Weather - eLivermore.com

eLivermore.com - By Bill Nale

Weather

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Contents
of this
Section

Weather Links
Temperature Averages
Hail Storm
Lunar Eclipse
Precipitation Data for Livermore	Daily Precipitation for this year Updated Weekly
Historical Precipitation Data	Monthly Precipitation 1876 to 2009

Weather Links Note that many Weather sites will display "pop-under" ads.
	Historical Weather	temperature averages for Livermore - San Francisco - San Jose. From Washington Post.
	The Weather Channel	For Livermore - Pleasanton - Dublin - San Ramon
	Yahoo Weather	for Livermore - Pleasanton, - Dublin - San Ramon - Sunol
	The Weather Underground for	Livermore, - Pleasanton - Dublin - San Ramon - All give Livermore readings.
	National Weather Service Home	SF Bay - Livermore Airport
	AWS Live Weather	from Las Positas College
	Weather Station at Cliff Ranch	Pleasanton
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Temperature Averages for Livermore

	Jan	Feb	March	April	May	June	July	Aug	Sept	Oct	Nov	Dec	Annual
Average Max. Temperature (F)	56.6	60.9	64.9	70.5	76.8	83.3	89.4	88.8	86.5	78.2	66.0	57.4	73.3
Record High Temp (F) & year	75 1976	80 1977	88 1988	96 1981	104 2001	113 1961	112 1961	112 1946	115 1950	106 1980	90 1949	79 1958
Average Min. Temperature (F)	36.3	39.0	41.0	43.4	47.7	51.7	54.2	54.0	52.5	47.6	40.9	36.9	45.4
Record Lo Temp (F) & Year	18 1961	23 1950	22 1971	29 1976	32 1952	38 1968	36 1974	40 1977	35 1950	29 1971	23 1961	18 1990
Average Temperature (F)	46.1	50.4	52.7	56.6	61.9	67.7	71.6	71.4	69.0	62.7	53.0	46.3	59.1
Average Total Precipitation (in.)	2.93	2.55	2.09	1.10	0.44	0.10	0.02	0.05	0.16	0.69	1.75	2.59	14.46

Note there is no separate date available for Pleasanton, Dublin, or San Ramon.

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Hail Storm

November 10, 2003, about 2:07 PM.
It did not hail everywhere in Livermore, as evidenced by the fact that there was a rainbow at this time also.
The hail was slightly larger than pea sized. As you can see there was quite a lot of it.
This photo was taken north of Concannon, east of Isabel, near Max Baer Park..

Lunar Eclipse

May 15, 2003 Eclipse photos by Bill Nale, taken from Max Baer Park


Full Eclipse About 9:06	9:14	9:24	8:33	9:50	10:12

During a Lunar Eclipse, the moon comes between the moon and the sun causing the earth to cast a shadow on the moon. It is perfectly safe to view a Lunar Eclipse (unlike a Solar Eclipse). The following tables give the times for Livermore for the February 20, 2008 lunar eclipse. The times are the same for Pleasanton, except that the moonrise is one minute later.

	Feb 20, 2008
Moonrise	5:43 PM
Penumbral Eclipse begins	4:36.5 PM (prior to moonrise)
Partial Eclipse Begins	5:43.2 PM
Moon Enters Totality	7:00.5 PM
Middle of Eclipse	7:26.0 PM
Moon leaves totality	7:51.5 PM
Moon leaves umbra (all direct light from sun blocked by earth)	9:09.1 PM
Moon leaves penumbra (some direct light from sun blocked by earth)	10:17.2 PM

Lunar Eclipse Links: US Naval Observatory, Griffith Observatory

Precipitation

This Year
July 2009 to June 2010

Last Year
July 2008 to June 2009

July 2002 to June 2003
July 2003 to June 2004
July 2004 to June 2005
July 2005 to June 2006
July 2006 to June 2007
July 2007 to June 2008

Historical data
1876 to 2006

Daily precipitation in Livermore. Updated Weekly.
From the National Oceanic and Atmospheric Administration
(National Weather Service)
Provided by Ron Hafner of Livermore
See Award presentation to Ron by the National Weather Service
The rainfall year begins July 1 and goes through June 30.

July 2009 to June 2010
Through Sunday, March 14, 6:00PM
Key & Notes - Previous Year

Day	July 09	Aug	Sept	Oct	Nov	Dec	Jan 10	Feb	March	April	May	June
1	0	0	0	0	0	0	Trace	0	0
2	0	0	0	0	0	0	0	Trace	0.22
3	0	0	0	0	0	0	0	0.12	0.46
4	0	0	0	0	0	0	0	Trace	0
5	0	0	0	0	0	0	0	0.31	0
6	0	0	0	0	0	0.02	0	0.14	0
7	0	0	0	0	0	0.57	0	0	0
8	0	0	0	0	0	0	0.01	0	0.05
9	0	0	0	0	0	0	0	0.13	0.02
10	0	0	0	0	0	0.01	0	0	0.06
11	Trace	0	0	0	0	0.37	0	0	0
12	0	0	0.05	0	Trace	0.14	0.20	0	0.33
13	0	0	0	2.21	0	0.49	0.35	0	0.02
14	0	0	0.26	0.03	0	0.01	0	0
15	0	0	0	Trace	0	0	0	0
16	0	0	0	0	0	0.02	0	0
17	0	0	0	0	0	0	0.06	0
18	0	0	0	0	0	0	0.47	0
19	0	0	0	0.55	Trace	0	0.61	0
20	0	0	0	0	0.03	0	0.48	0
21	0	0	0	0	0.09	0.07	0.50	0.51
22	0	0	0	0	0	Trace	0.30	0.03
23	0	0	0	0	0	0	0.06	0.48
24	0	0	0	0	0	0	Trace	0.32
25	0	0	0	0	0	0	0.18	0
26	0	0	0	0	0	0.05	0.10	0.28
27	0	0	0	0	0.02	0.20	0	0.04
28	0	0	0	0	0.07	0.04	0	0
29	0	0	0	0	0	0.03	Trace
30	0	0	0	0	0	Trace	0.21
31	0	0		0		0	0

