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Temperatures in New Hampshire have risen more than 3°F since the beginning of the 20th century. Under a higher emissions pathway, historically unprecedented warming is projected during this century. Warming has increased more in the winter than in any other season. Future winter warming will have large effects on snowfall and snow cover.
- Introduction
- Signs of Winter Warming
- Who Notices Winter Warming?
- Discussion
Since 1895, New Hampshire’s average winter temperatures (December through March) have warmed by more than 4 degrees Fahrenheit, with broad impacts on many aspects of daily life, from snow shoveling and gardening to participating in—and running businesses sustained by—winter sports. The warming trend follows rising greenhouse gases: since the 1970s,...
Figure 1 plots New Hampshire average winter temperature anomalies (deviations from the 1901–2000 mean) for 1895/1896 to 2018/2019. The two warmest winters of the past decade set new records, and the coldest of recent winters were still warmer than many in the first half of the 20th century. Winter temperatures swing widely from one year to the next...
Are older residents or winter sports participants more likely than other people to have noticed the warming trend? What else might make a difference? To explore such questions, we turned to the University of New Hampshire Survey Center’s Granite State Poll (GSP), which conducts telephone interviews with random samples of about 500 state residents f...
High-quality temperature records in New Hampshire clearly indicate a robust and significant winter warming trend over the last 40 years, yet fewer than half of the respondents on a statewide survey were aware of this warming. It is possible, of course, that subjective impressions of winter warming (or the lack thereof) might be more responsive to t...
Mar 13, 2024 · The average temperature for meteorological winter – December through February – was 28 degrees. That’s almost 9 degrees warmer than an average winter between 1896 and 2000. Melting ice and slushy...
- Mara Hoplamazian
Average Winter High and Low Temperature in New Hampshire. Dec Jan Feb -10°F -10°F 0°F 0°F 10°F 10°F 20°F 20°F 30°F 30°F 40°F 40°F 50°F 50°F Fall Spring 28 20 16 23 42 34 33 39 30 23 20 25 18 8 3 10 34 26 25 31 22 12 8 15 40 30 28 35 11 -2 -8 0 Portsmouth Portsmouth Manchester Manchester Berlin Berlin.
New Hampshire has a mix of continental climates (wet continental climate type Dfb and an alpine climate on the highest peaks of the White Mountains) In the lower situated areas winters are cool and summers are warm. During the summer temperatures may rise above 30 degrees Celsius (86 degrees Fahrenheit).
Mean winter temperature has warmed faster than global average, by about 2.1 °C (3.8 °F).(1). While the whole state has seen a steady decline in snowfall, snow loss is particularly prominent in southern New Hampshire.
