September 2026

[lee59]

Parts of the Catskills already dipping into the upper 40s.

[MANDA]

9 minutes ago, lee59 said:

Parts of the Catskills already dipping into the upper 40s.

Yep and NWNJ cool spots are in the 50-53 degree range currently.

[donsutherland1]

The coolest air mass is continuing to push into the region. Highs tomorrow and Wednesday will reach the lower and middle 70s. New York City will see lows in the upper 50s to lower 60s. As a result, Central Park will experience its first reading below 60° this season tomorrow morning. the timing matches well with the last two El Niño events: 2015-2016: September 14 and 2023-2024: September 15.

Wednesday through Friday will see temperatures recover mainly to the upper 70s. However, additional cool air will likely arrive some time during the next weekend.
 
The ENSO Region 1+2 anomaly was +4.5°C and the Region 3.4 anomaly was +2.9°C for the week centered around September 9. For the past six weeks, the ENSO Region 1+2 anomaly has averaged +4.23°C and the ENSO Region 3.4 anomaly has averaged +2.65°C. The ongoing strong El Niño, will continue to strengthen through the mid-fall. 

The SOI was -25.91 today.

The preliminary Arctic Oscillation (AO) was +1.373 today. 

Based on sensitivity analysis applied to the latest guidance, there is an implied near 54% probability that New York City will have a warmer than normal September (1991-2020 normal). September will likely finish with a mean temperature near 69.4° (0.2° above normal). 

Supplemental Information: The projected mean would be 1.4° above the 1981-2010 normal monthly value. 

 

[donsutherland1]

The New York City area will see its first lows in the 50s this season tomorrow morning.

[SACRUS]

Today's Highs:
 

PHL: 78
New Brnswck: 77
BLM: 77
JFK: * 77
ACY: 77
EWR: 76
TEB: 75
LGA: 75
TTN: 75
NYC: 74
ISP: 73

[nycwinter]

after a brief moderate warmup this week we can safely say summer is not only over on the calendar but warm days in the 80's will be a distant memory.

[gravitylover]

46° Hoody weather!

[jm1220]

Down to 50 here. Maybe we make it into the 40s?

[ForestHillWx]

Lots of upper 40s out this way; DP down to 43. 

[bluewave]

11 hours ago, LibertyBell said:

I thought it was supposed to be in the 80s this week.

To be fair the weather in early to mid September is radically different from the weather in October and November, it's two different seasons Chris.

To be fair Chris it's still summer. We have still gotten low and even mid 90s temps in the first half of September.  As a matter of fact the first half of September is generally warmer than the first half of June. It just so happens that meteorologists are lazy and dont like to have their seasons begin on the 21st when the seasons really begin. I actually have a solution for this. January 1st doesn't mean anything and there's no reason why the new year should start on that day. I propose we move January 1 back to the current December 21 so the new year begins on the first day of winter and this makes it a much more meaningful day and on top of that the days start to get longer from that point on. This makes our seasons match neatly with the months. So now we would have 

Winter = JFM

Spring = AMJ

Summer = JAS

Fall = OND

 

Our area has  been seeing more and more 80° days in recent years during October and November. We set the all-time October highs in the mid 90s during October 2019. JFK and other stations set records last few years multiple times for latest 80° in the season. The area add more 80° days to the list at the usual warm spots next few days.

First/Last 80°Summary for JFK INTERNATIONAL AIRPORT, NY
Each section contains date and year of occurrence, value on that date.
Click column heading to sort ascending, click again to sort descending.

2022	05-21 (2022)	87	11-07 (2022)	80	169
2024	04-29 (2024)	82	11-01 (2024)	82	185
1950	05-07 (1950)	81	11-01 (1950)	80	177
1971	05-11 (1971)	80	10-29 (1971)	80	170
2023	04-12 (2023)	84	10-28 (2023)	81	198
1963	04-18 (1963)	82	10-21 (1963)	81	185
1949	05-05 (1949)	83	10-21 (1949)	80	168
1969	04-26 (1969)	80	10-20 (1969)	81	176
2016	05-25 (2016)	87	10-19 (2016)	86	146
1975	05-20 (1975)	81	10-15 (1975)	82	147
2021	03-26 (2021)	81	10-14 (2021)	80	201
1990	03-13 (1990)	85	10-14 (1990)	82	214
1962	04-22 (1962)	81	10-12 (1962)	81	172
1960	04-15 (1960)	80	10-11 (1960)	80	178
2017	04-16 (2017)	83	10-10 (2017)	84	176
2011	05-24 (2011)	82	10-10 (2011)	84	138
1997	05-19 (1997)	82	10-10 (1997)	86	143
2007	04-30 (2007)	81	10-09 (2007)	80	161
1961	05-25 (1961)	81	10-09 (1961)	82	136
1959	04-08 (1959)	82	10-09 (1959)	82	183
2018	05-02 (2018)	83	10-07 (2018)	80	157

 

 

[straphanger]

It looks like Central Park finally hit 57, marking the first time it has dropped into the 50s since mid-June.

