Arequipa records about 102mm of rain across roughly 16 wet days a year, which is a 4% chance on an average day. February is the wettest month at 22mm (22% of the annual total) and May the driest at 0mm. Local rain type: brief showers. Arequipa — the "White City" — enjoys 300+ sunny days per year. Rain falls only from December through March as brief afternoon showers.
Chance of rain on an average day: 4%
Rainfall climatology for Arequipa. The live hour-by-hour answer for today loads at the top of this page from Open-Meteo and refreshes through the day — the figures below describe a typical year, not today.
Last updated: · Live forecast data refreshes hourly.
| Annual rainfall | 102mm |
| Rain days per year | 16 |
| Odds on an average day | 4% |
| Wettest month | February — 22mm over 5 days |
| Driest month | May — 0mm over 0 days |
| Rain type | brief showers |
| Best dry window | April through November offers completely dry conditions. |
| Worst rain window | January and February bring brief afternoon showers. |
February delivers 2200% more rain than May (22mm vs 0mm). That gap is the difference between planning around showers and ignoring them.
22% of the year's rain falls in February alone, so Arequipa has a genuine wet season rather than evenly spread showers.
Arequipa rain typically comes as discrete showers, so a compact umbrella and a flexible plan are usually enough.
Rain falls on about 5 days in February against 0 in May — the frequency swing matters more for planning than the millimetre totals.
Climate normals. Use them to judge whether today's live forecast at the top of the page is typical or unusual for the season.
| Month | Rainfall | Rain days | Chance on a given day | Highs |
|---|---|---|---|---|
| January | 18mm | 4 | 13% | 22°C |
| February | 22mm | 5 | 17% | 22°C |
| March | 12mm | 3 | 10% | 22°C |
| April | 3mm | 1 | 3% | 22°C |
| May | 0mm | 0 | 0% | 21°C |
| June | 0mm | 0 | 0% | 21°C |
| July | 0mm | 0 | 0% | 21°C |
| August | 0mm | 0 | 0% | 21°C |
| September | 0mm | 0 | 0% | 21°C |
| October | 1mm | 1 | 3% | 21°C |
| November | 2mm | 1 | 3% | 22°C |
| December | 8mm | 2 | 7% | 22°C |
Rain probability is the chance that at least 0.2mm falls at your location — not how long it rains. For Arequipa we combine the hourly probability curve, expected volume in millimetres, and the city's own rainfall record into a single umbrella verdict.
| Factor | Weight | What it measures |
|---|---|---|
| Hourly probability | 40% | Peak and sustained chance of measurable rain across the next 24 hours. |
| Expected volume | 30% | Total millimetres, which separates a passing shower from a genuine soaking. |
| Timing & duration | 20% | When rain starts, when it eases, and the longest continuous dry window. |
| Local rain type | 10% | Drizzle, brief showers, thunderstorms or monsoon — each needs different gear. |
Live hourly values come from Open-Meteo and refresh through the day. Monthly rainfall figures are climate normals, so they describe a typical year rather than a forecast.
Arequipa records rain on roughly 16 days a year — about a 4% chance on any given day — totalling around 102mm.
February, with about 22mm over 5 rain days. That is 22% of the entire year's rainfall in a single month.
May is the driest month at 0mm across roughly 0 days. April through November offers completely dry conditions.
Arequipa — the "White City" — enjoys 300+ sunny days per year. Rain falls only from December through March as brief afternoon showers.
No. Probability is the chance that at least 0.2mm of rain falls at your location at some point in the period. Check the expected millimetres alongside it: 40% with 0.4mm is a passing shower, 40% with 12mm is a soaking.