Climate for Station: Rock is L&d 15, Illinois, United States
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Station Statistics
10-Year Trend
High: +1.21 °C/decade
Low: +1.06 °C/decade
Rain: -0.67 mm/decade
25-Year Trend
High: +0.17 °C/decade
Low: -0.08 °C/decade
Rain: -0.00 mm/decade
50-Year Trend
High: +0.37 °C/decade
Low: +0.48 °C/decade
Rain: -0.05 mm/decade
All-Time Trend
High: +0.08 °C/decade
Low: +0.25 °C/decade
Rain: -0.02 mm/decade
Percentage Above-Average Days
Last 12 Months: 57.0%
This Year: 25.0%
Precipitation Concentration Index (PCI) ℹ️
Last 12 Months: 13.1
Historical Average: 13.3
Percentile Rank of Last 12 Months ℹ️
High: 88th percentile
Low: 79th percentile
Rain: 23rd percentile
Change in Variance ℹ️
High: -4.5%
Low: -6.9%
Intraday: -2.4%
Data Coverage
89.4%
First Year of Data
1871
Station Location
Weather Records
| Max High | Avg High | Min High | Max Avg | Avg Avg | Min Avg | Max Low | Avg Low | Min Low | Max Precipitation | Avg Precipitation | Max Snow | Avg Snow | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Record | 40.6 °C | — | -24.2 °C | 34.4 °C | — | -30.8 °C | 29.4 °C | — | -38.9 °C | 134.6 mm | — | 315.0 mm | — |
| January | 20.6 °C | -0.7 °C | -23.3 °C | 10.2 °C | -6.0 °C | -29.8 °C | 7.8 °C | -9.5 °C | -38.9 °C | 39.4 mm | 1.2 mm | 305.0 mm | 5.7 mm |
| February | 24.4 °C | 2.1 °C | -23.3 °C | 14.4 °C | -3.3 °C | -30.8 °C | 9.4 °C | -7.2 °C | -31.4 °C | 98.6 mm | 1.3 mm | 315.0 mm | 5.2 mm |
| March | 31.1 °C | 8.9 °C | -13.9 °C | 21.4 °C | 3.5 °C | -17.4 °C | 16.7 °C | -1.3 °C | -25.6 °C | 134.6 mm | 2.1 mm | 152.0 mm | 2.0 mm |
| April | 33.9 °C | 16.2 °C | -3.3 °C | 23.5 °C | 9.9 °C | -4.5 °C | 21.1 °C | 4.8 °C | -11.1 °C | 65.4 mm | 2.7 mm | 51.0 mm | 0.1 mm |
| May | 35.6 °C | 22.5 °C | 4.4 °C | 29.6 °C | 16.4 °C | 2.5 °C | 25.0 °C | 11.2 °C | -4.4 °C | 81.3 mm | 3.4 mm | 0.0 mm | 0.0 mm |
| June | 37.8 °C | 27.6 °C | 10.0 °C | 31.2 °C | 21.7 °C | 11.4 °C | 28.9 °C | 16.9 °C | 2.2 °C | 95.0 mm | 3.5 mm | 0.0 mm | 0.0 mm |
| July | 40.0 °C | 29.3 °C | 17.8 °C | 34.4 °C | 23.7 °C | 15.0 °C | 28.9 °C | 19.0 °C | 3.3 °C | 131.1 mm | 3.1 mm | 0.0 mm | 0.0 mm |
| August | 40.6 °C | 28.6 °C | 16.4 °C | 33.6 °C | 22.6 °C | 12.2 °C | 29.4 °C | 18.1 °C | 6.1 °C | 81.7 mm | 3.1 mm | 0.0 mm | 0.0 mm |
| September | 37.7 °C | 24.9 °C | 10.0 °C | 29.3 °C | 18.3 °C | 6.4 °C | 26.1 °C | 13.6 °C | -6.7 °C | 101.6 mm | 2.7 mm | 0.0 mm | 0.0 mm |
| October | 35.0 °C | 17.7 °C | 0.0 °C | 26.1 °C | 11.1 °C | -2.3 °C | 22.2 °C | 6.7 °C | -11.1 °C | 71.3 mm | 2.1 mm | 25.0 mm | 0.0 mm |
| November | 26.7 °C | 9.0 °C | -13.9 °C | 20.2 °C | 3.7 °C | -13.1 °C | 18.3 °C | -0.2 °C | -23.9 °C | 117.9 mm | 1.9 mm | 254.0 mm | 1.0 mm |
| December | 22.2 °C | 2.0 °C | -24.2 °C | 17.8 °C | -3.2 °C | -30.1 °C | 13.9 °C | -6.3 °C | -38.3 °C | 95.5 mm | 1.5 mm | 152.0 mm | 2.5 mm |
Plots
Current Year Climate Trends vs Historical




Max Temperature this Year | 1 of 4
Climate 12-Month Moving Averages




Max Temperature 12-Month MA | 1 of 4
Daily Average Temperatures Throughout the Year



Average Max Temperature Throughout Year | 1 of 3
