Precipitation Summary
Station: 112736 ELGIN, IL
1971-2000 NCDC Normals
Element | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Ann |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Prec. (in) | 1.68 | 1.38 | 2.23 | 3.91 | 3.84 | 4.31 | 3.93 | 4.43 | 3.63 | 2.66 | 3.12 | 2.10 | 37.22 |
Precipitation Extremes
Period of Record: 1898-2006
Month | High (in) | Year | Low (in) | Year | 1-Day Max (in) |
Date |
---|---|---|---|---|---|---|
Jan | 4.49 | 1907 | 0.00 | 1981 | 2.67 | 01-24-1938 |
Feb | 5.74 | 1925 | 0.04 | 1987 | 3.17 | 02-21-1997 |
Mar | 5.55 | 1922 | 0.20 | 1986 | 2.97 | 03-25-1954 |
Apr | 8.53 | 1999 | 0.68 | 1899 | 2.65 | 04-22-1973 |
May | 8.70 | 1996 | 0.47 | 1992 | 3.84 | 05-25-1922 |
Jun | 10.40 | 1993 | 0.24 | 1922 | 5.00 | 06-25-1898 |
Jul | 7.64 | 1957 | 0.11 | 1946 | 4.00 | 07-22-1976 |
Aug | 11.36 | 1987 | 0.64 | 1930 | 4.93 | 08-22-2002 |
Sep | 13.69 | 1961 | 0.01 | 1979 | 3.59 | 09-13-1936 |
Oct | 8.03 | 1941 | 0.05 | 1952 | 3.32 | 10-11-1954 |
Nov | 8.42 | 1985 | 0.25 | 1917 | 2.25 | 11-03-1935 |
Dec | 5.49 | 1971 | 0.29 | 1930 | 2.60 | 12-03-1982 |
Annual | 52.99 | 1925 | 21.51 | 1920 | 5.00 | 06-25-1898 |
Winter | 10.35 | 1974 | 1.42 | 1961 | 3.17 | 02-21-1997 |
Spring | 16.45 | 1922 | 2.94 | 1934 | 3.84 | 05-25-1922 |
Summer | 21.23 | 1979 | 4.02 | 1922 | 5.00 | 06-25-1898 |
Fall | 20.61 | 1961 | 1.95 | 1956 | 3.59 | 09-13-1936 |
Precipitation Threshold Climatology
Derived from 1971-2000 Averages:
*Annual/seasonal totals may differ from the sum of the monthly totals due to rounding.
Month | # Days Total ≥ 0.01″ |
# Days Total ≥ 0.10″ |
# Days Total ≥ 0.50″ |
# Days Total ≥ 1.00″ |
---|---|---|---|---|
Jan | 7.7 | 4.6 | 1.2 | 0.3 |
Feb | 5.9 | 3.5 | 0.7 | 0.1 |
Mar | 8.5 | 5.4 | 1.4 | 0.3 |
Apr | 11.6 | 7.6 | 2.9 | 1.1 |
May | 11.1 | 7.3 | 2.5 | 1.0 |
Jun | 9.9 | 7.0 | 3.1 | 1.0 |
Jul | 9.6 | 6.2 | 2.6 | 1.2 |
Aug | 10.1 | 7.1 | 2.8 | 1.4 |
Sep | 8.7 | 6.0 | 2.4 | 1.2 |
Oct | 8.6 | 5.1 | 1.6 | 0.5 |
Nov | 10.4 | 6.5 | 1.9 | 0.6 |
Dec | 9.0 | 5.2 | 1.2 | 0.3 |
Annual | 111.2 | 71.6 | 24.5 | 9.2 |
Winter | 22.6 | 13.3 | 3.1 | 0.8 |
Spring | 31.2 | 20.2 | 6.7 | 2.4 |
Summer | 29.6 | 20.2 | 8.6 | 3.6 |
Fall | 27.6 | 17.6 | 5.9 | 2.3 |
Temperature Summary
Station 112736 ELGIN, IL
1971-2000 NCDC Normals
Element | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Ann |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
High °F | 27.6 | 32.9 | 44.3 | 57.5 | 69.4 | 79.4 | 83.0 | 81.0 | 74.0 | 62.0 | 46.4 | 33.1 | 57.6 |
Low °F | 10.9 | 15.7 | 26.0 | 36.4 | 47.4 | 56.7 | 62.1 | 60.2 | 51.4 | 39.5 | 29.1 | 17.3 | 37.7 |
Mean °F | 19.3 | 24.3 | 35.2 | 47.0 | 58.4 | 68.1 | 72.6 | 70.6 | 62.7 | 50.8 | 37.8 | 25.2 | 47.7 |
HDD | 1419 | 1140 | 926 | 543 | 252 | 43 | 6 | 29 | 120 | 445 | 817 | 1235 | 6975 |
CDD | 0 | 0 | 0 | 1 | 48 | 135 | 240 | 201 | 50 | 4 | 0 | 0 | 679 |
HDD – heating degree days (base 65F); CDD – cooling degree days (base 65F)
Temperature Extremes
Period of Record: 1897-2006
Month | High Mean °F |
Year | Low Mean °F |
Year | 1-Day Max °F |
Date | 1-Day Min °F |
Date |
