Editing Vacaville, California (section)

==Geography==
Vacaville is surrounded by the Vaca Mountains to the south and to the west and the Sacramento Valley to the north and to the east.

A number of [[rare species|rare]] and [[endangered species]] occur in the Vacaville area. Endangered plants, which have historically occurred in the vernal pool areas in and around Vacaville include ''[[Legenre limosa]]'', ''[[Plagiobothrys hystriculus]]'', ''[[Downingia humilis]]'', Contra Costa goldfields (''[[Lasthenia conjugens]]''), and showy Indian clover (''[[Trifolium amoenum]]'').<ref>''Environmental Assessment for the Green Tree Assessment District'', Earth Metrics Inc Report 7690, City of Vacaville, March 1989</ref>  To this day [[Trifolium amoenum]] can still be found in [[Lagoon Valley Regional Park]].

According to the [[United States Census Bureau]], the city has a total area of {{convert|28.6|sqmi|km2}}, of which 0.74% is covered by water. Excluding the [[Putah South Canal]] and minor local [[stream|creek]]s, the only significant body of water within the city is the {{convert|105|acre|km2|adj=on}} Lagoon Valley Lake.

The unincorporated communities of [[Allendale, Solano County, California|Allendale]] and [[Elmira, California|Elmira]] are generally considered to be part of "greater" Vacaville.

===Climate===
Vacaville has a typical [[Mediterranean climate]] ([[Köppen climate classification|Köppen]] ''Csa'') with hot, dry summers and cool, wet winters. Characteristic of inland California, summers can get quite hot. Autumns are warm in the early part, but quickly cool down as the wet season approaches. Winters can be cool, and often foggy, but are mild compared to other regions. Spring is a rather pleasant season with fairly mild temperatures and not so much rain. The greater majority of precipitation falls in the autumn, winter, and spring, little to none in summer.

The wettest year was 1983 with {{convert|48.9|in|mm}} and the driest year was 2012 with 5.0 inches. The most precipitation in one month was {{convert|19.83|in|mm}} in January 1916. The most precipitation in 24 hours was {{convert|6.10|in|mm}} on February 27, 1940. Snowfall is rare in Vacaville, but light measurable amounts have occurred, including {{convert|2.2|in|mm}} in January 1907 and {{convert|2.0|in|mm}} in December 1988.<ref>{{cite web|url=http://www.wrcc.dri.edu/cgi-bin/cliMAIN.pl?ca9200|title=VACAVILLE, CALIFORNIA|access-date=October 2, 2014}}</ref>

{{Weather box
|location = Vacaville, California, 1991–2020 normals, extremes 1998–present
|single line = Yes

|Jan record high F = 78
|Feb record high F = 85
|Mar record high F = 88
|Apr record high F = 97
|May record high F = 106
|Jun record high F = 112
|Jul record high F = 115
|Aug record high F = 111
|Sep record high F = 115
|Oct record high F = 104
|Nov record high F = 89
|Dec record high F = 76

|Jan avg record high F = 69.5
|Feb avg record high F = 74.7
|Mar avg record high F = 80.1
|Apr avg record high F = 89.4
|May avg record high F = 96.6
|Jun avg record high F = 105.7
|Jul avg record high F = 107.4
|Aug avg record high F = 105.9
|Sep avg record high F = 103.6
|Oct avg record high F = 91.9
|Nov avg record high F = 81.0
|Dec avg record high F = 68.6
|year avg record high F = 109.2

|Jan high F = 57.6
|Feb high F = 63.0
|Mar high F = 68.5
|Apr high F = 74.9
|May high F = 82.8
|Jun high F = 90.7
|Jul high F = 97.3
|Aug high F = 96.5
|Sep high F = 91.9
|Oct high F = 81.2
|Nov high F = 67.0
|Dec high F = 57.9
|year high F =

|Jan mean F = 48.6
|Feb mean F = 52.6
|Mar mean F = 56.6
|Apr mean F = 61.5
|May mean F = 67.8
|Jun mean F = 74.2
|Jul mean F = 78.7
|Aug mean F = 78.0
|Sep mean F = 74.7
|Oct mean F = 66.5
|Nov mean F = 55.8
|Dec mean F = 48.7
|year mean F =

|Jan low F = 39.6
|Feb low F = 42.2
|Mar low F = 44.8
|Apr low F = 48.0
|May low F = 52.9
|Jun low F = 57.7
|Jul low F = 60.2
|Aug low F = 59.5
|Sep low F = 57.5
|Oct low F = 51.8
|Nov low F = 44.5
|Dec low F = 39.5
|year low F =

|Jan avg record low F = 27.3
|Feb avg record low F = 30.9
|Mar avg record low F = 34.3
|Apr avg record low F = 37.5
|May avg record low F = 44.2
|Jun avg record low F = 49.1
|Jul avg record low F = 52.9
|Aug avg record low F = 52.7
|Sep avg record low F = 47.0
|Oct avg record low F = 40.9
|Nov avg record low F = 31.4
|Dec avg record low F = 26.9
|year avg record low F = 24.7

|Jan record low F = 18
|Feb record low F = 24
|Mar record low F = 29
|Apr record low F = 32
|May record low F = 34
|Jun record low F = 43
|Jul record low F = 49
|Aug record low F = 48
|Sep record low F = 41
|Oct record low F = 33
|Nov record low F = 25
|Dec record low F = 17

|precipitation colour = green
|Jan precipitation inch = 5.55
|Feb precipitation inch = 5.14
|Mar precipitation inch = 3.37
|Apr precipitation inch = 1.23
|May precipitation inch = 0.78
|Jun precipitation inch = 0.22
|Jul precipitation inch = 0.00
|Aug precipitation inch = 0.06
|Sep precipitation inch = 0.13
|Oct precipitation inch = 1.01
|Nov precipitation inch = 2.44
|Dec precipitation inch = 5.67
|year precipitation inch = 25.60

|unit precipitation days = 0.01 in
|Jan precipitation days = 12.0
|Feb precipitation days = 11.0
|Mar precipitation days = 8.4
|Apr precipitation days = 5.0
|May precipitation days = 3.7
|Jun precipitation days = 1.1
|Jul precipitation days = 0.1
|Aug precipitation days = 0.2
|Sep precipitation days = 0.5
|Oct precipitation days = 2.6
|Nov precipitation days = 6.5
|Dec precipitation days = 10.5

|Jan snow inch = 
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|unit snow days = 0.1 in
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|source 1 = NOAA<ref name = NOAA>
{{cite web
|url = https://www.ncei.noaa.gov/access/services/data/v1?dataset=normals-monthly-1991-2020&stations=USC00049200&format=pdf&dataTypes=MLY-TMAX-NORMAL,MLY-TMIN-NORMAL,MLY-TAVG-NORMAL,MLY-PRCP-NORMAL,MLY-SNOW-NORMAL
|publisher = National Oceanic and Atmospheric Administration
|title = U.S. Climate Normals Quick Access – Station: Vacaville, CA
|access-date = May 23, 2023
}}
</ref>
|source 2 = National Weather Service (mean maxima/minima 2006&ndash;2020)<ref name = NOWData>
{{cite web
|url = https://www.weather.gov/wrh/climate?wfo=sto
|publisher = National Weather Service
|title = NOAA Online Weather Data – NWS Sacramento
|access-date = May 23, 2023
}}
</ref>
}}