The first thing I went I learned about the weather in Ecuador is do not trust the weather predictions. The online forecast is pretty much always wrong. The second thing I learned is, be ready for very sudden changes in weather while you are out there trekking or climbing. Unpredictable weather is the norm in the Ecuadorian mountains. Check out our upcoming trips.
Weather Conditions on Our Treks and Climbs in Ecuador
Ecuador offers exceptional trekking and mountaineering all year round. Because it sits directly on the equator. While most of our trips are either lodge-to-lodge trekking or climbing Cotopaxi, we do offer a range of alternative itineraries. We take groups on traditional tours, city tours, Bird watching and Jungle tours. When we climb on Cayambe we walk across the equator on a glacier. Cayambe is the only place in the world where you can do this. A unique experience only Ecuador has to offer.
The country’s weather is determined more by altitude and local microclimates than by traditional seasons. Don’t study the weather apps too much before arriving. The Cayambe, Cotopaxi and Chimborazo are affected by very different weather patterns.
It can be raining in Quito and clear on Cotopaxi which is only 40 miles away. The weather also changes very quickly across the mountains of Ecuador.
Understanding the weather conditions in Ecuador’s Andes will help you prepare properly for treks and climbs on Cotopaxi, Cayambe, Chimborazo, and other iconic peaks. Follow us on X.
When Is the Best Time for Trekking and Climbing
The best time to trek and climb are from May to September, when Ecuador’s dry season brings clear skies, stable conditions, and firm snow on the glacier. A secondary good season runs from November to February, offering calm mornings and fewer climbers.
Conditions are typically cold and windy above 17,000 feet (5,000m), with temperatures ranging from -5°C to -15°C (23–5°F). While trekking in Ecuador and climbing Cotopaxi can be achieved year-round, weather changes rapidly, so flexibility and guidance from an experienced guides is essential for a safe and successful ascent.
Year-Round Weather in the Andes
Ecuador experiences two main weather patterns:
- Dry Season (May to September): Clear mornings, minimal rainfall, and stable weather make this the best time for most climbing expeditions. Winds can pick up in the afternoons, especially at higher elevations.
- Wetter Season (October to April): Expect more afternoon rain showers and occasional storms. However, mornings are often bright and calm, offering excellent climbing windows and lush green landscapes.
Because of Ecuador’s equatorial position, temperature doesn’t vary drastically throughout the year, but conditions at altitude can shift quickly.
Typical Daily Temperatures by Elevation
- Quito (2,850m / 9,350ft): Daytime 18–22°C (64–72°F); nighttime 8–12°C (46–54°F)
- Cotopaxi at (4,500m / 14,760 feet): Daytime 5–10°C (41–50°F); nighttime -5 to 0°C (23–32°F)
- High on Cotopaxi (5,000–6,000m / 16,400–19,685ft): Daytime -5 to -10°C (23–14°F); nighttime -10 to -20°C (14 to -4°F)
Expect wind chill to make it feel significantly colder on exposed ridges or glaciers, especially above 5,000m. Clear skies can quickly turn into snow or sleet, so always be ready for changing conditions.
Pro tip: I Don’t normally wear Gore-Tex rain gear high in the Himalaya’s, but I do every time in Ecuador.
How to Dress for the Mountains of Ecuador
Weather in the mountains and around the volcanoes changes fast, and layering your clothing is key. Plan on having a range of clothing with you on any given day. You will be adjusting your layers throughout the day as you move between elevations. This is guaranteed.
When the sun comes out on trekking days, you will need a sun hoody, mid layer and rain gear. A range of layers need need to be in your backpack every day. Bring all the gear and our guides will brief you on what to bring with you each day of the trip.
Recommended Clothing System High on Cotopaxi:
- Base Layer: Breathable thermal top and leggings to wick away moisture.
- Mid Layer: Fleece or lightweight softshell jacket for insulation.
- Outer Layer: Waterproof and windproof shell to block rain, wind, and snow.
- Insulation Layer: Down or synthetic puffy jacket for summit days and cold nights.
- Accessories: Warm hat, buff or neck gaiter, waterproof gloves, sun hat, and glacier-rated sunglasses.
Footwear
Waterproof trekking boots for approach hikes and double mountaineering boots are recommended for summit climbs on Cotopaxi, Cayambe and Chimborazo.
How to Manage Weather at High Altitude
- Start Early: Most summit attempts begin around midnight to take advantage of calm, stable morning conditions.
- Stay Hydrated: Cold air, high altitude and high winds increase fluid loss — drink consistently throughout the day.
- Use Sun Protection: UV exposure near the equator is extreme, even under cloud cover. Apply SPF 50+ sunscreen regularly.
- Expect Variety: You can experience four seasons in a single day — be mentally and physically ready for changing weather.
Best Time to Climb Cotopaxi
Cotopaxi (5,897m / 19,347ft) is one of the most popular high-altitude climbs in all of South America. Because of its location and elevation, weather patterns play a big role in your summit success. Traditionally weather flows in from the Amazon so we are always look east for weather patterns.
Ideal Climbing Seasons
- May to September: This is the main climbing season, offering the driest and most stable weather. Clear nights and firm snow conditions are common, making it the most reliable window for summit success.
