December is one of the cooler months of the year in Patan, with average highs near 30°C and lows around 13.3°C (mean 21.7°C). It is one of the drier months, averaging 1 mm of rainfall and 31% relative humidity across the period.
December is one of the cooler months of the year in Patan. Across 45 years of records, the warmest December in Patan was 2008 — when the month averaged 23.9°C — while the coldest was 2024 at 19.3°C. Typical December days reach 30°C with nights near 13.3°C. The long-term trend is cooling, about 0.3°C per decade.
December is one of the drier months in Patan, averaging 1 mm of rainfall. The wettest December on record was 1986 with 10 mm, while the driest were 2016, 2018 and 2022, among others at 0 mm.
Relative humidity in Patan during December averages 31%. The most humid December was 2019 at 57%, and the least humid was 1999 at 15%.
December receives about 4.3 kWh/m²/day of solar energy in Patan. The sunniest December was 1984 at 4.7 kWh/m²/day, and the cloudiest were 2017 and 2021 at 3.7.
Average wind speed in Patan during December is 1.9 m/s. The windiest December was 1997 at 2.5 m/s, while the calmest was 2025 at 1.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 21.6°C | 22.2°C | 22.3°C | 21.1°C | 20.7°C | -0.9°C |
| Avg High | 30.1°C | 30.8°C | 30.6°C | 29.4°C | 28.6°C | -1.5°C |
| Avg Low | 13.0°C | 13.7°C | 14.1°C | 12.9°C | 12.9°C | -0.1°C |
| Avg Rain | 2 mm | 0 mm | 2 mm | 1 mm | 1 mm | -1 mm |
December temperatures in Patan have fallen by about 0.7°C between 1981–1985 and 2021–2025.
December has ranged from a record low of 4.5°C (1994) to a record high of 35.2°C (2015).
Rainfall in December is one of the drier months, averaging 1 mm, with a wettest year of 10 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.4°C per decade while lows fell 0.1°C per decade, narrowing the gap between day and night.
One of the best times to visit Patan
December is one of the best times to visit Patan. Expect days averaging 30°C and nights around 13.3°C (mean 21.7°C) — cooler than Patan's yearly average — with low rainfall (1 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 | 29.3°C | 21.3°C | 13.3°C | 31.6°C | 12.0°C | 1 mm | 49% | 1.5 m/s | — |
| 2024 ❄️ | 27.7°C | 19.3°C | 10.9°C | 31.9°C | 7.4°C | 1 mm | 45% | 1.8 m/s | 4 |
| 2023 | 28.5°C | 21.2°C | 13.8°C | 30.4°C | 11.6°C | 1 mm | 51% | 1.8 m/s | 3.9 |
| 2022 | 29.9°C | 21.7°C | 13.6°C | 32.7°C | 9.4°C | 0 mm | 41% | 1.7 m/s | 4.3 |
| 2021 | 27.5°C | 20.3°C | 13.1°C | 30.3°C | 7.6°C | 4 mm | 49% | 1.7 m/s | 3.7 |
| 2020 | 28.6°C | 20.6°C | 12.5°C | 32.5°C | 5.6°C | 1 mm | 47% | 1.7 m/s | 4.2 |
| 2019 | 26.7°C | 19.4°C | 12.2°C | 29.5°C | 7.1°C | 1 mm | 57% | 2 m/s | 3.9 |
| 2018 | 29.1°C | 20.6°C | 12.2°C | 31.7°C | 8.6°C | 0 mm | 24% | 1.9 m/s | 4.3 |
| 2017 | 29.4°C | 21.7°C | 13.9°C | 32.0°C | 9.5°C | 7 mm | 37% | 1.9 m/s | 3.7 |
| 2016 | 32.0°C | 23.3°C | 14.6°C | 33.9°C | 11.8°C | 0 mm | 29% | 1.6 m/s | 4.6 |
| 2015 | 30.7°C | 21.6°C | 12.6°C | 35.2°C | 9.2°C | 0 mm | 19% | 1.8 m/s | 4.5 |
| 2014 | 29.6°C | 21.1°C | 12.5°C | 33.4°C | 8.7°C | 1 mm | 25% | 1.9 m/s | 4.3 |
| 2013 | 28.4°C | 20.3°C | 12.3°C | 31.3°C | 6.3°C | 0 mm | 38% | 1.7 m/s | 4.3 |
| 2012 | 30.7°C | 22.4°C | 14.0°C | 33.5°C | 10.4°C | 0 mm | 34% | 2.2 m/s | 4.4 |
| 2011 | 29.7°C | 21.3°C | 13.0°C | 33.8°C | 9.4°C | 0 mm | 36% | 1.8 m/s | 4.4 |
| 2010 | 27.3°C | 19.5°C | 11.7°C | 29.9°C | 8.7°C | 1 mm | 51% | 1.6 m/s | 4.4 |
| 2009 | 30.3°C | 22.4°C | 14.4°C | 32.7°C | 11.5°C | 0 mm | 30% | 1.9 m/s | 4.2 |
