Climatography of the United States No

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1 Climate Division: CA 4 NWS Call Sign: Month (1) Min (2) Month(1) Extremes Lowest (2) Temperature ( F) Lowest Month(1) Degree s (1) Base Temp 65 Heating Cooling 1 Number of s (3) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec <= 32 Min <= 32 Min <= Ann Jun Aug Dec Dec Also occurred on an earlier date(s) (1) From the Monthly Denotes mean number of days greater than but less than.5 (2) Derived from station s available digital record: Complete documentation available from: /oa/climate/normals/usnormals.html (3) Derived from serially complete daily data Issue Date: February A

. @. Apr 72.1 48.3 6.2 95+ 1996 3 64.7 1989 35+ 1967 2 54.4 1975 17 25..5 3.... May 76.7 51.8 64.3 11+ 21 31 69.7 1997 37 1952 4 59.3 1977 95 72.1 1.7 31.... Jun 81.8 55.4 68.6 19 2 14 73.

2 Climate Division: CA 4 NWS Call Sign: Precipitation (inches) Month s/ Medians(1) Median (2) Precipitation Totals Extremes Monthly(1) Lowest Monthly(1).1 Number of s (3) Precipitation Precipitation Probabilities (1) Probability that the monthly/annual precipitation will be equal to or less than the indicated amount Monthly/Annual Precipitation vs Probability Levels These values were determined from the incomplete gamma distribution Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann Jan Feb Jul Also occurred on an earlier date(s) (1) From the Monthly Normals # Denotes amounts of a trace (2) Derived from station s available digital record: Denotes mean number of days greater than but less than.5 (3) Derived from serially complete daily data ** Statistics not computed because less than six years out of thirty had measurable precipitation Complete documentation available from: /oa/climate/normals/usnormals.html 21-B

were determined from the incomplete gamma distribution.5.1.2.3.4.5.6.7.8.9.95 Jan 3.3 2.46 3.6 1968 3 8.66 1995.17 1984 1.2 6.6 1.9.7.26.46.87 1.29 1.75 2.27 2.9 3.69 4.78 6.6 8.39 Feb 2.84 2.16 2.

3 s Climate Division: CA 4 NWS Call Sign: Month s/medians (1) Extremes (2) Median Median (inches) Totals Number of s (1) Monthly Monthly Thresholds Thresholds Jan #. # # Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec #. # # Ann #. N/A N/A.5 Feb Feb + Also occurred on an earlier date(s) #Denotes trace amounts (1) Derived from Climatology and daily Denotes mean number of days greater than but less than.5 (2) Derived from daily data -9/-9.9 represents missing values Complete documentation available from: Annual statistics for /Median snow depths are not appropriate /oa/climate/normals/usnormals.html 21-C

............ Dec #. # 1988 3 #+ 1988......... Ann #. N/A N/A.5 Feb 1976 5.5 Feb 1976 @.

4 Climate Division: CA 4 NWS Call Sign: Temp (F) Freeze Data Spring Freeze Dates (Month/) Probability of later date in spring (thru Jul 31) than indicated(*) /17 3/6 2/26 2/19 2/13 2/7 1/31 1/23 1/ /1 2/1 1/24 1/18 1/11 1/4 12/27 12/11 / 28 1/16 12/3 12/7 / / / / / / 24 / / / / / / / / / 2 / / / / / / / / / 16 / / / / / / / / / Temp (F) Freeze Dates (Month/) Probability of earlier date in fall (beginning Aug 1) than indicated(*) /31 11/1 11/17 11/23 11/29 12/4 12/1 12/17 12/ /24 12/5 12/12 12/19 12/26 1/2 1/11 1/28 / 28 12/14 12/3 1/2 / / / / / / 24 / / / / / / / / / 2 / / / / / / / / / 16 / / / / / / / / / Temp (F) Freeze Free Period Probability of longer than indicated freeze free period (s) >365 >365 >365 > >365 >365 >365 >365 >365 >365 >365 >365 > >365 >365 >365 >365 >365 >365 >365 >365 >365 2 >365 >365 >365 >365 >365 >365 >365 >365 > >365 >365 >365 >365 >365 >365 >365 >365 >365 * Probability of observing a temperature as cold, or colder, later in the spring or earlier in the fall than the indicated date. / Indicates that the probability of occurrence of threshold temperature is less than the indicated probability. Derived from serially complete daily data Complete documentation available from: /oa/climate/normals/usnormals.html 21-D

Dates (Month/) Probability of earlier date in fall (beginning Aug 1) than indicated(*).1.2.3.4.5.6.7.8.

