Fallbrook, United States — Weather in August 2026

Climate Overview

Fallbrook, United States in August has hot conditions, with highs reaching 30.6°C (87°F) and afternoons the warmest part of the day. Rain is rare, falling on about 1 days this month. Temperatures drop noticeably between day and night. Sea temperature averages 22.6°C (73°F).

This month falls at the end of Summer. Temperatures are at their seasonal peak.

Temperatures remain fairly steady throughout August, with daily highs around 31°C (88°F).

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

Expect around 12.6h of sunshine at the start of August, decreasing to 11.8h by the end.

The warmest days tend to fall around the 31th, averaging 31.8°C (89°F).

Monthly August Averages

Temperature

31°C / 20°C

Feels Like

33°C / 23°C

Rain

1 days · 7 mm

Sunshine

12.2h / day

Humidity

66% — Muggy

Wind

13 km/h

Wind Direction

SW (236°)

Gusts

32 km/h

Daylight

13.4 h

Cloud Cover

25%

Clear Sky Days

UV Index

8 — Very High

Sea Temperature

23°C

Dew Point

19°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 06:13

Daylight 13.4h

Sunset 19:37

Compare Months

3days (13 mm) Excellent

1days (2 mm) Excellent

1days (2 mm) Excellent

1days (7 mm) Excellent

2days (9 mm) Excellent

3days (11 mm) Excellent

3days (36 mm) Excellent

Month	Temp	Feels Like	Rain	Sun	Humidity	UV	Status	Details
January	18°C / 7°C	16°C / 5°C	6days (76 mm) Good	8.3h Good	72% Muggy	3.8 Moderate	Good	View Details
February	19°C / 8°C	17°C / 6°C	7days (68 mm) Good	9.1h Good	69% Muggy	4.5 Moderate	Good	View Details
March	19°C / 9°C	18°C / 8°C	9days (72 mm) Wet	10.1h Excellent	75% Muggy	6 High	Good	View Details
April	22°C / 12°C	22°C / 11°C	4days (23 mm) Good	11.5h Excellent	70% Muggy	7.4 Very High	Excellent	View Details
May	22°C / 13°C	23°C / 13°C	3days (13 mm) Excellent	12.3h Excellent	73% Muggy	7.8 Very High	Excellent	View Details
June best	27°C / 16°C	28°C / 17°C	1days (2 mm) Excellent	13.3h Excellent	68% Muggy	8.4 Very High	Excellent	View Details
July	30°C / 19°C	32°C / 21°C	1days (2 mm) Excellent	13.1h Excellent	66% Muggy	8.4 Very High	Excellent	View Details
August	31°C / 20°C	33°C / 23°C	1days (7 mm) Excellent	12.2h Excellent	66% Muggy	8 Very High	Excellent	View Details
September best	29°C / 19°C	30°C / 21°C	2days (9 mm) Excellent	11.2h Excellent	67% Muggy	7 High	Excellent	View Details
October best	27°C / 15°C	26°C / 15°C	3days (11 mm) Excellent	10.2h Excellent	64% Muggy	5.7 High	Excellent	View Details
November	23°C / 11°C	21°C / 10°C	3days (36 mm) Excellent	9h Good	63% Muggy	4.3 Moderate	Excellent	View Details
December	19°C / 8°C	17°C / 7°C	5days (55 mm) Good	7.9h Good	69% Muggy	3.5 Moderate	Good	View Details

What to Wear

Light, breathable fabrics like cotton and linen are essential. Opt for loose-fitting clothing in light colors to stay cool.

Temperatures drop significantly at night, so pack layers you can add or remove throughout the day.

Packing List

Breathable clothingSunscreen (SPF 30+)Sun hatSunglassesSandals

Frequently Asked Questions

Expand all

Is August a good time to visit Fallbrook?

August is typically excellent for visiting Fallbrook, with average highs of 31°C (87°F) and around 1 rainy days. Fallbrook, United States in August has hot conditions, with highs reaching 30.6°C (87°F) and afternoons the warmest part

Does it rain a lot in Fallbrook in August?

Fallbrook typically sees around 1 rainy days in August with 7 mm (0.3 in) of total rainfall. An umbrella should suffice.

Does it get cold at night in Fallbrook in August?

Nights stay pleasantly warm in Fallbrook during August, around 20°C (69°F). Light evening wear is sufficient.

What should I pack for Fallbrook in August?

With highs of 31°C (87°F) and lows of 20°C (69°F) in August, we recommend: Breathable clothing, Sunscreen (SPF 30+), Sun hat, Sunglasses, Sandals. Comfortable walking shoes are essential.

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

August is not the most favourable month weather-wise in Fallbrook. Consider visiting during months with milder temperatures or less rainfall for a better experience.

What is the UV index in Fallbrook in August?

The average UV index in Fallbrook during August is 8 (very high). Strong sun protection is essential — SPF 50+, protective clothing, and avoid prolonged outdoor exposure during peak hours.

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

Fallbrook gets approximately 13 hours of daylight per day in August, with around 12 hours of sunshine.

Does it snow in Fallbrook in August?

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

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