Annual mean 12°C · wettest around May · prevailing wind W
Warmest
28.7 °C
Coldest
1.5 °C
Wettest
41%
Windiest
4.7 m/s
Prevailing
W
3.5 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
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 12°C. July is the hottest month, with highs of about 28°C; January is the coldest, with lows of about -2°C. Hamilton has no sharply defined rainy season: the chance of rain on a given day runs from 31% in January, the driest month, to 43% in May, the wettest. Winds in Hamilton are highest in March, averaging 3.5 m/s (13 km/h), and lightest in August, at 1.8 m/s (6 km/h). The prevailing wind is from the W. The clearest skies in Hamilton come in July, when the sky is typically 34% covered; January is the cloudiest month, at 54%.
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
2°C
-2°C
-4°C
31%
54%
3.2 m/s
1
0
8
February
4°C
0°C
-1°C
33%
48%
3.2 m/s
3
0
17
March
9°C
3°C
4°C
34%
46%
3.5 m/s
10
0
35
April
15°C
8°C
11°C
38%
46%
3.2 m/s
33
4
57
May
20°C
13°C
18°C
43%
52%
2.4 m/s
55
17
63
June
25°C
18°C
25°C
40%
38%
2.3 m/s
63
42
37
July
28°C
21°C
29°C
38%
34%
1.9 m/s
32
63
9
August
27°C
19°C
28°C
38%
39%
1.8 m/s
46
57
18
September
23°C
16°C
23°C
39%
40%
1.8 m/s
66
35
48
October
18°C
10°C
15°C
38%
42%
2.3 m/s
49
10
68
November
10°C
4°C
6°C
31%
40%
2.8 m/s
12
0
41
December
4°C
0°C
-1°C
36%
51%
2.8 m/s
0
0
13
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 2°C at their warmest in January, its coolest month, and 28°C in July, its warmest; the coolest hours of the day run from -2°C to 21°C through the year, and the average temperature over the year is 12°C around the clock. Rain is most likely around May 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 winterDecember to February
High 3°CLow -0°CRain 34%
Winter in Hamilton has typical daily highs of about 3°C and lows of about -0°C, with a 34% chance of rain on a given day.
Hamilton weather in springMarch to May
High 15°CLow 8°CRain 39%
Spring in Hamilton has typical daily highs of about 15°C and lows of about 8°C, with a 39% chance of rain on a given day.
Hamilton weather in summerJune to August
High 27°CLow 19°CRain 39%
Summer in Hamilton has typical daily highs of about 27°C and lows of about 19°C, with a 39% chance of rain on a given day.
Hamilton weather in autumnSeptember to November
High 17°CLow 10°CRain 36%
Autumn in Hamilton has typical daily highs of about 17°C and lows of about 10°C, with a 36% chance of rain on a given day.
When is the rainy season in Hamilton?
Hamilton has no sharply defined rainy season: the chance of rain on a given day runs from 31% in January, the driest month, to 43% in May, the wettest.
What time of year is Hamilton windiest?
Winds in Hamilton are highest in March, averaging 3.5 m/s (13 km/h), and lightest in August, at 1.8 m/s (6 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 12°C. July is the hottest month, with highs of about 28°C; January is the coldest, with lows of about -2°C.