Average Weather in Cambria Illinois, United States
In Cambria, the summers are hot and muggy; the winters are very cold, wet, and windy; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 26°F to 89°F and is rarely below 10°F or above 96°F.
Based on the tourism score, the best times of year to visit Cambria for warm-weather activities are from late May to late June and from late July to late September.
The hot season lasts for 3.8 months, from May 26 to September 19, with an average daily high temperature above 80°F. The hottest day of the year is July 21, with an average high of 89°F and low of 70°F.
The cold season lasts for 3.0 months, from November 28 to February 28, with an average daily high temperature below 52°F. The coldest day of the year is January 22, with an average low of 26°F and high of 42°F.
Average High and Low Temperature
The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, 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 Cambria, 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 Cambria begins around June 16 and lasts for 4.5 months, ending around October 31. On August 23, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 71% of the time, and overcast or mostly cloudy 29% of the time.
The cloudier part of the year begins around October 31 and lasts for 7.5 months, ending around June 16. On December 28, the cloudiest day of the year, the sky is overcast or mostly cloudy 53% of the time, and clear, mostly clear, or partly cloudy 47% of the time.
Cloud Cover Categories
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Cambria varies throughout the year.
The wetter season lasts 4.8 months, from March 21 to August 15, with a greater than 30% chance of a given day being a wet day. The chance of a wet day peaks at 40% on May 12.
The drier season lasts 7.2 months, from August 15 to March 21. The smallest chance of a wet day is 19% on January 28.
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 May 12.
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. Cambria experiences significant seasonal variation in monthly rainfall.
Rain falls throughout the year in Cambria. The most rain falls during the 31 days centered around May 1, with an average total accumulation of 4.6 inches.
The least rain falls around January 25, with an average total accumulation of 2.3 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. Cambria experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 3.5 months, from November 30 to March 16, 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 30, with an average total liquid-equivalent accumulation of 0.3 inches.
The snowless period of the year lasts for 8.5 months, from March 16 to November 30. The least snow falls around July 28, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in Cambria varies significantly over the course of the year. In 2018, the shortest day is December 21, with 9 hours, 33 minutes of daylight; the longest day is June 21, with 14 hours, 47 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:33 AM on June 13, and the latest sunrise is 1 hour, 50 minutes later at 7:23 AM on November 3. The earliest sunset is at 4:37 PM on December 6, and the latest sunset is 3 hours, 45 minutes later at 8:22 PM on June 28.
Daylight saving time (DST) is observed in Cambria 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
Cambria experiences extreme seasonal variation in the perceived humidity.
The muggier period of the year lasts for 4.3 months, from May 15 to September 25, during which time the comfort level is muggy, oppressive, or miserable at least 20% of the time. The muggiest day of the year is July 22, with muggy conditions 78% of the time.
The least muggy day of the year is February 19, when muggy conditions are essentially unheard of.
Humidity Comfort Levels
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Cambria experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 7.2 months, from October 15 to May 21, with average wind speeds of more than 8.1 miles per hour. The windiest day of the year is April 1, with an average hourly wind speed of 10.3 miles per hour.
The calmer time of year lasts for 4.8 months, from May 21 to October 15. The calmest day of the year is July 27, with an average hourly wind speed of 5.8 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Cambria varies throughout the year.
The wind is most often from the north for 1.3 months, from January 19 to February 27 and for 1.1 weeks, from March 4 to March 12, with a peak percentage of 33% on February 19. The wind is most often from the south for 5.0 days, from February 27 to March 4 and for 10 months, from March 12 to January 19, with a peak percentage of 32% on February 28.
Best Time of Year to Visit
To characterize how pleasant the weather is in Cambria 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 times of year to visit Cambria for general outdoor tourist activities are from late May to late June and from late July to late September, with a peak score in the first week of September.
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 Cambria for hot-weather activities is from mid June to early September, with a peak score in the last week of July.
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.
The growing season in Cambria typically lasts for 6.9 months (210 days), from around April 2 to around October 29, rarely starting before March 13 or after April 21, and rarely ending before October 12 or after November 17.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in Cambria should appear around March 11, only rarely appearing before February 23 or after March 30.
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 4.3 months, from April 22 to August 31, 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 8 to February 8, with an average daily incident shortwave energy per square meter below 3.0 kWh. The darkest day of the year is December 23, with an average of 2.1 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Cambria are 37.781 deg latitude, -89.119 deg longitude, and 407 ft elevation.
The topography within 2 miles of Cambria contains only modest variations in elevation, with a maximum elevation change of 144 feet and an average elevation above sea level of 419 feet. Within 10 miles also contains only modest variations in elevation (276 feet). Within 50 miles contains only modest variations in elevation (915 feet).
The area within 2 miles of Cambria is covered by trees (52%) and cropland (40%), within 10 miles by cropland (54%) and trees (27%), and within 50 miles by cropland (62%) and trees (32%).
This report illustrates the typical weather in Cambria, 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
There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Cambria.
For each station, the records are corrected for the elevation difference between that station and Cambria according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
The estimated value at Cambria is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Cambria and a given station.
The stations contributing to this reconstruction are: Williamson County Regional Airport (49%, 11 kilometers, east); Southern Illinois Airport (47%, 12 kilometers, west); and Mount Vernon Airport (3.6%, 64 kilometers, north).
Time zones for aiports and weather stations are provided by AskGeo.com .