Panajachel (Lake Atitlán) weather in September
September in Panajachel: warm, soaked, with muggy air — a gamble, with 27 rainy days.
Updated September 2026 · climate normals from ERA5 reanalysis
#11 of 12 months in Panajachel · #1141 of 1413 destinations to visit in September · comfort 60/100 (tier C)
- Days
- 23°C
- Nights
- 18°C
- Wet days
- 27
- Sun
- 9.2 h
- Humidity
- 88%
- Daylight
- 12 h
Traveller notes on Panajachel in September
Other months in Panajachel
Lake Atitlán/Panajachel forum threads describe August as a genuine mixed bag - some stretches bring very little rain for weeks, other times it rains most afternoons for an hour or two, with tropical-storm-driven multi-day rain the real exception rather than the norm. The typical daily pattern posters described: gorgeous mornings, then a chance of rain arriving after around 2pm, sometimes hard but usually brief. Crucially, several regulars pointed out it's never oppressively hot here even in the rainy season, since the lake's highland elevation keeps temperatures moderate regardless of rainfall - a rain jacket was the standard packing tip rather than heat gear.
Forum posters describe a consistent daily pattern here in February: warm enough for short sleeves and shorts by day, cooling to genuine sweater weather once the sun goes down - a real day-to-night swing typical of this lake's elevation. February sits squarely in the dry season, with posters noting humidity stays low enough that air conditioning generally isn't needed. Rain isn't common this time of year but does occasionally happen, and posters mention an occasional cold front can push daytime temperatures down enough to want a sweater even before evening. Overall, posters consistently rate February among the more comfortable, predictable months for exploring Panajachel and the villages around Lake Atitlan.
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Panajachel climate normals — September
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Panajachel in September
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
BusyIndependence Day, school holidays in 2 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Panajachel's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Toughest weatherPanajachel's weather peaks December–February, best around January.
Best weatherFair weatherToughest weather
What's on in Panajachel in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
The Xocomil
1 Jan – 31 DecWind seasonRiskWarm Pacific air meeting cold air off the highlands raises the Xocomil across Atitlán from late morning most days, hard enough to turn a boat over. Cross to San Pedro or Santiago early and be back before the afternoon. Source ↗
- Holiday
Independence Day
14–15 SepNational holidayClosuresCrowdedTorch runners come down the road from Sololá on the evening of the fourteenth and the school bands take the main street the next morning. Banks and offices shut for the day. Source ↗
- Season
Wet season
MonsoonRisk27 rainy days and about 369 mm in the month — the real kind of rainy season, not afternoon showers.
from the climate normals
Nearby, and something's on
Within 300 km of Panajachel — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Panajachel?
Panajachel in September — FAQ
- Is September a good time to visit Panajachel?
- September in Panajachel: warm, soaked, with muggy air — a gamble, with 27 rainy days. It ranks #11 of 12 months for Panajachel on SeasonMap's comfort score (60/100).
- What is the weather like in Panajachel in September?
- In September, Panajachel averages a daily high of 22.9°C and a low of 17.8°C, with about 368.9 mm of rain over roughly 26.9 rainy days.
- What is the air quality in Panajachel in September?
- Panajachel has a mean US Air Quality Index of about 58 in September.
Within 300 km: Lake Atitlán's Independence Day on 14–15 Sep, and Antigua Guatemala's Independence Day on 14–15 Sep.