The standard Acatenango trip is an overnight one (two days and a night, as our hike page sets out), so the forecast that matters is not the daytime one: it is the night on the mountain. This page takes a forecast for the Acatenango summit and reduces each night, from 6 PM to 6 AM, to three numbers: the lowest temperature, the strongest wind and the rain.
The nights ahead on the summit
Pulled Nov 8, 2026 at 21:04 Guatemala time from MET Norway and OpenWeather.
Weather data provided by OpenWeather
Data from MET Norway (CC BY 4.0); processed by us| Night starting | Low, 6pm–6am | Strongest wind overnight | Overnight rain | Forecast steps | Daytime high | Rain chance noon–6pm |
|---|---|---|---|---|---|---|
| Mon Nov 9 | 0°C (32°F) | 11 km/h (7 mph) | 0 mm | hourly | 10°C (50°F) | 65% |
| Tue Nov 10 | 0°C (32°F) | 10 km/h (6 mph) | 0 mm | hourly | 9°C (48°F) | 90% |
| Wed Nov 11 | 0°C (32°F) | 4 km/h (2 mph) | 0 mm | 6-hourly | 9°C (48°F) | 100% |
| Thu Nov 12 | 0°C (32°F) | 5 km/h (3 mph) | 0.1 mm | 6-hourly | 8°C (46°F) | 97% |
| Fri Nov 13 | 1°C (34°F) | 5 km/h (3 mph) | 0 mm | 6-hourly | 9°C (48°F) | 59% |
Point 14.501, -90.876 (Acatenango summit; listed elevation 3,976 m). MET Norway's temperatures are for 3,976 m there (the altitude we send it); MET gives hourly steps until Nov 11, 11 AM, then 6-hourly. Overnight low, wind and rain are MET Norway's; the afternoon rain chance comes from OpenWeather's forecast steps, stamped every 3 hours (Guatemala time), as the highest of its noon and 3 PM steps. A forecast, not a measurement. Temperatures in °C (°F), wind in km/h (mph).
How to read it. Each row is the night that starts on that date. Low is MET Norway’s lowest forecast air temperature between 6 PM and 6 AM. Strongest wind is MET’s highest forecast wind speed at its steps overnight. Overnight rain is MET’s forecast total for the 12 hours. Forecast steps says whether MET’s steps that night are hourly (for about the first 2.5 days) or 6-hourly (after that), so later nights rest on fewer values. The daytime rain chance comes from OpenWeather. The last two columns are for the daytime of that date, the ascent day for a standard overnight trip.
What the numbers are, and are not
- A summit point, not your camp. The forecast is for the summit coordinates (14.501 N, 90.876 W), and we ask MET Norway for the listed summit elevation, 3,976 m. A camp lower on the mountain can have a different temperature and wind, and a sheltered hollow can differ from an exposed ridge a few metres away.
- A forecast, not a measurement. No weather station feeds this table; it is a model estimate, refreshed daily.
- Not about the volcano. Rain and wind forecasts say nothing about Fuego’s activity or about whether the trail is open. For eruptions, bulletins and ash, see volcano eruption today. Access decisions have come from more than one body (the Municipalidad de Acatenango, the national park and INGUAT): our Acatenango hike page carries the latest access notes we have verified, and your operator is the one to ask about the day’s position.
Planning with it
- Packing: the low and the wind columns are the ones to pack for.
- Choosing a night: compare the wind and rain columns across the nights shown; a calmer, drier night is the one to aim for if your dates are flexible.
- Sunrise from the summit: the week’s sunrise and sunset times for the summit point are in sunrise and sunset times in Guatemala.
- Down in Antigua before or after the climb: Antigua weather.
The long-form planning guide, from operators to packing, is the Acatenango overnight hike guide. For the months with less rain, see the best time to visit Guatemala, month by month.
