Warm
Average highs sit around 30°C, giving warm days by monthly-average standards.
September verdict
Northern Islands Municipality, Northern Mariana Islands in September
Weather score59Good
Good for holiday weather
Average highs sit around 30°C, giving warm days by monthly-average standards. Sunshine averages 0h per day, so this is not one of the brighter months. Rainfall averages 210mm, so showers are a real planning factor.
September weather
Monthly averages
Temp
30°C
Rain
210mm
Sun
0h
Sea
30°C
Weather score
59
Good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 210mm, so showers are a real planning factor.
Limited sun
Sunshine averages 0h per day, so this is not one of the brighter months.
Warm sea
Sea temperatures average 30°C, so swimming is usually comfortable by monthly-average standards.
Map
Weather map
Compare Northern Islands Municipality, Northern Mariana Islands with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September30°C average high
September sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsMay to December
This stretch sets the upper range for average daytime heat.
Rain
September210mm average rain
September is wetter than Northern Islands Municipality's yearly average, so flexible plans matter more.
Driest monthsJanuary to June and November to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September0 hours average sun
September is close to Northern Islands Municipality's usual sunshine level, with limited seasonal swing across the year.
Brightest monthsAll year
Sunshine stays consistently strong through the year.
Sea temperature
September30°C average sea
September is one of Northern Islands Municipality's warmest sea months, when swimming comfort is usually strongest.
Warmest seaMay to November
Sea temperatures are usually near 29°C in this stretch, so swimming comfort is at its strongest.
Weather score
September59 weather score
September scores below Northern Islands Municipality's yearly average, so the weather trade-offs are more noticeable.
Best weather monthsJanuary to June
These months have the strongest weather score in the monthly averages.