| 2008 🔥 | 31.2°C | 23.9°C | 16.7°C | 35.0°C | 12.3°C | 7 mm | 35% | 2 m/s | 4.1 |
| 2007 | 29.5°C | 21.3°C | 13.1°C | 33.1°C | 8.0°C | 2 mm | 29% | 2.1 m/s | 4.2 |
| 2006 | 28.9°C | 20.9°C | 13.0°C | 31.6°C | 9.4°C | 1 mm | 45% | 1.9 m/s | 4.3 |
| 2005 | 29.8°C | 20.9°C | 11.9°C | 32.2°C | 8.9°C | 0 mm | 24% | 1.8 m/s | 4.4 |
| 2004 | 31.1°C | 23.2°C | 15.3°C | 34.3°C | 11.5°C | 0 mm | 27% | 1.9 m/s | 4.2 |
| 2003 | 29.8°C | 21.2°C | 12.7°C | 34.3°C | 8.6°C | 3 mm | 27% | 2 m/s | 4.5 |
| 2002 | 31.1°C | 23.0°C | 14.9°C | 34.7°C | 11.4°C | 2 mm | 26% | 1.9 m/s | 4.5 |
| 2001 | 31.9°C | 23.2°C | 14.6°C | 34.8°C | 11.2°C | 3 mm | 20% | 1.8 m/s | 4.6 |
| 2000 | 32.5°C | 23.2°C | 14.0°C | 34.9°C | 11.8°C | 1 mm | 17% | 1.8 m/s | 4.6 |
| 1999 | 31.5°C | 22.4°C | 13.3°C | 34.5°C | 10.9°C | 0 mm | 15% | 1.9 m/s | 4.6 |
| 1998 | 31.9°C | 22.8°C | 13.7°C | 33.7°C | 11.5°C | 0 mm | 21% | 1.8 m/s | 4.5 |
| 1997 | 28.5°C | 20.7°C | 12.9°C | 31.3°C | 9.1°C | 0 mm | 37% | 2.5 m/s | 4.3 |
| 1996 | 31.4°C | 22.1°C | 12.8°C | 32.9°C | 9.8°C | 0 mm | 18% | 1.9 m/s | 4.5 |
| 1995 | 31.1°C | 23.1°C | 15.0°C | 33.1°C | 11.5°C | 2 mm | 29% | 2.1 m/s | 4.4 |
| 1994 | 28.8°C | 20.2°C | 11.6°C | 31.5°C | 4.5°C | 0 mm | 33% | 1.7 m/s | 4.6 |
| 1993 | 31.9°C | 22.8°C | 13.8°C | 34.3°C | 11.3°C | 0 mm | 17% | 2 m/s | 4.6 |
| 1992 | 32.0°C | 23.5°C | 15.0°C | 33.4°C | 12.3°C | 0 mm | 25% | 1.8 m/s | 4.6 |
| 1991 | 30.9°C | 22.5°C | 14.2°C | 34.5°C | 9.9°C | 0 mm | 24% | 1.8 m/s | 4.4 |
| 1990 | 30.2°C | 22.3°C | 14.3°C | 34.3°C | 4.9°C | 0 mm | 30% | 1.8 m/s | 4.5 |
| 1989 | 30.1°C | 21.8°C | 13.5°C | 33.5°C | 8.3°C | 0 mm | 25% | 2 m/s | 4.5 |
| 1988 | 31.2°C | 22.9°C | 14.5°C | 34.1°C | 10.5°C | 0 mm | 23% | 1.8 m/s | 4.5 |
| 1987 | 31.3°C | 22.4°C | 13.5°C | 33.7°C | 10.3°C | 7 mm | 24% | 1.8 m/s | 4.2 |
| 1986 🌧️ | 28.8°C | 19.6°C | 10.3°C | 34.5°C | 5.1°C | 10 mm | 20% | 2.3 m/s | 4.5 |
| 1985 | 30.3°C | 21.9°C | 13.6°C | 33.2°C | 8.6°C | 0 mm | 27% | 2 m/s | 4.3 |
| 1984 | 31.0°C | 22.2°C | 13.4°C | 34.2°C | 8.2°C | 0 mm | 18% | 2.1 m/s | 4.7 |
| 1983 | 28.9°C | 20.3°C | 11.7°C | 32.2°C | 5.2°C | 0 mm | 26% | 2.1 m/s | — |
| 1982 | 30.9°C | 22.4°C | 14.0°C | 33.6°C | 10.5°C | 0 mm | 29% | 2 m/s | — |
| 1981 | 28.8°C | 20.7°C | 12.6°C | 30.2°C | 10.1°C | 0 mm | 45% | 1.7 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 30°C with lows near 13.3°C (mean 21.7°C), based on 45 years of NASA POWER data.
December averages 1 mm of rainfall in Patan, one of the drier months. The wettest on record was 10 mm in 1986.
The hottest December reached 35.2°C in 2015. The coldest dipped to 4.5°C in 1994.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have fallen by about 0.7°C. Daytime highs moved from 30°C to 28.6°C and overnight lows from 13.1°C to 12.9°C over the same span.
December is one of the cooler months of the year in Patan and one of the drier months, so plan for around 30°C daytime highs and 13.3°C at night.
Not quite — December is the 2nd coolest month in Patan, averaging 21.7°C.
For December in Patan, pack light, breathable clothing and sun protection, with typical highs of 30°C and lows of 13.3°C.
Relative humidity in December averages 31% — relatively dry.
Average wind speed in December is 1.9 m/s. The windiest December on record averaged 2.5 m/s (1997).
The wettest December on record was 1986 with 10 mm. On average, December sees 1 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 Patan 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.
