Agat Weather in August (1981–2025)

📍 13.36°N, 144.66°E •
📊

August at a Glance in Agat

(1981–2025)
Avg High
🔥
28.6°C
Avg Low
❄️
27.8°C
Avg Temp
🌡️
28.2°C
Avg Rain
🌧️
277 mm
Avg Humidity
💧
82%
Avg Wind
🌬️
4.2 m/s
Avg Solar
☀️
5.2
kWh/m²/day
vs Annual
📈
+0.2°C
temp difference
🌡️Warm afternoons🌙Warm mornings☀️Very sunny🌧️Wet month💨Breezy💦Humid air

Agat August Weather Overview

August is close to Agat's year-round average, with average highs near 28.6°C and lows around 27.8°C (mean 28.2°C). It is a relatively wet time of year, averaging 277 mm of rainfall and 82% relative humidity across the period.

Agat August Temperature History (1981–2025)

Range

August is close to Agat's year-round average. Across 45 years of records, the warmest August in Agat was 2024 — when the month averaged 29.1°C — while the coldest was 1984 at 27.2°C. Typical August days reach 28.6°C with nights near 27.8°C. The long-term trend is warming, about 0.2°C per decade.

1981–1985 vs 2021–2025

Avg Temp27.6°C→28.6°C+1°C
Max Temp28.0°C→29.1°C+1.1°C
Min Temp27.2°C→28.2°C+1°C

Trend (per decade)

Avg Temp+0.2°C/decade ↗
Max Temp+0.2°C/decade ↗
Min Temp+0.2°C/decade ↗

Distribution of Avg Temp

27.0°C–27.8°C6 yr (13%)
27.8°C–28.5°C26 yr (58%)
28.5°C–29.3°C13 yr (29%)
29.3°C–30.0°C0 yr (0%)

Agat August Rainfall History (1981–2025)

Range

August is a relatively wet time of year in Agat, averaging 277 mm of rainfall. The wettest August on record was 2004 with 581 mm, while the driest was 1988 at 62 mm.

Agat August Humidity History (1981–2025)

Range

Relative humidity in Agat during August averages 82%. The most humid August was 2004 at 85%, and the least humid was 2013 at 78%.

Agat August Solar History (1981–2025)

Range

August receives about 5.2 kWh/m²/day of solar energy in Agat. The sunniest Augusts were 1994 and 1998 at 6 kWh/m²/day, and the cloudiest was 2004 at 4.

Agat August Wind History (1981–2025)

Range

Average wind speed in Agat during August is 4.2 m/s. The windiest August was 1986 at 6.6 m/s, while the calmest was 2017 at 2.6 m/s.

What August Feels Like in Agat

🌅
Warm
Morning
🌞
Warm
Afternoon
🌆
Warm
Evening
Rain chanceHigh
Outdoor comfort★★★☆☆

How August Ranks in Agat

🥶6th coolest month of the year
🌧️1st wettest month of the year
☀️7th sunniest month of the year

Ranked against the other 11 months using 1981–2025 averages.

Explore Agat Weather by Month

Agat August Averages by Decade

Metric1980s1990s2000s2010s2020sChange
Avg Temp27.8°C28.1°C28.2°C28.5°C28.7°C+0.9°C
Avg High28.2°C28.5°C28.6°C28.9°C29.1°C+0.9°C
Avg Low27.4°C27.7°C27.9°C28.1°C28.2°C+0.8°C
Avg Rain275 mm222 mm327 mm328 mm205 mm-70 mm

Extreme August Records in Agat

🔥Warmest August30.7°C2024
🧊Coldest August25.5°C1984
🌧️Wettest August581 mm2004
🏜️Driest August62 mm1988
🌬️Windiest August6.6 m/s1986

Key Insights for August

✅

August temperatures in Agat have risen by about 1°C between 1981–1985 and 2021–2025.

✅

August has ranged from a record low of 25.5°C (1984) to a record high of 30.7°C (2024).

✅

Rainfall in August is a relatively wet time of year, averaging 277 mm, with a wettest year of 581 mm.

