Chenoa Station 111475

Precipitation Summary

Station: 111475 CHENOA, IL


1971-2000 NCDC Normals

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Prec. (in) 1.52 1.43 3.02 3.31 3.88 4.10 3.33 3.22 2.91 2.69 2.73 2.47 34.61

Precipitation Extremes

Period of Record: 1944-2006

Month High (in) Year Low (in) Year 1-Day
Max (in)
Date
Jan 8.21 1965 0.00 2000 2.95 01-01-1965
Feb 4.70 1997 0.00 2002 1.70 02-01-1968
Mar 6.95 1985 0.30 1958 3.73 03-28-1985
Apr 10.78 1957 0.31 1971 3.33 04-24-1950
May 8.11 1995 0.20 1992 2.45 05-24-1995
Jun 8.19 1993 0.21 1988 3.77 06-25-1968
Jul 9.00 1951 0.48 1991 8.20 07-09-1951
Aug 8.67 1977 0.51 1950 3.93 08-17-1997
Sep 11.95 1961 0.06 1979 2.47 09-13-1970
Oct 8.04 1986 0.00 1964 5.66 10-03-1986
Nov 7.56 1985 0.36 1998 2.21 11-18-2003
Dec 8.95 1982 0.10 1955 5.07 12-03-1982
Annual 50.71 1965 20.08 1988 8.20 07-09-1951
Winter 14.88 1950 1.33 1963 5.07 12-03-1982
Spring 17.82 1995 3.78 1958 3.73 03-28-1985
Summer 20.87 1951 2.52 1988 8.20 07-09-1951
Fall 16.47 1961 3.00 1999 5.66 10-03-1986

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 7.6 3.9 0.8 0.2
Feb 6.8 3.7 0.8 0.3
Mar 9.2 6.3 2.1 0.4
Apr 10.6 6.9 2.5 0.6
May 10.7 7.5 2.8 0.9
Jun 9.7 6.7 2.8 1.2
Jul 8.2 5.9 2.5 0.7
Aug 7.6 5.3 2.0 0.9
Sep 7.3 5.4 2.0 0.9
Oct 8.0 5.4 1.6 0.5
Nov 8.7 5.9 1.8 0.5
Dec 8.5 4.9 1.3 0.5
Annual 103.0 67.8 22.9 7.6
Winter 22.9 12.5 2.9 1.0
Spring 30.5 20.6 7.4 2.0
Summer 25.5 17.9 7.2 2.8
Fall 24.1 16.8 5.4 1.9

Temperature Summary

Station 111475 CHENOA, IL


1971-2000 NCDC Normals

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
High °F 31.5 37.2 49.6 62.9 74.3 83.3 85.6 83.7 77.8 65.6 49.5 36.2 61.4
Low °F 14.6 19.8 30.1 39.9 50.9 60.3 63.8 61.6 53.8 42.8 32.0 20.8 40.9
Mean °F 23.1 28.5 39.9 51.4 62.6 71.8 74.7 72.7 65.8 54.2 40.8 28.5 51.2
HDD 1300 1023 781 414 165 15 2 16 77 349 728 1132 6002
CDD 0 0 0 6 90 219 303 253 101 14 0 0 986

HDD – heating degree days (base 65F); CDD – cooling degree days (base 65F)


Temperature Extremes

Period of Record: 1951-2006

Month High
Mean °F
Year Low
Mean °F
Year 1-Day
Max °F
Date 1-Day
Min °F
Date
Jan 37.3 2006 8.9 1977 67 01-24-1967 -23 01-20-1985
Feb 39.4 1998 14.3 1978 73 02-26-1996 -19 02-03-1996
Mar 46.4 2000 24.2 1960 85 03-31-1981 -6 03-04-2002
Apr 57.6 1977 44.9 1961 91 04-25-1986 7 04-07-1982
May 69.4 1991 56.5 1967 95 05-19-1975 22 05-10-1966
Jun 76.8 1971 66.2 1982 102 06-20-1953 36 06-11-1972
Jul 79.8 1955 71.4 1971 103 07-14-1954 45 07-05-1967
Aug 79.1 1995 67.4 1992 103 08-17-1988 37 08-18-1963
Sep 71.4 2005 61.1 1975 100 09-01-1953 24 09-23-1974
Oct 63.2 1963 47.8 1976 92 10-02-1953 17 10-29-1952
Nov 49.7 2001 32.3 1976 79 11-01-2000 -4 11-29-1955
Dec 36.2 1965 15.6 1983 70 12-02-1982 -26 12-22-1989
Annual 54.7 1998 47.2 1968 103 07-14-1954 -26 12-22-1989
Winter 33.6 2002 18.6 1979 73 02-26-1996 -26 12-22-1989
Spring 57.3 1977 45.5 1960 95 05-19-1975 -6 03-04-1902
Summer 76.5 1995 69.2 1992 103 07-14-1954 36 06-11-1972
Fall 57.6 1998 47.7 1976 100 09-01-1953 -4 11-29-1955

