St Helens Weather and Climate
Climate Snapshot
St Helens's warmest month in 2024 was February, averaging 23.5 degrees. That gives St Helens an annual average daytime high of 17.8 degrees, 1.4 degrees warmer than the Tasmania mean.
Daytime highs peak at 23.5 degrees in February and bottom out with overnight lows of 5.3 degrees in July. That is a 18.2 degree spread from hottest afternoon to coldest night. Overnight minimums average 9.6 degrees across the year, 0.7 degrees warmer than the Tasmania average of 8.9.
Annual rainfall totals 921mm across 100 rain days, 21 percent drier than the Tasmania average. The wettest month is November at 158mm, and March is the driest at 35mm.
There's a moderate seasonal swing in rainfall. Some months are wetter, but you won't see a true monsoon-style wet-dry split.
Our Comfort Score puts February on top at 10.0/10 and June at the bottom with 1.0/10. That's the best and worst months for pleasant weather.
Scroll down for the full month-by-month breakdown, or jump straight to February if you're picking the best time to visit St Helens.
Monthly Comfort Score
Our Comfort Score rates each month from 1 (tough) to 10 (ideal) based on temperature, humidity, rainfall, UV, and sunshine. How we calculate it
Annual Comfort Score: 5.4/10 - Ranked #174 of 213 Australian cities (national avg 6.2, TAS avg 4.4)
Seasonal Overview
| Season | Avg Max °C | Avg Min °C | Total Rain mm | Comfort |
|---|---|---|---|---|
| Summer | 22.6 | 13.0 | 169 | 9.7 |
| Autumn | 18.3 | 9.9 | 186 | 5.5 |
| Winter | 13.2 | 6.6 | 265 | 1.5 |
| Spring | 17.2 | 8.8 | 301 | 4.9 |
Monthly Climate Averages
| Month | Max °C | Min °C | Rain mm | Rain Days | Solar MJ | Humidity % | Comfort |
|---|
Weather by Month
Detailed climate data, packing advice, and what to expect for each month in St Helens.
22.3°C, 41mm rain February
23.5°C, 80mm rain March
21.5°C, 35mm rain April
18.0°C, 70mm rain May
15.3°C, 81mm rain June
12.6°C, 79mm rain July
12.1°C, 125mm rain August
15.0°C, 61mm rain September
15.2°C, 87mm rain October
17.2°C, 56mm rain November
19.1°C, 158mm rain December
22.1°C, 49mm rain
Compare and Explore
Similar Climates
If you like St Helens's climate, you might also consider: