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Colonia Weather in September
September in Colonia typically sees daytime highs of 30°C (86°F) and nighttime lows of 26°C (79°F). September falls within the rainy season, so heavy rainfall is to be expected.
Rainfall in Colonia in September
Colonia is in the rainy season in September, with rain on around 17 days and an average of 315 mm (12 in). The rain this month falls heavily when it arrives. Late afternoons in particular can see strong showers, so waterproofs are worth keeping handy.
Temperature in Colonia in September
If you're visiting Colonia in September, expect highs of 30°C (86°F) and overnight lows around 26°C (79°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. At 26°C (79°F) overnight, the heat doesn't let up much after dark. If you're staying somewhere without air conditioning, a cold shower before bed and keeping the air moving can help.
Sunshine in Colonia in September
With about 183 hours of sunshine, the area enjoys a nice balance of sun and rainy moments, creating a pleasant environment.September in Colonia has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.
Colonia Temperature in September
Min Temperature
26°C (79°F)
Max Temperature
30°C (86°F)
Chance of Rain
57%
Precipitation
315 mm (12 in)
Rainy days
17 days
Humidity
84%
Sunshine
183 hours
Percentage Sunshine
Colonia Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Colonia - and find the best time to visit.
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Colonia typically stay consistent throughout September, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 25°C (77°F).
Average temperatures in September
Daily Historical Precipitation
49-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather records for Colonia in September
Browse day-by-day weather records for Colonia spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Colonia historical weather extremes in September
Based on 20 years of weather observations in Colonia between 2006 and 2026, these are the recorded extremes.
- Colonia recorded its highest September temperature of 36°C (97°F) on September 24, 2010.
- On September 17, 2016, Colonia saw its coldest September day with temperatures maxing out at 27°C (81°F).
- Nighttime temperatures dropped to 23°C (73°F) on September 26, 2025, marking the coldest September night on record.
- Peak precipitation in September occurred on September 25, 2011, when 115 mm (4.5 in) of precipitation was measured.
Best Places in Micronesia in September
Find out more about the weather in Micronesia and which places have the best travel conditions in this month. See all of Micronesia in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Colonia in September
Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Also bring a poncho, it will rain a lot! Waterproof everything you can. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.
What To Do in Colonia in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming7/10 -
Cycling7/10 -
Walking7/10 -
Camping7/10 -
Outdoor sports7/10
Colonia 3-Day Forecast
More climate data for Colonia
Temperature Rainfall Sunshine Humidity
See the full Colonia climate overview or explore weather in Micronesia.
Popular in September
Where to go in September - average daytime high across popular destinations.
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
Go to Micronesia
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