St Helens Climate by Month
St Helens, England, United Kingdom
Mild summers and cool winters, with rain spread through the year.
St Helens has mild summers and cool winters, with rain spread through the year. July is the warmest month, with highs around 69°F (21°C); January is the coolest at 46°F (8°C), and nights dip to 36°F (2°C). It gets 35 in (881 mm) of rain a year, spread across the months. The air is humid, averaging 82% relative humidity.
- Warmest month
- 69°F(21°C)
- Average high, July
- Coldest nights
- 36°F(2°C)
- Average low, February
- Rain per year
- 35 in(881 mm)
- No clear rainy season
- Humidity
- 82%
- Sunniest: June
Best and worst months in St Helens
Best for weatherJuly is the best time for weather in St Helens: highs near 69°F (21°C) and about 3.0 in (77 mm) of rain a month.
Least pleasantDecember and January are the least pleasant; December is the coldest, with highs of only 46°F (8°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in July.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
St Helens weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 46°F(8°C) | 36°F(2°C) | 2.7 in(69 mm) | 92% | 0.6 |
| FebFebruary | 47°F(8°C) | 36°F(2°C) | 2.1 in(54 mm) | 91% | 1.3 |
| MarMarch | 51°F(10°C) | 38°F(3°C) | 2.2 in(56 mm) | 82% | 2.3 |
| AprApril | 56°F(13°C) | 41°F(5°C) | 2.1 in(53 mm) | 77% | 3.7 |
| MayMay | 62°F(17°C) | 46°F(8°C) | 2.2 in(56 mm) | 71% | 4.8 |
| JunJune | 66°F(19°C) | 51°F(11°C) | 2.9 in(73 mm) | 77% | 4.9 |
| JulJulyBest | 69°F(21°C) | 55°F(13°C) | 3.0 in(77 mm) | 74% | 4.8 |
| AugAugust | 68°F(20°C) | 54°F(12°C) | 3.3 in(84 mm) | 81% | 3.8 |
| SepSeptember | 64°F(18°C) | 50°F(10°C) | 3.1 in(79 mm) | 81% | 2.7 |
| OctOctober | 58°F(14°C) | 45°F(7°C) | 3.8 in(96 mm) | 85% | 1.5 |
| NovNovember | 51°F(11°C) | 40°F(5°C) | 3.6 in(92 mm) | 87% | 0.7 |
| DecDecember | 46°F(8°C) | 36°F(2°C) | 3.6 in(92 mm) | 91% | 0.5 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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