Monthly Totals	0	0	0.31	2.79	0.21	2.02	3.53	2.36	1.16	0	0	0
Monthly Average	0.02	0.04	0.24	0.69	1.63	2.64	2.94	2.49	2.18	1.07	0.48	0.11
Monthly compare	0%	0%	129%	402%	13%	77%	120%	95%	53%	0%	0%	0%

YTD totals	0	0	0.31	3.10	3.31	5.33	8.86	11.22	12.38	12.38	12.38	12.38
YTD Average	0.02	0.05	0.29	0.99	2.61	5.25	8.19	10.68	12.86	13.93	14.41	14.51
YTD compare	0%	0%	106%	315%	127%	102%	108%	105%	93%	89%	86%	85%

Key:

0	0 Precipitation on this day
x.xx	Inches of rainfall on this day
Trace	Trace amount (less than 0.01"). Counted as 0 in totals.
	Data not available for this day yet
	Day does not occur in this month.

Notes:

Data is updated weekly, generally on Sunday Evening.
Monthly Totals and Monthly Compare will be filled in once the month begins, and will be partial data during the month.
Yearly Totals and Yearly Compare will always be listed for every month even before the month begins. This provides useful information, such as "where are we with respect for the entire year rainfall wise", or "where will we be at the end of next month if it doesn't rain any more until then".
Averages are calculated by averaging data from 1870 to present, and are adjusted each year.

July 2008 to June 2009
Through Sunday, June 7, 6:00PM
Key & Notes - Previous Year

Day	July 08	Aug	Sept	Oct	Nov	Dec	Jan 09	Feb	March	April	May	June
1	0	0	0	0	.44	0	0	0	0.32	0	0.19	0
2	0	0	0	0	.48	0	0.07	0	0.19	0	0.14	0
3	0	0	0	0	.10	0	0	0	1.08	0	0.08	Trace
4	0	0	0	0.23	0	0	0	0	0.36	0	0	0.11
5	0	0	0	0	0	0	0.06	0.03	0.05	0	0	0
6	0	0	0	0	0	0	0	0.54	0	0	0	0
7	0	0	0	0	0	0	0	0.11	0	0.08	0	0
8	0	0	0	0	.01	0	Trace	0	0	Trace	0	0
9	0	0	0	0	.05	0	0	0.14	0	0.04	0	0
10	0	0	0	0	0	0	0	0	0	0.08	0	Trace
11	0	0	0	0	0	0	0	0.13	0	0	0	0
12	0	0	0	0	0	0	0	0.03	0	0	0	0
13	0	0	0	0	0	0	0	0.47	0	0	0	Trace
14	0	0	0	0	0	0.06	0	0.02	0	0.01	0	0
15	0	0	0	0	0	0.45	0	0.26	0	0.02	0	0
16	0	0	0	0	0	0.05	0	0.35	0	0	0	0
17	0	0	0	0	0	0	0	0.33	0	0	0	0
18	0	0	0	0	0	Trace	0	0.13	0	0	0	0
19	0	0	0	0	0	0.13	0	0	0	0	0	0
20	0	0	0	0	0	0	0	0	0	0	0	0
21	0	0	0	0	0	0.10	0.03	0	0.01	0	0	0
22	0	0	0	0	0	0.13	0.91	0.20	0.28	0	0	0
23	0	0	0	0	0	0.10	0.15	0.13	0	0	0	0
24	0	0	0	0	0	0.10	0.12	0.10	0	0	0	0
25	0	0	0	0	Trace	0.44	Trace	Trace	0	0	0	0
26	0	0	0	0	0.32	0	0	0.01	0	0	0	0
27	0	0	0	0	Trace	0	0	0	0	0	0	0
28	0	0	0	0	0	0	0	0	0	0	0	0
29	0	0	0	0	0	0	0		0	0	0	0
30	0	0	0	.07	0	0	0		0	0	0	0
31	0	0		0.03		0	0		0		0

Monthly Totals	0	0	0	0.33	1.40	1.56	1.34	3.31	2.29	0.23	0.41	0,11
Monthly Average	0.02	0.04	0.24	0.70	1.63	2.64	2.96	2.48	2.18	1.07	0.48	0.11
Monthly compare	0%	0%	0%	47%	86%	59%	45%	133%	105%	21%	86%	101%

YTD totals	0	0	0	0.23	1.73	3.29	4.63	7.94	10.23	10.46	10.87	10.98
YTD Average	0.02	0.05	0.29	0.99	2.62	5.26	8.22	10.70	12.88	13.96	14.43	14.54
YTD compare	0%	0%	0%	33%	66%	63%	56%	74%	79%	75%	75%	76%