January Weather at Perugia San Francesco d'Assisi – Umbria International Airport Italy

Daily high temperatures are around 48°F, rarely falling below 40°F or exceeding 56°F. The lowest daily average high temperature is 48°F on January 7.

Daily low temperatures are around 33°F, rarely falling below 24°F or exceeding 44°F. The lowest daily average low temperature is 33°F on January 15.

For reference, on August 3, the hottest day of the year, temperatures at Perugia San Francesco d'Assisi – Umbria International Airport typically range from 62°F to 88°F, while on January 15, the coldest day of the year, they range from 33°F to 48°F.

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.

Tuolumne City, United States (6,108 miles away) is the far-away foreign place with temperatures most similar to Perugia San Francesco d'Assisi – Umbria International Airport (view comparison).

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The month of January at Perugia San Francesco d'Assisi – Umbria International Airport experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 51% throughout the month. The highest chance of overcast or mostly cloudy conditions is 53% on January 16.

The clearest day of the month is January 30, with clear, mostly clear, or partly cloudy conditions 51% of the time.

For reference, on January 16, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 53%, while on July 20, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 85%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At Perugia San Francesco d'Assisi – Umbria International Airport, the chance of a wet day over the course of January is essentially constant, remaining around 19% throughout.

For reference, the year's highest daily chance of a wet day is 32% on November 15, and its lowest chance is 13% on August 3.

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 at Perugia San Francesco d'Assisi – Umbria International Airport is essentially constant, remaining about 1.6 inches throughout, and rarely exceeding 3.4 inches or falling below 0.2 inches.

The lowest average 31-day accumulation is 1.5 inches on January 15.

Over the course of January at Perugia San Francesco d'Assisi – Umbria International Airport, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 50 minutes, implying an average daily increase of 1 minute, 39 seconds, and weekly increase of 11 minutes, 36 seconds.

The shortest day of the month is January 1, with 9 hours, 4 minutes of daylight and the longest day is January 31, with 9 hours, 53 minutes of daylight.

The latest sunrise of the month at Perugia San Francesco d'Assisi – Umbria International Airport is 7:41 AM on January 4 and the earliest sunrise is 15 minutes earlier at 7:26 AM on January 31.

The earliest sunset is 4:45 PM on January 1 and the latest sunset is 35 minutes later at 5:20 PM on January 31.

Daylight saving time is observed at Perugia San Francesco d'Assisi – Umbria International Airport during 2024, but it neither starts nor ends during January, so the entire month is in daylight saving time.

For reference, on June 20, the longest day of the year, the Sun rises at 5:30 AM and sets 15 hours, 23 minutes later, at 8:52 PM, while on December 21, the shortest day of the year, it rises at 7:38 AM and sets 9 hours, 0 minutes later, at 4:38 PM.

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.

The figure below presents a compact representation of key lunar data for January 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.

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 at Perugia San Francesco d'Assisi – Umbria International Airport is essentially constant during January, remaining around 0% throughout.

For reference, on August 6, the muggiest day of the year, there are muggy conditions 15% of the time, while on November 16, the least muggy day of the year, there are muggy conditions 0% of the time.

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 Perugia San Francesco d'Assisi – Umbria International Airport is essentially constant during January, remaining within 0.2 miles per hour of 8.4 miles per hour throughout.

For reference, on February 24, the windiest day of the year, the daily average wind speed is 8.8 miles per hour, while on August 10, the calmest day of the year, the daily average wind speed is 6.7 miles per hour.

The hourly average wind direction at Perugia San Francesco d'Assisi – Umbria International Airport throughout January is predominantly from the east, with a peak proportion of 38% on January 11.

Perugia San Francesco d'Assisi – Umbria International Airport 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 at Perugia San Francesco d'Assisi – Umbria International Airport is gradually decreasing during January, falling by 3°F, from 56°F to 53°F, over the course of the month.

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 Perugia San Francesco d'Assisi – Umbria International Airport typically lasts for 7.8 months (240 days), from around March 24 to around November 19, rarely starting before March 1 or after April 16, and rarely ending before October 31 or after December 13.

The month of January at Perugia San Francesco d'Assisi – Umbria International Airport is reliably fully outside of 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 at Perugia San Francesco d'Assisi – Umbria International Airport are essentially constant during January, remaining within 5°F of 6°F throughout.

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 at Perugia San Francesco d'Assisi – Umbria International Airport is gradually increasing during January, rising by 0.6 kWh, from 1.6 kWh to 2.3 kWh, over the course of the month.

For the purposes of this report, the geographical coordinates of Perugia San Francesco d'Assisi – Umbria International Airport are 43.096 deg latitude, 12.513 deg longitude, and 669 ft elevation.

The topography within 2 miles of Perugia San Francesco d'Assisi – Umbria International Airport contains only modest variations in elevation, with a maximum elevation change of 325 feet and an average elevation above sea level of 684 feet. Within 10 miles contains only modest variations in elevation (3,704 feet). Within 50 miles also contains extreme variations in elevation (7,982 feet).

The area within 2 miles of Perugia San Francesco d'Assisi – Umbria International Airport is covered by cropland (86%) and artificial surfaces (13%), within 10 miles by cropland (64%) and trees (24%), and within 50 miles by cropland (49%) and trees (40%).