Castellar del Vallès Weather in December
Average highs run from 14°C on December 1 to 13°C on December 31, and lows from 6°C to 4°C. Normal precipitation for the month is 37 mm over about 6 wet days.
December day by day
The normal high and low for each date, and the record, in °C.
- Normal low
- Normal high
- Record high
- Record low
December at a glance
- Average high
- 13°C
- Average low
- 5°C
- Precipitation
- 37 mm
- Record high
- 22°CDec 31, 2022
- Record low
- -3°CDec 4, 2017
- Daylight
- 9 h 23 min to 9 h 13 min
- Cloud cover
- 65%
- Humidity
- 77%
- Dew point
- 4°C
- Wind
- 12.6 km/h
Every day of the month
A wet day has at least 1 mm of precipitation in the reanalysis.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Dec 1 | 14°C | 6°C | 19°C 2023 | 0°C 2017 | 21% |
| Dec 2 | 14°C | 6°C | 17°C 2018 | -2°C 2017 | 22% |
| Dec 3 | 14°C | 6°C | 18°C 2013 | -1°C 2017 | 21% |
| Dec 4 | 14°C | 6°C | 17°C 2018 | -3°C 2017 | 21% |
| Dec 5 | 14°C | 5°C | 19°C 2018 | -1°C 2017 | 20% |
| Dec 6 | 14°C | 5°C | 19°C 2016 | -2°C 2017 | 20% |
| Dec 7 | 14°C | 5°C | 19°C 2025 | 0°C 2013 | 19% |
| Dec 8 | 14°C | 5°C | 20°C 2025 | 1°C 2013 | 20% |
| Dec 9 | 13°C | 5°C | 18°C 2016 | 1°C 2017 | 20% |
| Dec 10 | 13°C | 5°C | 19°C 2023 | 0°C 2013 | 19% |
| Dec 11 | 13°C | 5°C | 19°C 2023 | 2°C 2018 | 18% |
| Dec 12 | 13°C | 5°C | 18°C 2023 | 2°C 2017 | 18% |
| Dec 13 | 13°C | 5°C | 19°C 2019 | 0°C 2017 | 17% |
| Dec 14 | 13°C | 5°C | 19°C 2022 | 0°C 2013 | 18% |
| Dec 15 | 13°C | 5°C | 18°C 2013 | 2°C 2021 | 18% |
| Dec 16 | 13°C | 5°C | 20°C 2015 | 0°C 2017 | 18% |
| Dec 17 | 13°C | 5°C | 20°C 2015 | -1°C 2017 | 18% |
| Dec 18 | 13°C | 5°C | 17°C 2015 | -1°C 2023 | 18% |
| Dec 19 | 13°C | 5°C | 18°C 2023 | -1°C 2017 | 18% |
| Dec 20 | 13°C | 5°C | 17°C 2019 | 1°C 2017 | 18% |
| Dec 21 | 13°C | 5°C | 18°C 2019 | 0°C 2021 | 18% |
| Dec 22 | 13°C | 4°C | 21°C 2023 | 1°C 2013 | 17% |
| Dec 23 | 13°C | 4°C | 21°C 2022 | 0°C 2014 | 16% |
| Dec 24 | 13°C | 4°C | 21°C 2022 | 0°C 2014 | 16% |
| Dec 25 | 13°C | 4°C | 21°C 2022 | 0°C 2023 | 15% |
| Dec 26 | 13°C | 4°C | 21°C 2022 | 0°C 2023 | 15% |
| Dec 27 | 13°C | 4°C | 19°C 2021 | 1°C 2020 | 14% |
| Dec 28 | 13°C | 4°C | 19°C 2021 | -1°C 2014 | 14% |
| Dec 29 | 13°C | 4°C | 19°C 2021 | -2°C 2014 | 13% |
| Dec 30 | 13°C | 4°C | 20°C 2021 | -1°C 2013 | 14% |
| Dec 31 | 13°C | 4°C | 22°C 2022 | -2°C 2014 | 14% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+1).
- December 1
- sunrise 7:59 AM, sunset 5:22 PM
- December 31
- sunrise 8:18 AM, sunset 5:31 PM
Other months
Sources
Records: NOAA GHCN-Daily, station SPE00156504, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine, and temperature and precipitation: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.