December is one of the cooler months of the year in Sirmaur, with average highs near 20.8°C and lows around 8.6°C (mean 14.7°C). It is one of the drier months, averaging 11 mm of rainfall and 42% relative humidity across the period.
December is one of the cooler months of the year in Sirmaur. Across 45 years of records, the warmest December in Sirmaur was 2016 — when the month averaged 16.8°C — while the coldest was 1997 at 12.2°C. Typical December days reach 20.8°C with nights near 8.6°C. The long-term December temperature trend is broadly flat.
December is one of the drier months in Sirmaur, averaging 11 mm of rainfall. The wettest December on record was 1989 with 55 mm, while the driest were 1993, 1998 and 2025, among others at 0 mm.
Relative humidity in Sirmaur during December averages 42%. The most humid December was 1997 at 59%, and the least humid was 1987 at 17%.
December receives about 3.4 kWh/m²/day of solar energy in Sirmaur. The sunniest Decembers were 1998, 1999 and 2005 at 3.7 kWh/m²/day, and the cloudiest was 1997 at 2.9.
Average wind speed in Sirmaur during December is 1.5 m/s. The windiest December was 1984 at 1.8 m/s, while the calmest were 2019, 2021 and 2025, among others at 1.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 14.6°C | 14.6°C | 15.3°C | 14.5°C | 14.7°C | +0.1°C |
| Avg High | 20.8°C | 20.7°C | 21.6°C | 20.3°C | 20.3°C | -0.5°C |
| Avg Low | 8.4°C | 8.3°C | 8.9°C | 8.6°C | 9.0°C | +0.6°C |
| Avg Rain | 14 mm | 8 mm | 7 mm | 16 mm | 11 mm | -3 mm |
December temperatures in Sirmaur have stayed relatively stable across the record.
December has ranged from a record low of 0.6°C (2019) to a record high of 27.4°C (2014).
Rainfall in December is one of the drier months, averaging 11 mm, with a wettest year of 55 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.
A good time to visit Sirmaur
December is a good time to visit Sirmaur, with days averaging 20.8°C and nights around 8.6°C (mean 14.7°C, cooler than Sirmaur's yearly average) and low rainfall. October and March are marginally more temperate, but December still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 20.6°C | 15.0°C | 9.4°C | 24.0°C | 6.7°C | 0 mm | 50% | 1.3 m/s | — |
| 2024 | 20.0°C | 14.2°C | 8.5°C | 24.7°C | 5.0°C | 38 mm | 49% | 1.5 m/s | 3.3 |
| 2023 | 20.9°C | 15.2°C | 9.4°C | 23.4°C | 7.2°C | 3 mm | 52% | 1.4 m/s | 3.5 |
| 2022 | 20.7°C | 15.2°C | 9.6°C | 24.6°C | 5.6°C | 1 mm | 56% | 1.5 m/s | 3.5 |
| 2021 | 18.4°C | 13.3°C | 8.1°C | 22.7°C | 4.4°C | 10 mm | 56% | 1.3 m/s | 3.4 |
| 2020 | 21.5°C | 15.3°C | 9.1°C | 26.2°C | 4.5°C | 14 mm | 38% | 1.5 m/s | 3.6 |
| 2019 | 17.8°C | 12.3°C | 6.8°C | 22.4°C | 0.6°C | 35 mm | 50% | 1.3 m/s | 3.1 |
| 2018 | 18.8°C | 13.1°C | 7.4°C | 22.0°C | 2.3°C | 5 mm | 52% | 1.4 m/s | 3.6 |
| 2017 | 21.8°C | 15.8°C | 9.8°C | 26.3°C | 7.0°C | 21 mm | 45% | 1.5 m/s | 3.4 |
| 2016 🔥 | 23.5°C | 16.8°C | 10.1°C | 27.2°C | 5.5°C | 4 mm | 33% | 1.5 m/s | 3.6 |
| 2015 | 21.3°C | 15.3°C | 9.2°C | 26.0°C | 4.8°C | 12 mm | 42% | 1.6 m/s | 3.4 |
| 2014 | 20.9°C | 14.9°C | 8.8°C | 27.4°C | 5.5°C | 27 mm | 39% | 1.6 m/s | 3.3 |
| 2013 | 20.0°C | 14.4°C | 8.8°C | 24.2°C | 4.5°C | 7 mm | 50% | 1.5 m/s | 3.5 |
| 2012 | 20.1°C | 14.4°C | 8.7°C | 25.1°C | 6.0°C | 16 mm | 51% | 1.6 m/s | 3.2 |
| 2011 | 20.2°C | 14.3°C | 8.5°C | 24.3°C | 6.1°C | 7 mm | 46% | 1.4 m/s | 3.6 |
| 2010 | 18.7°C | 13.3°C | 7.9°C | 21.8°C | 3.8°C | 30 mm | 56% | 1.4 m/s | 3.5 |
| 2009 | 20.4°C | 14.6°C | 8.8°C | 23.1°C | 4.9°C | 0 mm | 40% | 1.4 m/s | 3.4 |
