Annual mean 13°C · wettest around March · prevailing wind SW
Warmest
28.9 °C
Coldest
1.0 °C
Wettest
52%
Windiest
5.1 m/s
Prevailing
SW
4.0 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 13°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 35% in September, the driest month, to 47% in March, the wettest. Winds in Hamilton are highest in March, averaging 3.6 m/s (13 km/h), and lightest in August, at 1.9 m/s (7 km/h). The prevailing wind is from the SW. The clearest skies in Hamilton come in July, when the sky is typically 36% covered; January is the cloudiest month, at 67%.
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
45%
67%
3.4 m/s
1
0
9
February
6°C
-0°C
0°C
45%
56%
3.5 m/s
4
0
21
March
10°C
3°C
5°C
47%
53%
3.6 m/s
14
0
38
April
16°C
8°C
12°C
45%
51%
3.3 m/s
37
4
59
May
22°C
14°C
20°C
44%
49%
2.8 m/s
58
25
54
June
27°C
19°C
27°C
40%
38%
2.4 m/s
54
50
25
July
28°C
21°C
29°C
38%
36%
2.1 m/s
29
64
7
August
28°C
19°C
29°C
36%
37%
1.9 m/s
38
61
12
September
25°C
16°C
25°C
35%
36%
2.0 m/s
58
46
34
October
19°C
10°C
16°C
39%
44%
2.4 m/s
48
13
63
November
10°C
3°C
6°C
41%
48%
2.8 m/s
14
1
43
December
5°C
0°C
0°C
41%
59%
3.0 m/s
2
0
19
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 13°C around the clock. Rain is most likely around March and least likely around September. 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 4°CLow -1°CRain 44%
Winter in Hamilton has typical daily highs of about 4°C and lows of about -1°C, with a 44% chance of rain on a given day.
Hamilton weather in springMarch to May
High 16°CLow 9°CRain 45%
Spring in Hamilton has typical daily highs of about 16°C and lows of about 9°C, with a 45% chance of rain on a given day.
Hamilton weather in summerJune to August
High 28°CLow 20°CRain 38%
Summer in Hamilton has typical daily highs of about 28°C and lows of about 20°C, with a 38% chance of rain on a given day.
Hamilton weather in autumnSeptember to November
High 18°CLow 9°CRain 38%
Autumn in Hamilton has typical daily highs of about 18°C and lows of about 9°C, with a 38% 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 35% in September, the driest month, to 47% in March, the wettest.
What time of year is Hamilton windiest?
Winds in Hamilton are highest in March, averaging 3.6 m/s (13 km/h), and lightest in August, at 1.9 m/s (7 km/h). The prevailing wind is from the SW.
What is the average temperature in Hamilton year round?
The average temperature in Hamilton over the whole year is 13°C. July is the hottest month, with highs of about 28°C; January is the coldest, with lows of about -2°C.