2020 Spring Package

Analysis of 242 U.S. cities since 1970 shows that 81% have warmed by at least 1°F, with the highest increases in the Southwest. Additionally, 80% of 195 analyzed cities are experiencing their average last freeze earlier in the season, contributing to longer growing seasons and associated increases in seasonal allergies and pest activity.

• Since 1970, 81% (197) of the 242 analyzed cities in the U.S. have warmed by at least 1°F, with the most significant increases occurring in the Southwest. Specific top increases were recorded in Reno, Nev. (7.2°F), Las Vegas, Nev. (6.4°F), El Paso, Texas (5.8°F), and Tucson (5.8°F). Additionally, 79% (191 of 242) of cities in the Southwest saw an increase of 5 or more spring days above normal.
• Analysis of 195 cities indicates that 80% (156) are experiencing their average last freeze earlier in the season, and 54% (105) of those cities recorded a shift of more than a week earlier compared to 50 years ago.
• The extension of the growing season due to more days above freezing is linked to longer pest seasons and increased seasonal allergies, which affect up to 1 in 6 Americans and cost the U.S. between $2 and $5 billion annually.

APA

Climate Central (2020). 2020 Spring Package. https://www.climatecentral.org/climate-matters/2020-spring-package

Chicago

Climate Central. 2020 Spring Package. 2020. https://www.climatecentral.org/climate-matters/2020-spring-package.

Wikipedia

{{cite report |author=Climate Central |title=2020 Spring Package |date=24 February 2020 |url=https://www.climatecentral.org/climate-matters/2020-spring-package |access-date=23 October 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{climatecentral20202020, author = {{Climate Central}}, title = {{2020 Spring Package}}, institution = {Climate Central}, year = {2020}, month = feb, url = {https://www.climatecentral.org/climate-matters/2020-spring-package}, urldate = {2026-10-23}, note = {Indexed by Climate Insights Directory} }