Arin, Peru experiences average highs of 19°C (66°F) and lows of 12°C (54°F) throughout the year. Rainfall is frequent, averaging about 20 rainy days per month. Sunshine is abundant, averaging about 10 hours per day. Average highs have cooled by 0.7°C (1.3°F) across the available records.
Arin, Peru Weather & Climate 2026
Monthly climate averages for Arin, Peru. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Apr–Sep 
Wetter season: Jan–Dec At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
6.8/10
Best: June, July
UV Index
8
High
Temperature 19°C / 12°C
Feels Like 20°C / 11°C
Rainy Days 20
Rainfall 129 mm
Sunshine 10 h
Humidity 77%
Wind Speed 7 km/h
Dew Point 11°C
Snow Days 1 days
Hottest Month
20°C
October
Avg Low12°C
Rain26days
Coldest Month
10°C
July
Avg High20°C
Rain5days
Driest Month
5days
June
Avg High19°C
Avg Low11°C
Windiest Month
8 km/h
September (Gusts 33)
Worst Time to Visit
Consider avoiding February, October, November, December due to heavy rainfall.
Sun Position
Sunrise 06:10
Daylight 11.3h
Sunset 17:30
Live conditions—
Arin on the map · live conditions
Arin, Peru
- Continent
- Americas
- Country
- Peru
- City
- Arin
- Population
- 687
- Coordinates
- -13.31°, -72.01°
Seasonal Breakdown
Spring
Sep–Nov
Avg High 20°C
Avg Low 12°C
Rain 24 days/mo
Summer
Dec–Feb
Avg High 19°C
Avg Low 12°C
Rain 29 days/mo
Autumn
Mar–May
Avg High 19°C
Avg Low 12°C
Rain 21 days/mo
Winter
Jun–Aug
Avg High 19°C
Avg Low 10°C
Rain 7 days/mo
2/3 best months
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 19°C / 12°C . Feb: 19°C / 13°C . Mar: 19°C / 12°C . Apr: 19°C / 12°C . May: 19°C / 11°C . Jun: 19°C / 11°C . Jul: 20°C / 10°C . Aug: 20°C / 10°C . Sep: 20°C / 11°C . Oct: 20°C / 12°C . Nov: 20°C / 13°C . Dec: 20°C / 12°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 237 mm. Feb: 240 mm. Mar: 209 mm. Apr: 109 mm. May: 52 mm. Jun: 19 mm. Jul: 21 mm. Aug: 35 mm. Sep: 70 mm. Oct: 141 mm. Nov: 172 mm. Dec: 248 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 84%. Feb: 86%. Mar: 85%. Apr: 82%. May: 77%. Jun: 70%. Jul: 66%. Aug: 67%. Sep: 72%. Oct: 77%. Nov: 79%. Dec: 83%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 7 km/h . Feb: 7 km/h . Mar: 7 km/h . Apr: 6 km/h . May: 6 km/h . Jun: 7 km/h . Jul: 8 km/h . Aug: 8 km/h . Sep: 8 km/h . Oct: 8 km/h . Nov: 7 km/h . Dec: 7 km/h .
Sunshine
Sunshine
Sunshine: Jan: 9h. Feb: 8h. Mar: 9h. Apr: 10h. May: 10h. Jun: 10h. Jul: 10h. Aug: 10h. Sep: 11h. Oct: 10h. Nov: 10h. Dec: 9h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 8. Feb: UV 8. Mar: UV 7. Apr: UV 8. May: UV 7. Jun: UV 7. Jul: UV 8. Aug: UV 8. Sep: UV 9. Oct: UV 9. Nov: UV 9. Dec: UV 8.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Snow Days
Snow DaysSnowfall
Snow Days: Jan: 2 days. Feb: 1 days. Mar: 2 days. Apr: 1 days. May: 0 days. Jun: 0 days. Jul: 1 days. Aug: 1 days. Sep: 0 days. Oct: 1 days. Nov: 1 days. Dec: 2 days.
