Garapan Weather in September
September in Garapan brings high temperatures, with daytime highs of 30°C (86°F) and nights around 27°C (81°F). It's part of the rainy season, with 322 mm (13 in) of rainfall on average, so an umbrella or poncho is a good idea.
Rainfall in Garapan in September
As part of the rainy season, Garapan sees around 19 days of rain in September, with an average of 322 mm (13 in). Showers during the rainy season tend to be heavy and can come down intensely. An umbrella is often not enough, so a poncho or waterproof jacket is a better choice.
Temperature in Garapan in September
Garapan in September gets highs of 30°C (86°F) during the day and drops to 27°C (81°F) at night. Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights remain warm at around 27°C (81°F). For a more comfortable sleep, a cold shower before bed and a fan or air conditioning can make a big difference.September in Garapan can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Northern Mariana Islands, check out our Garapan's climate page.
Garapan Temperature in September
Min Temperature
27°C (81°F)
Max Temperature
30°C (86°F)
Chance of Rain
65%
Precipitation
322 mm (13 in)
Rainy days
19 days
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Garapan typically stay consistent throughout September, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 26°C (79°F).
Average temperatures in September
Historical weather for Garapan in September
Browse day-by-day weather records for Garapan spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Garapan historical weather extremes in September
The extremes listed below come from historical weather data collected in Garapan from 1992 through 2025.
- The hottest September day on record in Garapan reached 34°C (93°F) (September 14, 1994).
- The lowest daytime temperature in September was 26°C (79°F), recorded on September 13, 2007.
- The coldest night in September in Garapan was on September 27, 1997, with a minimum of 22°C (72°F).
Best Places in Northern Mariana Islands in September
Find out more about the weather in Northern Mariana Islands and which places have the best travel conditions in this month. See all of Northern Mariana Islands in September →
perfect weather
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tolerable
unpleasant
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What to Wear in Garapan in September
Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Heavy rain is guaranteed, please bring a good poncho and waterproof everything!What To Do in Garapan in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Northern Mariana Islands, check out our Garapan's climate page.
See the full Garapan climate overview or explore weather in Northern Mariana Islands.
