Climate averages 1991–2020
Southend-on-Sea weather
in December.
A cold, moderately wet month: the 10th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a cold month in Southend-on-Sea: daytime highs average 7.7°C and nights cool to about 4.0°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 74 mm of rain on roughly 13 days, which makes December a moderately wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 7 h 56 min on an average December day.
The nearest other city in this atlas is Basildon (18 km away). In December its highs average 7.7°C, about as warm as Southend-on-Sea, with 55 mm of rain.
Among the 143 cities listed in the United Kingdom, Southend-on-Sea ranks joint 23rd of 143 for the warmest December highs and joint 98th of 143 for the driest December (rainfall, lowest first). The mean December high of those 143 cities is 7.2°C; Southend-on-Sea is 0.5°C warmer than that mean.
From December to January, average highs fall by 0.5°C to 7.2°C, and monthly rainfall falls from 74 mm to 67 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
Southend-on-Sea climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 7.2°C3.3°C | 3.3°C | 67 | 13.3 | 8.48 h |
| February | 7.5°C3.1°C | 3.1°C | 55 | 10.9 | 9.910 h |
| March | 9.6°C4.4°C | 4.4°C | 46 | 10.2 | 11.812 h |
| April | 12.4°C6.3°C | 6.3°C | 47 | 10.0 | 13.814 h |
| May | 15.5°C9.3°C | 9.3°C | 53 | 9.5 | 15.616 h |
| June | 18.5°C12.2°C | 12.2°C | 55 | 9.8 | 16.617 h |
| July | 20.8°C14.4°C | 14.4°C | 56 | 11.0 | 16.116 h |
| August | 20.8°C14.6°C | 14.6°C | 63 | 10.2 | 14.615 h |
| September | 18.1°C12.5°C | 12.5°C | 56 | 10.3 | 12.713 h |
| October | 14.4°C9.8°C | 9.8°C | 72 | 12.3 | 10.711 h |
| November | 10.3°C6.3°C | 6.3°C | 71 | 12.4 | 8.99 h |
| December, selected | 7.7°C4.0°C | 4.0°C | 74 | 12.7 | 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
- Basildon in DecemberUnited Kingdom · 18 kmHigh 7.7°C · Low 3.7°C · 55 mm rain
- Gillingham in DecemberUnited Kingdom · 20 kmHigh 7.7°C · Low 3.5°C · 55 mm rain
- Chelmsford in DecemberUnited Kingdom · 28 kmHigh 7.6°C · Low 3.3°C · 54 mm rain
- Grays in DecemberUnited Kingdom · 28 kmHigh 7.8°C · Low 3.4°C · 56 mm rain
- Maidstone in DecemberUnited Kingdom · 33 kmHigh 7.9°C · Low 3.5°C · 62 mm rain
- Dagenham in DecemberUnited Kingdom · 38 kmHigh 7.7°C · Low 3.4°C · 56 mm rain
- Bexley in DecemberUnited Kingdom · 41 kmHigh 7.8°C · Low 3.3°C · 56 mm rain
- Colchester in DecemberUnited Kingdom · 41 kmHigh 7.6°C · Low 3.7°C · 62 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 Southend-on-Sea) is explained once on the Southend-on-Sea year overview and on the Sources, method and limits page.