December is one of the cooler months of the year in Kollam, with average highs near 28.4°C and lows around 20.8°C (mean 24.6°C). It is one of the drier months, averaging 66 mm of rainfall and 81% relative humidity across the period.
December is one of the cooler months of the year in Kollam. Across 45 years of records, the warmest December in Kollam was 1986 — when the month averaged 26.6°C — while the coldest was 1992 at 23.2°C. Typical December days reach 28.4°C with nights near 20.8°C. The long-term December temperature trend is broadly flat.
December is one of the drier months in Kollam, averaging 66 mm of rainfall. The wettest December on record was 1987 with 265 mm, while the driest was 1995 at 0 mm.
Relative humidity in Kollam during December averages 81%. The most humid Decembers were 1997, 2015 and 2023 at 87%, and the least humid was 1984 at 69%.
December receives about 4.9 kWh/m²/day of solar energy in Kollam. The sunniest December was 2003 at 5.6 kWh/m²/day, and the cloudiest were 1993 and 1996 at 4.2.
Average wind speed in Kollam during December is 1.3 m/s. The windiest Decembers were 1992 and 2006 at 1.6 m/s, while the calmest were 1984 and 2010 at 1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 25.1°C | 24.1°C | 24.0°C | 24.9°C | 24.9°C | -0.2°C |
| Avg High | 29.3°C | 27.9°C | 27.9°C | 28.5°C | 28.3°C | -1°C |
| Avg Low | 20.9°C | 20.4°C | 20.2°C | 21.3°C | 21.5°C | +0.6°C |
| Avg Rain | 70 mm | 64 mm | 30 mm | 79 mm | 98 mm | +28 mm |
December temperatures in Kollam have stayed relatively stable across the record.
December has ranged from a record low of 15.5°C (2008) to a record high of 33.6°C (2016).
Rainfall in December is one of the drier months, averaging 66 mm, with a wettest year of 265 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.1°C per decade while lows rose 0.2°C per decade, narrowing the gap between day and night.
One of the best times to visit Kollam
December is one of the best times to visit Kollam. Expect days averaging 28.4°C and nights around 20.8°C (mean 24.6°C) — cooler than Kollam's yearly average — with moderate rainfall (66 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 27.9°C | 23.9°C | 19.9°C | 28.9°C | 17.1°C | 9 mm | 82% | 1.1 m/s | — |
| 2024 | 28.8°C | 25.6°C | 22.5°C | 30.2°C | 20.7°C | 118 mm | 85% | 1.1 m/s | 4.9 |
| 2023 | 28.3°C | 25.5°C | 22.6°C | 29.8°C | 19.9°C | 187 mm | 87% | 1.4 m/s | 4.9 |
| 2022 | 28.4°C | 25.1°C | 21.7°C | 29.6°C | 19.5°C | 95 mm | 84% | 1.1 m/s | 4.5 |
| 2021 | 28.2°C | 24.6°C | 20.9°C | 29.3°C | 18.0°C | 110 mm | 85% | 1.2 m/s | 5.4 |
| 2020 | 28.0°C | 24.7°C | 21.4°C | 29.1°C | 18.8°C | 69 mm | 85% | 1.3 m/s | 4.5 |
| 2019 | 28.5°C | 25.2°C | 21.9°C | 29.6°C | 20.6°C | 42 mm | 86% | 1.4 m/s | 4.8 |
| 2018 | 28.8°C | 25.2°C | 21.6°C | 29.7°C | 19.8°C | 20 mm | 82% | 1.1 m/s | 4.8 |
| 2017 | 28.0°C | 24.5°C | 21.0°C | 28.9°C | 16.9°C | 82 mm | 84% | 1.3 m/s | 5.1 |
| 2016 | 31.0°C | 26.3°C | 21.5°C | 33.6°C | 18.3°C | 25 mm | 73% | 1.2 m/s | 5 |
| 2015 | 27.8°C | 24.8°C | 21.8°C | 29.1°C | 18.3°C | 123 mm | 87% | 1.2 m/s | 4.7 |
| 2014 | 27.8°C | 24.7°C | 21.5°C | 28.9°C | 18.5°C | 70 mm | 85% | 1.3 m/s | 4.4 |
| 2013 | 28.0°C | 24.3°C | 20.5°C | 29.0°C | 17.9°C | 41 mm | 81% | 1.2 m/s | 5 |
| 2012 | 29.8°C | 25.7°C | 21.5°C | 31.4°C | 19.1°C | 39 mm | 77% | 1.3 m/s | 4.9 |
| 2011 | 28.1°C | 24.4°C | 20.7°C | 29.4°C | 17.8°C | 201 mm | 82% | 1.3 m/s | 4.8 |
| 2010 | 27.0°C | 24.1°C | 21.1°C | 28.7°C | 18.2°C | 147 mm | 86% | 1 m/s | 4.5 |
| 2009 | 28.3°C | 24.9°C | 21.5°C | 29.8°C | 18.0°C | 31 mm | 84% | 1.2 m/s | 4.9 |
| 2008 | 27.6°C | 23.8°C | 20.0°C | 29.1°C | 15.5°C | 20 mm | 83% | 1.2 m/s | 5.1 |
