5 of 24 regions have the dry season in United States of America in April. These regions are Texas - Coast, Florida - Peninsula east, California - South coast, Nevada, Arizona - National parks. There are 10 of 24 regions in United States of America, which, according to April weather, belong to the tourist season. These are Texas - Coast, Florida - Northwest coast, Florida - Peninsula west, Florida - Peninsula east, South Carolina, California - West coast, California - South coast, Nevada, Arizona - National parks, Hawaii.

The lowest value of the day temperature in United States of America in April can be seen in Alaska with a value of 6.3 °C (43.3 °F). The day temperature in United States of America in April is the highest in Florida - Peninsula west - its value is 27.8 °C (82.1 °F).

The lowest night temperature in April in United States of America can be found in Colorado, where the value of night temperature is -6.6 °C (20.2 °F). The highest night temperature in United States of America in April can be found in Hawaii, where the value of night temperature is 19.0 °C (66.2 °F).

The sea temperature in April in United States of America is the lowest in Rhode Island - its value is 6.1 °C (43.0 °F). In United States of America in April - the region with the highest sea temperature is Florida - Peninsula east. The value in this region is 24.3 °C (75.7 °F).

The lowest number of rainy days in April in United States of America can be found in Nevada, where the value of number of rainy days is 2 days. The highest number of rainy days in April in United States of America can be found in Oregon, where the value of number of rainy days is 17 days.

The lowest rainfall amount in United States of America in April can be found in Nevada, where the value of rainfall amount is 5 mm (0.21 in). The highest rainfall amount in United States of America in April can be found in Oregon, where the value of rainfall amount is 156 mm (6.16 in).

The lowest wind speed in April in United States of America can be found in Great Smoky Mountains, where the value of wind speed is 3.3. The highest wind speed in United States of America in April can be found in Texas - Coast, where the value of wind speed is 5.8.

The lowest value of the humidity in April in United States of America can be seen in Nevada with a value of 28 %. The highest value of the humidity in April in United States of America can be seen in Oregon with a value of 79 %.

The number of sun hours (without clouds) in April in United States of America is the lowest in Washington - its value is 7 hours. In United States of America in April - the region with the highest number of sun hours (without clouds) is Nevada. The value in this region is 11 hours.

The lowest value of the clear sky percentage in United States of America in April can be seen in Washington with a value of 50 %. The clear sky percentage in United States of America in April is the highest in Nevada - its value is 87 %.

The lowest value of the day length in April in United States of America can be seen in Hawaii with a value of 13 hours. In April in United States of America - the region with the highest day length is Alaska. The value in this region is 14 hours.