Climate averages 1991–2020
St Helens weather
in July.
A mild, moderately wet month: the warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a mild month in St Helens: daytime highs average 18.9°C and nights cool to about 12.7°C. By daytime temperature it is the warmest month of the year.
Expect about 80 mm of rain on roughly 15 days, which makes July a moderately wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 16 h 28 min on an average July day.
The nearest other city in this atlas is Warrington (12 km away). In July its highs average 19.2°C, about as warm as St Helens, with 82 mm of rain.
Among the 143 cities listed in the United Kingdom, St Helens ranks 113th of 143 for the warmest July highs and joint 118th of 143 for the driest July (rainfall, lowest first). The mean July high of those 143 cities is 20.0°C; St Helens is 1.0°C cooler than that mean.
From July to August, average highs fall by 0.2°C to 18.7°C, and monthly rainfall rises from 80 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
St Helens climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 6.9°C2.6°C | 2.6°C | 79 | 15.0 | 8.18 h |
| February | 7.4°C2.4°C | 2.4°C | 68 | 13.2 | 9.810 h |
| March | 9.4°C3.3°C | 3.3°C | 67 | 13.0 | 11.812 h |
| April | 11.9°C4.9°C | 4.9°C | 64 | 12.5 | 14.014 h |
| May | 14.8°C7.8°C | 7.8°C | 66 | 12.6 | 15.916 h |
| June | 17.2°C10.7°C | 10.7°C | 79 | 13.3 | 16.917 h |
| July, selected | 18.9°C12.7°C | 12.7°C | 80 | 14.9 | 16.516 h |
| August | 18.7°C12.7°C | 12.7°C | 89 | 15.2 | 14.815 h |
| September | 16.6°C10.8°C | 10.8°C | 78 | 12.7 | 12.813 h |
| October | 13.3°C8.2°C | 8.2°C | 91 | 14.6 | 10.611 h |
| November | 9.6°C5.2°C | 5.2°C | 92 | 16.1 | 8.79 h |
| December | 7.2°C3.0°C | 3.0°C | 98 | 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
- Warrington in JulyUnited Kingdom · 12 kmHigh 19.2°C · Low 12.5°C · 82 mm rain
- Wigan in JulyUnited Kingdom · 12 kmHigh 19.0°C · Low 12.5°C · 80 mm rain
- Liverpool in JulyUnited Kingdom · 17 kmHigh 18.6°C · Low 13.2°C · 87 mm rain
- Bolton in JulyUnited Kingdom · 25 kmHigh 18.6°C · Low 11.8°C · 82 mm rain
- Southport in JulyUnited Kingdom · 28 kmHigh 18.2°C · Low 13.5°C · 97 mm rain
- Salford in JulyUnited Kingdom · 30 kmHigh 19.1°C · Low 12.0°C · 84 mm rain
- Chester in JulyUnited Kingdom · 31 kmHigh 19.5°C · Low 12.7°C · 84 mm rain
- Manchester in JulyUnited Kingdom · 33 kmHigh 19.2°C · Low 12.1°C · 84 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 St Helens) is explained once on the St Helens year overview and on the Sources, method and limits page.
Wigan lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.