Climate averages 1991–2020
Colchester weather
in August.
A mild, moderately wet month: one of the warmest and one of the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a mild month in Colchester: daytime highs average 20.7°C and nights cool to about 14.4°C. By daytime temperature it is one of the warmest months of the year.
Expect about 64 mm of rain on roughly 11 days, which makes August a moderately wet month (one of the wettest months of the year). Daylight, from sunrise to sunset, lasts about 14 h 39 min on an average August day.
The nearest other city in this atlas is Ipswich (26 km away). In August its highs average 20.8°C, about as warm as Colchester, with 62 mm of rain.
Among the 143 cities listed in the United Kingdom, Colchester ranks joint 36th of 143 for the warmest August highs and joint 65th of 143 for the driest August (rainfall, lowest first). The mean August high of those 143 cities is 19.7°C; Colchester is 1.0°C warmer than that mean.
From August to September, average highs fall by 2.7°C to 18.1°C, and monthly rainfall falls from 64 mm to 52 mm.
The annual picture
August 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
Colchester climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 7.1°C3.0°C | 3.0°C | 57 | 12.1 | 8.38 h |
| February | 7.4°C2.8°C | 2.8°C | 47 | 9.8 | 9.910 h |
| March | 9.5°C4.0°C | 4.0°C | 43 | 10.2 | 11.812 h |
| April | 12.2°C5.9°C | 5.9°C | 45 | 10.4 | 13.914 h |
| May | 15.3°C8.9°C | 8.9°C | 53 | 10.0 | 15.616 h |
| June | 18.2°C11.9°C | 11.9°C | 57 | 10.8 | 16.617 h |
| July | 20.7°C14.2°C | 14.2°C | 58 | 11.8 | 16.216 h |
| August, selected | 20.7°C14.4°C | 14.4°C | 64 | 10.7 | 14.715 h |
| September | 18.1°C12.3°C | 12.3°C | 52 | 10.3 | 12.713 h |
| October | 14.3°C9.5°C | 9.5°C | 64 | 11.4 | 10.711 h |
| November | 10.3°C6.0°C | 6.0°C | 61 | 11.1 | 8.99 h |
| December | 7.6°C3.7°C | 3.7°C | 62 | 11.6 | 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
August in nearby cities
- Ipswich in AugustUnited Kingdom · 26 kmHigh 20.8°C · Low 14.2°C · 62 mm rain
- Chelmsford in AugustUnited Kingdom · 34 kmHigh 21.1°C · Low 13.9°C · 59 mm rain
- Southend-on-Sea in AugustUnited Kingdom · 41 kmHigh 20.8°C · Low 14.6°C · 63 mm rain
- Basildon in AugustUnited Kingdom · 47 kmHigh 20.9°C · Low 14.2°C · 58 mm rain
- Harlow in AugustUnited Kingdom · 56 kmHigh 21.1°C · Low 13.2°C · 63 mm rain
- Gillingham in AugustUnited Kingdom · 61 kmHigh 21.1°C · Low 14.0°C · 58 mm rain
- Grays in AugustUnited Kingdom · 61 kmHigh 21.3°C · Low 14.0°C · 60 mm rain
- Dagenham in AugustUnited Kingdom · 63 kmHigh 21.3°C · Low 13.9°C · 60 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 Colchester) is explained once on the Colchester year overview and on the Sources, method and limits page.