---|---|---|---|---|---|---|---|---|
Jan | 34.0 | 2006 | 5.5 | 1977 | 62 | 01-05-1997 | -27 | 01-20-1985 |
Feb | 37.8 | 1998 | 12.2 | 1979 | 70 | 02-26-2000 | -23 | 02-09-1899 |
Mar | 45.4 | 1921 | 26.9 | 1912 | 82 | 03-23-1907 | -8 | 03-04-2002 |
Apr | 56.8 | 1915 | 40.4 | 1907 | 91 | 04-27-1986 | 11 | 04-06-1979 |
May | 65.8 | 1911 | 53.2 | 1983 | 94 | 05-26-1911 | 28 | 05-03-2004 |
Jun | 74.8 | 1921 | 62.5 | 1982 | 101 | 06-26-1988 | 36 | 06-09-1913 |
Jul | 79.7 | 1921 | 68.4 | 1992 | 103 | 07-01-1910 | 41 | 07-03-1924 |
Aug | 77.5 | 1995 | 65.5 | 1992 | 102 | 08-12-1918 | 38 | 08-31-1915 |
Sep | 69.8 | 1925 | 58.6 | 1993 | 99 | 09-05-1899 | 25 | 09-30-1899 |
Oct | 59.1 | 1920 | 42.8 | 1925 | 89 | 10-15-1975 | 11 | 10-29-1925 |
Nov | 47.7 | 2001 | 29.5 | 1976 | 76 | 11-07-1915 | -7 | 11-29-1976 |
Dec | 36.7 | 1923 | 13.7 | 1983 | 67 | 12-06-2001 | -24 | 12-24-1983 |
Annual | 53.0 | 1921 | 42.6 | 1985 | 103 | 07-01-1910 | -27 | 01-20-1985 |
Winter | 31.6 | 1998 | 13.3 | 1979 | 70 | 02-26-1900 | -27 | 01-20-1985 |
Spring | 54.0 | 1921 | 42.3 | 1996 | 94 | 05-26-1911 | -8 | 03-04-1902 |
Summer | 75.6 | 1921 | 66.5 | 1992 | 103 | 07-01-1910 | 36 | 06-09-1913 |
Fall | 55.6 | 1922 | 45.0 | 1976 | 99 | 09-05-1999 | -7 | 11-29-1976 |
Temperature Threshold Climatology
Derived from 1971-2000 Averages:
*Annual/seasonal values may differ from the sum of the monthly values due to rounding.
Month | # Days High ≥ 90°F |
# Days High ≤ 32°F |
# Days Low ≤ 32°F |
# Days Low ≤ 0°F |
---|---|---|---|---|
Jan | 0.0 | 20.0 | 29.8 | 7.9 |
Feb | 0.0 | 13.0 | 26.1 | 4.8 |
Mar | 0.0 | 5.1 | 23.9 | 0.4 |
Apr | 0.0 | 0.2 | 9.5 | 0.0 |
May | 0.4 | 0.0 | 0.5 | 0.0 |
Jun | 3.2 | 0.0 | 0.0 | 0.0 |
Jul | 4.8 | 0.0 | 0.0 | 0.0 |
Aug | 2.8 | 0.0 | 0.0 | 0.0 |
Sep | 1.0 | 0.0 | 0.2 | 0.0 |
Oct | 0.0 | 0.0 | 7.2 | 0.0 |
Nov | 0.0 | 3.4 | 19.8 | 0.2 |
Dec | 0.0 | 13.6 | 28.9 | 4.3 |
Annual | 11.7 | 58.5 | 150.2 | 18.0 |
Winter | 0.0 | 46.6 | 84.8 | 16.9 |
Spring | 0.4 | 5.5 | 35.0 | 0.4 |
Summer | 10.8 | 0.0 | 0.0 | 0.0 |
Fall | 1.0 | 3.7 | 27.6 | 0.2 |
Snowfall Summary
Station: 112736 ELGIN, IL
1971-2000 Averages
Element | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Ann |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Snow (in) | 10.7 | 7.4 | 4.2 | 0.9 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 1.7 | 8.5 | 33.4 |
Snowfall Extremes
Period of Record: 1898-2006
Month | High (in) | Year | 1-Day Max (in) | Date |
---|---|---|---|---|
Jan | 52.0 | 1979 | 16.5 | 01-13-1966 |
Feb | 19.3 | 1960 | 10.0 | 02-10-1960 |
Mar | 24.5 | 1972 | 11.0 | 03-26-1970 |
Apr | 13.0 | 1975 | 12.0 | 04-03-1975 |
May | 2.0 | 1966 | 2.0 | 05-11-1966 |
Jun | 0.0 | – | – | – |
Jul | 0.0 | – | – | – |
Aug | 0.0 | – | – | – |
Sep | 0.0 | – | – | – |
Oct | 4.0 | 1967 | 4.0 | 10-27-1967 |
Nov | 8.2 | 1955 | 4.0 | 11-27-1978 |
Dec | 32.0 | 1978 | 12.0 | 12-23-1959 |
Season (Jul-Jun) | 100.1 | 1978-1979 | 16.5 | 01-13-1966 |
Snowfall Threshold Climatology
Derived from 1971-2000 Averages
*Annual values may differ from the sum of the monthly values due to rounding.
