Editing New Hampshire (section)

===Climate===
New Hampshire experiences a [[humid continental climate]] ([[Köppen climate classification]] ''Dfa'' in some southern areas, ''Dfb'' in most of the state, and ''Dfc'' subarctic in some northern highland areas), with warm, humid summers, and long, cold, and snowy winters. Precipitation is fairly evenly distributed all year. The climate of the southeastern portion is moderated by the [[Atlantic Ocean]] and averages relatively milder winters (for New Hampshire), while the northern and interior portions experience colder temperatures and lower humidity. Winters are cold and snowy throughout the state, and especially severe in the northern and mountainous areas. Average annual snowfall ranges from {{convert|60|in|cm}} to over {{convert|100|in|cm}} across the state.<ref name="noaasnow">{{cite web| url=http://lwf.ncdc.noaa.gov/oa/climate/online/ccd/snowfall.html |title=Snowfall—Average Total in Inches |publisher=[[NOAA]] |date=June 23, 2004 |first=Dan |last=Dellinger |access-date=May 25, 2007 |url-status=dead |archive-url=https://web.archive.org/web/20110619061102/http://www.governor.nh.gov/media/news/2011/061511-hb218.htm |archive-date=June 19, 2011 }}</ref>

Average daytime highs are in the mid 70s°F to low 80s°F (24–28&nbsp;°C) throughout the state in July, with overnight lows in the mid 50s°F to low 60s°F (13–15&nbsp;°C). January temperatures range from an average high of {{convert|34|F|C}} on the coast to overnight lows below {{convert|0|F|C}} in the far north and at high elevations. Average annual precipitation statewide is roughly {{convert|40|in|cm}} with some variation occurring in the [[White Mountains (New Hampshire)|White Mountains]] due to differences in elevation and annual snowfall. New Hampshire's highest recorded temperature was {{convert|106|F|C}} in [[Nashua, New Hampshire|Nashua]] on July 4, 1911, while the lowest recorded temperature was {{convert|-47|F|C}} atop [[Mount Washington (New Hampshire)|Mount Washington]] on January 29, 1934. Mount Washington also saw an unofficial {{convert|-50|F|C}} reading on January 22, 1885, which, if made official, would tie the record low for New England (also {{convert|-50|F|C}} at [[Big Black River (Saint John River)|Big Black River]], Maine, on January 16, 2009, and [[Bloomfield, Vermont]] on December 30, 1933).

Extreme snow is often associated with a [[nor'easter]], such as the [[Northeastern United States blizzard of 1978|Blizzard of '78]] and the [[Blizzard of 1993]], when several feet accumulated across portions of the state over 24 to 48 hours. Lighter snowfalls of several inches occur frequently throughout winter, often associated with an [[Alberta Clipper]].

New Hampshire, on occasion, is affected by [[tropical cyclone|hurricanes]] and tropical storms—although, by the time they reach the state, they are often [[extratropical]]—with most storms striking the southern New England coastline and moving inland or passing by offshore in the [[Gulf of Maine]]. Most of New Hampshire averages fewer than 20 days of thunderstorms per year and an average of two tornadoes occur annually statewide.<ref name="noaatornado">{{cite web |title=Annual average number of tornadoes 1953–2004 |url=http://www.ncdc.noaa.gov/img/climate/research/tornado/small/avgt5304.gif |publisher=NOAA |access-date=May 25, 2007 |archive-url=https://web.archive.org/web/20111016174155/http://www.ncdc.noaa.gov/img/climate/research/tornado/small/avgt5304.gif |archive-date=October 16, 2011 |url-status=live }}</ref>

The [[National Arbor Day Foundation]] plant [[hardiness zone]] map depicts zones 3, 4, 5, and{{spaces}}6 occurring throughout the state<ref name="arborday">{{cite web |url=http://www.arborday.org/media/zones.cfm |title=2006 arborday.org Hardiness Zone Map |publisher=[[National Arbor Day Foundation]] |access-date=May 25, 2007 |archive-url=https://web.archive.org/web/20110217032828/http://www.arborday.org/media/zones.cfm |archive-date=February 17, 2011 |url-status=dead }}</ref> and indicates the transition from a relatively cooler to warmer climate as one travels southward across New Hampshire. The 1990 [[USDA]] plant [[hardiness zone]]s for New Hampshire range from zone 3b in the north to zone 5b in the south.<ref>{{cite web |url=http://www.plantmaps.com/interactive-new-hampshire-usda-plant-zone-hardiness-map.php |title=New Hampshire USDA Plant Hardiness Zone Map |website=PlantMaps |access-date=November 15, 2010 |archive-url=https://web.archive.org/web/20101208015547/http://www.plantmaps.com/interactive-new-hampshire-usda-plant-zone-hardiness-map.php |archive-date=December 8, 2010 |url-status=live }}</ref>

{| class="wikitable sortable" style="margin:auto;"
|+ Average daily maximum and minimum temperatures for selected cities in New Hampshire<ref name="New Hampshire climate averages">{{cite web |url=http://www.weatherbase.com/weather/city.php3?c=US&s=NH&statename=New-Hampshire-United-States-of-America |title=New Hampshire climate averages |publisher=Weatherbase |access-date=November 21, 2015 |archive-url=https://web.archive.org/web/20151122004250/http://www.weatherbase.com/weather/city.php3?c=US&s=NH&statename=New-Hampshire-United-States-of-America |archive-date=November 22, 2015 |url-status=live }}</ref>
|-
!Location
!July (°F)
!July (°C)
!January (°F)
!January (°C)
|-
|[[Manchester, New Hampshire|Manchester]] || 82/64 || 28/17 || 33/15 || 0/−9
|-
|[[Nashua, New Hampshire|Nashua]] || 82/59 || 28/15 || 33/12 || 0/−11
|-
|[[Concord, New Hampshire|Concord]] || 82/57 || 28/14 || 30/10 ||{{spaces}}−1/−12
|-
|[[Portsmouth, New Hampshire|Portsmouth]] || 79/61 || 26/16 || 32/16 || 0/−9
|-
|[[Keene, New Hampshire|Keene]] || 82/56 || 28/13 || 31/9 ||{{spaces}}−1/−12
|-
|[[Laconia, New Hampshire|Laconia]] || 81/60 || 27/16 || 30/11 ||{{spaces}}−1/−11
|-
|[[Lebanon, New Hampshire|Lebanon]] || 82/58 || 28/14 || 30/8 || −1/−13
|-
|[[Berlin, New Hampshire|Berlin]] || 78/55 || 26/13 || 27/5 || –3/–15
|}