🏔️ The Ultimate Guide to Travel in the Andes: Moon Phases, Weather, Rains & Landslides
Traveling through the Andean highlands (the Sierra) is an incredible experience, but the mountain climate demands respect. From sudden rainstorms to shifting roads, navigating this terrain requires timing and preparation.
Current Lunar Phase
First Quarter
Arica, Región de Arica y Parinacota, Chile
Calculated locally by Celestial Web Development for 2026-09-19. Times use America/Santiago. Dawn/Dusk are astronomical twilight. Results may vary from other services due to calculation and horizon assumptions.
🌙 Moon Phases & Night Travel in the High Andes
Why do moon phases matter when traveling or trekking in the Andes?
Moon Phases & Night Travel in the High Andes
- Full Moon (Clear Night Navigation): High-altitude nights in the Andes are pitch black due to low light pollution. A full moon acts as a natural spotlight, making night trekking, stargazing, and navigating remote passes significantly safer and easier.
- New Moon (Extreme Stargazing & Dark Trailhead Moves): If you are an astrophotographer, the new moon offers unmatched views of the Milky Way, but bring heavy-duty headlamps—navigating remote mountain passes without ambient moonlight can be treacherous.
- Tidal/Atmospheric Influences: Local Andean cultures historically linked moon phases to weather shifts. While modern science focuses on solar heating for daily mountain rain cycles, full moon phases often coincide with clearer night skies following afternoon rain during shoulder seasons.
Lima, PE
3:22 PM
Sep 19, 2026
22
°C
few clouds
Humidity:
73 %
Pressure:
1011 hPa
Wind:
20 Km/h
Clouds:
22%
Wind Gust:
0 Km/h
Visibility:
10 km
Sunrise:
5:59 AM
Sunset:
6:04 PM
- Temperature
- Precipitation
- Rain Chance
- Wind
- Humidity
- Pressure
4:00 PM
22
°
/
22
°
0 mm
0%
15 Km/h
73%
1011 hPa
0 mm/h
7:00 PM
21
°
/
22
°
0 mm
0%
14 Km/h
76%
1012 hPa
0 mm/h
10:00 PM
21
°
/
21
°
0 mm
0%
13 Km/h
79%
1013 hPa
0 mm/h
1:00 AM
20
°
/
20
°
0 mm
0%
13 Km/h
83%
1014 hPa
0 mm/h
4:00 AM
20
°
/
20
°
0 mm
0%
10 Km/h
85%
1013 hPa
0 mm/h
7:00 AM
20
°
/
20
°
0 mm
0%
9 Km/h
83%
1014 hPa
0 mm/h
10:00 AM
21
°
/
21
°
0 mm
0%
11 Km/h
76%
1015 hPa
0 mm/h
1:00 PM
23
°
/
23
°
0 mm
0%
13 Km/h
70%
1014 hPa
0 mm/h
Santiago, CL
5:22 PM
Sep 19, 2026
16
°C
overcast clouds
Humidity:
79 %
Pressure:
1013 hPa
Wind:
19 Km/h
Clouds:
100%
Wind Gust:
0 Km/h
Visibility:
9.024 km
Sunrise:
7:36 AM
Sunset:
7:36 PM
- Temperature
- Precipitation
- Rain Chance
- Wind
- Humidity
- Pressure
6:00 PM
16
°
/
17
°
1 mm
100%
12 Km/h
79%
1013 hPa
0 mm/h
9:00 PM
15
°
/
16
°
1 mm
100%
13 Km/h
75%
1014 hPa
0 mm/h
12:00 AM
13
°
/
14
°
0.38 mm
38%
10 Km/h
88%
1014 hPa
0 mm/h
3:00 AM
12
°
/
12
°
1 mm
100%
5 Km/h
89%
1016 hPa
0 mm/h
6:00 AM
13
°
/
13
°
1 mm
100%
8 Km/h
83%
1017 hPa
0 mm/h
9:00 AM
14
°
/
14
°
1 mm
100%
5 Km/h
69%
1017 hPa
0 mm/h
12:00 PM
12
°
/
12
°
0.21 mm
21%
8 Km/h
54%
1018 hPa
0 mm/h
3:00 PM
17
°
/
17
°
0.43 mm
43%
12 Km/h
43%
1017 hPa
0 mm/h
La Paz, BO
4:22 PM
Sep 19, 2026
17
°C
broken clouds
Humidity:
13 %
Pressure:
1015 hPa
Wind:
22 Km/h
Clouds:
63%
Wind Gust:
0 Km/h
Visibility:
10 km
Sunrise:
6:24 AM
Sunset:
6:28 PM
- Temperature
- Precipitation
- Rain Chance
- Wind
