Riverhead, United States — Weather in August 2026

Climate Overview

Riverhead, United States in August has warm conditions, with highs averaging 26.3°C (79°F). Rain falls on about 10 days this month. Sea temperature averages 22.7°C (73°F).

This month falls at the end of Summer.

Temperatures remain fairly steady throughout August, with daily highs around 26°C (79°F).

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

Expect around 11.5h of sunshine at the start of August, decreasing to 10.9h by the end.

The warmest days tend to fall around the 11th, averaging 27.2°C (81°F).

Temperatures begin dropping heading into September.

Monthly August Averages

Temperature

26°C / 22°C

Feels Like

29°C / 23°C

Rain

10 days · 83 mm

Sunshine

10.9h / day

Humidity

77% — Humid

Wind

20 km/h

Wind Direction

SW (220°)

Gusts

35 km/h

Daylight

13.8 h

Cloud Cover

53%

Clear Sky Days

5.5

UV Index

6.6 — High

Sea Temperature

23°C

Dew Point

20°C — Humid

Moon Phase

Waxing Crescent · 3%

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

HighLow

Daily Precipitation

Rainfall

Daily Sunshine

Sunshine

Daily Wind Speed

Wind Speed

Sun Position

Sunrise 06:02

Daylight 13.8h

Sunset 19:51

What to Expect

Daytime temperatures around 26°C (79°F) are ideal for full-day outdoor exploration.

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

1 of the last 5 yearly records were warmer than this month's long-run average.

Compare Months

Month	Temp	Feels Like	Rain	Sun	Humidity	UV	Status	Details
January	5°C / 0°C	0°C / -6°C	10days (99 mm) Wet	6.1h Fair	69% Muggy	2.3 Moderate	Poor	View Details
February	6°C / 0°C	2°C / -6°C	10days (96 mm) Wet	6.8h Fair	71% Muggy	3.4 Moderate	Poor	View Details
March	9°C / 2°C	5°C / -3°C	10days (106 mm) Wet	8.4h Good	69% Muggy	4.6 Moderate	Poor	View Details
April	13°C / 7°C	11°C / 3°C	12days (106 mm) Wet	9.1h Good	72% Muggy	5.5 High	Fair	View Details
May	18°C / 12°C	18°C / 9°C	11days (101 mm) Wet	9.9h Good	77% Humid	6.4 High	Good	View Details
June best	24°C / 18°C	25°C / 17°C	8days (66 mm) Wet	11.4h Excellent	77% Humid	7.2 Very High	Excellent	View Details
July best	27°C / 22°C	31°C / 24°C	9days (95 mm) Wet	11.8h Excellent	78% Humid	7.4 Very High	Excellent	View Details
August best	26°C / 22°C	29°C / 23°C	10days (83 mm) Wet	10.9h Excellent	77% Humid	6.6 High	Excellent	View Details
September best	23°C / 18°C	24°C / 18°C	9days (97 mm) Wet	8.9h Good	76% Humid	5.2 High	Excellent	View Details
October	18°C / 13°C	17°C / 11°C	10days (121 mm) Wet	7.6h Good	75% Muggy	4.1 Moderate	Good	View Details
November	12°C / 7°C	9°C / 2°C	8days (85 mm) Wet	6.9h Fair	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

Summer clothing like shorts, t-shirts, and sundresses will be comfortable. Bring a light cardigan for air-conditioned spaces.

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

Packing List

UmbrellaWaterproof jacketBreathable clothingSunscreen (SPF 30+)Sun hatSunglassesComfortable walking shoes

Frequently Asked Questions

Expand all

Is August a good time to visit Riverhead?

August is typically excellent for visiting Riverhead, with average highs of 26°C (79°F) and around 10 rainy days. Riverhead, United States in August has warm conditions, with highs averaging 26.3°C (79°F). Rain falls on about 10 days

Does it rain a lot in Riverhead in August?

Riverhead typically sees around 10 rainy days in August with 83 mm (3.3 in) of total rainfall. An umbrella should suffice.

Does it get cold at night in Riverhead in August?

Nights stay pleasantly warm in Riverhead during August, around 22°C (71°F). Light evening wear is sufficient.

What should I pack for Riverhead in August?

With highs of 26°C (79°F) and lows of 22°C (71°F) in August, we recommend: Umbrella, Waterproof jacket, Breathable clothing, Sunscreen (SPF 30+), Sun hat. Comfortable walking shoes are essential.

Is August among the best months weather-wise in Riverhead?

Yes, August offers some of the best weather conditions in Riverhead with comfortable temperatures and lower chances of rain.

What is the UV index in Riverhead in August?

The average UV index in Riverhead during August is 7 (high). Wear sunscreen SPF 30+, a hat, and sunglasses. Limit direct sun exposure between 10 AM and 4 PM.

How many hours of daylight are there in Riverhead in August?

Riverhead gets approximately 14 hours of daylight per day in August, with around 11 hours of sunshine.

Does it snow in Riverhead in August?

Snow is uncommon in Riverhead during August based on 10-year climate averages.

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