Is August a Good Time to Visit Agat?

A quieter season to visit Agat

If your dates are flexible, the more temperate months of March and February tend to be the most comfortable for visiting Agat. That said, August — with days averaging 28.6°C and nights around 27.8°C (mean 28.2°C) and higher rainfall (277 mm) — can still be rewarding for travellers who don't mind the warmth, and often means fewer crowds.

See Agat's complete weather history All 12 months side by side, 1981–2025 records, annual trends and long-term averages in one place. View full history →

Agat Weather in August — In Depth

☀️ August climate overview

August is close to Agat's year-round average, with average highs near 28.6°C and lows around 27.8°C (mean 28.2°C). It is a relatively wet time of year, averaging 277 mm of rainfall and 82% relative humidity across the period.

🌧️ Rain, humidity & wind in August

August averages 277 mm of rainfall in Agat, a relatively wet time of year compared with the rest of the year. The wettest August on record saw 581 mm (2004), and the driest just 62 mm (1988). Humidity sits around 82% and average wind speed is 4.2 m/s, with solar radiation averaging 5.2 kWh/m²/day.

📈 How August has changed

Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 1°C. Daytime highs moved from 28°C to 29.1°C and overnight lows from 27.2°C to 28.2°C over the same span.
August Weather in Agat, Year by Year
🔥 warmest❄️ coldest🌧️ wettest
YearAvg HighAvg TempAvg LowHottest DayColdest DayRainfallHumidityWindSolar
202529.0°C28.6°C28.2°C30.0°C27.3°C206 mm81%3.1 m/s5.5
2024 🔥29.6°C29.1°C28.7°C30.7°C28.1°C201 mm80%3 m/s5.4
202329.1°C28.7°C28.4°C29.7°C27.5°C233 mm83%3.9 m/s5.2
202228.8°C28.3°C27.8°C29.6°C27.0°C177 mm80%2.9 m/s5.2
202128.8°C28.4°C28.0°C29.4°C27.2°C281 mm82%3.6 m/s5
202029.2°C28.8°C28.4°C29.8°C26.9°C133 mm80%3.2 m/s5.7
201929.0°C28.6°C28.2°C30.0°C26.6°C357 mm83%4.4 m/s4.9
201828.5°C28.1°C27.7°C29.2°C26.8°C351 mm84%4.7 m/s4.8
201729.3°C29.0°C28.6°C30.2°C27.1°C220 mm79%2.6 m/s5.6
201629.3°C28.9°C28.5°C30.1°C27.2°C360 mm82%5.2 m/s5
201528.9°C28.5°C28.0°C29.5°C26.8°C281 mm82%4.2 m/s5.4
201428.9°C28.5°C28.1°C29.6°C26.5°C201 mm81%2.8 m/s5.4
201329.3°C28.9°C28.4°C30.0°C27.5°C266 mm78%3.1 m/s5.7
201228.5°C28.0°C27.6°C29.4°C26.6°C521 mm82%3.8 m/s4.6
201128.8°C28.4°C28.0°C29.4°C26.0°C428 mm82%4.1 m/s5
201028.9°C28.4°C28.0°C29.7°C26.7°C294 mm81%4 m/s5.6
200928.9°C28.5°C28.1°C29.7°C27.0°C403 mm83%4.3 m/s4.9
200828.5°C28.1°C27.8°C29.6°C26.6°C185 mm81%2.9 m/s5.4
200728.4°C28.1°C27.7°C29.8°C26.6°C329 mm83%3.8 m/s4.9
200628.3°C28.0°C27.7°C29.2°C26.3°C318 mm84%3.9 m/s5
200528.6°C28.2°C27.8°C29.4°C26.8°C343 mm84%4.6 m/s4.7
2004 🌧️28.5°C28.1°C27.8°C29.6°C26.6°C581 mm85%6.5 m/s4
200328.8°C28.4°C28.1°C29.8°C26.5°C166 mm82%3.7 m/s5.7
200228.5°C28.1°C27.7°C29.2°C26.7°C292 mm84%5 m/s5.1
200128.8°C28.4°C28.1°C29.7°C27.2°C390 mm85%6.2 m/s4.8
200028.7°C28.3°C27.9°C29.8°C26.7°C266 mm82%4.6 m/s5.1
199928.5°C28.1°C27.7°C30.0°C26.5°C204 mm82%4.3 m/s5.5
199829.0°C28.7°C28.3°C29.8°C27.4°C98 mm81%3.9 m/s6
199728.3°C27.9°C27.6°C29.0°C26.4°C489 mm85%5.7 m/s4.9
199628.5°C28.1°C27.8°C29.2°C26.7°C114 mm81%3.3 m/s5.9
199528.5°C28.1°C27.6°C29.3°C26.4°C118 mm83%4.3 m/s5.2
199428.6°C28.2°C27.8°C29.9°C27.0°C95 mm82%3.4 m/s6
199327.8°C27.4°C27.1°C28.7°C26.4°C229 mm85%5 m/s5
199228.3°C27.9°C27.5°C28.9°C26.6°C266 mm84%4.6 m/s4.6
199128.9°C28.5°C28.2°C29.6°C27.4°C241 mm83%4.9 m/s5.1
199028.6°C28.2°C27.8°C29.3°C26.6°C368 mm83%5 m/s4.3
198927.9°C27.5°C27.2°C28.8°C26.4°C228 mm84%5 m/s4.9
198828.5°C28.1°C27.7°C29.1°C26.5°C62 mm80%3.7 m/s5.9
198728.5°C28.1°C27.7°C29.5°C27.0°C101 mm81%4.3 m/s5.8
198628.4°C28.1°C27.8°C29.3°C26.7°C272 mm84%6.6 m/s4.9
198527.7°C27.3°C26.9°C28.6°C26.2°C387 mm83%3.4 m/s5
1984 ❄️27.7°C27.2°C26.8°C28.6°C25.5°C409 mm82%3.3 m/s5
198328.1°C27.7°C27.3°C28.9°C26.3°C410 mm81%3.5 m/s—
198227.9°C27.5°C27.2°C28.7°C26.4°C238 mm82%4.1 m/s—
198128.7°C28.3°C27.9°C29.6°C26.0°C372 mm81%5.5 m/s—

Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.

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Agat August Weather — FAQ

What is the average temperature in Agat in August?▼

The average high in August is around 28.6°C with lows near 27.8°C (mean 28.2°C), based on 45 years of NASA POWER data.

Does it rain a lot in Agat in August?▼

August averages 277 mm of rainfall in Agat, a relatively wet time of year. The wettest on record was 581 mm in 2004.

What was the hottest August on record in Agat?▼

The hottest August reached 30.7°C in 2024. The coldest dipped to 25.5°C in 1984.

Has August in Agat gotten warmer over time?▼

Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 1°C. Daytime highs moved from 28°C to 29.1°C and overnight lows from 27.2°C to 28.2°C over the same span.

Is August a good time to visit Agat?▼

August is close to Agat's year-round average and a relatively wet time of year, so plan for around 28.6°C daytime highs and 27.8°C at night.

Is August the coldest month in Agat?▼

Not quite — August is the 6th coolest month in Agat, averaging 28.2°C.

What should I pack for Agat in August?▼

For August in Agat, pack light layers you can adjust through the day, with typical highs of 28.6°C and lows of 27.8°C. Bring an umbrella or light rain jacket too.

Is Agat humid in August?▼

Relative humidity in August averages 82% — quite humid.

How windy is Agat in August?▼

Average wind speed in August is 4.2 m/s. The windiest August on record averaged 6.6 m/s (1986).

Which August had the most rainfall in Agat?▼

The wettest August on record was 2004 with 581 mm. On average, August sees 277 mm.

Where does this August weather data come from?▼

All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.

Other Guam cities

Explore how the weather in Agat behaves each August, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for August specifically, along with year-by-year records and how the month has changed over the decades.