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Summer Minimum & Maximum Temperatures in the U.S.

By Climate Central

Happy Mother’s Day! This special holiday marks the beginning of planting season in many locations in the U.S., and the holiday is often celebrated with the gift of flowers. But as the world continues to warm from climate change, an important pollinator of flowers and other plants is at risk — hummingbirds.

Pollinators are important not just for flowers, but for agriculture in general. And large farming operations have an impact on the climate. Large-scale farming may be responsible for masking the trend of warming summers in parts of the U.S. Tremendous amounts of water are released by the leaves in mature corn fields, and the evaporation of that water into the atmosphere has a cooling effect. The only location where a cooling trend has been observed in summertime high temperatures has been in the Midwest, where most of the U.S. corn is grown. But even there, the nights are continuing to warm.

Methodology: See the trend in average summer temperatures and summertime low temperatures in your city in our media library. Summer trends in maximum and minimum temperatures are calculated using NCEI climate division records since 1970.

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