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

Sleman Weather in December

Sleman in December

The short of it: Sleman in December averages a high of 30 °C (86 °F) and a low of 23 °C (73 °F), with 366 mm (14.4 in) of rain and about 12 h 34 min of daylight. Rated 2 of 5 for a visit; the best months are July and August. Source: TerraClimate climate normals, 1991–2020.

Average high 30° · low 23° · rain 366 mm · daylight 12 h 34 min

✦✦ Travel with care for a visit · best months: July & August

Thirty years of records give Sleman an average December high of 30°, a low of 23° and some 366 mm of rain. Days run hot, near 30° in the afternoon; ride early and rest at noon. Wet spells are common — about 366 mm, the 2nd wettest month.

The sun is up for about 12 h 34 min in mid-December.

For the traveller: pack linen, a wide hat and water, and an oilskin besides. The Almanac rates December 2 of 5 for a visit; the finest months here are July and August.

Against its neighbours, Sleman runs cooler than most and wetter than most in December. Melati, 2 km to the SSE, sees much the same highs.

December in Sleman, by the numbers

Warmth rank
10th warmest of 12
Rain rank
2nd wettest of 12
Versus November
1° colder, 92 mm more rain
Versus January
about the same
Day–night spread
7°
Snow season
seldom any
Daylight, mid-month
12 h 34 min
Average wind
5 km/h

Neighbouring Towns

December averages · distance by the crow’s flight
TownDistanceHighLowRain
MelatiYogyakarta2 km SSE30°23°366 mm
GodeanYogyakarta9 km SW31°23°356 mm
Pugeran MaguwoharjoYogyakarta9 km SE31°23°344 mm
Gamping LorYogyakarta9 km SSW31°23°350 mm
YogyakartaYogyakarta10 km S31°24°350 mm
DepokYogyakarta10 km ESE31°23°344 mm
KasihanYogyakarta13 km SSW31°23°350 mm
Candi PrambananCentral Java16 km ESE30°23°335 mm

The Almanac · Sleman Month by Month

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

Days run hot, near 30° in the afternoon; ride early and rest at noon. Wet spells are common — about 366 mm, the 2nd wettest month.

Climate of Sleman by month
MonthHighLowRainWindDaylightVisit
January30°23°367 mm5 km/h12 h 31 min✦✦
February30°23°362 mm5 km/h12 h 22 min✦✦
March30°23°346 mm5 km/h12 h 10 min✦✦
April31°23°232 mm5 km/h11 h 57 min✦✦
May31°23°126 mm6 km/h11 h 46 min✦✦
June31°22°70 mm7 km/h11 h 41 min✦✦✦
July30°21°29 mm7 km/h11 h 43 min✦✦✦✦
August30°21°21 mm8 km/h11 h 52 min✦✦✦✦
September30°21°32 mm8 km/h12 h 4 min✦✦✦✦
October31°23°108 mm6 km/h12 h 17 min✦✦
November31°23°274 mm4 km/h12 h 29 min✦✦
December30°23°366 mm5 km/h12 h 34 min✦✦

Questions Readers Ask about Sleman in December

Answered from the wire & the Almanac

What is the weather like in Sleman in December?

Days average 30 °C (86 °F) and nights 23 °C (73 °F), with about 366 mm (14.4 in) of rain over the month. Days run hot, near 30° in the afternoon; ride early and rest at noon. Wet spells are common — about 366 mm, the 2nd wettest month.

Is December a good time to visit Sleman?

The Almanac gives December 2 of 5 (travel with care). The best months are July and August.

How long are the days in Sleman in December?

In mid-December the sun is up for about 12 h 34 min. These are the longest days of the year; the shortest, in June, last 11 h 41 min.

Does it snow in Sleman in December?

Hardly — December nights average 23 °C (73 °F), above freezing.

What should I pack for Sleman 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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