The Frontier Gazette & Almanack
“Fair Warning for Every Town Under the Sky” · Est. 1881
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Cosmópolis Weather in December

Cosmópolis in December

The short of it: Cosmópolis in December averages a high of 29 °C (84 °F) and a low of 18 °C (65 °F), with 174 mm (6.9 in) of rain and about 13 h 31 min of daylight. Rated 3 of 5 for a visit; the best months are June and July. Source: TerraClimate climate normals, 1991–2020.

Average high 29° · low 18° · rain 174 mm · daylight 13 h 31 min

✦✦✦ Fair for a visit · best months: June & July

Thirty years of records give Cosmópolis an average December high of 29°, a low of 18° and some 174 mm of rain. The height of summer in Cosmópolis, with afternoons near 29°. Wet spells are common — about 174 mm, the 3rd wettest month.

The sun is up for about 13 h 31 min in mid-December, 17 minutes more than a month before.

For the traveller: pack linen, a wide hat and water, and an oilskin besides. The Almanac rates December 3 of 5 for a visit; the finest months here are June and July.

Against its neighbours, Cosmópolis runs cooler than most and wetter than most in December. Artur Nogueira, 8 km to the NNE, sees much the same highs.

December in Cosmópolis, by the numbers

Warmth rank
1st warmest of 12
Rain rank
3rd wettest of 12
Versus November
1° warmer, 38 mm more rain
Versus January
1° warmer
Day–night spread
10°
Snow season
seldom any
Daylight, mid-month
13 h 31 min
Average wind
8 km/h

Neighbouring Towns

December averages · distance by the crow’s flight
TownDistanceHighLowRain
Artur NogueiraSão Paulo8 km NNE29°18°177 mm
PaulíniaSão Paulo14 km SSE29°18°174 mm
AmericanaSão Paulo17 km SW29°19°174 mm
Nova OdessaSão Paulo18 km SW29°19°172 mm
SumaréSão Paulo21 km SSW29°19°172 mm
JaguariúnaSão Paulo23 km ESE29°18°176 mm
LimeiraSão Paulo23 km WNW29°18°182 mm
HortolândiaSão Paulo24 km S29°18°170 mm

The Almanac · Cosmópolis Month by Month

Climate normals 1991–2020 · pick a month
PrecipitationAverage highAverage low
Fair
The Almanac Speaks
December
✦✦✦✦✦

The height of summer in Cosmópolis, with afternoons near 29°. Wet spells are common — about 174 mm, the 3rd wettest month.

Climate of Cosmópolis by month
MonthHighLowRainWindDaylightVisit
January28°19°271 mm6 km/h13 h 23 min✦✦✦
February28°19°216 mm6 km/h12 h 53 min✦✦✦
March28°18°138 mm6 km/h12 h 17 min✦✦✦
April27°16°42 mm6 km/h11 h 36 min✦✦✦✦✦
May25°13°32 mm6 km/h11 h 2 min✦✦✦✦✦
June24°12°30 mm5 km/h10 h 45 min✦✦✦✦✦
July24°11°22 mm6 km/h10 h 52 min✦✦✦✦✦
August26°12°20 mm7 km/h11 h 20 min✦✦✦✦✦
September27°15°39 mm8 km/h12 h 0 min✦✦✦✦✦
October28°17°99 mm8 km/h12 h 40 min✦✦✦
November28°17°136 mm8 km/h13 h 14 min✦✦✦
December29°18°174 mm8 km/h13 h 31 min✦✦✦

Questions Readers Ask about Cosmópolis in December

Answered from the wire & the Almanac

What is the weather like in Cosmópolis in December?

Days average 29 °C (84 °F) and nights 18 °C (65 °F), with about 174 mm (6.9 in) of rain over the month. The height of summer in Cosmópolis, with afternoons near 29°. Wet spells are common — about 174 mm, the 3rd wettest month.

Is December a good time to visit Cosmópolis?

The Almanac gives December 3 of 5 (fair). The best months are June and July.

How long are the days in Cosmópolis in December?

In mid-December the sun is up for about 13 h 31 min. These are the longest days of the year; the shortest, in June, last 10 h 45 min.

Does it snow in Cosmópolis in December?

Hardly — December nights average 18 °C (65 °F), above freezing.

What should I pack for Cosmópolis in December?

Linen, a wide hat, sun cream and water, plus a good raincoat — it is a wet month.

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The Editor’s Remark

“Weather is the only news that never grows stale. Each morning the sky writes its own front page, and we at Wanted Weather are but its telegraph operators.”— J. Whitmore, Editor
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