Days and nights were both warmer here than in 2017, according to the National Weather Service. And conditions were drier, thanks to slightly less precipitation.
The average daytime high temperature during June was 85.2 degrees. This was up from more than 84.1 degrees last year.
The hottest temperature of the month was 94, reported June 17. This was one degree warmer than the high of 93, reported June 12 and 14, 2017.
Most highs in the 80s both last month and a year earlier.
This year, however, the mercury topped 90 10 times, including a five-day stretch from the 15th to the 19th. Last year, the temperature hit the 90s four times.
The average June overnight low was 64.9 degrees, up from 60.4 lasat year.
The coolest temperature was 54 on both June 4 and 5. The temperature sank to 55 on the 6th. This was down from the low of 47 on June 27, 2017, one of three nights when temperatures in the upper 40s were reported.
Most lows were in the 60s last year, although it failed to cool down below 70 on two nights. This year, there were four nights in the 70s and 22 nights with temperatures in the 60s.
June 1933 is the June hottest overall. The average daytime high temperature for the month was 93.7 degrees, while the overnight low was 65. Temperatures hit the triple digits six times during the month's final 10 days.
The hottest temperature was 103, reported on June 30. This fell short of the record of 108, reported June 20, 1953, and June 26, 1954.
The coldest June temperature ever in the county is 40, reported June 2, 1956.
June rainfall totaled 1.68 inches, compared to 1.83 inches last year. The heaviest precipitation dropped 1.17 inches here June 9 and another .15 inch fell during the next week.
Last year, the heaviest rainfall produced .70 inches June 18. The U.S. Drought Monitor listed parts of the county as being "abnormally dry" both this June and last.
The rainest local June occurred in 2013, when 10.34 inches of rain soaked the county. That bested the old record of more than 10.22 inches that fell in June 1944. Measureable rainfall was reported on 16 of the month's 30 days, with the heaviest precipitation dumping 2.89 inches on the county June 1.
The driest June was a year earlier. Thanks to the 2012 drought, only .55 inch of rain fell here, besting a record set in the Dust Bowl days of the 1930s.
A total of 4.37 inches of rain fell here in May. The heaviest rain of the month dropped 1.41 inches on the county May 4. This was on top of .42 inch that fell the previous day. Another .11 fell on the 6th.
The average May high was almost 82.52. The hottest temperature of the month was 92, reported May 28. Most high temperatures during the month were in the 80s. The May record of 97 was set May 17, 1962.
The average May low was almost 59. The coldest temperature of the month was 41, reported May 1. Most May lows were in the 60s.
Only 1.47 inches of rain fell here during May, with the heaviest rainfall -- on May 18 - dropping .71 inch on the county. Another .30 inch fell during the next two days.
Illinois experienced its 11th warmest and 14th wettest June on record, according to State Climatologist Jim Angel at the Illinois State Water Survey.
The statewide average temperature was 75 degrees, 3.1 degrees above normal. The statewide average precipitation was 6.36 inches, 2.15 inches above normal.
The greatest monthly total precipitation for June in Illinois was 14.58 inches at Rockford. In addition, the Rockford Airport reported 14.23 inches, their wettest June and wettest month on record.
Precipitation was especially heavy across northern, east-central, and southeastern Illinois with widespread amounts in the 10 to 14 inch range. Meanwhile, parts of western and southern Illinois received less than 3 inches of rain.
June precipitation for Illinois has shown an upward trend and increased variability in recent decades. Over the past century, annual precipitation in Illinois has increased by about 10 to 15 percent, depending on the location. As a result, there have been more problems with flooding but fewer problems with long-term drought.
At the end of the month, the U.S. Drought Monitor showed "abnormally dry" and "moderate drought" conditions persisting in western Illinois.
Hot weather was common in June. The number of days that hit 90 degrees or higher ranged from about three to four in northern Illinois to about half the month in the St. Louis area. By the end of June, the combination of high temperatures and humidity led to excessive heat warnings by the NWS.
July is already living up to forecasts showing Illinois has an increased chance of above-normal temperatures this month. Meanwhile, the precipitation forecast is for equal chances between above, below, and near-normal precipitation for Illinois. EC is a common forecast for summer precipitation since it largely depends on short-term, local conditions (such as the passing of a cold front), rather than large-scale patterns such as El Niño.
The forecast through July 15 suggests that drier conditions will prevail across most of central and northern Illinois, but the southern third of Illinois has an increased chance of above-normal precipitation.
In June 2017, the average state temperature was 72.8 degrees. The statewide average rainfall was 3.27 inches.
The statewide average temperature for May was 70.6 degrees. The statewide average precipitation for Illinois in May was 3.98 inches.