Weather in United States in June

June climate overview

Daytime highs across United States in June run from 25.5°C (New York) to 36.1°C (Las Vegas). In Las Vegas about 98% of June days reach 25°C. Nights average 22.5°C; the coldest 10% of nights in New York fall to 12°C or below.

Rainfall in June

Expect around 13 rainy days (1 mm or more) in June, with Las Vegas the driest (0 days) and Orlando the wettest (20 days). The wettest June at Las Vegas between 1991 and 2020 was 1993 with 10 mm; the driest was 2002 with 0 mm.

Sea temperature

The sea averages 25.3°C around United States in June - warmest at Florida (28.5°C). That is comfortable for swimming.

Sunshine and daylight

Around 6.8 hours of sunshine a day on average, out of 14.4 hours of daylight (sunshine estimated from cloud cover).

June against the rest of the year in United States

June is the 3rd warmest month of the twelve in United States. It is 2.5°C warmer than May and 1.4°C warmer in July. The hottest month here is July (31°C) and the coolest January (18°C).

Which part of United States in June?

• Most sunshine: Las Vegas, 12.1 h a day.
• Driest: Las Vegas, about 0 rainy days.
• Warmest sea: Florida, 29°C.
• Hottest: Las Vegas, 36°C by day - intense for sightseeing.
• Coolest (better for walking and cities): New York, 26°C.

What to pack for United States in June

Based on the averages: summer clothes for the day; a rain jacket - roughly 13 wet days; swimwear - the sea is 25°C.

Similar weather elsewhere in June

Within 1.5°C of United States's June daytime average: Kusadasi (31°C, sea 23°C), Ho Chi Minh City (31°C), Montego Bay (31°C, sea 29°C), Puerto Vallarta (31°C, sea 28°C), Chiang Mai (31°C). See the full ranking for June.

New York for milder days, Las Vegas for dry heat

New York is the more comfortable choice for travellers who want to spend time walking outdoors without the strongest heat. Days average 26°C and nights fall to 17°C, so light clothing works by day, with an extra layer useful after dark. Its 11 rainy days mean a flexible plan still helps. Las Vegas makes a different trade-off: 0 rainy days, but daytime temperatures of 36°C make midday a poor choice for prolonged outdoor activity. Move those plans towards the cooler parts of the day and allow for indoor breaks. Nights average 22°C, offering some relief without becoming particularly cool.

Florida suits warm-water swimming, with rain as the catch

Florida is a good fit if warm sea temperatures matter more to you than reliably dry weather. The sea averages 28°C in both Florida and Miami, making swimming a more inviting prospect than in New York. The catch is 20 rainy days across Florida, Miami and Orlando, so leave room to change outdoor plans rather than filling every day with weather-dependent activities. Daytime averages range from 29°C in Miami to 31°C in Orlando, while nights remain warm. Pack light clothing and rain protection, and favour accommodation where you can cool down comfortably. June here suits travellers who can accept rain alongside the warmth.

Hawaii offers a gentler balance of warmth and rain

Hawaii looks like the strongest balance for travellers wanting warm days, comfortable sea temperatures and fewer rainy days than Florida. Its daytime average of 27°C is less demanding than the heat in Las Vegas or Orlando, while the sea reaches 26°C. With 7 rainy days, rain still belongs in your plans, but it is less frequent than in the Florida destinations listed. Evenings offer little cooling, with nights averaging 24°C, so breathable clothing remains useful after sunset. Choose Hawaii if your priority is swimming and spending time outdoors without the highest daytime temperatures, rather than expecting completely dry weather or cool nights.