Historical Climate Data

Precipitation Summary

Station: 110137 ALTON MELVIN PRICE L&D, IL

1971-2000 NCDC Normals

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Prec. (in) 1.99 2.30 3.47 4.16 4.24 3.22 3.49 3.17 3.14 2.70 3.75 2.91 38.54

Precipitation Extremes

Period of Record: 1892-2006


Month
High (in)
Year
Low (in)
Year 		1-Day
Max (in)
Date
Jan 9.52 2005 0.09 1986 3.58 01-04-1950
Feb 5.68 1951 0.04 1947 2.28 02-01-1988
Mar 8.12 1977 0.89 1956 4.12 03-28-1977
Apr 17.54 1996 0.82 1988 7.70 04-23-1996
May 11.79 2004 1.02 1992 4.70 05-17-1995
Jun 10.75 1951 0.41 1991 4.97 06-17-2004
Jul 9.61 1949 0.27 1983 4.68 07-16-1952
Aug 14.75 1946 0.47 1953 4.31 08-16-1946
Sep 11.47 1993 0.30 1979 3.46 09-17-1969
Oct 7.14 1986 0.29 1952 3.50 10-04-1986
Nov 12.80 1946 0.17 1949 5.40 11-01-1946
Dec 8.18 1967 0.15 1955 2.73 12-10-1971
             
Annual 59.03 2004 19.08 1989 7.70 04-23-1996
Winter 14.68 1950 0.77 1956 3.58 01-04-1950
Spring 28.39 1996 5.49 2005 7.70 04-23-1996
Summer 20.25 1946 2.80 1953 4.97 06-17-2004
Fall 17.78 1993 3.37 1953 5.40 11-01-1946

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 7.4 4.6 1.3 0.4
Feb 7.4 4.6 1.2 0.5
Mar 10.2 7.0 2.4 0.6
Apr 10.4 7.1 2.8 0.9
May 10.3 7.3 3.0 1.1
Jun 7.7 5.4 2.4 0.9
Jul 8.2 5.7 2.4 0.9
Aug 7.4 5.6 2.3 0.8
Sep 6.9 4.8 2.1 0.8
Oct 8.3 5.6 1.7 0.6
Nov 9.5 6.8 2.7 1.0
Dec 8.3 5.6 1.9 0.8
         
Annual 102.2 70.3 26.3 9.4
Winter 23.1 14.8 4.5 1.7
Spring 30.9 21.4 8.3 2.6
Summer 23.3 16.8 7.1 2.7
Fall 24.7 17.2 6.4 2.4

Temperature Summary

Station 110137 ALTON MELVIN PRICE L&D, IL

1971-2000 NCDC Normals

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
High °F 36.0 41.8 52.5 64.1 74.6 83.7 88.1 86.3 79.1 67.5 53.2 40.7 64.0
Low °F 19.4 24.0 33.7 44.6 55.0 64.3 68.7 66.4 58.0 46.2 35.4 24.6 45.0
Mean °F 27.7 32.9 43.1 54.4 64.8 74.0 78.4 76.4 68.6 56.9 44.3 32.7 54.5
HDD 1156 900 680 333 122 8 0 7 48 270 622 1003 5149
CDD 0 0 0 14 115 278 416 359 154 18 0 0 1354

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

Temperature Extremes

Period of Record: 1948-2006


Month 		High
Mean °F
Year 		Low
Mean °F
Year 		1-Day
Max °F
Date 		1-Day
Min °F
Date
Jan 43.2 2006 13.6 1977 72 01-24-1950 -16 01-10-1982
Feb 43.1 1954 20.0 1979 76 02-25-2000 -15 02-04-1996
Mar 49.0 1973 30.0 1960 85 03-29-1963 -1 03-05-1960
Apr 62.3 2006 48.4 1983 92 04-29-1952 20 04-06-1982
May 73.8 1962 60.3 1981 98 05-26-1953 32 05-10-1966
Jun 82.7 1952 68.9 1982 107 06-27-1952 44 06-05-1998
Jul 84.3 1954 74.1 1971 111 07-14-1954 50 07-06-1972
Aug 82.4 1983 70.9 2004 106 08-23-1948 46 08-29-1986
Sep 76.6 2005 61.5 1974 103 09-04-1954 37 09-30-1949
Oct 67.8 1963 49.9 1976 97 10-04-2006 25 10-21-1952
Nov 52.6 2001 35.1 1976 84 11-01-1950 4 11-30-1964
Dec 41.4 1965 19.3 1983 73 12-02-1970 -16 12-25-1983
                 