Oddly enough, LGA was stuck around 61 this morning and didn't budge much.  Contrary to that, my own station reported a low of 57 this morning around 0620.  Definitely a chilly, refreshing feel this morning with the low DPs and light breeze.

[winterwarlock]

44 was my low this morning

[MJO812]

61 here

[SnoSki14]

Plenty of 80s to come. There's 3 coming this week alone. 

[bluewave]

Parts of Fairfield County are at 30” of rain since June 1st. This beat the previous record by 3.5” at BDR. Last year was the 3rd driest over the same period. Very impressive to pull this off without any tropical systems. Just goes to show how much more moisture the record warm atmosphere can hold.

https://www.theclimatebrink.com/p/the-atmosphere-just-set-a-water-vapor

The Atmosphere Just Set a Water Vapor Record

More water vapor means more rocket fuel for extreme rain — so this record is not good news

 

 

Data for June 1, 2026 through September 15, 2026
Click column heading to sort ascending, click again to sort descending.

BETHEL 0.5 E	CoCoRaHS	30.13
BETHEL 3.5 NNE	CoCoRaHS	30.11
TRUMBULL 2.6 SSE	CoCoRaHS	29.44
STRATFORD 0.2 ESE	CoCoRaHS	29.35
DANBURY	COOP	28.33
SHELTON 1.3 W	CoCoRaHS	28.16
FAIRFIELD 1.5 NE	CoCoRaHS	27.87
BROOKFIELD 3.3 SSE	CoCoRaHS	27.67
IGOR I SIKORSKY MEMORIAL AIRPORT	WBAN	27.23
NEWTOWN 5.3 S	CoCoRaHS	27.11
NEWTOWN 4.6 SE	CoCoRaHS	26.76
NORWALK 2.9 NNW	CoCoRaHS	25.90
STRATFORD 0.9 W	CoCoRaHS	25.90
SHELTON 1.3 W	CoCoRaHS	25.65
BETHEL 4.5 SSE	CoCoRaHS	25.13

 

Wettest Time Series Summary for IGOR I SIKORSKY MEMORIAL AIRPORT, CT 6-01 to 9-15
Click column heading to sort ascending, click again to sort descending.

1	2026-09-15	27.23	1
2	1971-09-15	23.73	0
3	2011-09-15	21.52	0
4	1992-09-15	21.34	0
5	2006-09-15	21.06	0
6	1972-09-15	20.97	0
7	1952-09-15	20.35	0
8	2021-09-15	18.83	0
9	1982-09-15	18.52	0
10	2000-09-15	18.40	0

 

Driest Time Series Summary for IGOR I SIKORSKY MEMORIAL AIRPORT, CT
Click column heading to sort ascending, click again to sort descending.

1	1964-09-15	4.36	0
2	1995-09-15	4.37	0
3	2025-09-15	5.25	0
4	1993-09-15	5.71	0
5	1948-09-15	6.37	30
6	1966-09-15	6.62	0
7	1957-09-15	6.98	0
8	1970-09-15	7.52	0
9	2005-09-15	7.57	0

[MJO812]

20 minutes ago, SnoSki14 said:

Plenty of 80s to come. There's 3 coming this week alone. 

Next week looks cool and wet

[bluewave]

Next week looks closer to average. But it will feel much cooler due to how warm this month has been so far. So something approaching more fall-like weather.

 

 

[MarcmmKU]

22 hours ago, bluewave said:

The cool down for late September continues to look less impressive following the record near 600dm ridge this week. 
 

EPS new forecast September 21st-28th

Old forecast September 21st-28th

 

The southern plains and southeast really can't take a break from the heat. It's like there's a permanent ridge over Oklahoma now.

[bluewave]

8 minutes ago, MarcmmKU said:

The southern plains and southeast really can't take a break from the heat. It's like there's a permanent ridge over Oklahoma now.

This record breaking 600 dm ridge is ridiculous for September.

 

[Brian5671]

48 here this AM!

[uofmiami]

50.9 in Muttontown & 52.5 in Syosset for lows this morning. 

[lee59]

53.2 here this morning

[JerseyWx]

1 hour ago, bluewave said:

Next week looks closer to average. But it will feel much cooler due to how warm this month has been so far. So something approaching more fall-like weather.

 

 

Monday through Thursday I don't have a forecast high above 70.