 0.065". Among only those days for which there is at least some measured precipitation, the average is 0.196" and the total rarely exceeds 0.437".

Probability of Precipitation

The fraction of days in which various types of precipitation are observed. If more than one type of precipitation is reported in a given day, the more severe precipitation is counted. For example, if light rain is observed in the same day as a thunderstorm, that day counts towards the thunderstorm totals. The order of severity is from the top down in this graph, with the most severe at the bottom.

When precipitation does occur it is most often in the form of slight snow (39% of days with precipitation have at worst slight snow), slight rain (20%), moderate rain (12%), thunderstorms (12%), and moderate snow (10%).

Precipitation is observed with more or less equal probability throughout the day.

Types of Precipitation

Relative frequency of various types of precipitation over the course of a typical March 20.

Snow

There is a 29% chance that there will be snow on the ground. The average snow depth is 1.5". The snow depth is deeper than 3.0" one year in four and deeper than 4.7" one year in ten.

Humidity

The relative humidity typically ranges from 56% (mildly humid) to 80% (humid), rarely dropping below 34% (comfortable), or exceeding 94% (very humid).

The air is driest at 3pm, at which time the relative humidity is less than 69% (mildly humid) three days out of four; it is most humid at 5am, exceeding 72% (humid) three days out of four.

Relative Humidity

Average hourly humidity (black line) with percentile bands (inner bands from 25th to 75th percentile, outer bands from 10th to 90th percentile).

Dew Point

The dew point ranges from 25°F to 27°F with an average of 27°F.

For reference, comfortable indoor conditions should have a relative humidity between 30% and 50% with a dew point of less than 65°F.

Dew Point

Average hourly dew point (black line) with percentile bands (inner bands from 25th to 75th percentile, outer bands from 10th to 90th percentile).

Wind

Sustained wind speeds typically vary from 8 mph to 13 mph (gentle breeze to moderate breeze) over the course of the day.

The peak sustained wind speed typically occurs around 2pm and is rarely outside the range 7 mph to 19 mph (light breeze to fresh breeze).

The wind is most calm around 4am, rarely exceeding 15 mph (moderate breeze).

Wind Speed

Average hourly wind speed (black line) with percentile bands (inner bands from 25th to 75th percentile, outer bands from 10th to 90th percentile).

The wind is most often out of the north west (17% of the time), south (15% of the time), north east (12% of the time), and north (11% of the time).

Wind Directions

The fraction of time spent with the wind blowing from the various directions over the entire day. Values do not sum to 100% because the wind direction is undefined when the wind speed is zero.

Wind Directions Over Day

The fraction of time spent with the wind blowing from the various directions on an hourly basis. Values do not sum to 100% because the wind direction is undefined when the wind speed is zero.