| 2008 | 22.6°C | 16.6°C | 10.5°C | 26.4°C | 6.4°C | 0 mm | 47% | 1.4 m/s | 3.5 |
| 2007 | 20.8°C | 14.6°C | 8.3°C | 26.1°C | 3.7°C | 4 mm | 39% | 1.6 m/s | 3.5 |
| 2006 | 21.2°C | 15.1°C | 9.1°C | 25.9°C | 5.4°C | 19 mm | 43% | 1.5 m/s | 3.2 |
| 2005 | 20.9°C | 14.5°C | 8.0°C | 24.2°C | 5.8°C | 0 mm | 37% | 1.5 m/s | 3.7 |
| 2004 | 22.0°C | 15.7°C | 9.4°C | 26.2°C | 4.1°C | 6 mm | 42% | 1.6 m/s | 3.4 |
| 2003 | 20.4°C | 14.5°C | 8.5°C | 24.5°C | 3.6°C | 18 mm | 51% | 1.5 m/s | 3.2 |
| 2002 | 21.9°C | 15.5°C | 9.0°C | 26.1°C | 3.5°C | 10 mm | 37% | 1.5 m/s | 3.5 |
| 2001 | 22.3°C | 15.7°C | 9.0°C | 26.2°C | 5.7°C | 9 mm | 36% | 1.6 m/s | 3.5 |
| 2000 | 23.7°C | 16.3°C | 8.8°C | 26.0°C | 4.3°C | 2 mm | 23% | 1.7 m/s | 3.6 |
| 1999 | 22.3°C | 15.4°C | 8.4°C | 26.0°C | 5.2°C | 1 mm | 25% | 1.5 m/s | 3.7 |
| 1998 | 20.5°C | 14.5°C | 8.4°C | 26.2°C | 5.7°C | 0 mm | 45% | 1.4 m/s | 3.7 |
| 1997 ❄️ | 17.1°C | 12.2°C | 7.3°C | 21.6°C | 4.7°C | 46 mm | 59% | 1.3 m/s | 2.9 |
| 1996 | 21.2°C | 14.6°C | 7.9°C | 23.3°C | 4.5°C | 0 mm | 36% | 1.5 m/s | 3.5 |
| 1995 | 21.0°C | 15.0°C | 8.9°C | 23.8°C | 5.9°C | 6 mm | 42% | 1.5 m/s | 3.2 |
| 1994 | 20.9°C | 14.6°C | 8.3°C | 24.0°C | 4.0°C | 3 mm | 40% | 1.6 m/s | 3.2 |
| 1993 | 22.0°C | 15.1°C | 8.2°C | 26.2°C | 4.5°C | 0 mm | 32% | 1.5 m/s | 3.2 |
| 1992 | 22.1°C | 15.5°C | 8.9°C | 24.2°C | 5.7°C | 0 mm | 36% | 1.6 m/s | 3.3 |
| 1991 | 20.2°C | 14.4°C | 8.5°C | 26.2°C | 3.5°C | 26 mm | 47% | 1.5 m/s | 3.1 |
| 1990 | 20.1°C | 14.4°C | 8.6°C | 23.6°C | 2.9°C | 2 mm | 42% | 1.6 m/s | 3.2 |
| 1989 🌧️ | 20.0°C | 14.2°C | 8.4°C | 23.3°C | 4.7°C | 55 mm | 40% | 1.5 m/s | 3.1 |
| 1988 | 20.6°C | 14.9°C | 9.1°C | 24.7°C | 6.0°C | 18 mm | 45% | 1.5 m/s | 3.1 |
| 1987 | 23.1°C | 16.3°C | 9.5°C | 26.2°C | 6.2°C | 4 mm | 17% | 1.5 m/s | 3.2 |
| 1986 | 20.1°C | 14.0°C | 8.0°C | 26.0°C | 4.1°C | 7 mm | 37% | 1.6 m/s | 3 |
| 1985 | 20.7°C | 14.5°C | 8.4°C | 24.0°C | 5.1°C | 23 mm | 50% | 1.6 m/s | 3.2 |
| 1984 | 21.2°C | 14.8°C | 8.4°C | 26.0°C | 4.7°C | 1 mm | 35% | 1.8 m/s | 3.1 |
| 1983 | 20.3°C | 14.1°C | 7.9°C | 24.4°C | 4.0°C | 4 mm | 33% | 1.5 m/s | — |
| 1982 | 21.6°C | 15.2°C | 8.9°C | 25.5°C | 3.6°C | 11 mm | 33% | 1.7 m/s | — |
| 1981 | 19.7°C | 13.3°C | 6.8°C | 22.3°C | 4.5°C | 2 mm | 41% | 1.4 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 20.8°C with lows near 8.6°C (mean 14.7°C), based on 45 years of NASA POWER data.
December averages 11 mm of rainfall in Sirmaur, one of the drier months. The wettest on record was 55 mm in 1989.
The hottest December reached 27.4°C in 2014. The coldest dipped to 0.6°C in 2019.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 0.2°C — but days and nights have moved in opposite directions. Overnight lows rose from 8.1°C to 9°C while daytime highs eased from 20.7°C to 20.1°C, narrowing the gap between day and night.
December is one of the cooler months of the year in Sirmaur and one of the drier months, so plan for around 20.8°C daytime highs and 8.6°C at night.
Not quite — December is the 2nd coolest month in Sirmaur, averaging 14.7°C.
For December in Sirmaur, pack light layers you can adjust through the day, with typical highs of 20.8°C and lows of 8.6°C.
Relative humidity in December averages 42% — relatively dry.
Average wind speed in December is 1.5 m/s. The windiest December on record averaged 1.8 m/s (1984).
The wettest December on record was 1989 with 55 mm. On average, December sees 11 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 Sirmaur 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.
