Climate averages 1991–2020
Bolton weather
in August.
A mild, moderately wet month: the 2nd warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a mild month in Bolton: daytime highs average 18.2°C and nights cool to about 11.8°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 89 mm of rain on roughly 15 days, which makes August a moderately wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 49 min on an average August day.
The nearest other city in this atlas is Wigan (14 km away). In August its highs average 18.7°C, about as warm as Bolton, with 89 mm of rain.
Among the 143 cities listed in the United Kingdom, Bolton ranks joint 124th of 143 for the warmest August highs and joint 123rd of 143 for the driest August (rainfall, lowest first). The mean August high of those 143 cities is 19.7°C; Bolton is 1.5°C cooler than that mean.
From August to September, average highs fall by 2.1°C to 16.1°C, and monthly rainfall falls from 89 mm to 77 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
Bolton climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 6.2°C1.7°C | 1.7°C | 83 | 15.1 | 8.18 h |
| February | 6.8°C1.4°C | 1.4°C | 72 | 13.3 | 9.810 h |
| March | 8.9°C2.4°C | 2.4°C | 70 | 13.0 | 11.812 h |
| April | 11.5°C4.0°C | 4.0°C | 65 | 12.7 | 14.014 h |
| May | 14.5°C6.9°C | 6.9°C | 67 | 12.7 | 15.916 h |
| June | 16.9°C9.9°C | 9.9°C | 81 | 13.8 | 17.017 h |
| July | 18.6°C11.8°C | 11.8°C | 82 | 14.8 | 16.516 h |
| August, selected | 18.2°C11.8°C | 11.8°C | 89 | 15.1 | 14.815 h |
| September | 16.1°C9.8°C | 9.8°C | 77 | 12.7 | 12.813 h |
| October | 12.7°C7.3°C | 7.3°C | 91 | 14.7 | 10.611 h |
| November | 8.9°C4.3°C | 4.3°C | 91 | 16.1 | 8.79 h |
| December | 6.5°C2.1°C | 2.1°C | 99 | 15.5 | 7.68 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
- Wigan in AugustUnited Kingdom · 14 kmHigh 18.7°C · Low 12.5°C · 89 mm rain
- Salford in AugustUnited Kingdom · 14 kmHigh 18.8°C · Low 11.9°C · 89 mm rain
- Manchester in AugustUnited Kingdom · 17 kmHigh 18.8°C · Low 12.0°C · 89 mm rain
- Rochdale in AugustUnited Kingdom · 19 kmHigh 18.3°C · Low 11.6°C · 89 mm rain
- Blackburn in AugustUnited Kingdom · 19 kmHigh 17.9°C · Low 11.6°C · 108 mm rain
- Oldham in AugustUnited Kingdom · 21 kmHigh 18.0°C · Low 11.4°C · 88 mm rain
- Warrington in AugustUnited Kingdom · 23 kmHigh 18.9°C · Low 12.5°C · 89 mm rain
- St Helens in AugustUnited Kingdom · 25 kmHigh 18.7°C · Low 12.7°C · 89 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 Bolton) is explained once on the Bolton year overview and on the Sources, method and limits page.
Warrington lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.