| 2007 | 27.4°C | 23.7°C | 20.1°C | 28.9°C | 16.3°C | 13 mm | 83% | 1.4 m/s | 4.9 |
| 2006 | 27.6°C | 23.6°C | 19.6°C | 29.0°C | 16.8°C | 2 mm | 83% | 1.6 m/s | 5.1 |
| 2005 | 27.5°C | 24.4°C | 21.3°C | 29.0°C | 17.4°C | 91 mm | 86% | 1.2 m/s | 4.9 |
| 2004 | 28.0°C | 23.8°C | 19.5°C | 29.2°C | 17.2°C | 13 mm | 82% | 1.4 m/s | 5.4 |
| 2003 | 28.2°C | 24.0°C | 19.7°C | 29.3°C | 16.9°C | 46 mm | 81% | 1.3 m/s | 5.6 |
| 2002 | 27.6°C | 23.8°C | 20.0°C | 29.1°C | 17.2°C | 3 mm | 81% | 1.2 m/s | 4.8 |
| 2001 | 27.7°C | 23.9°C | 20.2°C | 28.9°C | 16.8°C | 27 mm | 83% | 1.3 m/s | 5.4 |
| 2000 | 29.3°C | 24.5°C | 19.7°C | 32.0°C | 16.3°C | 55 mm | 74% | 1.1 m/s | 5.2 |
| 1999 | 27.8°C | 23.9°C | 20.1°C | 29.1°C | 17.2°C | 24 mm | 81% | 1.3 m/s | 5.4 |
| 1998 | 27.2°C | 24.1°C | 21.1°C | 29.4°C | 17.1°C | 154 mm | 86% | 1.1 m/s | 4.5 |
| 1997 | 28.2°C | 25.4°C | 22.6°C | 29.7°C | 19.5°C | 121 mm | 87% | 1.1 m/s | 4.4 |
| 1996 | 27.2°C | 23.7°C | 20.3°C | 28.5°C | 17.4°C | 124 mm | 84% | 1.1 m/s | 4.2 |
| 1995 | 28.6°C | 23.7°C | 18.9°C | 30.6°C | 17.4°C | 0 mm | 75% | 1.4 m/s | 5.4 |
| 1994 | 28.3°C | 23.8°C | 19.2°C | 30.4°C | 16.1°C | 18 mm | 78% | 1.4 m/s | 5.3 |
| 1993 | 27.4°C | 24.3°C | 21.1°C | 28.9°C | 18.2°C | 148 mm | 86% | 1.2 m/s | 4.2 |
| 1992 ❄️ | 27.1°C | 23.2°C | 19.2°C | 28.6°C | 15.9°C | 22 mm | 83% | 1.6 m/s | 5 |
| 1991 | 28.0°C | 24.0°C | 20.0°C | 30.5°C | 16.9°C | 15 mm | 80% | 1.3 m/s | 4.7 |
| 1990 | 29.1°C | 25.1°C | 21.0°C | 31.7°C | 18.5°C | 14 mm | 78% | 1.4 m/s | 4.8 |
| 1989 | 28.6°C | 24.4°C | 20.1°C | 30.8°C | 18.0°C | 19 mm | 79% | 1.5 m/s | 5.2 |
| 1988 | 29.2°C | 24.8°C | 20.4°C | 31.2°C | 17.6°C | 50 mm | 75% | 1.3 m/s | 5.1 |
| 1987 🌧️ | 27.5°C | 24.8°C | 22.1°C | 29.2°C | 17.9°C | 265 mm | 87% | 1.1 m/s | 4.7 |
| 1986 🔥 | 31.6°C | 26.6°C | 21.7°C | 33.4°C | 19.1°C | 16 mm | 71% | 1.1 m/s | 5 |
| 1985 | 29.3°C | 25.0°C | 20.7°C | 31.1°C | 17.7°C | 65 mm | 76% | 1.1 m/s | 4.8 |
| 1984 | 30.7°C | 25.4°C | 20.0°C | 32.7°C | 17.2°C | 11 mm | 69% | 1 m/s | 5.1 |
| 1983 | 29.2°C | 25.5°C | 21.7°C | 31.0°C | 19.7°C | 169 mm | 79% | 1.3 m/s | — |
| 1982 | 29.6°C | 25.2°C | 20.7°C | 31.9°C | 18.5°C | 20 mm | 74% | 1.5 m/s | — |
| 1981 | 27.6°C | 24.1°C | 20.6°C | 28.8°C | 17.9°C | 16 mm | 84% | 1.2 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 28.4°C with lows near 20.8°C (mean 24.6°C), based on 45 years of NASA POWER data.
December averages 66 mm of rainfall in Kollam, one of the drier months. The wettest on record was 265 mm in 1987.
The hottest December reached 33.6°C in 2016. The coldest dipped to 15.5°C in 2008.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have fallen by about 0.1°C — but days and nights have moved in opposite directions. Overnight lows rose from 20.7°C to 21.5°C while daytime highs eased from 29.3°C to 28.3°C, narrowing the gap between day and night.
December is one of the cooler months of the year in Kollam and one of the drier months, so plan for around 28.4°C daytime highs and 20.8°C at night.
Yes — December is the coldest month of the year in Kollam, averaging 24.6°C.
For December in Kollam, pack light layers you can adjust through the day, with typical highs of 28.4°C and lows of 20.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 81% — quite humid.
Average wind speed in December is 1.3 m/s. The windiest December on record averaged 1.6 m/s (1992).
The wettest December on record was 1987 with 265 mm. On average, December sees 66 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Kollam behaves each December, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for December specifically, along with year-by-year records and how the month has changed over the decades.
