US Southwest Climate – April 2026 Update
Climate Map – USA
Source: NOAA Climate at a Glance — US states & climate regions (tavg, pcp). Anomalies are vs the 1961–1990 baseline (temperature) or 1991–2020 (rainfall). See methodology.
Temperature – Average
US Southwest – Monthly Temperature – All Years
Each line represents one year of monthly temperature.
NOAA Climate at a Glance — regional tavg / pcp (monthly absolutes).
Shifting Seasons
Warm / cold seasonsHow spring and autumn have shifted in US Southwest. Spring is defined as the date monthly temperatures first rise above the long-term annual mean (10.8°C, from 1950–1979); autumn is the date they fall back below it. Temperature swings 23.3°C peak-to-peak across the year - a classic four-seasons rhythm.
Baseline vs recent monthly temperature climatology. Biggest warming: Dec (+2.0°C).
NOAA Climate at a Glance — regional tavg.
Rainfall & Rain Days – Totals
Member States (4)
Hottest & Coolest in US Southwest this Month
1-month anomaly vs 1961–1990 across the 4 members we cover. Click a name to open its profile.
Warmest
- 1.🇺🇸Arizona+7.80°C
- 2.🇺🇸Utah+7.72°C
- 3.🇺🇸Colorado+7.21°C
- 4.🇺🇸New Mexico+6.79°C
Coolest
- 1.🇺🇸New Mexico+6.79°C
- 2.🇺🇸Colorado+7.21°C
- 3.🇺🇸Utah+7.72°C
- 4.🇺🇸Arizona+7.80°C
Data Sources
- NOAA Climate at a Glance — Regional time series · NOAA code 107 · Open at NOAA
- Two-baseline model — comparison baseline 1961–1990; native baseline 1901–2000. Methodology →