Annual 59.9 1990 50.2 1989 111 07-14-1954 -16 01-10-1982
Winter 37.3 1998 22.7 1979 76 02-25-1900 -16 12-25-1983
Spring 60.2 1977 48.8 1984 98 05-26-1953 -1 03-05-1960
Summer 80.6 1952 71.9 1985 111 07-14-1954 44 06-05-1998
Fall 62.0 1963 50.4 1976 103 09-04-1954 4 11-30-1964

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 11.8 27.5 2.2
Feb 0.0 6.9 22.2 1.1
Mar 0.0 1.4 14.4 0.0
Apr 0.0 0.0 2.6 0.0
May 0.7 0.0 0.0 0.0
Jun 5.9 0.0 0.0 0.0
Jul 13.7 0.0 0.0 0.0
Aug 9.5 0.0 0.0 0.0
Sep 3.4 0.0 0.0 0.0
Oct 0.0 0.0 1.4 0.0
Nov 0.0 0.8 12.3 0.0
Dec 0.0 6.5 23.5 0.9
         
Annual 32.7 27.2 104.2 4.2
Winter 0.0 25.1 73.1 4.2
Spring 0.8 1.4 17.1 0.0
Summer 29.1 0.0 0.0 0.0
Fall 3.4 0.8 13.9 0.0

Snowfall Summary

Station: 110137 ALTON MELVIN PRICE L&D, IL

1971-2000 Averages

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Snow (in) 2.2 2.9 2.0 0.4 0.0 0.0 0.0 0.0 0.0 0.0 0.3 0.7 8.5

Snowfall Extremes

Period of Record: 1892-2006

Month High (in) Year 1-Day Max (in) Date
Jan 18.8 1962 10.0 01-10-1987
Feb 19.5 1993 12.0 02-26-1993
Mar 24.6 1960 13.0 03-08-1978
Apr 5.5 1971 5.5 04-06-1971
May 0.0 - 3.0 05-02-1929
Jun 0.0 - - -
Jul 0.0 - - -
Aug 0.0 - - -
Sep 0.0 - - -
Oct 0.0 - - -
Nov 9.8 1951 8.5 11-06-1951
Dec 8.7 1969 8.0 12-14-2000
Season (Jul-Jun) 38.4 1961-1962 13.0 03-08-1978

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 1.2 0.8 0.6 0.1
Feb 1.2 0.8 0.6 0.1
Mar 0.4 0.4 0.3 0.2
Apr 0.1 0.1 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 0.1 0.1 0.0 0.0
Dec 0.4 0.2 0.1 0.0
Annual 2.7 2.0 1.4 0.5

Growing Season Summary

Station: 110137 ALTON MELVIN PRICE L&D, 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 18 56 189 441 775 1015 1191 1129 868 525 191 47 6267
45 5 24 108 308 620 867 1036 974 718 378 110 19 5025
50 1 9 56 192 466 718 882 820 568 246 55 7 3910
55 0 2 25 104 319 570 727 665 421 139 22 2 2917
60 0 0 9 47 191 423 573 511 285 65 6 0 2055
50** 12 35 109 244 480 695 827 779 566 305 103 26 4068

**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 4/08 3/21 3/23 4/16 4/22 11/03 10/02 10/18 11/14 11/23
30 4/02 3/08 3/17 4/12 4/19 11/07 10/18 10/22 11/17 12/11
28 3/25 2/19 3/10 4/10 4/19 11/12 10/20 10/23 12/06 12/22
24 3/18 2/05 2/27 4/06 4/10 11/22 11/03 11/05 12/12 12/22
20 3/10 12/27 2/07 3/23 4/06 12/03 11/03 11/10 12/21 12/26
16 2/16 12/25 1/24 3/13 3/26 12/12 11/08 11/13 1/03 2/04

Length of Growing Season (Days)

Derived from 1971-2000 Averages

Temp °F Median Shortest 10% 90% Longest
32 212 175 191 226 234
30 216 188 198 247 250
28 228 193 207 270 281
24 248 212 227 280 290
20 272 221 238 295 360
16 289 253 265 345 374

Back to the Station List

Copyright 2007 Illinois State Water Survey
Jim Angel, State Climatologist, jimangel@illinois.edu
Last Modified: September 11, 2007