Climate averages 1991–2020
Bolton weather
in July.
A mild, moderately wet month: the warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a mild month in Bolton: daytime highs average 18.6°C and nights cool to about 11.8°C. By daytime temperature it is the warmest month of the year.
Expect about 82 mm of rain on roughly 15 days, which makes July a moderately wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 16 h 30 min on an average July day.
The nearest other city in this atlas is Wigan (14 km away). In July its highs average 19.0°C, about as warm as Bolton, with 80 mm of rain.
Among the 143 cities listed in the United Kingdom, Bolton ranks joint 120th of 143 for the warmest July highs and joint 123rd of 143 for the driest July (rainfall, lowest first). The mean July high of those 143 cities is 20.0°C; Bolton is 1.4°C cooler than that mean.
From July to August, average highs fall by 0.3°C to 18.2°C, and monthly rainfall rises from 82 mm to 89 mm.
The annual picture
July 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, selected | 18.6°C11.8°C | 11.8°C | 82 | 14.8 | 16.516 h |
| August | 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
July in nearby cities
- Wigan in JulyUnited Kingdom · 14 kmHigh 19.0°C · Low 12.5°C · 80 mm rain
- Salford in JulyUnited Kingdom · 14 kmHigh 19.1°C · Low 12.0°C · 84 mm rain
- Manchester in JulyUnited Kingdom · 17 kmHigh 19.2°C · Low 12.1°C · 84 mm rain
- Rochdale in JulyUnited Kingdom · 19 kmHigh 18.7°C · Low 11.7°C · 84 mm rain
- Blackburn in JulyUnited Kingdom · 19 kmHigh 18.2°C · Low 11.6°C · 99 mm rain
- Oldham in JulyUnited Kingdom · 21 kmHigh 18.3°C · Low 11.4°C · 84 mm rain
- Warrington in JulyUnited Kingdom · 23 kmHigh 19.2°C · Low 12.5°C · 82 mm rain
- St Helens in JulyUnited Kingdom · 25 kmHigh 18.9°C · Low 12.7°C · 80 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.