- Humidity
- Pressure
5:00 PM
13
°
/
17
°
0.12 mm
12%
15 Km/h
13%
1014 hPa
0 mm/h
8:00 PM
7
°
/
14
°
0.03 mm
3%
13 Km/h
17%
1016 hPa
0 mm/h
11:00 PM
4
°
/
9
°
0 mm
0%
4 Km/h
23%
1021 hPa
0 mm/h
2:00 AM
3
°
/
3
°
0 mm
0%
7 Km/h
18%
1022 hPa
0 mm/h
5:00 AM
2
°
/
2
°
0 mm
0%
5 Km/h
23%
1022 hPa
0 mm/h
8:00 AM
6
°
/
6
°
0 mm
0%
6 Km/h
14%
1023 hPa
0 mm/h
11:00 AM
10
°
/
10
°
0 mm
0%
12 Km/h
12%
1021 hPa
0 mm/h
2:00 PM
13
°
/
13
°
0 mm
0%
16 Km/h
13%
1015 hPa
0 mm/h
Santa Cruz de la Sierra, BO
4:22 PM
Sep 19, 2026
32
°C
scattered clouds
Humidity:
51 %
Pressure:
1008 hPa
Wind:
28 Km/h
Clouds:
42%
Wind Gust:
50 Km/h
Visibility:
10 km
Sunrise:
6:04 AM
Sunset:
6:08 PM
- Temperature
- Precipitation
- Rain Chance
- Wind
- Humidity
- Pressure
5:00 PM
29
°
/
32
°
0 mm
0%
24 Km/h
51%
1006 hPa
0 mm/h
8:00 PM
27
°
/
30
°
0 mm
0%
25 Km/h
47%
1006 hPa
0 mm/h
11:00 PM
27
°
/
29
°
0 mm
0%
17 Km/h
46%
1007 hPa
0 mm/h
2:00 AM
26
°
/
26
°
0 mm
0%
28 Km/h
47%
1005 hPa
0 mm/h
5:00 AM
28
°
/
28
°
0 mm
0%
30 Km/h
47%
1004 hPa
0 mm/h
8:00 AM
31
°
/
31
°
0 mm
0%
31 Km/h
42%
1006 hPa
0 mm/h
11:00 AM
33
°
/
33
°
0 mm
0%
35 Km/h
32%
1005 hPa
0 mm/h
2:00 PM
35
°
/
35
°
0 mm
0%
34 Km/h
25%
1000 hPa
0 mm/h
🌧️ Rain Patterns & Microclimates
The Andes do not have standard, uniform seasons. Altitude, geography, and latitude dictate everything:
- Wet Season (November – March): Expect heavy afternoon downpours, thick mountain fog, and swollen rivers. February is typically the wettest month (e.g., the Inca Trail in Peru closes every February for maintenance).
- Dry Season (May – October): Clear, sunny days, but freezing temperatures at night, especially at altitudes above 3,500m (11,500 ft).
- Diurnal Weather Cycle: In the mountains, weather changes rapidly. Mornings are frequently clear and dry, while afternoons bring localized cloud cover, rain, hail, or snow at high passes. Always cross high-altitude passes early in the day!
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⚠️ Rainfall, Mudslides & Landslides (Derrumbes)
When heavy rains hit steep Andean slopes, landslides (derrumbes) and mudslides (huaicos) become major hazards on mountain highways and trekking routes.
Essential Landslide Safety Tips:
- Avoid Night Driving: Navigating winding mountain roads during heavy rain at night is extremely dangerous. Landslides often occur without warning, and fallen boulders on the road are impossible to spot in the dark.
- Monitor Road Closures: Roads like Peru’s Carretera Central or mountain passes in Colombia and Ecuador frequently experience blockages during peak wet months. Build buffer days into your itinerary.
- Trek with Guides: Saturated mountain soil makes trails slippery and prone to collapse. Stick to marked routes and travel with experienced local guides.
- Stay connected off the grid: Getting stuck behind a landslide in a remote pass often means zero cell signal. Carrying portable satellite internet like Starlink ensures you can check live road reports, contact emergency services, or message family even in dead zones.
Heavy rains on steep, unstable slopes cause frequent mudslides and road blockages across Ecuador, Peru, Bolivia, and Chile.
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