Climate averages 1991–2020
Shillong weather
in December.
A mild, fairly dry month: the 11th warmest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a mild month in Shillong: daytime highs average 16.9°C and nights cool to about 8.5°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 16 mm of rain on roughly 3 days, which makes December a fairly dry month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 10 h 35 min on an average December day.
The nearest other city in this atlas is Guwahati (70 km away). In December its highs average 24.0°C, 7.1°C warmer than Shillong, with 9.2 mm of rain.
Among the 692 cities listed in India, Shillong ranks 685th of 692 for the warmest December highs and joint 541st of 692 for the driest December (rainfall, lowest first). The mean December high of those 692 cities is 25.6°C; Shillong is 8.7°C cooler than that mean.
From December to January, average highs fall by 1.2°C to 15.7°C, and monthly rainfall rises from 16 mm to 22 mm.
The annual picture
December in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Shillong climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 15.7°C6.8°C | 6.8°C | 22 | 4.4 | 10.711 h |
| February | 17.6°C8.3°C | 8.3°C | 43 | 7.7 | 11.311 h |
| March | 20.6°C11.3°C | 11.3°C | 119 | 15.9 | 12.012 h |
| April | 22.0°C14.2°C | 14.2°C | 275 | 25.9 | 12.713 h |
| May | 22.8°C16.5°C | 16.5°C | 453 | 30.1 | 13.413 h |
| June | 23.5°C18.6°C | 18.6°C | 697 | 29.8 | 13.714 h |
| July | 23.5°C19.1°C | 19.1°C | 715 | 31.0 | 13.614 h |
| August | 23.5°C18.9°C | 18.9°C | 558 | 30.9 | 13.013 h |
| September | 23.0°C18.0°C | 18.0°C | 393 | 28.8 | 12.312 h |
| October | 21.7°C15.3°C | 15.3°C | 224 | 20.2 | 11.612 h |
| November | 19.3°C11.5°C | 11.5°C | 47 | 6.6 | 10.911 h |
| December, selected | 16.9°C8.5°C | 8.5°C | 16 | 2.6 | 10.611 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
December in nearby cities
- Guwahati in DecemberIndia · 70 kmHigh 24.0°C · Low 13.9°C · 9.2 mm rain
- Sunāmganj in DecemberBangladesh · 74 kmHigh 24.0°C · Low 12.3°C · 11 mm rain
- Sylhet in DecemberBangladesh · 74 kmHigh 24.7°C · Low 13.3°C · 12 mm rain
- Nagaon in DecemberIndia · 117 kmHigh 24.0°C · Low 14.8°C · 9.9 mm rain
- Silchar in DecemberIndia · 124 kmHigh 24.8°C · Low 13.4°C · 14 mm rain
- Netrakona in DecemberBangladesh · 139 kmHigh 25.1°C · Low 13.6°C · 8.9 mm rain
- Habiganj in DecemberBangladesh · 140 kmHigh 25.3°C · Low 14.3°C · 13 mm rain
- Tezpur in DecemberIndia · 150 kmHigh 23.3°C · Low 14.7°C · 7.7 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Shillong) is explained once on the Shillong year overview and on the Sources, method and limits page.