Port Arthur Weather and Climate
Climate Snapshot
Port Arthur's warmest month in 2024 was February, averaging 21.5 degrees. That gives Port Arthur an annual average daytime high of 16.5 degrees, right on the Tasmania average.
Daytime highs peak at 21.5 degrees in February and bottom out with overnight lows of 6.7 degrees in July. That is a 14.8 degree spread from hottest afternoon to coldest night. Overnight minimums average 9.9 degrees across the year, 1.0 degrees warmer than the Tasmania average of 8.9.
Annual rainfall totals 774mm across 140 rain days, 33 percent drier than the Tasmania average. The wettest month is December at 122mm, and February is the driest at 23mm.
Rainfall varies dramatically through the year. The wettest month (December) gets over 5 times as much rain as the driest (February).
By our reckoning, February (9.0/10) is when the weather is at its finest, while June (1.0/10) is the toughest month to be outdoors.
The full data table below breaks it all down month by month. If you're in a hurry, February is your best bet.
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: 4.4/10 - Ranked #195 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 | 20.8 | 12.7 | 244 | 8.0 |
| Autumn | 16.7 | 10.6 | 141 | 4.2 |
| Winter | 12.5 | 7.5 | 198 | 1.2 |
| Spring | 16.0 | 8.7 | 191 | 4.3 |
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 Port Arthur.
20.7°C, 99mm rain February
21.5°C, 23mm rain March
19.6°C, 29mm rain April
16.4°C, 77mm rain May
14.1°C, 36mm rain June
11.7°C, 37mm rain July
11.7°C, 72mm rain August
14.1°C, 89mm rain September
14.1°C, 54mm rain October
15.8°C, 73mm rain November
18.2°C, 64mm rain December
20.1°C, 122mm rain
Compare and Explore
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