Warm
Average highs sit around 31°C, giving warm days by monthly-average standards.
October verdict
Guam in October
Weather score45Mixed
Mixed for holiday weather
Average highs sit around 31°C, giving warm days by monthly-average standards. Sunshine averages 4.3h per day, so this is not one of the brighter months. Rainfall averages 317mm, so showers are a real planning factor.
October weather
Monthly averages
Temp
31°C
Rain
317mm
Sun
4.3h
Sea
29°C
Weather score
45
Mixed
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 317mm, so showers are a real planning factor.
Limited sun
Sunshine averages 4.3h per day, so this is not one of the brighter months.
Warm sea
Sea temperatures average 29°C, so swimming is usually comfortable by monthly-average standards.
Map
Weather map
Compare Guam with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
October31°C average high
October is close to Guam's usual daytime heat, with little temperature swing across the year.
Warmest monthsAll year
Daytime heat stays consistently warm through the year.
Rain
October317mm average rain
October is wetter than Guam's yearly average, so flexible plans matter more.
Driest monthsJanuary to June and December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
October4.3 hours average sun
October is one of Guam's cloudier months, so sunshine-led plans are less reliable.
Brightest monthsMarch to June
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
October29°C average sea
October sits in the warmer sea-temperature season, usually making swimming easier to enjoy.
Warmest seaMay to December
Sea temperatures are usually near 29°C in this stretch, so swimming comfort is at its strongest.
Weather score
October45 weather score
October is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.
Best weather monthsJanuary to June
These months have the strongest weather score in the monthly averages.