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 15.7 29.0 5.4
Feb 0.0 9.8 24.2 3.0
Mar 0.0 2.4 19.3 0.1
Apr 0.1 0.0 6.6 0.0
May 1.6 0.0 0.4 0.0
Jun 6.1 0.0 0.0 0.0
Jul 7.9 0.0 0.0 0.0
Aug 5.3 0.0 0.0 0.0
Sep 2.3 0.0 0.2 0.0
Oct 0.0 0.0 4.7 0.0
Nov 0.0 1.8 16.9 0.0
Dec 0.0 10.4 26.9 2.5
Annual 23.3 40.2 127.5 10.8
Winter 0.0 35.9 80.1 10.8
Spring 1.7 2.4 26.1 0.1
Summer 19.4 0.0 0.0 0.0
Fall 2.3 1.8 21.8 0.0

Snowfall Summary

Station: 111475 CHENOA, IL


1971-2000 Averages

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Snow (in) 7.2 5.2 2.5 1.0 0.0 0.0 0.0 0.0 0.0 0.1 1.6 5.4 23.0

Snowfall Extremes

Period of Record: 1944-2006

Month High (in) Year 1-Day Max (in) Date
Jan 24.1 1979 10.0 01-26-1967
Feb 16.5 1986 7.0 02-14-1952
Mar 18.5 1960 7.0 03-16-1960
Apr 9.7 1982 7.7 04-11-1997
May 0.2 1989 0.2 05-07-1989
Jun 0.0
Jul 0.0
Aug 0.0
Sep 0.0
Oct 2.0 1967 2.0 10-27-1967
Nov 10.0 1951 8.0 11-06-1951
Dec 20.3 1973 12.0 12-19-1973
Season (Jul-Jun) 50.9 1977-1978 12.0 12-19-1973

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 2.2 1.0 0.2
Feb 3.9 2.2 1.0 0.2
Mar 1.9 0.8 0.5 0.1
Apr 0.6 0.4 0.2 0.0
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 0.1 0.0 0.0 0.0
Nov 1.3 0.6 0.3 0.1
Dec 4.1 1.7 1.1 0.2
Annual 16.9 8.5 4.5 0.7

Growing Season Summary

Station: 111475 CHENOA, 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 8 26 130 362 700 951 1076 1013 777 447 137 26 5625
45 2 9 72 238 546 802 922 858 627 308 74 11 4447
50 0 2 36 139 396 652 767 704 480 193 35 4 3391
55 0 0 15 71 260 503 612 549 338 105 12 1 2456
60 0 0 5 30 149 357 458 395 213 47 3 0 1649
50** 4 17 83 221 436 633 734 683 501 271 77 13 3656

**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 4/23 3/29 4/06 5/10 5/12 10/08 9/23 9/24 10/24 11/04
30 4/17 3/28 4/05 5/03 5/08 10/17 9/23 9/28 11/05 11/17
28 4/09 3/24 3/27 4/24 4/29 10/18 9/23 10/02 11/09 11/20
24 4/05 3/14 3/16 4/13 4/23 11/03 9/23 10/18 11/15 12/11
20 3/21 2/28 3/03 4/08 4/09 11/15 10/19 11/02 12/01 12/11
16 3/13 2/12 2/26 3/27 4/07 11/25 11/02 11/10 12/11 12/21

Length of Growing Season (Days)

Derived from 1971-2000 Averages

Temp °F Median Shortest 10% 90% Longest
32 170 138 147 192 201
30 181 152 167 203 222
28 194 152 172 216 226
24 213 167 191 241 248
20 241 208 217 260 272
16 256 222 234 283 286

 


Copyright 2007 Illinois State Water Survey
Last Modified: September 11, 2007