Agat Weather in October (1981–2025)

📍 13.36°N, 144.66°E •
📊

October at a Glance in Agat

(1981–2025)
Avg High
🔥
28.7°C
Avg Low
❄️
28.0°C
Avg Temp
🌡️
28.4°C
Avg Rain
🌧️
203 mm
Avg Humidity
💧
82%
Avg Wind
🌬️
4.6 m/s
Avg Solar
☀️
5
kWh/m²/day
vs Annual
📈
+0.4°C
temp difference
🌡️Warm afternoons🌙Warm mornings☀️Very sunny🌧️Wet month💨Breezy💦Humid air

Agat October Weather Overview

October is close to Agat's year-round average, with average highs near 28.7°C and lows around 28°C (mean 28.4°C). It is a relatively wet time of year, averaging 203 mm of rainfall and 82% relative humidity across the period.

Agat October Temperature History (1981–2025)

Range

October is close to Agat's year-round average. Across 45 years of records, the warmest October in Agat was 2023 — when the month averaged 28.9°C — while the coldest was 1982 at 27.5°C. Typical October days reach 28.7°C with nights near 28°C. The long-term October temperature trend is broadly flat.

1981–1985 vs 2021–2025

Avg Temp28.1°C→28.6°C+0.5°C
Max Temp28.4°C→29.0°C+0.6°C
Min Temp27.7°C→28.2°C+0.5°C

Trend (per decade)

Avg Temp+0.1°C/decade ↗
Max Temp+0.2°C/decade ↗
Min Temp+0.1°C/decade ↗

Distribution of Avg Temp

27.0°C–27.5°C0 yr (0%)
27.5°C–28.0°C5 yr (11%)
28.0°C–28.5°C21 yr (47%)
28.5°C–29.0°C19 yr (42%)

Agat October Rainfall History (1981–2025)

Range

October is a relatively wet time of year in Agat, averaging 203 mm of rainfall. The wettest October on record was 2013 with 445 mm, while the driest was 1992 at 84 mm.

Agat October Humidity History (1981–2025)

Range

Relative humidity in Agat during October averages 82%. The most humid October was 2003 at 84%, and the least humid was 1997 at 78%.

Agat October Solar History (1981–2025)

Range

October receives about 5 kWh/m²/day of solar energy in Agat. The sunniest October was 2002 at 5.8 kWh/m²/day, and the cloudiest was 2006 at 3.9.

Agat October Wind History (1981–2025)

Range

Average wind speed in Agat during October is 4.6 m/s. The windiest October was 2006 at 5.9 m/s, while the calmest was 2021 at 3.6 m/s.

What October Feels Like in Agat

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

How October Ranks in Agat

🔥3rd warmest month of the year
🌧️3rd wettest month of the year
☀️9th sunniest month of the year

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

Explore Agat Weather by Month

Agat October Averages by Decade

Metric1980s1990s2000s2010s2020sChange
Avg Temp28.1°C28.2°C28.4°C28.5°C28.6°C+0.5°C
Avg High28.4°C28.6°C28.8°C28.8°C29.1°C+0.7°C
Avg Low27.7°C27.9°C28.1°C28.1°C28.2°C+0.5°C
Avg Rain206 mm147 mm199 mm248 mm224 mm+19 mm

Extreme October Records in Agat

🔥Warmest October30.1°C1987
🧊Coldest October25.9°C1985
🌧️Wettest October445 mm2013
🏜️Driest October84 mm1992
🌬️Windiest October5.9 m/s2006

Key Insights for October

✅

October temperatures in Agat have risen by about 0.5°C between 1981–1985 and 2021–2025.

✅

October has ranged from a record low of 25.9°C (1985) to a record high of 30.1°C (1987).

✅

Rainfall in October is a relatively wet time of year, averaging 203 mm, with a wettest year of 445 mm.

Is October 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, October — with days averaging 28.7°C and nights around 28°C (mean 28.4°C) and higher rainfall (203 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 October — In Depth

☀️ October climate overview

October is close to Agat's year-round average, with average highs near 28.7°C and lows around 28°C (mean 28.4°C). It is a relatively wet time of year, averaging 203 mm of rainfall and 82% relative humidity across the period.

🌧️ Rain, humidity & wind in October

October averages 203 mm of rainfall in Agat, a relatively wet time of year compared with the rest of the year. The wettest October on record saw 445 mm (2013), and the driest just 84 mm (1992). Humidity sits around 82% and average wind speed is 4.6 m/s, with solar radiation averaging 5 kWh/m²/day.