Climate Trends
Average highs have cooled by 0.7°C (1.3°F) across the available records. Average rainfall has remained broadly steady.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Dec 2025 · 20°C | Oct · 20°C |
| Coldest month | Jul 2025 · 9°C | Jul · 10°C |
| Wettest month | Dec 2025 · 272 mm | Dec · 248 mm |
| Windiest month | Sep 2025 · 9 km/h | Sep · 8 km/h |
Month-by-Month Weather Table
January
Wet 
February
Wet March
Wet April
Wet May
Good June best
Excellent July best
Excellent August
Good September
Wet October
Wet November
Wet December
Wet | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 19°C / 12°C | 21°C / 12°C | 29days (237 mm) Wet | 9h Good | 84% Humid | 7.6 Very High | Wet | View Details |
| February | 19°C / 13°C | 21°C / 13°C | 28days (240 mm) Wet | 8.2h Good | 86% Very Muggy | 7.6 Very High | Wet | View Details |
| March | 19°C / 12°C | 20°C / 12°C | 28days (209 mm) Wet | 8.8h Good | 85% Humid | 6.8 High | Wet | View Details |
| April | 19°C / 12°C | 20°C / 12°C | 21days (109 mm) Wet | 9.7h Good | 82% Humid | 7.5 Very High | Wet | View Details |
| May | 19°C / 11°C | 19°C / 11°C | 13days (52 mm) Wet | 10.1h Excellent | 77% Humid | 7.3 Very High | Good | View Details |
| June best | 19°C / 11°C | 18°C / 10°C | 5days (19 mm) Good | 10h Excellent | 70% Muggy | 7 High | Excellent | View Details |
| July best | 20°C / 10°C | 18°C / 9°C | 5days (21 mm) Good | 10h Excellent | 66% Muggy | 7.6 Very High | Excellent | View Details |
| August | 20°C / 10°C | 19°C / 10°C | 11days (35 mm) Wet | 10.4h Excellent | 67% Muggy | 8.4 Very High | Good | View Details |
| September | 20°C / 11°C | 20°C / 11°C | 19days (70 mm) Wet | 10.6h Excellent | 72% Muggy | 8.7 Very High | Wet | View Details |
| October | 20°C / 12°C | 21°C / 12°C | 26days (141 mm) Wet | 10.2h Excellent | 77% Humid | 8.8 Very High | Wet | View Details |
| November | 20°C / 13°C | 21°C / 13°C | 27days (172 mm) Wet | 9.5h Good | 79% Humid | 8.5 Very High | Wet | View Details |
| December | 20°C / 12°C | 21°C / 13°C | 29days (248 mm) Wet | 9h Good | 83% Humid | 8.2 Very High | Wet | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Arin are June, July, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Arin, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Arin is October, with average daytime highs of 20°C (68°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Arin is July, with average overnight lows of 10°C (50°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Arin is December, averaging 248mm of precipitation across 29 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Arin runs through January, December, February, March, with the heaviest rainfall in January. Based on 10-year averages for Arin.
Arin receives approximately 116 sunshine hours per year. The sunniest month is September with around 11 hours. Based on climate data for Arin.
The least favorable months to visit Arin are February, October, November, December, primarily due to heavy rainfall. For the best conditions, consider June, July instead.
The annual average UV index in Arin is 8, classified as high. SPF 30+ sunscreen, sunglasses, and seeking shade between 10:00–16:00 are strongly recommended.
Average humidity in Arin is 77%, classified as humid. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes, Arin receives snow. Months with snowfall average 1 snow days and 2 cm (1 in) of accumulation, with about 0 frost days during winter.
Average wind speeds in Arin are 7 km/h (4 mph). The windiest month is September with peak winds reaching 8 km/h (5 mph) (gusts up to 33 km/h / 21 mph).
Arin averages 2 clear-sky days per month with overall cloud cover around 74%. The clearest skies occur in July.
The annual average dew point in Arin is 11°C (52°F), which feels pleasant with low humidity. Outdoor activities are comfortable year-round from a humidity standpoint.
Arin has a Subtropical Highland climate, classified as Cwb under the Köppen system. Temperate climates have mild winters and warm summers, with rainfall spread across the year and four distinct seasons.
The 'feels like' temperature in Arin ranges from 11°C (52°F) to 20°C (68°F) on average. The 'feels like' temperature closely matches the actual temperature throughout most of the year.
Yes, June is a great time to visit Arin. It earns a climate score of 7.9/10 with Excellent.
For June in Arin, pack Warm evening layer, Comfortable walking shoes. With average highs of 19°C (66°F) and 5 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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