Climate and Average Weather Year Round in Villa Grove United States

In Villa Grove, the summers are long, warm, and humid; the winters are freezing, snowy, and windy; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 20°F to 85°F and is rarely below 2°F or above 93°F.

Based on the tourism score, the best time of year to visit Villa Grove for warm-weather activities is from early June to mid September.

The hot season lasts for 4.2 months, from May 17 to September 23, with an average daily high temperature above 75°F. The hottest month of the year in Villa Grove is July, with an average high of 85°F and low of 66°F.

The cold season lasts for 3.0 months, from November 29 to February 29, with an average daily high temperature below 45°F. The coldest month of the year in Villa Grove is January, with an average low of 21°F and high of 35°F.

In Villa Grove, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.

The clearer part of the year in Villa Grove begins around June 13 and lasts for 4.5 months, ending around October 28.

The clearest month of the year in Villa Grove is August, during which on average the sky is clear, mostly clear, or partly cloudy 68% of the time.

The cloudier part of the year begins around October 28 and lasts for 7.5 months, ending around June 13.

The cloudiest month of the year in Villa Grove is January, during which on average the sky is overcast or mostly cloudy 56% of the time.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Villa Grove varies throughout the year.

The wetter season lasts 5.4 months, from March 24 to September 6, with a greater than 28% chance of a given day being a wet day. The month with the most wet days in Villa Grove is May, with an average of 12.1 days with at least 0.04 inches of precipitation.

The drier season lasts 6.5 months, from September 6 to March 24. The month with the fewest wet days in Villa Grove is January, with an average of 5.5 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. The month with the most days of rain alone in Villa Grove is May, with an average of 12.1 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 40% on May 20.

Rainfall

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. Villa Grove experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year in Villa Grove. The month with the most rain in Villa Grove is May, with an average rainfall of 3.9 inches.

The month with the least rain in Villa Grove is January, with an average rainfall of 1.4 inches.

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Villa Grove experiences significant seasonal variation in monthly snowfall.

The snowy period of the year lasts for 4.1 months, from November 20 to March 22, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Villa Grove is January, with an average snowfall of 3.9 inches.

The snowless period of the year lasts for 7.9 months, from March 22 to November 20. The least snow falls around July 21, with an average total accumulation of 0.0 inches.

The length of the day in Villa Grove varies significantly over the course of the year. In 2024, the shortest day is December 21, with 9 hours, 21 minutes of daylight; the longest day is June 20, with 15 hours, 0 minutes of daylight.

The earliest sunrise is at 5:23 AM on June 13, and the latest sunrise is 2 hours, 0 minutes later at 7:23 AM on November 2. The earliest sunset is at 4:27 PM on December 6, and the latest sunset is 3 hours, 58 minutes later at 8:25 PM on June 27.

Daylight saving time (DST) is observed in Villa Grove during 2024, starting in the spring on March 10, lasting 7.8 months, and ending in the fall on November 3.

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.

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.

Villa Grove experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 3.9 months, from May 24 to September 20, during which time the comfort level is muggy, oppressive, or miserable at least 15% of the time. The month with the most muggy days in Villa Grove is July, with 18.3 days that are muggy or worse.

The month with the fewest muggy days in Villa Grove is January, with 0.0 days that are muggy or worse.

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 Villa Grove experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 7.5 months, from October 9 to May 25, with average wind speeds of more than 9.9 miles per hour. The windiest month of the year in Villa Grove is March, with an average hourly wind speed of 12.4 miles per hour.

The calmer time of year lasts for 4.5 months, from May 25 to October 9. The calmest month of the year in Villa Grove is August, with an average hourly wind speed of 7.4 miles per hour.

The predominant average hourly wind direction in Villa Grove varies throughout the year.

The wind is most often from the south for 8.9 months, from March 6 to December 3, with a peak percentage of 38% on November 12. The wind is most often from the west for 3.1 months, from December 3 to March 6, with a peak percentage of 38% on January 1.

To characterize how pleasant the weather is in Villa Grove 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 Villa Grove for general outdoor tourist activities is from early June to mid September, with a peak score in the last week of August.

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 Villa Grove for hot-weather activities is from mid June to late August, with a peak score in the third week of July.

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 in Villa Grove typically lasts for 6.2 months (189 days), from around April 12 to around October 18, rarely starting before March 27 or after April 30, and rarely ending before September 29 or after November 6.

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 in Villa Grove should appear around March 31, only rarely appearing before March 17 or after April 16.

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 significant seasonal variation over the course of the year.

The brighter period of the year lasts for 4.0 months, from April 28 to August 28, with an average daily incident shortwave energy per square meter above 5.8 kWh. The brightest month of the year in Villa Grove is July, with an average of 6.7 kWh.

The darker period of the year lasts for 3.2 months, from November 4 to February 9, with an average daily incident shortwave energy per square meter below 2.9 kWh. The darkest month of the year in Villa Grove is December, with an average of 1.9 kWh.

For the purposes of this report, the geographical coordinates of Villa Grove are 39.863 deg latitude, -88.162 deg longitude, and 650 ft elevation.

The topography within 2 miles of Villa Grove is essentially flat, with a maximum elevation change of 33 feet and an average elevation above sea level of 652 feet. Within 10 miles is essentially flat (164 feet). Within 50 miles contains only modest variations in elevation (515 feet).

The area within 2 miles of Villa Grove is covered by cropland (91%), within 10 miles by cropland (99%), and within 50 miles by cropland (88%).