📈 How October has changed

Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 0.5°C. Daytime highs moved from 28.4°C to 29°C and overnight lows from 27.7°C to 28.2°C over the same span.
October Weather in Agat, Year by Year
🔥 warmest❄️ coldest🌧️ wettest
YearAvg HighAvg TempAvg LowHottest DayColdest DayRainfallHumidityWindSolar
202529.1°C28.7°C28.4°C29.8°C27.3°C188 mm82%4 m/s5
202429.1°C28.7°C28.2°C29.8°C26.9°C226 mm83%3.9 m/s4.8
2023 🔥29.3°C28.9°C28.5°C30.0°C27.7°C176 mm83%4.7 m/s5.2
202228.8°C28.3°C27.9°C29.8°C27.2°C234 mm83%3.9 m/s4.6
202128.8°C28.4°C27.9°C29.5°C27.1°C304 mm82%3.6 m/s4.5
202029.2°C28.8°C28.3°C30.0°C27.0°C217 mm81%3.9 m/s4.9
201928.9°C28.5°C28.2°C29.5°C27.0°C197 mm81%3.9 m/s5.1
201828.8°C28.4°C28.0°C29.5°C27.0°C114 mm83%4.3 m/s5.5
201729.0°C28.6°C28.2°C29.7°C26.6°C261 mm82%4.3 m/s4.4
201629.1°C28.8°C28.4°C29.8°C27.3°C201 mm82%4.5 m/s5.3
201528.9°C28.5°C28.1°C30.1°C27.1°C141 mm81%4.8 m/s5
201428.7°C28.2°C27.8°C29.6°C27.0°C320 mm83%3.9 m/s4.7
2013 🌧️28.9°C28.5°C28.0°C29.5°C26.9°C445 mm83%5.7 m/s4.5
201228.8°C28.4°C28.0°C29.7°C26.7°C274 mm82%5 m/s4.6
201128.6°C28.2°C27.9°C29.3°C27.0°C282 mm81%4.4 m/s4.7
201028.8°C28.4°C28.1°C29.3°C26.8°C241 mm81%4.4 m/s5.1
200928.9°C28.5°C28.2°C29.5°C26.8°C202 mm83%5.3 m/s5
200828.9°C28.6°C28.3°C29.7°C27.2°C108 mm81%4.8 m/s5.7
200728.6°C28.1°C27.7°C29.3°C26.9°C267 mm83%4 m/s4.7
200628.6°C28.3°C27.9°C29.9°C26.5°C422 mm83%5.9 m/s3.9
200528.7°C28.3°C28.0°C29.3°C26.8°C225 mm83%4.4 m/s5
200428.7°C28.3°C28.0°C29.4°C27.0°C187 mm83%5.1 m/s5.2
200329.0°C28.7°C28.3°C29.8°C26.9°C216 mm84%4.4 m/s4.8
200228.9°C28.6°C28.3°C30.0°C26.8°C93 mm80%4.9 m/s5.8
200128.9°C28.6°C28.2°C29.6°C27.1°C106 mm79%4.4 m/s5.7
200028.7°C28.4°C28.0°C29.5°C26.9°C167 mm82%4.9 m/s5.3
199929.0°C28.6°C28.2°C29.7°C27.1°C154 mm80%4.9 m/s5.4
199829.0°C28.6°C28.2°C29.8°C27.0°C198 mm81%5.2 m/s5.4
199729.0°C28.6°C28.2°C29.7°C27.3°C136 mm78%4.7 m/s5.3
199628.8°C28.5°C28.2°C29.8°C27.7°C101 mm82%4 m/s5.1
199528.6°C28.3°C27.9°C29.4°C27.0°C165 mm83%4.9 m/s4.8
199428.3°C28.0°C27.6°C29.1°C26.7°C194 mm81%4.6 m/s5.2
199328.2°C27.8°C27.4°C28.7°C26.1°C134 mm82%4.4 m/s5.3
199228.5°C28.1°C27.8°C29.4°C26.7°C84 mm81%3.9 m/s5.2
199128.1°C27.8°C27.5°C28.7°C26.3°C212 mm82%5.3 m/s5
199028.5°C28.1°C27.8°C29.2°C26.8°C89 mm82%4.2 m/s5.3
198928.2°C27.9°C27.5°C29.0°C26.5°C147 mm82%4.9 m/s5.1
198828.4°C28.0°C27.6°C29.3°C26.6°C162 mm82%4.1 m/s4.7
198728.8°C28.4°C28.0°C30.1°C27.0°C216 mm81%5.1 m/s5.1
198628.5°C28.1°C27.7°C29.2°C26.8°C108 mm81%5.2 m/s5.5
198528.1°C27.8°C27.4°C29.3°C25.9°C98 mm81%4.8 m/s5.4
198428.3°C28.0°C27.6°C29.2°C26.8°C235 mm82%4.3 m/s5.1
198328.7°C28.3°C28.0°C29.1°C27.2°C291 mm80%4.4 m/s—
1982 ❄️27.9°C27.5°C27.1°C28.6°C26.1°C397 mm81%4.9 m/s—
198129.0°C28.7°C28.4°C29.9°C27.3°C198 mm81%5.7 m/s—

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

Other Cities in Guam

Agat October Weather — FAQ

What is the average temperature in Agat in October?▼

The average high in October is around 28.7°C with lows near 28°C (mean 28.4°C), based on 45 years of NASA POWER data.

Does it rain a lot in Agat in October?▼

October averages 203 mm of rainfall in Agat, a relatively wet time of year. The wettest on record was 445 mm in 2013.

What was the hottest October on record in Agat?▼

The hottest October reached 30.1°C in 1987. The coldest dipped to 25.9°C in 1985.

Has October in Agat gotten warmer over time?▼

Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 0.5°C. Daytime highs moved from 28.4°C to 29°C and overnight lows from 27.7°C to 28.2°C over the same span.

Is October a good time to visit Agat?▼

October is close to Agat's year-round average and a relatively wet time of year, so plan for around 28.7°C daytime highs and 28°C at night.

Is October the coldest month in Agat?▼

Not quite — October is the 10th coolest month in Agat, averaging 28.4°C.

What should I pack for Agat in October?▼

For October in Agat, pack light layers you can adjust through the day, with typical highs of 28.7°C and lows of 28°C. Bring an umbrella or light rain jacket too.

Is Agat humid in October?▼

Relative humidity in October averages 82% — quite humid.

How windy is Agat in October?▼

Average wind speed in October is 4.6 m/s. The windiest October on record averaged 5.9 m/s (2006).

Which October had the most rainfall in Agat?▼

The wettest October on record was 2013 with 445 mm. On average, October sees 203 mm.

Where does this October 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 October, 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 October specifically, along with year-by-year records and how the month has changed over the decades.