- December to February: A secondary good season, especially for those combining Cotopaxi with Cayambe. Conditions can be excellent, though rain showers are more likely in the afternoons.
- March, April and October: Transitional months with higher rainfall, but still possible for experienced climbers with flexible itineraries.
Temperature and Conditions on Cotopaxi
At high camp (4,800–5,000m), nighttime temperatures typically range between -5°C to -10°C (23–14°F), dropping lower on the summit ridge. Wind speeds vary but can exceed 30–40 km/h on exposed slopes.
Cotopaxi’s weather is also influenced by the Intertropical Convergence Zone, meaning conditions can change rapidly. That’s why it’s crucial to climb with a professional, experienced guide team who can monitor weather and adjust plans safely.
Frequently Asked Questions About Weather in Ecuador
1). When is the best time to trek or climb in Ecuador?
The most stable weather generally occurs between May through September, with a secondary good season from November to February. However, trekking and acclimatization hikes can be done year-round with proper preparation.
2). How cold does it get on the mountains?
At 10,000 feet the temperatures can range from 5°C to 20°C. On the high peaks above 5,000m, expect temperatures from -5°C to -15°C (23–5°F), often colder with wind chill.
3). Does it snow in Ecuador?
Yes. Snow and ice are found year-round on high peaks like Cotopaxi, Cayambe, and Chimborazo, but lower valleys and trekking routes typically remain snow-free.
4. What should I pack for the weather?
A full layering system is essential — moisture-wicking base layers, a warm mid layer, insulated jacket, waterproof shell, and proper mountaineering boots. Sun protection and hydration systems are equally important.
5. What’s the weather like in Quito before my climb?
Quito’s climate is spring-like all year, with mild daytime temperatures around 20°C (68°F) and cooler evenings. Rain showers are common in the afternoons during the wetter months.
6. How does altitude affect the weather?
Every 1,000m (3,280ft) gain in altitude can drop the temperature by about 6°C (10°F). That’s why conditions can shift dramatically during a single day of trekking or climbing.
7. Can I climb during the rainy season?
Yes — it’s possible with flexibility. Many climbs in November to February still enjoy calm early-morning summit conditions before afternoon rain develops.
8. Why do climbs start at midnight?
Starting before sunrise ensures the snowpack is firm, wind is lower, and visibility is best for a safe summit push. Afternoon weather is less stable at high altitude.
Cotopaxi Weather
Cotopaxi, Ecuador, experiences a subtropical highland climate with distinct wet and dry seasons. Above 16,000 feet (4,900m) it can snow on any given day. Rainfall is the primary precipitation below 16,000 feet (4,900m) peaking during the wet season. Hail occasionally occurs in heavy storms but you can encounter rain and snow while climbing Cotopaxi.
Rainfall Patterns
The dry season spans June to September, with minimal rain—often less than 1 inch per month and few rainy days, ideal for clear skies and outdoor activities.
The wet season runs from October to May, bringing frequent afternoon showers; March and April are rainiest, averaging 5-7 inches monthly and up to 16 rainy days. Annual precipitation totals around 40-45 inches, with mornings often sunny before afternoon downpours.
Snowfall Absence
Snowfall does not occur near Quito, as temperatures rarely drop below freezing, staying between 48-72°F year-round. Higher Andean peaks like Imbabura or Chimborazo (over 100 miles away) may see snow, but Quito’s urban area and surroundings remain snow-free. Occasional hail mimics light snow visually during intense rain but melts quickly.
Summit Start Time
Around midnight to take advantage of calm, clear morning conditions. The summit night on Cotopaxi is challenging and requires excellent physical preparation and more importantly precise acclimatization. On this page we will cover important items you need to consider about climbing Cotopaxi and how to approach the summit night.
This post will also cover the need to know elements for a successful Cotopaxi climb and timeline on how we manage our Cotopaxi climbs. Check out all our upcoming trips.
Who Should Attempt Cotopaxi
Cotopaxi is well suited to fit trekkers and climbers who train consistently and are comfortable spending long days on their feet at altitude. While the route is not technically difficult, the mountain rises to 19,347 feet, nearly (6,000 meters) where thin air, cold temperatures, and sustained uphill movement make the climb physically demanding.
Previous high-altitude experience above 14,000–16,000 feet is strongly recommended, as is a willingness to train properly with a focus on aerobic endurance, hill work, and controlled pacing. Climbers must also be prepared to travel roped on a glacier, use crampons and an ice axe, and move efficiently in the dark during an early-morning summit push.
Cotopaxi is best attempted by those with the right mindset — patient, disciplined, and respectful of the mountain and its conditions. Success depends not on speed or strength alone, but on acclimatization, steady pacing, and sound decision-making.
This is not a “walk-up” peak, and those unwilling to train, acclimatize, or adjust plans based on weather and health should think carefully before attempting it. Climbers who approach Cotopaxi with humility and choose an experienced guiding team significantly improve their chances of both a safe ascent and a successful summit.
Final Thoughts
Ecuador’s mountains deliver year-round adventure for trekkers and climbers — but the key to success is understanding and respecting the weather. With expert guides, proper gear, and flexible planning, you’ll be well-prepared for every condition the Andes can offer.