Average Weather at Olney-Noble Airport Illinois, United States
At Olney-Noble Airport, the summers are long, hot, and muggy; the winters are very cold and windy; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 24°F to 88°F and is rarely below 6°F or above 96°F.
Based on the tourism score, the best time of year to visit Olney-Noble Airport for warm-weather activities is from late May to late September.
The hot season lasts for 4.0 months, from May 22 to September 23, with an average daily high temperature above 78°F. The hottest day of the year is July 20, with an average high of 88°F and low of 68°F.
The cold season lasts for 3.0 months, from November 29 to February 28, with an average daily high temperature below 49°F. The coldest day of the year is January 23, with an average low of 24°F and high of 39°F.
Average High and Low Temperature
Average Hourly Temperature
Mahdishahr, Iran (6,745 miles away); Jabal os Saraj, Afghanistan (7,143 miles); and G‘azalkent, Uzbekistan (6,727 miles) are the far-away foreign places with temperatures most similar to Olney-Noble Airport (view comparison).
At Olney-Noble Airport, 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 at Olney-Noble Airport begins around June 14 and lasts for 4.5 months, ending around October 30. On August 23, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 70% of the time, and overcast or mostly cloudy 30% of the time.
The cloudier part of the year begins around October 30 and lasts for 7.5 months, ending around June 14. On February 12, the cloudiest day of the year, the sky is overcast or mostly cloudy 55% of the time, and clear, mostly clear, or partly cloudy 45% of the time.
Cloud Cover Categories
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days at Olney-Noble Airport varies throughout the year.
The wetter season lasts 4.7 months, from March 22 to August 14, with a greater than 29% chance of a given day being a wet day. The chance of a wet day peaks at 40% on June 8.
The drier season lasts 7.3 months, from August 14 to March 22. The smallest chance of a wet day is 19% on January 27.
Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 40% on June 8.
Daily Chance of Precipitation
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. Olney-Noble Airport experiences significant seasonal variation in monthly rainfall.
Rain falls throughout the year at Olney-Noble Airport. The most rain falls during the 31 days centered around May 2, with an average total accumulation of 4.3 inches.
The least rain falls around January 26, with an average total accumulation of 2.0 inches.
Average Monthly Rainfall
We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. Colder, drier snow tends to be on the higher end of that range and warmer, wetter snow on the lower end.
As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Olney-Noble Airport experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 3.6 months, from November 27 to March 15, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around January 20, with an average total liquid-equivalent accumulation of 0.4 inches.
The snowless period of the year lasts for 8.4 months, from March 15 to November 27. The least snow falls around July 23, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day at Olney-Noble Airport varies significantly over the course of the year. In 2018, the shortest day is December 21, with 9 hours, 27 minutes of daylight; the longest day is June 21, with 14 hours, 53 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:27 AM on June 14, and the latest sunrise is 1 hour, 55 minutes later at 7:21 AM on November 3. The earliest sunset is at 4:30 PM on December 7, and the latest sunset is 3 hours, 51 minutes later at 8:21 PM on June 28.
Daylight saving time (DST) is observed at Olney-Noble Airport during 2018, starting in the spring on March 11, lasting 7.8 months, and ending in the fall on November 4.
Sunrise & Sunset with Twilight and Daylight Saving Time
Olney-Noble Airport experiences extreme seasonal variation in the perceived humidity.
The muggier period of the year lasts for 4.2 months, from May 16 to September 24, during which time the comfort level is muggy, oppressive, or miserable at least 17% of the time. The muggiest day of the year is July 24, with muggy conditions 68% of the time.
The least muggy day of the year is January 17, when muggy conditions are essentially unheard of.
Humidity Comfort Levels
The average hourly wind speed at Olney-Noble Airport experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 7.5 months, from October 11 to May 26, with average wind speeds of more than 9.3 miles per hour. The windiest day of the year is April 1, with an average hourly wind speed of 11.9 miles per hour.
The calmer time of year lasts for 4.5 months, from May 26 to October 11. The calmest day of the year is July 31, with an average hourly wind speed of 6.6 miles per hour.
Average Wind Speed
The predominant average hourly wind direction at Olney-Noble Airport varies throughout the year.
The wind is most often from the south for 2.3 weeks, from February 17 to March 5 and for 9.5 months, from March 12 to December 27, with a peak percentage of 40% on June 6. The wind is most often from the north for 1.0 weeks, from March 5 to March 12, with a peak percentage of 30% on March 11. The wind is most often from the west for 1.6 months, from December 27 to February 17, with a peak percentage of 32% on January 1.
Best Time of Year to Visit
To characterize how pleasant the weather is at Olney-Noble Airport 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 Olney-Noble Airport for general outdoor tourist activities is from late May to late 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 Olney-Noble Airport for hot-weather activities is from mid June to early September, with a peak score in the last week of July.
The growing season at Olney-Noble Airport typically lasts for 6.6 months (202 days), from around April 7 to around October 26, rarely starting before March 20 or after April 25, and rarely ending before October 8 or after November 15.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms at Olney-Noble Airport should appear around March 22, only rarely appearing before March 7 or after April 8.
Growing Degree Days
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 4.2 months, from April 24 to August 30, with an average daily incident shortwave energy per square meter above 5.8 kWh. The brightest day of the year is July 2, with an average of 6.8 kWh.
The darker period of the year lasts for 3.0 months, from November 7 to February 8, with an average daily incident shortwave energy per square meter below 2.9 kWh. The darkest day of the year is December 18, with an average of 2.0 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Olney-Noble Airport are 38.719 deg latitude, -88.174 deg longitude, and 466 ft elevation.
The topography within 2 miles of Olney-Noble Airport contains only modest variations in elevation, with a maximum elevation change of 115 feet and an average elevation above sea level of 461 feet. Within 10 miles also contains only modest variations in elevation (207 feet). Within 50 miles also contains only modest variations in elevation (433 feet).
The area within 2 miles of Olney-Noble Airport is covered by cropland (99%), within 10 miles by cropland (91%), and within 50 miles by cropland (87%) and trees (11%).
This report illustrates the typical weather at Olney-Noble Airport, 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
Olney-Noble Airport has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required.
In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations.
The stations on which we may fall back include but are not limited to Flora Municipal Airport, Fairfield Municipal Airport, Mount Carmel Municipal Airport, Lawrenceville–Vincennes International Airport, Crawford County Airport, Carmi Municipal Airport, Coles County Memorial Airport, and Mount Vernon Airport.
Time zones for aiports and weather stations are provided by AskGeo.com .