donsutherland1

Will do.

Tomorrow and Sunday will remain mild with highs in the middle and upper 60s. Some spots could reach 70° or a little warmer. However, a cold front that will bring showers or a thundershower late Sunday or Sunday night will result in cooler conditions returning to the region on Monday. Temperatures through midweek will likely top out in the 50s. The ENSO Region 1+2 anomaly was +1.3°C and the Region 3.4 anomaly was +0.2°C for the week centered around March 25. For the past six weeks, the ENSO Region 1+2 anomaly has averaged +1.25°C and the ENSO Region 3.4 anomaly has averaged -0.02°C. Neutral ENSO conditions will continue through at least mid-spring. The SOI was -4.90 today. The preliminary Arctic Oscillation (AO) was +1.917 today.

Yes.

It will turn noticeably warmer tomorrow with highs in the upper 60s to perhaps 70°. Friday should feature highs near or just above 70°. Sunday will remain mild with highs in the middle and upper 60s. However, a cold front will result in cooler conditions returning to the region on Monday. Temperatures through midweek will likely top out in the 50s. The ENSO Region 1+2 anomaly was +1.3°C and the Region 3.4 anomaly was +0.2°C for the week centered around March 25. For the past six weeks, the ENSO Region 1+2 anomaly has averaged +1.25°C and the ENSO Region 3.4 anomaly has averaged -0.02°C. Neutral ENSO conditions will continue through at least mid-spring. The SOI was -8.37 today. The preliminary Arctic Oscillation (AO) was +1.999 today.

New York City finished March with a monthly mean temperature of 46.8°. That was 4.0° above normal and 4.3° above the earlier 1981-2020 baseline.

Phoenix was so warm during March 2026 that its mean monthly low, mean monthly high, and mean monthly temperatures would all have ranked second hottest on record for April. Numerous March temperature records surpassed the most extreme values experienced during April.

Powered by a monster heat dome that would be a rarity during the summer, Phoenix and the Southwest experienced mind-boggling warmth during March. Chart 1: Daily Temperatures: Chart 2: Return Time of Monthly Mean Temperature (Historic Period): The warmth has been persistent since December. December, February, and March set new records for warmest December, February, and March on record. As a result, Phoenix also experienced its warmest December-March period by a large margin.

Yes. That would be better. The instrument details mentioned by @chubbs could still play a role at some sites.

Bad methodology. Notice he uses MT and WY. 90s in March are virtually assured to be near or at zero. Thus he assures himself the kind of conclusion he seeks. A more robust approach would involve standardized measurements, e.g., the number of highs 1 sigma, 2 sigma, etc., above the 20th century baseline.

Tomorrow will be noticeably warmer. High temperatures will reach the lower and middle 60s in the New York City area. The warming trend will continue through the remainder of March with the temperature reaching the lower and middle 70s as March concludes on Monday. April will also start with readings topping out in the lower to middle 70s, but a cold front will knock down temperatures shortly afterward. A wet period could follow. The ENSO Region 1+2 anomaly was +1.6°C and the Region 3.4 anomaly was 0.0°C for the week centered around March 18. For the past six weeks, the ENSO Region 1+2 anomaly has averaged +1.15°C and the ENSO Region 3.4 anomaly has averaged -0.08°C. Neutral ENSO conditions will continue through at least mid-spring. The SOI was -8.86 today. The preliminary Arctic Oscillation (AO) was +3.443 today. Based on sensitivity analysis applied to the latest guidance, there is an implied near 100% probability that New York City will have a warmer than normal March (1991-2020 normal). March will likely finish with a mean temperature near 46.5° (3.7° above normal). Supplemental Information: The projected mean would be 4.0° above the 1981-2010 normal monthly value.

Using a chart inspired by Jeff Berardelli's return-time charts, here's how Fairbanks would look for March 2026: And December-March (cases prior to 1911-12 were excluded due to the number of missing days during the 1905-06 through 1910-11 period):

UHI, which is an important contributor, has been mentioned in several of the past Phoenix-related threads. Even setting aside, UHI, there has been a strong warming trend in Arizona and the Southwest. During 1970-2025, Arizona's minimum temperatures have warmed an average of 0.6°/decade. Phoenix's have increased by 0.8°/decade. In terms of maximum temperatures, Arizona's rate of warming has been 0.7°/decade while Phoenix's has been 0.8°/decade. The differences are a reasonable but not perfect proxy for the impact of UHI. The ongoing March heat is widespread. The following stations with 100-year or longer climate records are on course for their warmest March on record. Some will break their existing records by sizable margins.

The weekend started on a cold note. Low temperatures included: Boston: 27° Danbury: 28° Bridgeport: 31° Islip: 32° New York City: 31° Newark: 31° Philadelphia: 33° Poughkeepsie: 25° Sussex: 25° White Plains: 27° Tomorrow will become somewhat milder. The warming trend will continue through the remainder of March with the temperature reaching the lower and middle 70s as March concludes. April will also start with readings topping out in the lower to middle 70s, but a cold front will knock down temperatures shortly afterward. A wet period could follow. The ENSO Region 1+2 anomaly was +1.6°C and the Region 3.4 anomaly was 0.0°C for the week centered around March 18. For the past six weeks, the ENSO Region 1+2 anomaly has averaged +1.15°C and the ENSO Region 3.4 anomaly has averaged -0.08°C. Neutral ENSO conditions will continue through at least mid-spring. The SOI was -11.92 today. The preliminary Arctic Oscillation (AO) was +2.569 today. Based on sensitivity analysis applied to the latest guidance, there is an implied near 100% probability that New York City will have a warmer than normal March (1991-2020 normal). March will likely finish with a mean temperature near 46.4° (3.6° above normal). Supplemental Information: The projected mean would be 3.9° above the 1981-2010 normal monthly value.

Flagstaff has an altitude > 2,100 meters or about 7,000 feet ASL.

Many cities in the Southwest and even California will have experienced their warmest March on record, some by large margins.