The average Low Temperature & average high Temperature for the month of May is 65 to 80 degrees Fahrenheit (18 to 27 degrees Celsius). Most large US cities in May have pleasantly warm days. The weather gets hotter than elsewhere in Texas, Florida, and southern Arizona. Daily highs for many cities in Texas and Florida average above 80 °F (27 °C), while Phoenix regularly gets over 90 °F (32 °C) this month.
Above-average May temperatures prevailed from the Pacific Northwest to Texas and across parts of Florida. New Mexico ranked fourth warmest while Arizona ranked fifth warmest.
This monthly table from NOAA National Centers for Environmental Information is part of the suite of climate services NOAA provides to government, business, academia and the public to support informed decision-making.