Annual mean 21°C · wettest around May · prevailing wind SE
Warmest
31.4 °C
Coldest
14.1 °C
Wettest
43%
Windiest
5.7 m/s
Prevailing
SE
4.6 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Port Arthur over the whole year is 21°C. August is the hottest month, with highs of about 30°C; January is the coldest, with lows of about 9°C. Port Arthur has no sharply defined rainy season: the chance of rain on a given day runs from 28% in February, the driest month, to 37% in May, the wettest. Winds in Port Arthur are highest in April, averaging 4.7 m/s (17 km/h), and lightest in July, at 3.0 m/s (11 km/h). The prevailing wind is from the SE. The clearest skies in Port Arthur come in August, when the sky is typically 24% covered; February is the cloudiest month, at 59%.
Month by month Port Arthur climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
14°C
9°C
11°C
33%
48%
4.1 m/s
34
3
61
February
17°C
13°C
15°C
28%
59%
4.3 m/s
53
8
62
March
21°C
16°C
19°C
30%
51%
4.4 m/s
65
18
61
April
24°C
18°C
22°C
33%
48%
4.7 m/s
74
31
47
May
27°C
22°C
28°C
37%
44%
4.1 m/s
42
62
14
June
29°C
24°C
32°C
36%
33%
3.6 m/s
11
45
2
July
30°C
25°C
35°C
35%
26%
3.0 m/s
3
28
0
August
30°C
25°C
34°C
37%
24%
3.0 m/s
4
30
1
September
30°C
24°C
32°C
31%
27%
3.0 m/s
17
47
5
October
26°C
19°C
26°C
31%
30%
3.6 m/s
43
51
27
November
20°C
14°C
19°C
32%
40%
3.6 m/s
59
21
57
December
17°C
12°C
14°C
32%
52%
3.9 m/s
46
9
62
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Port Arthur weather by season
Year round, Port Arthur has days of about 14°C at their warmest in January, its coolest month, and 30°C in August, its warmest; the coolest hours of the day run from 9°C to 25°C through the year, and the average temperature over the year is 21°C around the clock. Rain is most likely around May and least likely around February. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Port Arthur weather in winterDecember to February
High 16°CLow 11°CRain 31%
Winter in Port Arthur has typical daily highs of about 16°C and lows of about 11°C, with a 31% chance of rain on a given day.
Port Arthur weather in springMarch to May
High 24°CLow 19°CRain 33%
Spring in Port Arthur has typical daily highs of about 24°C and lows of about 19°C, with a 33% chance of rain on a given day.
Port Arthur weather in summerJune to August
High 30°CLow 25°CRain 36%
Summer in Port Arthur has typical daily highs of about 30°C and lows of about 25°C, with a 36% chance of rain on a given day.
Port Arthur weather in autumnSeptember to November
High 25°CLow 19°CRain 31%
Autumn in Port Arthur has typical daily highs of about 25°C and lows of about 19°C, with a 31% chance of rain on a given day.
When is the rainy season in Port Arthur?
Port Arthur has no sharply defined rainy season: the chance of rain on a given day runs from 28% in February, the driest month, to 37% in May, the wettest.
What time of year is Port Arthur windiest?
Winds in Port Arthur are highest in April, averaging 4.7 m/s (17 km/h), and lightest in July, at 3.0 m/s (11 km/h). The prevailing wind is from the SE.
What is the average temperature in Port Arthur year round?
The average temperature in Port Arthur over the whole year is 21°C. August is the hottest month, with highs of about 30°C; January is the coldest, with lows of about 9°C.