Mount KatahdinWith regular features and information about climate in Maine and beyond, Maine Climate News is a joint effort of three of the University of Maine’s well-known units: the Climate Change InstituteMaine Sea Grant, and Cooperative Extension. All of these entities have an emphasis on climate change and its implications for Maine.

The site is intended to provide useful information and perspectives about Maine’s climate. Because climate represents long-term patterns (as opposed to the short-term weather records that are provided daily by the National Weather Service), we will review what is known about the past (paleoclimate), the present (weather data compiled from roughly the past century, the time of modern instrumental measurements), and the future (estimated from computer simulations of various kinds).

Climate Update: Summer 2019

By Sean D. Birkel, Ph.D., Maine State Climatologist

The Maine statewide 2019 JJA average temperature was 64.1 °F, ranking 33rd warmest for the 125-year record period beginning 1895. This temperature is 1.2 °F cooler than that observed for the same period in 2018, and 1.4 °F warmer than the 1901–2000 historical mean. The observed JJA total precipitation was 12.6 inches, ranking 36th wettest on record since 1895. This precipitation amount is 1.1 inches greater than that observed in 2018, and 1.6 inches above the 1901-2000 historical mean. In total, there were 18 high and 6 low daily temperature records, and 69 high precipitation records either broken or tied statewide during the summer season (for detailed lists see the National Center for Environmental Information [NCEI] Daily Weather Records).

View Full Summer 2019 Update Here

Climate Update: Spring 2018

By Sean D. Birkel, Ph.D., Maine State Climatologist

The statewide spring (March–May) 2018 season average was slightly warmer and drier than normal in comparison to 1901–2000 climatology. Spring snowpack at the beginning of April was less than in 2017, but considerably more than in 2016. On the larger scale, sea-surface temperatures across the subpolar and tropical latitudes of the North Atlantic cooled in response to persistent strong winds associated with the positive phase of the North Atlantic Oscillation.

View Full Spring 2018 Update Here

Climate Update: Winter and Spring 2017

Figure 9. Comparison of April 1 snowpack for 2016 and 2017. Image from the NWS National Hydrologic Remote Sensing Center (
Comparison of April 1 snowpack for 2016 and 2017. Image from the NWS National Hydrologic Remote Sensing Center.

By Sean D. Birkel, Maine State Climatologist

Following the record warmth in winter 2016, winter 2017 (December – February) was warm and wet. Spring 2017 was generally cool and wet. Increased snowfall and a longer snow season compared to last year contributed to easing of the 2016 drought. Climate in Maine and across the Northern Hemisphere is heavily impacted by the declining extent and thickness of Arctic sea ice.

View Full Winter and Spring 2017 Article Here

Research Highlights: Uncovering the Past Through Maine’s Historic Phenology Data

Phenological observations of annual first flowers, first leaves, and first migratory bird arrivals are a very valuable component of climate change research and historical phenology records provide baselines for learning about the effects of climate change on biota and biological processes. Dr. Caitlin McDonough’s research delves into long-term historical phenology records, such as the Quackenbush journals of northern Maine, to identify the fingerprint of anthropogenic climate change in ecological communities.

View the Full Article

Maine Climate and Agriculture

The purpose of the Maine Climate and Agriculture Network, initiated by faculty at the University of Maine, is to increase communication and coordination among those working on issues related to climate and agriculture. The Maine Climate and Ag Network website provides an initial portal to some of the climate-related activities at the University of Maine, and serves as an invitation to those with an interest in this topic to participate.

View the Farm Response to Changing Weather Fact Sheet

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