Month | # Days Total ≥ 0.1″ |
# Days Total ≥ 1.0″ |
# Days Total ≥ 2.0″ |
# Days Total ≥ 5.0″ |
---|---|---|---|---|
Jan | 3.9 | 2.9 | 1.6 | 0.3 |
Feb | 3.9 | 2.9 | 1.6 | 0.3 |
Mar | 2.1 | 1.5 | 0.8 | 0.2 |
Apr | 0.4 | 0.2 | 0.1 | 0.1 |
May | 0.0 | 0.0 | 0.0 | 0.0 |
Jun | 0.0 | 0.0 | 0.0 | 0.0 |
Jul | 0.0 | 0.0 | 0.0 | 0.0 |
Aug | 0.0 | 0.0 | 0.0 | 0.0 |
Sep | 0.0 | 0.0 | 0.0 | 0.0 |
Oct | 0.0 | 0.0 | 0.0 | 0.0 |
Nov | 1.4 | 0.8 | 0.4 | 0.0 |
Dec | 4.4 | 2.8 | 1.5 | 0.5 |
Annual | 17.8 | 12.1 | 6.2 | 1.4 |
Growing Season Summary
Station: 112736 ELGIN, IL
Growing Degree Day Averages
Derived from 1971-2000 Data
Base | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Ann |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
40 | 2 | 11 | 74 | 249 | 583 | 846 | 1016 | 942 | 691 | 333 | 92 | 10 | 4592 |
45 | 0 | 3 | 39 | 148 | 432 | 697 | 862 | 789 | 542 | 209 | 46 | 3 | 3570 |
50 | 0 | 0 | 18 | 78 | 292 | 547 | 708 | 636 | 396 | 119 | 20 | 1 | 2668 |
55 | 0 | 0 | 7 | 39 | 176 | 400 | 554 | 483 | 259 | 57 | 6 | 0 | 1880 |
60 | 0 | 0 | 2 | 17 | 94 | 263 | 401 | 332 | 151 | 22 | 1 | 0 | 1218 |
50** | 1 | 7 | 49 | 149 | 347 | 545 | 689 | 626 | 427 | 201 | 50 | 5 | 2932 |
**Modified Growing Degree Days: Base 50, Ceiling 86.
Growing Season Summary
Derived from 1971-2000 Averages
Date of Last Spring Occurrence | Date of First Fall Occurrence | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Temp °F | Median | Early | 90% | 10% | Late | Median | Early | 90% | 10% | Late |
32 | 4/26 | 4/09 | 4/16 | 5/09 | 5/28 | 10/11 | 9/23 | 9/30 | 10/22 | 11/02 |
30 | 4/21 | 3/28 | 4/05 | 5/01 | 5/09 | 10/16 | 9/23 | 10/04 | 10/28 | 11/07 |
28 | 4/17 | 3/27 | 4/04 | 4/27 | 4/29 | 10/25 | 10/08 | 10/10 | 11/15 | 11/19 |
24 | 4/06 | 3/14 | 3/21 | 4/14 | 4/22 | 11/06 | 10/14 | 10/23 | 11/20 | 11/30 |
20 | 3/22 | 3/03 | 3/13 | 4/09 | 4/19 | 11/13 | 10/24 | 10/31 | 12/06 | 12/22 |
16 | 3/17 | 2/13 | 2/27 | 4/05 | 4/07 | 11/22 | 11/03 | 11/09 | 12/12 | 12/22 |
Length of Growing Season (Days)
Derived from 1971-2000 Averages
Temp °F | Median | Shortest | 10% | 90% | Longest |
---|---|---|---|---|---|
32 | 166 | 143 | 156 | 182 | 193 |
30 | 177 | 158 | 163 | 204 | 212 |
28 | 193 | 172 | 175 | 216 | 225 |
24 | 215 | 193 | 199 | 240 | 248 |
20 | 233 | 207 | 209 | 261 | 282 |
16 | 253 | 218 | 222 | 284 | 286 |
Copyright 2007 Illinois State Water Survey
Last Modified: September 11, 2007