Patchogue, United States — Weather in September 2026

Monthly climate averages for Patchogue, United States. Based on 10-year ERA5 reanalysis data.

Cfa Humid Subtropical
8.7 /10
Excellent

September is an excellent month in Patchogue

Climate Overview

Patchogue, United States in September has warm conditions, with highs averaging 22.9°C (73°F). Sea temperature averages 21.3°C (70°F).

This month falls at the beginning of Autumn.

Daily highs in September gradually drop from around 24°C (76°F) at the start to 21°C (70°F) by month's end.

Rainfall is heaviest during the last third of the month, while the middle tends to be drier.

Expect around 10.1h of sunshine at the start of September, decreasing to 7.4h by the end.

The warmest days tend to fall around the 4th, averaging 24.7°C (76°F).

Compared to August, this month is about 3°C cooler with 1 fewer rainy days. Temperatures begin dropping heading into October.

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Monthly September Averages

Temperature
23°C / 19°C
Feels Like
24°C / 18°C
Rain
9 days · 106 mm
Sunshine
9.1h / day
Humidity
77% — Humid
Wind
22 km/h
Wind Direction
ENE (71°)
Gusts
37 km/h
Daylight
12.5 h
Cloud Cover
56%
Clear Sky Days
5.9
UV Index
5.1 — High
Sea Temperature
21°C
Dew Point
17°C — Humid
Moon Phase
Waxing Crescent · 11%

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

32°C 29°C 26°C 23°C 20°C 17°C 14°C 151015202530
HighLow

Daily Precipitation

0 mm 3 mm 6 mm 9 mm 12 mm 151015202530
Rainfall

Daily Sunshine

0h 3h 6h 9h 12h 151015202530
Sunshine

Daily Wind Speed

0 7 14 21 28 35 151015202530
Wind Speed
Sun Position
Sunrise 06:34
Daylight 12.5h
Sunset 19:04

What to Expect

Daytime temperatures around 23°C (73°F) are ideal for full-day outdoor exploration.

Rain usually comes in shorter passing showers rather than all-day rain.

Recent yearly records for September have stayed close to the long-run average.