5 Climate Division: CA 4 NWS Call Sign: Degree s to Selected Base Temperatures ( F) Base Heating Degree s (1) Below Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann Base Cooling Degree s (1) Above Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann Growing Degree Units (2) Base Growing Degree Units (Monthly) Growing Degree Units (Accumulated Monthly) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Base Growing Degree Units for Corn (Monthly) Growing Degree Units for Corn (Accumulated Monthly) 5/ (1) Derived from the Monthly Normals Complete documentation available from: (2) Derived from serially complete daily data /oa/climate/normals/usnormals.html Note: For corn, temperatures below 5 are set to 5, and temperatures above 86 are set to E

Aug Sep Oct Nov Dec Ann 32 573 617 765 845 1 198 127 124 1123 995 73 556 1686 55 22 5 112 178 293 48 494 491 433 284 8 28 2873 57 11 28 79 135 237 348 432 429 373 226 51 16 2365 6 4 1 4 83 162 261

6 Notes a. The monthly means are simple arithmetic averages computed by summing the monthly values for the period and dividing by thirty. Prior to averaging, the data are adjusted if necessary to compensate for data quality issues, station moves or changes in station reporting practices. Missing months are replaced by estimates based on neighboring stations. b. The median is defined as the middle value in an ordered set of values. The median is being provided for the snow and precipitation elements because the mean can be a misleading value for precipitation normals. c. Only observed validated values were used to select the extreme daily values. d. Extreme monthly temperature/precipitation means were selected from the monthly normals data. Monthly snow extremes were calculated from daily values quality controlled to be consistent with the Climatology. e. Degree s were derived using the same techniques as the normals. Compete documentation for the Normals is available on the internet from: /oa/climate/normals/usnormals.html f. number of days statistics for temperature and precipitation were calculated from a serially complete daily data set. Documentation of the serially complete data set is available from the link below: g. fall and snow depth statistics were derived from the Climatology. Documentation for the Climatology project is available from the link under references. Data Sources for Tables Several different data sources were used to create the Clim2 climate summaries. In some cases the daily extremes appear inconsistent with the monthly extremes and or the mean number of days statistics. For example, a high daily extreme value may not be reflected in the highest monthly value or the mean number of days threshold that is less than and equal to the extreme value. Some of these difference are caused by different periods of record. extremes are derived from the station s entire period of record while the serial data and normals data were are for the period. Therefore extremes observed before 1971 would not be included in the normals or the serial daily data set. Inconsistencies can also occur when monthly values are adjusted to reflect the current observing conditions or were replaced during the Monthly Normals processing and are not reconciled with the Summary of the data. a. Temperature/ Precipitation Tables c. Tables 1. Monthly Normals 1. Climatology 2. Cooperative Summary of the 2. Cooperative Summary of the 3. National Weather Service station records 4. serially complete daily data d. Freeze Data Table serially complete daily data b. Degree Table 1. Monthly and Annual Heating and Cooling Degree s Normals to Selected Bases derived from Monthly Normals 2. Normal Growing Degree Units to Selected Base Temperatures derived from serially complete daily data References U.S. Climate Normals, /normals.html U.S. Climate Normals -Products Clim2, /oa/climate/normals/usnormalsprods.html Climatology Project Description, /oa/climate/monitoring/snowclim/mainpage.html Eischeid, J. K., P. Pasteris, H. F. Diaz, M. Plantico, and N. Lott, 2: Creating a serially complete, national daily time series of temperature and precipitation for the Western United States. J. Appl. Meteorol., 39, , www1.ncdc.noaa.gov/pub/data/special/ serialcomplete_jam_9.pdf

Missing months are replaced by estimates based on neighboring stations. b. The median is defined as the middle value in an ordered set of values.

Climatography of the United States No. 20 1971-2000

Climatography of the United States No. 20 1971-2000 Climate Division: CA 6 NWS Call Sign: SAN Month (1) Min (2) Month(1) Extremes Lowest (2) Temperature ( F) Lowest Month(1) Degree s (1) Base Temp 65 Heating Cooling 100 Number of s (3) Jan 65.8 49.7 57.8