Honolulu

==Climate==
Honolulu experiences a [[Semi-arid climate|hot semi-arid climate]] ([[Köppen classification]] ''BSh''), with a mostly dry summer season, due to a [[rain shadow]] effect.<ref>{{Cite web|title=Monthly weather forecast and climate Honolulu, HI|url=https://www.weather-us.com/en/hawaii-usa/honolulu-climate|publisher=Weather Atlas|access-date=April 1, 2020}}</ref> Despite temperatures that meet the tropical threshold of all months having a mean temperature of 64.4&nbsp;°F (18.0&nbsp;°C) or higher, the city receives too little precipitation to be classified as tropical.

Temperatures vary little throughout the year, with average high temperatures of {{convert|80|–|90|°F|°C}} and average lows of {{convert|65|–|75|°F|°C}}. Nevertheless, there are slight seasons. The "winter" months from December to March can occasionally see lows fall below {{convert|64|°F|0}}, whereas the "summer" from June to September can get a limited number of hot days achieving {{convert|90|°F|0}} or higher. This occurs on an average of only 32 days annually,<ref name = NOAA/>{{efn|There have been as many as 116&nbsp;days (in 1995) that reached {{convert|90|°F|0}}, and as recently as, 2012, no days.<ref name = NOAA/> The average is comparable to Philadelphia despite being slightly warmer during the summer.}} with lows in the upper 50s °F (14–15&nbsp;°C) once or twice a year. The highest recorded temperature was {{convert|95|°F}} on September 19, 1994, and August 31, 2019.<ref name = NOAA/> The lowest recorded temperature was {{convert|52|°F}} on February 16, 1902, and January 20, 1969.<ref name = NOAA/>

The annual average rainfall is {{convert|16.41|in|mm|abbr=off|sp=us}},<ref name = NOAA/> which mainly occurs from October through early April, with very little rainfall in the summer. However, both seasons experience a similar number of rainy days. Light showers occur in summer, while heavier rain falls during winter. Honolulu has an average of 278 sunny days and 89.2 rainy days per year.

Although the city is in the tropics, [[hurricane|hurricanes]] are quite rare. The last recorded hurricane that hit near Honolulu was Category 4 [[Hurricane Iniki]] in 1992. [[Tornado]]es are also uncommon and occur about every 15 years. [[Waterspout]]s off the coast are also uncommon, hitting about every five years.<ref>{{cite web |url= http://www.weatherbase.com/weather/weatherall.php3?s=28119&refer=&units=us |title=Weatherbase.com |publisher= Weatherbase.com |access-date=May 22, 2012}}</ref>

Honolulu falls under the [[USDA]] 12b Plant [[Hardiness zone]].<ref>USDA.gov{{cite web
 |url          = http://planthardiness.ars.usda.gov/PHZMWeb/#
 |title        = USDA Plant Hardiness Zone Map
 |website      = USDA
 |access-date  = August 31, 2016
|archive-url  = https://web.archive.org/web/20140227032333/http://planthardiness.ars.usda.gov/PHZMWeb/
 |archive-date = February 27, 2014
|url-status     = dead
 |df           = mdy-all
}}</ref>

The average temperature of the sea ranges from {{convert|75.7|°F}} in March to {{convert|80.4|°F}} in September.<ref>{{cite web|url=http://www.seatemperature.org/north-america/united-states/honolulu-october.htm|title=Honolulu Sea Temperature October Average, United States – Sea Temperatures|website=World Sea Temperatures}}</ref>
{{Honolulu_weatherbox}}