Compare Months

January
Poor
Temp
5°C / 0°C
Feels Like
0°C / -6°C
Rain
10days (101 mm) Wet
Sun
6.1h Fair
Humidity
69% Muggy
UV
2.4 Moderate
Snow Days
5days
View Details
February
Poor
Temp
6°C / 0°C
Feels Like
2°C / -5°C
Rain
10days (103 mm) Wet
Sun
6.8h Fair
Humidity
71% Muggy
UV
3.4 Moderate
Snow Days
6days
View Details
March
Poor
Temp
9°C / 3°C
Feels Like
5°C / -3°C
Rain
11days (111 mm) Wet
Sun
8.4h Good
Humidity
69% Muggy
UV
4.6 Moderate
Snow Days
3days
View Details
April
Fair
Temp
13°C / 7°C
Feels Like
11°C / 3°C
Rain
11days (111 mm) Wet
Sun
9.2h Good
Humidity
72% Muggy
UV
5.4 High
View Details
May
Good
Temp
18°C / 12°C
Feels Like
17°C / 9°C
Rain
12days (108 mm) Wet
Sun
10h Excellent
Humidity
77% Humid
UV
6.3 High
View Details
June best
Excellent
Temp
23°C / 18°C
Feels Like
25°C / 17°C
Rain
9days (73 mm) Wet
Sun
11.6h Excellent
Humidity
77% Humid
UV
7.1 Very High
View Details
July best
Good
Temp
27°C / 22°C
Feels Like
30°C / 24°C
Rain
11days (102 mm) Wet
Sun
11.9h Excellent
Humidity
79% Humid
UV
7.3 Very High
View Details
August best
Excellent
Temp
26°C / 22°C
Feels Like
29°C / 23°C
Rain
10days (88 mm) Wet
Sun
11h Excellent
Humidity
77% Humid
UV
6.6 High
View Details
September best
Excellent
Temp
23°C / 19°C
Feels Like
24°C / 18°C
Rain
9days (106 mm) Wet
Sun
9.1h Good
Humidity
77% Humid
UV
5.1 High
View Details
October best
Good
Temp
18°C / 13°C
Feels Like
17°C / 11°C
Rain
10days (123 mm) Wet
Sun
7.7h Good
Humidity
75% Muggy
UV
4 Moderate
View Details
November
Fair
Temp
12°C / 7°C
Feels Like
9°C / 2°C
Rain
8days (89 mm) Wet
Sun
7h Good
Humidity
69% Muggy
UV
2.9 Moderate
Snow Days
1days
View Details
December
Poor
Temp
7°C / 2°C
Feels Like
3°C / -3°C
Rain
11days (132 mm) Wet
Sun
5.7h Fair
Humidity
71% Muggy
UV
2.1 Moderate
Snow Days
3days
View Details
Month Temp Feels Like Rain Sun Humidity UV Status
January 5°C / 0°C 0°C / -6°C 10days (101 mm) Wet 6.1h Fair 69% Muggy 2.4 Moderate Poor View Details
February 6°C / 0°C 2°C / -5°C 10days (103 mm) Wet 6.8h Fair 71% Muggy 3.4 Moderate Poor View Details
March 9°C / 3°C 5°C / -3°C 11days (111 mm) Wet 8.4h Good 69% Muggy 4.6 Moderate Poor View Details
April 13°C / 7°C 11°C / 3°C 11days (111 mm) Wet 9.2h Good 72% Muggy 5.4 High Fair View Details
May 18°C / 12°C 17°C / 9°C 12days (108 mm) Wet 10h Excellent 77% Humid 6.3 High Good View Details
June best 23°C / 18°C 25°C / 17°C 9days (73 mm) Wet 11.6h Excellent 77% Humid 7.1 Very High Excellent View Details
July best 27°C / 22°C 30°C / 24°C 11days (102 mm) Wet 11.9h Excellent 79% Humid 7.3 Very High Good View Details
August best 26°C / 22°C 29°C / 23°C 10days (88 mm) Wet 11h Excellent 77% Humid 6.6 High Excellent View Details
September best 23°C / 19°C 24°C / 18°C 9days (106 mm) Wet 9.1h Good 77% Humid 5.1 High Excellent View Details
October best 18°C / 13°C 17°C / 11°C 10days (123 mm) Wet 7.7h Good 75% Muggy 4 Moderate Good View Details
November 12°C / 7°C 9°C / 2°C 8days (89 mm) Wet 7h Good 69% Muggy 2.9 Moderate Fair View Details
December 7°C / 2°C 3°C / -3°C 11days (132 mm) Wet 5.7h Fair 71% Muggy 2.1 Moderate Poor View Details

What to Wear

Dress in layers — a mix of long sleeves, light sweaters, and a versatile jacket works best for changeable conditions.

A waterproof jacket or compact umbrella is recommended for occasional showers.

Packing List

UmbrellaSunscreen (SPF 30+)SunglassesComfortable walking shoes

Frequently Asked Questions

September is typically excellent for visiting Patchogue, with average highs of 23°C (73°F) and around 9 rainy days. Patchogue, United States in September has warm conditions, with highs averaging 22.9°C (73°F). Sea temperature averages
Patchogue typically sees around 9 rainy days in September with 106 mm (4.2 in) of total rainfall. An umbrella should suffice.
Nights stay pleasantly warm in Patchogue during September, around 19°C (65°F). Light evening wear is sufficient.
With highs of 23°C (73°F) and lows of 19°C (65°F) in September, we recommend: Umbrella, Sunscreen (SPF 30+), Sunglasses, Comfortable walking shoes. Comfortable walking shoes are essential.
Yes, September offers some of the best weather conditions in Patchogue with comfortable temperatures and lower chances of rain.
The average UV index in Patchogue during September is 5 (moderate). Sunscreen and sunglasses are recommended during midday hours.
Patchogue gets approximately 13 hours of daylight per day in September, with around 9 hours of sunshine.
Snow is uncommon in Patchogue during September based on 10-year climate averages.

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