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Angie Peltier


Angie Peltier
Former Extension Educator, Commercial Agriculture



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Hill and Furrow

Current topics about crop production in Western Illinois, including field crops research at the NWIARDC in Monmouth.
Monthly departure from average

October and November 2013 Weather Summary

Posted by Angie Peltier - Weather

Brian Mansfield and Marty Johnson collect soil and air temperature and precipitation data at the Northwestern Illinois Agricultural Research and Demonstration Center (NWIARDC) for the National Weather Service each day. A 30-year average is generated from this data and is one way to determine how much the current month's temperature and rainfall may have differed from the recent past.

Temperature

NWIARDC. October high and low air temperatures were right around the 30-year average of 64 and 41 degrees, respectively (Table). November high and low air temperatures, however, were approximately 4.5 degrees lower than the 30-year average (Table).

Illinois. November air temperatures at the NWIARDC mirrored those of the rest of the state. According to Illinois State Climatologist, Dr. Jim Angel, "the statewide temperature for November was 38.3 degrees, 4.2 degrees below average".

What does this mean? This shift to unseasonably cool temperatures could be dreaded or welcome depending upon one's point of view. Frozen soils may have stymied the fall tillage or nitrogen application plans of some Illinois producers. But for those that did apply fall nitrogen, these cold temperatures bode well for the retention of soil nitrogen as the enzymatic activity of bacteria that break down ammonium to nitrite and nitrate is temperature dependent. Fewer insects that overwinter in Illinois soils will be able to survive a cold winter compared to a milder winter such as 2011. This is particularly true for the flea beetle, the insect vector of the bacterium that causes Stewart's wilt in corn.

OCTOBER 2013 TEMPERATURE SUMMARY

Soil Temperature

Air Temp

4" (Bare)

4" (Sod)

(°F)

-------------------(°F)-----------------

Monthly average high

64

64

59

Monthly average low

41

52

54

Observed high (date)

85 (3)

79 (5)

74 (5)

Observed low (date)

22 (25)

32 (26)

40 (26)

NOVEMBER 2013 TEMPERATURE SUMMARY

Soil Temperature

Air Temp

4" (Bare)

4" (Sod)

(°F)

-------------------(°F)-----------------

Monthly average high

45

44

44

Monthly average low

26

36

41

Observed high (date)

69 (18)

60 (1)

56 (1)

Observed low (date)

5 (24)

23 (28)

32 (28,29,30)

Precipitation

NWIARDC. Just like the four months before them, October and November saw below average precipitation at the NWIARDC (Table and Figure).

Illinois. State-wide, November precipitation was approximately 0.9 inches below average. According to Illinois State Climatologist, Dr. Jim Angel, this year "ranks as the 15th driest July-November on record" which is "in stark contrast to the first half of 2013 which was the wettest January-June on record".

2013 PRECIPITATION (in inches)

Since January 1

Month

Monthly Total

Monthly departure from average

Total accumulation

Total departure

January

2.41

+0.89

2.41

+0.89

February

2.17

+0.63

4.58

+1.52

March

2.23

-0.30

6.81

+1.22

April

7.21

+3.33

14.02

+4.55

May

10.55

+5.78

24.57

+10.33

June

2.28

-2.21

26.85

+8.12

July

2.01

-2.10

28.86

+6.02

August

0.18

-4.56

29.04

+1.46

September

1.24

-2.50

30.28

-1.04

October

2.53

-0.27

32.81

-1.31

November

1.60

-0.68

34.41

-1.99



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