{|style="width:100%;text-align:center;line-height:1.2em;margin-left:auto;margin-right:auto" class="wikitable mw-collapsible mw-collapsed"
|-
!Colspan=14|Climate data for Honolulu
|-
!Month
!Jan
!Feb
!Mar
!Apr
!May
!Jun
!Jul
!Aug
!Sep
!Oct
!Nov
!Dec
!style="border-left-width:medium"|Year
|-
!Average sea temperature °F (°C)
|style="background:#FF6700;color:#000000;"|76.5<br />(24.7)
|style="background:#FF6D00;color:#000000;"|75.9<br />(24.4)
|style="background:#FF6F00;color:#000000;"|75.7<br />(24.3)
|style="background:#FF6200;color:#000000;"|76.9<br />(25.0)
|style="background:#FF5800;color:#000000;"|77.9<br />(25.5)
|style="background:#FF5000;color:#000000;"|78.7<br />(25.9)
|style="background:#FF4E00;color:#000000;"|78.9<br />(26.0)
|style="background:#FF4600;color:#000000;"|79.5<br />(26.4)
|style="background:#FF3C00;color:#000000;"|80.4<br />(26.9)
|style="background:#FF4400;color:#000000;"|79.8<br />(26.5)
|style="background:#FF5000;color:#000000;"|78.5<br />(25.9)
|style="background:#FF6200;color:#000000;"|77.0<br />(25.0)
|style="background:#FF5700;color:#000000;border-left-width:medium"|78.0<br />(25.5)
|-
!Mean daily daylight hours
|style="background:#F7F722;color:#000000;"|11.0
|style="background:#F7F722;color:#000000;"|11.0
|style="background:#FFFF33;color:#000000;"|12.0
|style="background:#FFFF44;color:#000000;"|13.0
|style="background:#FFFF44;color:#000000;"|13.0
|style="background:#FFFF44;color:#000000;"|13.0
|style="background:#FFFF44;color:#000000;"|13.0
|style="background:#FFFF44;color:#000000;"|13.0
|style="background:#FFFF33;color:#000000;"|12.0
|style="background:#FFFF33;color:#000000;"|12.0
|style="background:#F7F722;color:#000000;"|11.0
|style="background:#F7F722;color:#000000;"|11.0
|style="background:#FFFF34;color:#000000;border-left-width:medium"|12.1
|-
!Average [[Ultraviolet index]]
|style="background:#f85900;color:#000000;"|7
|style="background:#d8001d;color:#000000;"|9
|style="background:#6b49c8;color:#FFFFFF;"|11
|style="background:#6b49c8;color:#FFFFFF;"|11
|style="background:#6b49c8;color:#FFFFFF;"|11
|style="background:#6b49c8;color:#FFFFFF;"|11+
|style="background:#6b49c8;color:#FFFFFF;"|11+
|style="background:#6b49c8;color:#FFFFFF;"|11+
|style="background:#6b49c8;color:#FFFFFF;"|11
|style="background:#d8001d;color:#000000;"|9
|style="background:#f85900;color:#000000;"|7
|style="background:#f85900;color:#000000;"|6
|style="background:#d8001d;color:#000000;border-left-width:medium"|9.6
|-
!Colspan=14 style="background:#f8f9fa;font-weight:normal;font-size:95%;"|Source #1: seatemperature.org<ref name="seatemperature">{{cite web |url=http://www.seatemperature.org/north-america/united-states/honolulu-january.htm |title=Honolulu Sea Temperature January Average, United States Water Temperatures |publisher=Copyright Global Sea Temperatures – A-Connect Ltd |access-date=November 26, 2015 }}</ref>
|-
!Colspan=14 style="background:#f8f9fa;font-weight:normal;font-size:95%;"|Source #2: Weather Atlas<ref name="Weather Atlas">{{cite web |url=https://www.weather-us.com/en/hawaii-usa/honolulu-climate |title=Honolulu, Hawaii, USA – Monthly weather forecast and Climate data |publisher=Weather Atlas |access-date=March 16, 2017 }}</ref>
|}

{{Graph:Weather monthly history
| table=ncei.noaa.gov/weather/Honolulu.tab
| title=Honolulu monthly weather statistics
}}

{{Panorama
| image = File:Honolulu waterfront.JPG
| fullwidth = 2000
| fullheight = 152
| caption = Panorama of Honolulu's waterfront in February 2007
| height = 152
}}
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