Report•December 2, 2025
Monthly Attribution Overview – November 2025
An analysis of how climate change boosted United States temperatures in November 2025
Using Climate Central’s Climate Shift Index (CSI) tool to measure the impact of climate change on daily temperatures across the United States, as well as NOAA’s Applied Climate Information System (ACIS) to find daily temperature information, we have compiled a high-level overview of how climate change has affected temperature trends in November in cities across the United States. (Dataset downloadable as Excel workbook here.)
1. High-Level Findings
The U.S. saw elevated temperatures in November, with an average anomaly — or difference from normal — of 2.0°F across 194 cities.
Thirty-one cities experienced one of their top five warmest November temperatures on record. On average, stations have data reaching back to 1893.
Elevated Climate Shift Index values were observed across the Southwest and Texas.
Long-term November warming trends show that nearly all cities analyzed have warmed since 1970, consistent with findings from Climate Central’s 2025 Winter Package.
Figure 1. Threaded ACIS temperature anomalies (differences from normal) for November 2025 relative to the 1991-2020 normal. Analysis based on ACIS data.
Figure 2. Days with a CSI of 2 or higher for November 2025 for ACIS threaded stations. Analysis based on ERA5 data (11/1 - 11/25) and GFS data (11/26 - 11/30).
2. Local Temperature Anomaly Analysis
The average temperature anomaly — or difference from normal — across the 194 cities analyzed was 2.1°F. The majority (139 cities) recorded hotter-than-average temperatures.
Temperatures were especially elevated across the western half of the U.S., where every city experienced above-average temperatures. The most unusually hot regions were the Southwest, the South, and the Northern Rockies and Plains — where average temperature anomalies exceeded 4.8°F.
The Northeast was the only region that was cooler than normal, with temperatures 1.0°F below normal.
The most unusually warm city in November was Waco, Texas, which was 7.5°F warmer than usual.
Of the 194 ACIS stations analyzed, 183 showed warming trends for November, indicating that these cities have been warming on average since 1970.
El Paso, Texas, saw the greatest warming since 1970 — the average November there is now 6.9°F warmer than it was in 1970.
Table 1. Top 10 ACIS stations with the highest November 2025 temperature anomaly.
City | State | Temperature anomaly or difference from normal (°F) | Average temperature (°F) | Warming since 1970 (°F) |
|---|---|---|---|---|
Waco | TX | 7.5 | 64.8 | 1.6 |
Shreveport | LA | 7.4 | 64.1 | 3.1 |
Rapid City | SD | 7.3 | 42.1 | 3.2 |
Missoula | MT | 7.1 | 39.5 | 1.9 |
Lubbock | TX | 7.1 | 57.2 | 4.0 |
San Antonio | TX | 7.1 | 68.0 | 3.5 |
Albuquerque | NM | 7.1 | 52.8 | 4.5 |
Grand Junction | CO | 7.0 | 46.7 | 2.1 |
Salt Lake City | UT | 7.0 | 48.9 | 2.3 |
Wichita Falls | TX | 6.9 | 59.8 | 3.6 |
Table 2. Top ACIS stations with the fastest warming November since 1970.
City | State | Warming since 1970 (°F) | Temperature anomaly or difference from normal (°F) | Average temperature (°F) |
|---|---|---|---|---|
El Paso | TX | 6.9 | 5.8 | 60.3 |
Las Vegas | NV | 6.4 | 4.5 | 61.7 |
Phoenix | AZ | 6.1 | 3.9 | 69.2 |
Tucson | AZ | 6.1 | 3.1 | 64.8 |
Fargo | ND | 5.8 | 3.6 | 33.0 |
North Platte | NE | 5.8 | 4.5 | 41.7 |
Colorado Springs | CO | 5.8 | 6.4 | 45.9 |
Amarillo | TX | 5.5 | 4.1 | 51.5 |
Reno | NV | 5.2 | 4.8 | 48.8 |
Sioux Falls | SD | 5.2 | 2.4 | 37.3 |
Minneapolis | MN | 5.2 | 4.2 | 39.2 |
3. Local Climate Shift Index Analysis
San Juan, Puerto Rico had 27 days at CSI 5 in November, indicating that temperatures on those days were made at least five times more likely because of climate change.
Fifteen cities across the country experienced at least one week’s worth of days at or above a CSI 2.
On average, cities in the Southwest experienced the highest number of days (9) with a CSI of 2 or above.
Table 3. Top 10 ACIS stations with the highest number of days at or above a CSI 2 during November 2025.
City | State | Days at CSI 2 or higher | Days at CSI 5 | Average temperature (°F) | Temperature anomaly or difference from normal (°F) |
|---|---|---|---|---|---|
San Juan | PR | 30 | 27 | 81.2 | 0.7 |
Honolulu | HI | 20 | 6 | 78.5 | 0.6 |
El Paso | TX | 12 | 2 | 60.3 | 5.8 |
Tucson | AZ | 12 | 0 | 64.8 | 3.1 |
Flagstaff | AZ | 10 | 1 | 42.4 | 4.9 |
Denver | CO | 9 | 2 | 45.1 | 5.6 |
Missoula | MT | 9 | 2 | 39.5 | 7.1 |
Colorado Springs | CO | 9 | 3 | 45.9 | 6.4 |
Albuquerque | NM | 8 | 0 | 52.8 | 7.1 |
Phoenix | AZ | 8 | 0 | 69.2 | 3.9 |
Las Vegas | NV | 8 | 0 | 61.7 | 4.5 |
METHODOLOGY
Calculating the Climate Shift Index
All Climate Shift Index (CSI) levels reported in this brief are based on daily average temperatures and ERA5 data. See the frequently asked questions for details on computing the Climate Shift Index, including a summary of the multi-model approach described in Gilford et al. (2022).
City Analysis
We analyzed 194 Applied Climate Information System (ACIS) stations associated with U.S. cities. For each city, we found the CSI time series from the nearest 0.25° grid cell. We calculated the number of days at CSI levels 2, 3, 4, and 5. We used ACIS data to find the average monthly temperatures, temperature anomalies (compared to 1991-2020 normals), and precipitation information, and to derive average monthly warming trends for each city.
Regions
Regions are defined by the National Centers for Environmental Information climate regions.