St Helens in May
May in St Helens is peak autumn, and the weather reflects it. You're looking at average daily highs of 15.3 degrees.
Expect the mercury to hit around 15.3 degrees during the day and settle at 8.2 degrees after dark. The temperature stays pretty consistent through the day. It's cool but manageable. A jumper handles most of it.
May is 2.5 degrees cooler than St Helens's yearly average.
You're looking at 81mm of rain across 12 days in a typical May. Moderate, often falling in a few good dumps rather than constant drizzle.
Solar exposure averages 7.7 MJ/m2 per day in May, with UV levels in the moderate range. Sunscreen is still wise, especially if you burn easily.
With a Comfort Score of 2.5/10, May is not the most comfortable time to visit.
Packing tip: bring a decent jumper or fleece, and waterproof gear.
Scroll down for the detailed climate data, or explore what nearby cities are like in May.
May at a Glance
Temperature Range
Daily temperature range in May. The bar shows the typical spread between overnight lows and afternoon highs.
What to Pack
- Layered clothing for mild to cool conditions
- A warm jumper or fleece for cool mornings and evenings
- Proper rain gear for frequent showers
Coming From Overseas?
How May in St Helens stacks up against major cities around the world.
About 3 degrees cooler and considerably wetter.
About 8 degrees cooler and considerably drier.
About 9 degrees cooler and considerably drier.
How May Compares
St Helens's monthly climate at a glance. May is highlighted.
| Month | Max | Min | Rain | Comfort |
|---|---|---|---|---|
| Jan | 22.3 | 13.9 | 41mm | 9.5 |
| Feb | 23.5 | 13.1 | 80mm | 10.0 |
| Mar | 21.5 | 12.1 | 35mm | 8.6 |
| Apr | 18.0 | 9.3 | 70mm | 5.5 |
| May | 15.3 | 8.2 | 81mm | 2.5 |
| Jun | 12.6 | 6.2 | 79mm | 1.0 |
| Jul | 12.1 | 5.3 | 125mm | 1.0 |
| Aug | 15.0 | 8.3 | 61mm | 2.6 |
| Sep | 15.2 | 7.5 | 87mm | 3.2 |
| Oct | 17.2 | 8.2 | 56mm | 5.7 |
| Nov | 19.1 | 10.8 | 158mm | 5.9 |
| Dec | 22.1 | 12.1 | 49mm | 9.5 |