Month by month: 30-year averages at the summit
For choosing a month rather than a night, this is the summit’s average weather by month over 1996-2025, from Open-Meteo’s ERA5 reanalysis archive, requested for the summit coordinates and the listed 3,976 m elevation:
| Month | Average high | Average low | Rain (mm) | Days with 1 mm or more |
|---|---|---|---|---|
| January | 8 °C (47 °F) | -3 °C (27 °F) | 14 | 5 |
| February | 9 °C (49 °F) | -2 °C (28 °F) | 19 | 6 |
| March | 10 °C (50 °F) | -2 °C (29 °F) | 47 | 13 |
| April | 10 °C (49 °F) | 0 °C (31 °F) | 108 | 21 |
| May | 8 °C (47 °F) | 0 °C (33 °F) | 284 | 29 |
| June | 7 °C (45 °F) | 0 °C (32 °F) | 372 | 29 |
| July | 8 °C (46 °F) | 0 °C (31 °F) | 247 | 27 |
| August | 8 °C (46 °F) | 0 °C (32 °F) | 299 | 29 |
| September | 7 °C (45 °F) | 0 °C (32 °F) | 395 | 29 |
| October | 7 °C (44 °F) | 0 °C (31 °F) | 325 | 29 |
| November | 7 °C (45 °F) | -2 °C (29 °F) | 101 | 18 |
| December | 8 °C (46 °F) | -2 °C (28 °F) | 27 | 9 |
Source: Open-Meteo’s historical weather archive (ERA5 reanalysis), daily values for 1996-2025 averaged by calendar month (read 4 November 2026). Reanalysis is a gridded weather-model reconstruction, not a station record, so treat these as indicative averages rather than measurements on the mountain. The model adjusts temperature to the requested height; it does not know your camp’s exact position, shelter or wind.
Where the forecast comes from
The table is built from MET Norway’s locationforecast (night low, wind, rain, daytime high), with the afternoon rain chance from OpenWeather’s 5-day, 3-hour forecast, read once a day by our data pipeline for the Acatenango summit coordinates. The stamp above the table shows when they were read. If a day’s read fails, the previous file stays in place: the page keeps showing that forecast, drops any days that have already passed when the page is rebuilt, and the stamp turns red once the forecast is more than 26 hours old. Guatemala’s official weather and volcano service is INSIVUMEH. Summit coordinates and elevation: the Acatenango entry on Wikipedia (14° 30′ 03″ N, 90° 52′ 33″ W; 3,976 m).
Frequently Asked Questions
How cold is it on Acatenango at night?
The table on this page gives MET Norway’s forecast low on the summit for each night in the forecast, from 6 PM to 6 AM. We ask MET for the summit elevation listed on Wikipedia, 3,976 m, so its temperatures are for that height.
Why is there no feels-like or gust column?
Because none of our free sources gives one for the summit height. OpenWeather’s point forecast, which supplies feels-like and gusts elsewhere on this site, does not take an altitude, so its values would describe a lower elevation. The table shows MET Norway’s strongest forecast wind speed overnight instead.
Should I cancel my Acatenango hike because of the forecast?
This page cannot make that call for you, and neither can a model point. It shows the numbers for the summit so you can pack for them and ask your operator the right questions. Access to the trail is a separate matter: decisions have come from more than one body, including the Municipalidad de Acatenango, the national park and INGUAT, as our Acatenango hike page records. Check that page, our volcano status page and your operator before you travel.
How cold is Acatenango by month?
At the summit height of 3,976 m, Open-Meteo’s ERA5 reanalysis archive averages lows of about -3 °C in January and -2 °C in December over 1996-2025, and lows close to 0 °C from May to October, the six wettest months in the series (395 mm in September on average). Camps sit lower than the summit. The month-by-month table is on this page; it is a model reconstruction, not a station record.
Where can I see whether Fuego is erupting?
Our volcano eruption today page gathers INSIVUMEH’s volcano bulletins, CONRED alerts and ash advisories for Fuego and the other active volcanoes. The weather forecast here says nothing about volcanic activity.
