The contiguous United States experienced an unprecedented atmospheric shift in March 2026, marking the warmest March in the 132-year record. According to data from the National Centers for Environmental Information (NCEI), the average temperature for the lower 48 states soared to 50.85°F, which is 9.35°F above the 20th-century average. This represents the first time any single month’s average has exceeded the 9°F threshold above that baseline.
This surge in temperature is not an isolated event but part of a broader, intensifying trend. The 12-month window from April 2025 through March 2026 now stands as the warmest annual span ever recorded for the contiguous U.S. Since records began in 1895. The scale of the heat was felt across the map, with 1,432 counties—representing more than half of the U.S. Land area and roughly one-third of the population—logging their single warmest March day on record since 1950.
Although the heat dominated the headlines, a severe lack of moisture created a compounding crisis. The first three months of 2026 were the driest January-to-March period on record for the contiguous U.S., with precipitation falling to less than 70% of the average. This breaks a long-standing record set in 1910, signaling a precarious start to the year for water management and agriculture.
A Continental Shift in Temperature
The warmth of March 2026 was particularly acute during the day. Maximum daytime temperatures averaged 11.4°F above the typical March average, and in some regions, they actually surpassed long-term April averages by 0.9°F. The geographic footprint of this heat was vast, stretching from the Pacific Coast through the Great Basin, the Southwest, and into the southern Plains.
Ten states recorded their warmest March on record: Arizona, California, Colorado, Idaho, Nevada, New Mexico, Oklahoma, Texas, Utah, and Wyoming. In these states, the average temperature for March was higher than the typical average for April. California’s experience was even more extreme, as its March average eclipsed its typical May average by 0.7°F.
The heat was not limited to the mainland. Hawai‘i saw its fifth-warmest March in 36 years, with a statewide average of 65.0°F. While daytime highs remained near average, the islands experienced record-breaking nighttime warmth; the average minimum temperature was 59.2°F, the highest March nighttime temperature recorded since 1991.
Alaska, however, presented a stark contrast. The state recorded its fourth-coldest March since 1925, with an average temperature of 0.6°F—over 10°F below the 1925–2000 average. While the North Slope stayed near average, the southeast interior and southern coast saw record-cold conditions, resulting in the coldest March minimum temperatures since 1972.
The Compounding Impact of Drought and Dryness
The U.S. Temperature and precipitation analysis in March 2026 reveals a dangerous synergy between extreme heat and record-low rainfall. The contiguous U.S. Average precipitation for the month was 1.83 inches, which is 0.68 inch below the 20th-century average, ranking as the eighth-driest March in 132 years.
This dryness was most severe in the West and Southwest. California, in particular, faced a dual-extreme event: it recorded both its warmest and driest March on record. The state received less than a quarter-inch of precipitation—less than 10% of its 20th-century March average.
This lack of moisture has had an immediate effect on the national drought footprint. By March 31, the U.S. Drought Monitor reported that approximately 59.9% of the contiguous U.S. Was in drought. This is an increase of 5% from the start of the month and represents the largest extent of drought since November 2022.
| State | Precipitation Status | Historical Context |
|---|---|---|
| California | Extreme Low | Lowest March total in 132-year record |
| Colorado | Remarkably Low | Tied for 2nd-driest March on record |
| New Mexico | Very Low | Tied for 2nd-driest March on record |
| Michigan | Very High | 3rd-highest March total on record |
While the mainland struggled with dryness, Hawai‘i experienced the opposite. Back-to-back Kona low systems mid-month triggered widespread major flooding and landslides, leading many areas—including O‘ahu, Maui, and the Sizeable Island—to record their wettest March since 1991.
Future Risks and Outlook
The combination of record heat and record dryness has created a volatile environment for the coming months. Twelve states experienced simultaneously hot and dry conditions in March, which experts suggest could severely impact snowpack and water resources. This volatility is expected to translate into a heightened risk of wildfires.
The National Interagency Fire Center indicates that wildland fire potential is above normal for much of the Deep South, Southeast, southern Plains, and Southwest. For those in these regions, the lack of spring moisture combined with escalating temperatures creates a prime environment for rapid fire spread.
Looking toward April, the Climate Prediction Center forecasts that above-average temperatures will likely persist across much of the contiguous U.S., particularly in the Southeast and the Great Basin. While some relief in the form of above-average precipitation is favored for the Mississippi Valley and Northeast, the West and central Rockies are expected to remain drier than average, likely expanding the existing drought footprint.
The full, comprehensive U.S. Climate Report for March 2026 is scheduled for official release on April 13, 2026, which will provide a deeper analysis of these anomalies and their long-term implications.
We invite readers to share their local observations of this season’s weather patterns in the comments below.
