Weather in Manaus in October

A hard month. October asks something of you. Go in knowing what. You should expect rain on 17 days of the month, which is more days wet than dry.

October ranks 12 of 12 — near the bottom of Manaus's year. August is the month that works, and the swing between the two is 20 points, which is a different holiday rather than a slightly better one.

Rain on 17 days, 3 of them heavy. Enough to need a plan B, not enough to need a plan around it. Pack for 33.1 °C days and 26.2 °C nights; the spread matters more here than any single number.

What the averages hide

Averages flatten a month, and this one hides a few things: 8 days clear 35 °C, so a serious heatwave is normal rather than notable. Across the twenty years measured, the hottest October day reached 40.9 °C and the coldest night fell to 23.7 °C, and the wettest single day dropped 47 mm — roughly 46% of the month's rain in one day.

October is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest October on record still delivered 164 mm against 42 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 103 mm average is a reasonable planning figure, not a promise.

Wind is light at 2.3 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 72%.

How October sits in the year

Temperatures hold steady either side: 33.1 °C in September, 33.1 here, 31.8 in November. Nothing about the timing within the month matters much.

Daylight in October

Manaus sits close enough to the equator that daylight barely moves all year — 12.2 hours in October, against a range of just 0.4 hours across the whole calendar. Sunrise and sunset land at roughly the same time whenever you come.

An inland climate

Despite being inland, the year stays fairly even: 8.9 °C between the year's warmest afternoons and coldest nights.

How busy it gets

Off season. The genuine off season: cheapest by a distance, with the caveat that some tours and restaurants close entirely.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

October in Manaus versus nearby

If Manaus is one option among several, the nearby comparison is worth making. Belém is close enough to be a coin toss — within a degree on temperature, 1 day less rain. Cusco is a better bet in October — 14.7 °C cooler, 6 days less rain.

So: October is a compromise. August is 20 points better and is what Manaus is actually like at its best — worth moving the trip for if that is possible, and worth adjusting expectations for if it is not.

Every month in Manaus

See all twelve months in Manaus, or where else to go in October.