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San Carlos Weather in September
San Carlos in September sees very high daytime temperatures of 31°C (88°F) and nighttime lows of 24°C (75°F). As part of the rainy season, showers are frequent and often heavy. Budget around 278 mm (11 in) of rainfall for the month.
Rainfall in San Carlos in September
As part of the rainy season, San Carlos sees around 23 days of rain in September, with an average of 278 mm (11 in). The rainy season here brings regular, substantial showers. It's worth being prepared for rain on most days you're out.
Temperature in San Carlos in September
Daytime highs in San Carlos in September reach 31°C (88°F), with nights around 24°C (75°F). Sunshine and humidity can make it feel even warmer than the raw temperature suggests. With overnight lows of 24°C (75°F), evenings and nights remain warm. Light clothing and an open window or fan can help you sleep comfortably.Our weather planner can help you find worldwide destinations with pleasant weather during this period. January typically offers the best weather for San Carlos.
San Carlos Temperature in September
Min Temperature
24°C (75°F)
Max Temperature
31°C (88°F)
Chance of Rain
76%
Precipitation
278 mm (11 in)
Rainy days
23 days
Humidity
88% *
* Data from: Los Chiles, Costa Rica (12 KM, 7 Miles).
San Carlos Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in San Carlos - and find the best time to visit.
Historical weather records for San Carlos in September
Browse day-by-day weather records for San Carlos spanning 23 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
San Carlos historical weather extremes in September
Based on 20 years of weather observations (2006-2026), these are the most extreme conditions recorded in San Carlos.
- The hottest September day on record in San Carlos reached 34°C (93°F) (September 13, 2017).
- The coldest September day was on September 3, 2014, with a maximum of 24°C (75°F).
- Nighttime temperatures dropped to 21°C (70°F) on September 26, 2007, marking the coldest September night on record.
- The wettest September day on record brought 78 mm (3.1 in) of precipitation to San Carlos (September 26, 2022).
Best Places in Nicaragua in September
Find out more about the weather in Nicaragua and which places have the best travel conditions in this month. See all of Nicaragua 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 San Carlos in September
Warm but pleasant conditions in San Carlos in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. It's going to pour! Pack a good poncho and prepare for very wet conditions.
What To Do in San Carlos in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling7/10 -
Walking7/10 -
Camping6/10 -
Outdoor sports7/10
San Carlos 3-Day Forecast
More climate data for San Carlos
See the full San Carlos climate overview or explore weather in Nicaragua.
Popular in September
Where to go in September - average daytime high across popular destinations.
Managua
33°C (91°F) León32°C (90°F) Popoyo30°C (86°F) Estelí30°C (86°F) Granada31°C (88°F) Big Corn Island29°C (84°F) Moyogalpa29°C (84°F) San Juan del Sur29°C (84°F) Bucket list
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