Annual mean 13°C · wettest around July · prevailing wind W
Warmest
24.3 °C
Coldest
10.7 °C
Wettest
35%
Windiest
6.5 m/s
Prevailing
W
5.7 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
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 Hamilton over the whole year is 13°C. January is the hottest month, with highs of about 24°C; July is the coldest, with lows of about 6°C. The rainy (wet) season in Hamilton runs from May to November, peaking in July with a 32% chance of rain on a given day. The dry season is December to April; January is the driest month, at 11%. Winds in Hamilton are highest in January, averaging 4.9 m/s (18 km/h), and lightest in April, at 4.1 m/s (15 km/h). The prevailing wind is from the W. The clearest skies in Hamilton come in January, when the sky is typically 75% covered; August is the cloudiest month, at 84%.
Month by month Hamilton 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
24°C
15°C
20°C
11%
75%
4.9 m/s
65
26
58
February
23°C
14°C
19°C
11%
76%
4.9 m/s
65
19
65
March
21°C
13°C
18°C
12%
79%
4.6 m/s
62
15
68
April
18°C
11°C
14°C
19%
83%
4.1 m/s
44
2
79
May
14°C
8°C
10°C
26%
83%
4.4 m/s
14
0
70
June
12°C
7°C
7°C
31%
83%
4.4 m/s
1
0
55
July
11°C
6°C
6°C
32%
83%
4.9 m/s
0
0
47
August
12°C
7°C
7°C
30%
84%
4.8 m/s
3
0
54
September
14°C
8°C
9°C
32%
83%
4.9 m/s
10
0
62
October
16°C
9°C
11°C
27%
80%
4.7 m/s
27
1
71
November
19°C
11°C
15°C
22%
80%
4.7 m/s
42
9
69
December
21°C
13°C
17°C
16%
76%
4.9 m/s
55
13
68
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 Hamilton weather by season
Year round, Hamilton has days of about 11°C at their warmest in July, its coolest month, and 24°C in January, its warmest; the coolest hours of the day run from 6°C to 15°C through the year, and the average temperature over the year is 13°C around the clock. Rain is most likely around July and least likely around January. 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.
Hamilton weather in winterJune to August
High 12°CLow 7°CRain 31%
Winter in Hamilton has typical daily highs of about 12°C and lows of about 7°C, with a 31% chance of rain on a given day.
Hamilton weather in springSeptember to November
High 16°CLow 9°CRain 27%
Spring in Hamilton has typical daily highs of about 16°C and lows of about 9°C, with a 27% chance of rain on a given day.
Hamilton weather in summerDecember to February
High 23°CLow 14°CRain 13%
Summer in Hamilton has typical daily highs of about 23°C and lows of about 14°C, with a 13% chance of rain on a given day.
Hamilton weather in autumnMarch to May
High 18°CLow 11°CRain 19%
Autumn in Hamilton has typical daily highs of about 18°C and lows of about 11°C, with a 19% chance of rain on a given day.
When is the rainy season in Hamilton?
The rainy (wet) season in Hamilton runs from May to November, peaking in July with a 32% chance of rain on a given day. The dry season is December to April; January is the driest month, at 11%.
What time of year is Hamilton windiest?
Winds in Hamilton are highest in January, averaging 4.9 m/s (18 km/h), and lightest in April, at 4.1 m/s (15 km/h). The prevailing wind is from the W.
What is the average temperature in Hamilton year round?
The average temperature in Hamilton over the whole year is 13°C. January is the hottest month, with highs of about 24°C; July is the coldest, with lows of about 6°C.