Best Weather by Month in the U.S.

January

Best Weather in the U.S. in January →

January rankings consistently favor the southern United States. The Southeast, southern Texas, Arizona, and coastal California post the highest PWI scores, with milder temperatures and clearer skies than northern regions. The Midwest and Northeast contend with persistent cold and snow, while desert regions — particularly the Southwest — deliver some of their most stable and comfortable winter conditions.

February

Best Weather in the U.S. in February →

February remains a winter month across most of the country, but early signs of change appear in the South. The Gulf Coast and desert Southwest continue to rank among the top-performing regions. Daylight is increasing, and southern states occasionally see warming trends that push PWI scores higher. Northern regions remain active with storm systems, though brief windows of stable weather do occur between fronts.

March

Best Weather in the U.S. in March →

March marks the beginning of spring across the South and Southwest. Arizona, Texas, and parts of California see improving temperatures and declining winter storm activity. In the central and eastern U.S., however, variability remains high — frontal systems stay active and conditions can shift quickly. PWI scores reflect this contrast, with the Southwest and South holding a clear edge early in the month.

April

Best Weather in the U.S. in April →

April is one of the more broadly favorable months across the country. Temperatures moderate across the South and Mid-Atlantic, the Southwest remains comfortable, and northern regions begin their transition out of winter. While storm systems are still common, stable periods between them tend to be longer and more widespread than in March. April consistently produces strong PWI scores across a wide geographic range.

May

Best Weather in the U.S. in May →

May is among the best months for weather across the United States. Temperatures settle into comfortable ranges in most regions, and much of the country avoids both winter cold and peak summer heat. Thunderstorms can develop in the Plains and Southeast, but extended stretches of stable weather are common. PWI scores in May tend to be strong nationwide, making it one of the most consistently favorable months for travel and outdoor activity.

June

Best Weather in the U.S. in June →

June marks the arrival of summer, but not all regions experience it equally. Northern states and higher elevations often post their best PWI scores of the year before peak heat sets in. The Southeast sees rising humidity and more frequent afternoon thunderstorms, while the Southwest transitions toward hotter and drier conditions. For the most comfortable early-summer weather, the Pacific Northwest, Northern Rockies, and Upper Midwest tend to rank highest.

July

Best Weather in the U.S. in July →

July is peak summer across most of the country. Heat dominates the interior, the Southeast combines warmth with daily storm potential, and desert regions reach their highest temperatures of the year. Coastal areas, mountain elevations, and parts of the northern U.S. offer the most moderate conditions and the strongest PWI scores during this month. If you're planning summer travel and comfort is a priority, elevation and latitude matter most in July.

August

Best Weather in the U.S. in August →

August continues the summer pattern, though subtle shifts begin to appear in some northern areas by late in the month. Coastal and mountain regions remain the top performers. Humidity stays elevated across the eastern U.S., and afternoon storms are common in the South and parts of the Midwest. PWI scores reflect a country still largely in the grip of summer, with pockets of comfortable conditions at higher elevations and along the coasts.

September

Best Weather in the U.S. in September →

September is the start of one of the best weather stretches of the year. Temperatures moderate across much of the country, humidity begins to drop in many regions, and storm frequency declines. Higher elevations and northern states often record their strongest PWI scores of the year this month. September consistently ranks as an excellent time for travel across a wide range of destinations, from the Rockies to the Mid-Atlantic.

October

Best Weather in the U.S. in October →

October is one of the highest-ranked months for weather across the United States. Cooler temperatures, lower humidity, and persistent high-pressure systems create stable, comfortable conditions across large portions of the country. The Southwest, Southeast, and Mid-Atlantic consistently perform well. Northern states begin transitioning toward late-fall patterns, but even there, October delivers many days of strong weather before winter takes hold.

November

Best Weather in the U.S. in November →

November brings cooling temperatures nationwide, but the South and Southwest remain mild and stable well into the month. The desert Southwest and parts of Texas frequently post strong PWI scores through November. Northern states see increasing cold fronts and the earliest signs of winter, but southern destinations offer a reliable alternative for those seeking comfortable late-fall conditions.

December

Best Weather in the U.S. in December →

December settles winter across the northern half of the country, with snow and cold air becoming regular features of the Midwest and Northeast. Southern states and desert regions are the standout performers this month, with mild daytime temperatures and clearer skies producing some of the highest PWI scores relative to the rest of the country. For winter travel focused on weather comfort, the South and Southwest are the clear leaders.

Late spring (May) and early fall (September–October) tend to produce the most widespread favorable weather across the United States, with strong PWI scores in the greatest number of regions simultaneously. That said, every month has a regional winner — the best weather depends heavily on where you're going and what conditions you're looking for. The monthly rankings above provide a more precise answer than general climate averages alone.