NEEDLES FAA AIRPORT, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(046118) NEEDLES FAA AIRPORT
From Year=1948 To Year=2006
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	403	499	721	931	1249	1495	1736	1674	1417	1080	640	407	12251
40 S	403	902	1622	2553	3803	5297	7033	8707	10125	11205	11845	12251	12251
45 M	257	360	566	781	1094	1345	1581	1519	1267	925	490	258	10443
45 S	257	617	1182	1963	3058	4402	5983	7502	8770	9695	10185	10443	10443
50 M	132	227	412	631	939	1195	1426	1364	1117	770	343	130	8686
50 S	132	359	771	1402	2341	3536	4962	6326	7444	8214	8557	8686	8686
55 M	47	115	268	482	784	1045	1271	1209	967	616	209	43	7056
55 S	47	162	430	912	1696	2740	4011	5221	6188	6804	7013	7056	7056
60 M	10	42	146	339	629	895	1116	1054	817	463	102	7	5620
60 S	10	52	197	536	1165	2060	3176	4230	5048	5511	5613	5620	5620

Corn Growing Degree Days
50 M	223	291	441	593	799	929	1087	1053	896	696	382	222	7614
50 S	223	514	955	1549	2348	3277	4364	5417	6313	7009	7392	7614	7614

M = Monthly Data
S - Running sum of monthly data.
Growing Degree Day units are computed as the difference between the daily average temperature and the base temperature. (Daily Ave. Temp. - Base Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is above the base temperature. Negative numbers are discarded. Example: If the days high temperature was 95 and the low temperature was 51, the base 60 heating degree day units is ((95 + 51) / 2) - 60 = 13. This is done for each day of the month and summed.
Corn Growing Degree Day units have the limitations that the maximum daily temperatures greater than 86 F are set to 86 F and minimums less than 50 F are set to 50 F.
Table updated on Jul 28, 2006
Months with 5 or more missing days are not considered
Years with 1 or more missing months are not considered

Western Regional Climate Center, wrcc@dri.edu