Climate averages 1991–2020
Newport weather
in December.
A cold, moderately wet month: the 11th warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a cold month in Newport: daytime highs average 7.9°C and nights cool to about 3.1°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 86 mm of rain on roughly 13 days, which makes December a moderately wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 7 h 55 min on an average December day.
The nearest other city in this atlas is Cardiff (17 km away). In December its highs average 7.9°C, about as warm as Newport, with 107 mm of rain.
Among the 143 cities listed in the United Kingdom, Newport ranks joint 14th of 143 for the warmest December highs and 112th of 143 for the driest December (rainfall, lowest first). The mean December high of those 143 cities is 7.2°C; Newport is 0.7°C warmer than that mean.
From December to January, average highs fall by 0.3°C to 7.6°C, and monthly rainfall falls from 86 mm to 77 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
Newport climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 7.6°C2.7°C | 2.7°C | 77 | 13.4 | 8.48 h |
| February | 8.1°C2.4°C | 2.4°C | 61 | 10.7 | 9.910 h |
| March | 10.2°C3.4°C | 3.4°C | 60 | 10.9 | 11.812 h |
| April | 12.9°C5.0°C | 5.0°C | 64 | 11.1 | 13.814 h |
| May | 16.0°C8.2°C | 8.2°C | 68 | 11.8 | 15.616 h |
| June | 18.6°C11.1°C | 11.1°C | 64 | 10.5 | 16.617 h |
| July | 20.4°C13.0°C | 13.0°C | 63 | 11.1 | 16.116 h |
| August | 20.1°C13.0°C | 13.0°C | 74 | 11.3 | 14.615 h |
| September | 17.8°C10.9°C | 10.9°C | 63 | 10.1 | 12.713 h |
| October | 14.1°C8.4°C | 8.4°C | 88 | 13.1 | 10.711 h |
| November | 10.5°C5.3°C | 5.3°C | 84 | 13.7 | 8.99 h |
| December, selected | 7.9°C3.1°C | 3.1°C | 86 | 13.1 | 7.98 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
- Cardiff in DecemberUnited Kingdom · 17 kmHigh 7.9°C · Low 3.9°C · 107 mm rain
- Weston-super-Mare in DecemberUnited Kingdom · 27 kmHigh 8.3°C · Low 4.0°C · 80 mm rain
- Bristol in DecemberUnited Kingdom · 31 kmHigh 7.8°C · Low 3.2°C · 73 mm rain
- Bath in DecemberUnited Kingdom · 50 kmHigh 7.5°C · Low 2.8°C · 72 mm rain
- Gloucester, United Kingdom in DecemberUnited Kingdom · 61 kmHigh 7.6°C · Low 2.8°C · 66 mm rain
- Swansea in DecemberUnited Kingdom · 65 kmHigh 8.2°C · Low 4.7°C · 145 mm rain
- Cheltenham in DecemberUnited Kingdom · 72 kmHigh 7.5°C · Low 2.7°C · 62 mm rain
- Swindon in DecemberUnited Kingdom · 84 kmHigh 7.1°C · Low 2.4°C · 65 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 Newport) is explained once on the Newport year overview and on the Sources, method and limits page.