US humidity through the year
Humidity is a moving target. Press play to watch average relative humidity sweep across all 50 states month by month — the desert Southwest drying out each spring, the Gulf staying muggy, the monsoon bump in July.
Evidence-checked. Facts and figures on this page are verified against published standards and government sources (ERA5 reanalysis via Open-Meteo, monthly means 2022–2023). Last verified July 2026 — our methodology.
- Under 45% · dry
- 45–60%
- 60–68%
- 68–72%
- 72%+ · very humid
January across America
Tap or hover any state to see its month-by-month humidity. Press play to watch the seasons move.
Why humidity swings so much by season and place
The Southwest is bone-dry most of the year but spikes during the late-summer monsoon; the Gulf and Southeast stay humid year-round; northern states climb in summer and fall back in winter. Those swings are exactly why theright dehumidifier — and the season — matter so much. See today's live picture on theUS humidity map, check your own area on the 7-day forecast, or find your climate in the most humid states.